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

Obzoram ispolnyaetsya dva goda!!


Zhurnal "Fizika" - proekt RSCI


Podpiska na rassylku obzorov astro-ph na Subscribe.Ru





  • 26.06.2004. Molodoe zvezdnoe skoplenie NGC 7129: Perepis' zvezd
  • 17.06.2004. Nablyudeniya Yupitera na XMM-Newton
  • 15.06.2004. Novaya obrabotka glubokogo habblovskogo snimka

    Soderzhanie i bystryi perehod k razdelam obzora


    Stat'i nedeli
    "Luchshie iz luchshih"

  • astro-ph/0406573
    SB9: Devyatyi katalog orbit spektral'nyh dvoinyh

  • astro-ph/0406629
    RefSponse: Sistema ocenki literatury dlya soobshestva astronomov-professionalov


    Otdel'nye stat'i
  • Samye massivnye zvezdy v Mestnoi gruppe: tochnoe izmerenie mass zvezd v zatmennyh dvoinyh
  • Forma galo Mlechnogo Puti i prilivnye hvosty ego sputnikov
  • "Fabrika sverhnovyh" v slivayusheisya sisteme Arp 299
  • Orbital'nyi period ul'trakompaktnoi malomassivnoi rentgenovskoi dvoinoi sistemy 4U1543-624
  • Akkrecionnyi disk vokrug chernoi dyry s uchetom magnitnyh polei
  • Analiz pul'sacii yader massivnyh zvezd v svyazi c pul'sarnymi kikami
  • Radiopul'sary
  • Ochen' molodoi radiopul'sar J1357-6429
  • Nablyudenie dalekih sverhnovyh na Habblovskom teleskope: do z=1.6
  • Ekologiya chernyh dyr v zvezdnyh skopleniyah
  • SB9: Devyatyi katalog orbit spektral'nyh dvoinyh
  • Tri novyh rentgenovskih pul'sara v Malom Magellanovom Oblake
  • RefSponse: Sistema ocenki literatury dlya soobshestva astronomov-professionalov


    Iz razdela physics
  • Vsemirnaya kosmicheskaya ul'trafioletovaya observatoriya
  • Razvitie fundamental'nyh nauk o kosmose v mire


    Polnyi Arhiv predydushih vypuskov.

    Arhiv statei, voshedshih v vypuski s 01 iyulya 2002 g. po 31 marta 2003 g.

    Razdely arhiva (s aprelya 2003 g.):
    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,
    dinamika, mehanika
    metody obrabotki dannyh,
    MGD,
    metody nablyudenii,
    budushie nablyudatel'nye proekty,
    prochee.


    Poleznye astronomicheskie ssylki.
    Korotkoe esse ob elektronnyh preprintah.
    Obzornye stat'i v astro-ph s 2001 g.
  • Obzory preprintov astro-ph

    Vypusk N81
    astro-ph za 20 - 30 iyunya 2004 goda: izbrannye stat'i

    Referaty otdel'nyh statei


    astro-ph/0406411 Samye massivnye zvezdy v Mestnoi gruppe: tochnoe izmerenie mass zvezd v zatmennyh dvoinyh (The Most Massive Stars in the Local Group: Measuring Accurate Masses of Stars in Eclipsing Binaries)
    Authors: Alceste Z. Bonanos, Krzysztof Z. Stanek
    Comments: Invited contribution, to appear in "Fate of the Most Massive Stars", R. M. Humphreys and K. Z. Stanek, eds, ASP Conference Series

    Tochnye izmereniya mass zvezd vozmozhny tol'ko v dvoinyh sistemah. Prichem, dazhe v sluchae dvoinoi mozhet byt' odin vazhnyi neopredelennyi parametr - naklon orbity k luchu zreniya. Situaciya uproshaetsya v zatmennyh dvoinyh: tam my nahodimsya v ploskosti orbity. Imenno takie sistemy dayut naibolee tochnye izmereniya mass.

    V dannoi stat'e avtory opisyvayut izmereniya mass naibolee tyazhelyh zvezd, tochnee teh massivnyh zvezd, dlya kotoryh polucheny tochnye dannye. Poka rekordsmenami yavlyayutsya dve zvezdy s massami bolee 80 mass Solnca.


    astro-ph/0406416 Forma galo Mlechnogo Puti i prilivnye hvosty ego sputnikov (The Shape of the Milky Way Halo and the Satellite Tidal Tails)
    Authors: M.A. Gomez-Flechoso
    Comments: 4 pages, 2 figures

    Karlikