Rambler's Top100Astronet    
  po tekstam   po klyuchevym slovam   v glossarii   po saitam   perevod   po katalogu
 

Novosti nauki
The R.A.P. Project
21.08.02. astro-ph za 09 avgusta - 21 avgusta 2002 goda: izbrannye stat'i


obzor! astro-ph/0208170 The Roles of Small Telescopes in a Virtual Observatory Environment
Authors: S.G. Djorgovski
Comments: PDF file, 10 pages including 2 figures. An invited paper, to appear in: "The Future of Small Telescopes", ed. T. Oswalt, Kluwer, in press

Chto mogut delat' malen'kie teleskopy v epohu bol'shih teleskopov? Eto, kstati skazat', dovol'no aktual'nyi vopros dlya nashei strany. V stat'e daetsya obzor celei i metodov togo, chto nazyvaetsya Virtual'noi observatoriei (sm. takzhe obzor "Challenges for Cluster Analysis in a Virtual Observatory" astro-ph/0208246).

Sovremennye informacionnye tehnologii pozvolyayut ochen' effektivno ispol'zovat' set' iz mnozhestva nebol'shih teleskopov, razbrosannyh po vsemu miru. V pervuyu ochered' rech' idet ob obzorah i nepreryvnyh nablyudeniyah (ponyatno, chto dnem-to smotret' nel'zya, a 5-6 teleskopov na raznyh dolgotah mogut pozvolit' provodit' monitoring 24 chasa v sutki, konechno na sluchai plohoi pogody neobhodimo dublirovat' instrumenty, raznosya ih i po shirote i t.d.).

Zamechu, chto eto pravil'no provodit' special'nye konferencii, posvyashennye ispol'zovaniya malen'kih teleskopov (no ne slyshal ob analogichnyh v nashei strane).


obzor! astro-ph/0208176 Cosmic Expansion and Ho: A Retro- and Pro-Spective Note
Authors: G.A. Tammann, B. Reindl
Comments: 15 pages (2 figures). To appear in the proceedings of the XXXVIIth Moriond Astrophysics Meeting "The Cosmological Model", Les Arcs, France, March 16-23, 2002

Daetsya istoricheskii obzor metodov izmereniya kosmologicheskih rasstoyanii (i, sootvetstvenno, opredeleniya postoyannoi Habbla). Takzhe obsuzhdayutsya problemy, sushestvuyushie po sei den', v pervuyu ochered' - kalibrovka cefeid (sm. takzhe stat'yu teh zhe avtorov, posvyashennuyu budushemu vkladu sputnika GAIA v izmereniya vnegalakticheskih rasstoyanii).


astro-ph/0208177 WhiteDwarf.org - Establishing a permanent endowment for the Whole Earth Telescope
Authors: Travis S. Metcalfe
Comments: 5 pages, to appear in proceedings of the 6th Whole Earth Telescope workshop

Opisyvaetsya lyubopytnaya organizaciya, ch'e nazvanie lichno u menya vyzyvaet associacii s knigami Shekli: White Dwarf Research Corporation. Eto nekommercheskaya organizaciya, zanimayushayasya issledovaniem belyh karlikov. Predpolagaetsya, chto instituty takogo tipa, blagodarya bolee prostoi strukture, mogut ochen' effektivno ispol'zovat' sredstva.


astro-ph/0208181 Environment Shaping Galaxies: Spectroscopy of Cluster Galaxies
Authors: Bianca M. Poggianti
Comments: 10 pages, Latex, newpasp macro included, 5 postscript figures. Invited talk at the meeting "Matter and energy in clusters of galaxies", Taiwan 23-27 Apr 2002, proceedings in press

Predstavleny rezul'taty issledovanii vliyaniya okruzheniya galatiki v skoplenii na zvezdoobrazovanie v samoi galaktike.


obzor! astro-ph/0208182 Antimatter from primordial black holes
Authors: Aurelien Barrau
Comments: proceedings of the XIVth Rencontres de Blois : Matter-Antimatter Asymmetry

Pervichnye chernye dyry poka ne otkryty. Samyi izvestnyi predel na ih prostranstvennuyu plotnost' stavitsya po gamma-nablyudeniyam. Odnako, pri isparenii takzhe izluchayutsya antiprotony i voobshe antiyadra. Sootvetstvenno, nablyudeniya teh zhe antiprotonov mogut svidetel'stvovat' o sushestvovanii pervichnyh chernyh dyr (i naoborot). V obzore obsuzhdayutsya poslednie rezul'taty po issledovaniyam antiprotonov i antideitronov v svyazi s izucheniem pervichnyh chernyh dyr.


astro-ph/0208184 Orbital migration and the frequency of giant planet formation
Authors: David E. Trilling, Jonathan I. Lunine, Willy Benz
Comments: 25 pages, 5 figures. Double-space, single-column format to show long equations. Accepted for publication in A&A

Seichas modelirovanie obrazovaniya planet odna iz burno razvivayushihsya vetvei astrofiziki. V svoei rabote avtory issleduyut obrazovanie planet-gigantov pri razlichnyh predpolozheniyah o parametrah protoplanetnogo diska (zamechu, chto poka modeli diska vse-taki dovol'no primitivny).

Avtory polagayut, chto nablyudayushiesya "goryachie yupitery" eto lish' malaya dolya (1/3-1/4) vseh planet-gigantov. Gorazdo bol'she budet otkryto "yupiterov" na rasstoyaniyah bol'she 1-2 astronomicheskih edinic ot cetral'nyh zvezd. Pri etom dolya zvezd s planetami po raschetam Trillinga i dr. poluchaetsya ochen' bol'shoi: do 80 procentov.


kurs lekcii! astro-ph/0208186 Primordial Alchemy: From The Big Bang To The Present Universe
Authors: Gary Steigman
Comments: Course of lectures at the XIII Canary Islands Winter School of Astrophysics, `Cosmochemistry: The Melting Pot of Elements (November 19 - 30, 2001; Tenerife, Canary Islands, Spain). 32 pages; 16 figures

Nablyudayushiesya seichas D, 3He, 4He, i 7Li yavlyayutsya (v osnovnom) reliktami molodoi Vselennoi. Pervichnyi nukleosintez (naryadu s habblovskim potokom, reliktovym izlucheniem i krupnomasshtabnoi strukturoi) odin iz glavnyh kosmologicheskih testov: sravnivaya predskazaniya s nablyudeniyami mozhno ochen' mnogo uznat' o "pervyh treh minutah" v zhizni Vselennoi. Pro vse eto i rasskazyvaet v svoih lekciyah Garri Shteigman.


astro-ph/0208189 Massive black hole remnants of the first stars in galactic haloes
Authors: Ranty R. Islam, James E. Taylor, Joseph Silk
Comments: 10 pages, 11 figures

Est' li v galo galaktik massivnye chernye dyry? Eti ob'ekty obrazovyvalis' v rezul'tate evolyucii pervyh zvezd. Avtory stat'i issleduyut takuyu vozmozhnost'.


obzor! astro-ph/0208192 Cosmology with the Sunyaev-Zel'dovich Effect
Authors: John E. Carlstrom et al.
Comments: submitted to ARAA Oct 2001, to appear ARAA, 2002, V40

Daetsya obzor effekta Syunyaeva-Zel'dovicha i ego kosmologicheskih prilozhenii. Effekt pozvolyaet izuchat' skopleniya galaktik na bol'shih krasnyh smesheniyah; po nablyudeniyam effekta mozhno opredelyat' postoyannuyu Habbla, plotnost' veshestva vo Vselennoi.


astro-ph/0208210 Angular Radii of Stars via Microlensing
Authors: B. Scott Gaudi et al.
Comments: 13 pages, 3 figures, submitted to ApJ

Avtory predlagayut metodiku, pozvolyayushuyu opredelyat' radiusy zvezd (gigantov i glavnoi posledovatel'nosti) s ochen' vysokoi tochnost'yu. Dlya etogo trebuyutsya odnovremennye fotometricheskie nablyudeniya linzirovaniya i astrometricheskie izmereniya. Odnako, vse eto delo budushego. Krome togo, ocenki samih avtorov pokazyvayut, chto rech' mozhet idti vsego o sotne gigantov i desyatke zvezd glavnoi posledovatel'nosti. Umestno napomnit', chto seichas radiusy zvezd (blizkih gigantov) mogut byt' izmereny neposredstvenno. Krome togo, radiusy zvezd udaetsya nablyudat' pri pokrytii zvezd lunoi. Takzhe neplohie ocenki radiusov mozhno poluchat' po nablyudeniyam zatmennyh peremennyh. No vo vseh etih metodah ne dostigaetsya 5-ti procentnaya tochnost', kotoruyu obeshayut avtory novoi metodiki.


astro-ph/0208215 Multiple black holes in galactic bulges
Authors: Martin G. Haehnelt, Guinevere Kauffmann
Comments: 4 pages, LaTeX, 4 postscript figures, submitted to MNRAS

Kak izvestno, galaktiki v poru svoei molodosti aktivno slivayutsya drug s drugom. Takzhe izvestno, chto v centrah bol'shogo chisla galaktik est' sverhmassivnye chernye dyry. Znachit, mozhno ozhidat' vzaimodeistviya (naprimer sliyaniya) etih kompaktnyh monstrov pri sliyanii galaktik.

Avtory issleduyut razlichnye interesnye scenarii vzaimodeistviya chernyh dyr v central'nyh chastyah galaktik. Chernye dyry mogut slivat'sya, para chernyh dyr mozhet byt' vybroshena iz centra galaktiki (ili dazhe voobshe za predely galaktiki). Krome etogo, razumeetsya budut vybrasyvat'sya i zvezdy, raspolozhennye v centre galaktiki s neskol'kimi chernymi dyrami. Pokazano, naprimer, chto v slabyh ellipticheskih galaktikah k nastoyashemu momentu fakticheski ne ostalos' dvoinyh chernyh dyr. A v yarkih ellipticheskih galaktikah takie pary mogut vstrechat'sya primerno v 1/3 sluchaev. Kratnye chernye dyry mogut ob'yasnyat' nekotorye osobennosti v raspredelenii plotnosti zvezd v central'nyh oblastyah ellipticheskih galaktik.


obzor! astro-ph/0208219 Simulating the formation of cosmic structure
Authors: Carlos S. Frenk
Comments: 19 pages, 8 figs. Invited paper at Royal Society Discussion Meeting on `New Science from High Performance Computing.'' High resolution figures at http://star-www.dur.ac.uk:80/~csf/roysoc
Journal-ref: Phil. Tran. Roy. Soc., 2002, 300, 1277

Segodnya krupnomasshtabnaya struktura eto odin iz glavnyh kosmologicheskih testov (sm. vyshe). Krome nablyudenii zdes' bol'shuyu (ogromnuyu!) rol' igraet komp'yuternoe modelirovanie. V stat'e daetsya obzor sovremennogo modelirovaniya krupnomasshtabnoi struktury. Obsuzhdayutsya novye rezul'taty i ih sravnenie s nablyudeniyami (o formirovanii i evolyucii galaktik sm. takzhe obzor "Galaxy Formation Now and Then" astro-ph/0208252).


obzor! astro-ph/0208227 The massive star IMF
Authors: Daniel Schaerer
Comments: Invited review, to appear in IAU Symp 212, Eds. K. van der Hucht, A. Herrero, C. Esteban. Related preprints and models available at http://webast.ast.obs-mip.fr/people/schaerer/

Rabota soderzhit obzor sovremennogo sostoyaniya del v izuchenii funkcii mass massivnyh zvezd. Poskol'ku vremya zhizni takih ob'ektov ochen' malo (neskol'ko millionov let), to nablyudayut ih v osnovnom v oblastyah nedavnego burnogo zvezdoobrazovaniya. Issledovanie takih oblastei delo slozhnoe, poetomu avtor takzhe podrobno obsuzhdaet razlichnye nablyudatel'nye metodiki, pozvolyayushie ocenit' parametry funkcii mass.


astro-ph/0208228 Sensitivity of the Auger Observatory to ultra high energy photon composition through inclined showers
Authors: M. Ave et al.
Comments: 20 pages, 8 figures

Proekt Ozhe - odin iz samyh krupnyh nablyudatel'nyh proektov blizhaishego budushego. Polagayut, chto on pozvolit kachestvenno uluchshit' nablyudatel'nuyu situaciyu v izuchenii kosmicheskih luchei, v chastnosti kosmicheskih luchei sverhvysokih energii.

Odna iz osobennostei proekta - vozmozhnost' nablyudeniya sobytii s ochen' bol'shimi zenitnymi uglami. V stat'e daetsya raschet effektivnosti Observatorii pri registracii takih sobytii v zavisimosti ot sostava kosmicheskih luchei (protony, bolee tyazhelye yadra, fotony). Obsuzhdaetsya vozmozhnost' vydelit' sobytiya, svyazannye s fotonami sverhvysokih energii.


astro-ph/0208233 SuperWASP: Wide Angle Search for Planets
Authors: R.A. Street et al.
Comments: 4 pages, 1 figure, to be published in proceedings of "Scientific Frontiers in Research on Extrasolar Planets"

Korotkoe opisanie novogo proekta - SuperWASP - Shirokougol'nogo Poiska Planet. Eta polnost'yu avtomatizirovannaya sistema budet vvedena v stroi v 2003 godu. Planety budut obnaruzhivat'sya po ih prohozhdeniyam po diskam zvezd.


astro-ph/0208237 Cepheid, Tully-Fisher and SNIa Distances
Authors: T. Shanks, P.D. Allen, F. Hoyle, N.R. Tanvir
Comments: 6 pages, 4 Figures, Latex, requires newpasp.sty(included), to appear in "A New Era in Cosmology", Eds. N. Metcalfe and T. Shanks, ASP Conf Ser., 2002

Vse li v poryadke v korolevstve Datskom? Pravil'no li opredelyayutsya kosmologicheskie parametry? Avtory dayut kriticheskii analiz sovremennyh metodik i ispol'zuyushihsya v nih predpolozhenii (v pervuyu ochered' rech' idet o zavisimosti parametrov cefeid ot metallichnosti i ob analogichnoi zavisimosti dlya sverhnovyh tipa Ia).


astro-ph/0208240 On angular momentum transport in convection-dominated accretion flows
Authors: Igor V. Igumenshchev
Comments: 10 pages, will appear in ApJL

Hotya pervye raboty po teorii akkrecii poyavilis' eshe do Vtoroi Mirovoi Voiny, tam ostaetsya eshe ochen' mnogo neyasnogo. Sovremennaya teoriya diskovoi akkrecii byla sozdana 30 let nazad [ Shakura 1972, Shakura, Syunyaev 1973] (voobshe-to eto byl by horoshii povod dlya krupnoi konferencii, no ...). Odnako, v poslednie gody nachali obsuzhdat'sya rasshireniya standartnogo scenariya: t.n. advekcionno-dominirovannye i konvekcionno-dominirovannye techeniya. Voprosu o perenose ugolovogo momenta v techeniyah poslednego tipa i posvyashena stat'ya.


astro-ph/0208241 Two Rare Magnetic Cataclysmic Variables with Extreme Cyclotron Features Identified in the Sloan Digital Sky Survey
Authors: Paula Szkody et al.
Comments: Submitted for publication to Astrophysical Journal (Letters), 16 pages, 5 figures, AASTeX v4.0

60 Megagauss - horoshee nazvanie dlya tehno-gruppy. Odnako, eto rezul'taty izmereniya magnitnyh polei u dvuh novootkrytyh kataklizmicheskih peremennyh.

Istochniki byli otkryty v Sloanovskom cifrovom obzore neba. Otkrytie stol' redkih sistem pokazyvaet bol'shie potencial'nye vozmozhnosti proekta SDSS i v dannoi oblasti (dlya kotoroi on sovsem ne byl prednaznachen, sm. takzhe astro-ph/0208260 ob issledovaniyah sputnikov nashei Galaktiki po materialam SDSS).


astro-ph/0208242 Multiple Collimated Outflows in the Proto-planetary Nebula GL 618
Authors: Susan R. Trammell, Robert W. Goodrich
Comments: accepted for publication in ApJ
S pomosh'yu Kosmicheskogo teleskopa avtory issleduyut moloduyu planetarnuyu tumannost' GL 618. Eto bystro evolyucioniruyushii ob'ekt: iz "kokona" zvezdy asimptoticheskoi vetvi giginatov vyluplyaetsya babochka bipolyarnoi planetarnoi tumannosti. Na izobrazheniyah avtory obnaruzhili tri horosho kollimirovannyh strui. Po vsei vidimosti, eti obrazovaniya voznikli odnovremenno, t.e. ih nel'zya ob'yasnit' precessiei dzheta. Vozrast strui vsego okolo 500 let. Avtory obsuzhdayut rol' strui v ramkah sushestvuyushei kartiny obrazovaniya planetarnyh tumannostei.


astro-ph/0208253 M giants in Macho, DENIS and Isogal
Authors: I.S. Glass, M. Schultheis
Comments: 10 pages

Obzory soderzhat v sebe massu informacii. Eto polezno znat' i ispol'zovat' (osobenno v Rossii, gde sobstvennye nablyudatel'nye vozmozhnosti dovol'no ogranicheny). Kombiniruya dannye treh obzorov avtory issleduyut vyborku iz 174 M gigantov, popavshih v "spiski" Macho, DENIS i Isogal.


astro-ph/0208261 Photometric Light Curve for the Kuiper Belt Object 2000 EB173 on 78 Nights
Authors: Bradley E. Schaefer, David L. Rabinowitz
Comments: Accepted by Icarus, 17 pages, 2 figures

Kak izvestno za orbitoi Neptuna raspolagaetsya Poyas Koipera (PK), nekotoryi analog poyasa asteroidov. Ob'ekty v PK ochen' slabye, poetomu nablyudat' ih neprosto. Avtoram udalos' obnaruzhit' dovol'no yarkii ob'ekt i poluchit' horoshuyu krivuyu bleska. Etot istochnik (2000 EB173) ostaetsya samym yarkim iz izvestnyh ob'ektov PK. Sootvetstvenno on yavlyaetsya cel'yu nomer 1 pri izuchenii PK.


astro-ph/0208281 Probing the Masses of the PSR J0621+1002 Binary System Through Relativistic Apsidal Motion
Authors: Eric M. Splaver et al.
Comments: Accepted by ApJ, 10 pages, 5 figures

Horoshii primer togo, kak opredelyayut massy neitronnyh zvezd. Naibolee tochno eto udaetsya sdelat' v dvoinyh sistemah, gde odin iz kompan'onov - radiopul'sar (vtoraya, chashe vsego, belyi karlik).

V rassmatrivaemoi sisteme po nablyudeniyu effektov OTO udaetsya opredelit' summu mass. Ona okazalas' ravnoi 2.81 +/- 0.30 mass Solnca. Zatem, s uchetom drugih effektov, a takzhe predpolozheniya o prirode vtoroi zvezdy, udaetsya dat' ocenki mass komponent. Massa neitronnoi zvezdy ocenena kak 1.70(+0.59 -0.63) massy Solnca, a massa belogo karlika - 0.97(+0.43 -0.24). Zamechu, chto v predelah oshibok massa neitronnoi zvezdy sovmestima s "klassicheskim" znacheniem 1.4 massy Solnca.

Razumeetsya, udalos' ocenit' i drugie parametry sistemy i ee komponent, no eto uzhe ne stol' interesno ...


obzor! astro-ph/0208281 A primer on the ekpyrotic scenario
Authors: Syksy Rasanen
Comments: 69 pages, LaTeX2e. Based on a Ph.D. thesis

Na osnove svoei dissertacii avtor daet vvedenie v t.n. ekpyrotic scenario. Eto kosmologicheskaya model', yavlyayushayasya al'ternativoi inflyacii. Scenarii ne raz kritikovalsya Linde. Nadeyus', chto vskore Sergei Pavlyuchenko nachnet obzory gr-qc, i togda Vy smozhete bol'she uznat' o vseh etih kosmologicheskih scenariyah.


astro-ph/0208293 Hydrodynamical simulations of the decay of high-speed molecular turbulence. I. Dense molecular regions
Authors: Georgi Pavlovski et al.
Comments: 12 pages, 12 figures; For a version of the article with higher resolution figures, see http://star.arm.ac.uk/preprints/381.ps

Avtory chislenno issleduyut zatuhanie vysokoskorostnyh turbulentnyh techenii v plotnyh molekulyarnyh oblakah. Poskol'ku rech' idet ob otnositel'no vysokih plotnostyah, avtory uchityvayut himicheskie processy dlya vodoroda, ugleroda i kisloroda. Rezul'taty sravnivayutsya s bolee rannimi raschetami.


obzor! astro-ph/0208297 Moriond Conference Summary: The Cosmological Model(s)
Authors: Ofer Lahav
Comments: 4 pages; to appear in the proceedings of the XXXVIIth Moriond Astrophysics Meeting "The Cosmological Model", Les Arcs, France, March 2002

Daetsya kratkii obzor konferencii. Otmechaetsya, chto seichas net ser'eznyh nablyudatel'nyh svidetel'stv protiv stndartnoi (v dannyi moment) modeli: holodnaya temnaya materiya + lyambda-chlen. Odnako, imeyushiesya v dannyh neopredelennosti ostavlyayut dostatochno prostora dlya somnenii.


astro-ph/0208301 Measurement of the Spectrum of UHE Cosmic Rays by the FADC Detector of the HiRes Experiment
Authors: The High Resolution Fly's Eye Collaboration
Comments: 25 pages, 14 figures. Submitted to Astroparticle Physics
V stat'e predstavleny rezul'taty po kosmicheskim lucham sverhvysokih energii, poluchennye na detektore HiRes-II. Napomnim, chto dannye HiRes pozvolyayut usomnit'sya v otsutstvii GZK-zavala v spektre kosmicheskih luchei. Avtory detal'no opisyvayut metodiku eksperimenta i obrabotki dannyh. Sravnivaya svoi rezul'taty s dannymi AGASA, uchastniki eksperimenta HiRes po-prezhnemu vidyat MEN'ShE kosmicheskih luchei ochen' bol'shih energii.


obzor! astro-ph/0208304 On the Theory of Gamma Ray Bursts and Hypernovae: The Black Hole Soft X-ray Transient Sources
Authors: Chang-Hwan Lee, Gerald E. Brown
Comments: 59 pages, 12 figures, review article

V obzore rassmatrivayutsya evolyuciya tesnyh dvoinyh sistem s chernymi dyrami, sverhyarkie rentgenovskie istochniki (ultraluminous X-ray sources), gipernovye i gamma-vspleski. Avtory pytayutsya naiti geneticheskuyu svyaz' mezhdu vsemi etimi tipami ob'ektov.


astro-ph/0208305 Survey for Transiting Extrasolar Planets in Stellar Systems (STEPSS): The Frequency of Planets in NGC 1245
Authors: Christopher J. Burke et al.
Comments: 4 pages, 5 figures. To appear in the ASP Conference Series: Scientific Frontiers in Research on Extrasolar Planets, eds. D. Deming and S. Seager

Seichas fakticheski kazhdyi den' poyavlyayutsya novye stat'i po ekzoplanetam. V rabote predstavleny pervye rezul'taty novogo obzora po poisku vnesolnechnyh planet (Survey for Transiting Extrasolar Planets in Stellar Systems, STEPSS). Poka naiden odin horoshii kandidat.

Eto ne edinstvennyi obzor dlya poiska planet u drugih zvezd. O nekotoryh ya uzhe pisal v proshlyh vypuskah. Zdes' zhe upomyanu eshe proekt EXPLORE (sm. astro-ph/0208355). V etom obzore naideno 4 kandidata, odnako eti rezul'taty eshe nuzhdayutsya v bolee detal'noi obrabotke.


astro-ph/0208312 The influence of Hall drift on the magnetic fields of neutron stars
Authors: R. Hollerbach, G. R\"{u}diger
Comments: 10 pages, 12 figures, Mon. Not. R. Astron. Soc., accepted

V astrofizike neitronnyh zvezd mnogo nereshennyh voprosov. Odin iz nih - zatuhanie magnitnogo polya. Molodye neitronnye zvezdy imeyut bol'shie polya, starye (millisekundnye pul'sary) - malen'kie. Znachit, vozmozhno pole zatuhaet. Odnako, po nablyudeniyam radiopul'sarov nel'zya sdelat' odnoznachnogo vyvoda o nalichii ili otsutstvii zatuhaniya. Eto otkryvaet prostor dlya teoretikov.

T.k. my dazhe ne znaem gde sosredotocheno pole (v yadre ili v kore neitronnoi zvezdy), to modelei mozhet byt' mnozhestvo. V svoei stat'e avtory rassmatrivayut pole v kore, zatuhayushee za schet omicheskih poter' (eto standartnaya kartina) plyus deistvuet hollovskii dreif. Vyvody stat'i neodnoznachny. Veroyatno, chto hollovskii dreif vse-taki uskoryaet raspad polya.


astro-ph/0208326 Expected Performance of CryoArray
Authors: R.W. Schnee, D.S. Akerib, R.J. Gaitskell
Comments: 4 pages, 2 figures. Talk at DM2002 Conference, Marina del Rey, CA, Feb 20-22, 2002

Kak uzhe otmechalos' v moih obzorah, bylo by zamechatel'no obnaruzhit' chasticy temnoi materii v laboratorii. Seichas sushestvuyut razlichnye eksperimenty. Odin iz nih zayavlyal o registracii signala. Odnako, poka net nikakoi uverenosti v tom, chto chasticy real'no zaregistrirovany. V stat'e rassmatrivaetsya set' kriodetektorov tonnogo masshtaba dlya registracii slabovzaimodeistvuyushih massivnyh chastic. Obsuzhdaetsya problema bor'by s fonom.


astro-ph/0208334 On the minimum radius of strange stars with crust
Authors: J.L. Zdunik
Comments: accepted for publication in A&A

V stat'e poluchena ocenka minimal'nogo radiusa strannoi zvezdy s koroi iz obychnogo veshestva. V zavisimosti ot razlichnyh predpolozhenii rezul'tat okazyvaetsya poryadka 4-5 km. On sootvetstvuet masse <0.1 massy Solnca.


astro-ph/0208335 Population synthesis of wide binary millisecond pulsars
Authors: B. Willems, U. Kolb
Comments: Accepted by MNRAS, 15 pages, a version with higher resolution figures can be downloaded from http://phys-ftp.open.ac.uk/pub/publications/S20020445282596/bmsp.ps.gz

Millisekundnye pul'sary mogut obrazovyvat'sya razlichnymi sposobami. V svoei rabote avtory rassmatrivayut chetyre puti obrazovaniya millisekundnyh pul'sarov v shirokih (period bolee 1 dnya) dvoinyh sistemah. Dlya sravneniya model'nyh populyacii s dannymi nablyudenii avtory ispol'zuyut raspredeleniya po orbital'nym periodam. Pri nekotoryh predpolozheniyah avtoram udaetsya dostich' horoshego soglasiya raschetov i nablyudenii. Odnako, kak oni sami ukazyvayut, ostaetsya problema s ob'yasneniem dvoinyh s periodami menee 20 dnei.


astro-ph/0208339 Subsurface magnetic fields from helioseismology
Authors: H. M. Antia
Comments: 8 pages, to appear in proceedings of IAU Coll. 188, on Magnetic Coupling of the Solar Atmosphere

Kak uzhe otmechalos', seichas gelioseismologiya daet vozmozhnost' uznat' ochen' mnogo o vnutrennem stroenii Solnca. V dannoi rabote sdelana popytka ponyat' strukturu magnitnogo polya v nedrah dnevnoi zvezdy.

Privodyatsya ocenki polya v konvektivnoi zone, a takzhe obsuzhdayutsya predely na magnitnoe pole v yadre Solnca.


astro-ph/0208343 Solar supergranulation as a wavelike phenomenon
Authors: L. Gizon, T.L. Duvall Jr., J. Schou
Comments: 8 pages, 4 figures

Na poverhnosti Solnca nablyudaetsya mnozhestvo razlichnyh struktur: pyatna, fakely, granuly, supergranuly. V obsuzhdaemoi stat'e rech' idet o prirode poslednih iz spiska.

Supergranuly imeyut razmery poryadka 30 000 km. Esli granuly (razmer poryadka 1500 km) ochevidno svyazany s konvektivnymi potokami, to s ih bOl'shimi kuzenami ne vse tak yasno i prosto. Delo v tom, chto supergranuly dovol'no bystro dvigayutsya. Eto navodit na mysl' o tom, chto oni svyazany s kakimi-to volnovymi processami. takuyu mysl' i otstaivayut avtory stat'i. Stat'ya sovsem korotkaya, poetomu tem, kto zainteresuetsya etoi problemoi, sleduet dvigat'sya po ssylkam.


astro-ph/0208345 The COMBO-17 Survey: Evolution of the Galaxy Luminosity Function from 25,000 Galaxies with 0.2 < z < 1.2
Authors: C. Wolf et al.
Comments: 35 pages, 32 figures, submitted to Astronomy & Astrophysics

Na osnove odnorodnoi vyborki avtory issleduyut evolyuciyu funkcii svetimosti galaktik. V obzore predstavleny dannye po 25 000 galaktikam s krasnymi smesheniyami mezhdu 0.2 i 1.2. Pokazano, chto golubye galaktiki s burnym zvezdoobrazovaniem stanovyatsya v chetyre raza menee mnogochislennymi na nebol'shih krasnyh smesheniyah, a galaktiki rannih tipov (krasnee, chem sovremennye Sa-galaktiki) naoborot stanovyatsya na poryadok bolee chasto vstrechayushimisya.


obzor! astro-ph/0208346 Galactic SNR candidates in the ROSAT all-sky survey
Authors: Daniel Schaudel et al.
Comments: 4 pages, 1 figures, appears in "Neutron Stars in Supernova Remnants" (ASP Conference Proceedings), eds P. O. Slane and B. M. Gaensler, 2002, p.391

Daetsya korotkii obzor nablyudenii ostatkov sverhnovyh na sputnike ROSAT. Osoboe vnimanie udelyaetsya poisku novyh ostatkov po rentgenovskim dannym (poka osnovnaya dolya ostatkov otkryta po radionablyudeniyam). Vydeleno 14 kandidatov, issledovaniya kotoryh prodolzhayutsya.


obzor! astro-ph/0208356 The Milky Way - Pulsars and Isolated Neutron Stars
Authors: W.Becker, G.G.Pavlov
Comments: 45 pages, 19 figures, Review on high energy observations of isolated Neutron Stars. To appear in "The Century of Space Science", eds. J.Bleeker, J.Geiss, M.Huber, Kluwer Academic Publishers, in press.; Original from January 2001, revised refereed version from December 2001. The paper with high resolution images can be obtained from ftp://ftp.xray.mpe.mpg.de/people/web/Becker_Pavlov.pdf

Zamechatel'nyi obzor po nablyudeniyam odinochnyh neitronnyh zvezd (kak radiopul'sarov, tak i radiotihih) v zhestkom diapazone. Dannye po rentgenovskim nablyudeniyam sushestvenno bolee polnye, chem v nashem obzore (isklyuchaya radiotihie neitronnye zvezdy). Ochen' rekomenduyu.


astro-ph/0208364 CMB limits on large-scale magnetic fields in an inhomogeneous universe
Authors: C. A. Clarkson, A. A. Coley, R. Maartens, C. G. Tsagas
Comments: 9 pages, 1 figure; uses iopart.cls

Ispol'zuya dannye po anizotropii reliktovogo izlucheniya avtory pytayutsya poluchit' ogranicheniya na krupnomasshtabnoe magnitnoe pole. Bez dopolnitel'nyh predpolozhenii predel okazyvaetsya ochen' slabym. Odnako, pri razumnyh ogranicheniyah na prostranstvennuyu neodnorodnost' udaetsya poluchit' predel na urovne nanogauss (o pervichnyh magnitnyh polyah sm. svezhuyu rabotu hep-ph/0208152).


astro-ph/0208343 Star Formation Processes versus Planet Formation Processes
Authors: Shiv S. Kumar
Comments: To be published in the Proceedings of IAU211 Symposium held at Waikoloa, Hawaii (May 2002)

Po mneniyu avtora process zvezdoobrazovaniya principial'no otlichen ot obrazovaniya planet. Esli dlya zvezd pochti vse opredelyaetsya massoi, to dlya planet sleduet uchityvat' mnozhestvo drugih parametrov. Po odnoi masse dlya malomassivnogo ob'ekta nel'zya odnoznachno opredelit' ego prirodu i istoriyu. Avtor obsuzhdaet, kak dannye o dvizhenii, vozraste, sostave atmosfery i t.p. pomogayut ponyat' mehanizm obrazovaniya planet.



Arhiv statei, voshedshih v predydushie vypuski.

Razdely arhiva (s iyulya 2002 g.):
obzory, kosmologiya, neitrino, kosmicheskie luchi i gamma-astronomiya, galaktiki, AYaG, kvazary, nasha Galaktika, mezhzvezdnaya sreda, zvezdy, sverhnovye, ostatki sverhnovyh, chernye dyry, neitronnye zvezdy, linzirovanie, Solnce, ekzoplanety, Solnechnaya sistema, akkreciya, tesnye dvoinye sistemy, gamma-vspleski, gravitacionnye volny, mehanizmy izlucheniya, chislennoe modelirovanie, metody obrabotki dannyh, MGD, metody nablyudenii, budushie nablyudatel'nye proekty, prochee.


Poleznye astronomicheskie ssylki.
Obzornye stat'i v astro-ph s 2001 g.

Sergei Popov

Obsudit' na forume


Na glavnuyu stranicu

Publikacii s klyuchevymi slovami: elektronnye preprinty - obzory - astro-ph
Publikacii so slovami: elektronnye preprinty - obzory - astro-ph
Sm. takzhe:
Vse publikacii na tu zhe temu >>

Ocenka: 2.2 [golosov: 21]
 
O reitinge
Versiya dlya pechati Raspechatat'

Astrometriya - Astronomicheskie instrumenty - Astronomicheskoe obrazovanie - Astrofizika - Istoriya astronomii - Kosmonavtika, issledovanie kosmosa - Lyubitel'skaya astronomiya - Planety i Solnechnaya sistema - Solnce


Astronet | Nauchnaya set' | GAISh MGU | Poisk po MGU | O proekte | Avtoram

Kommentarii, voprosy? Pishite: info@astronet.ru ili syuda

Rambler's Top100 Yandeks citirovaniya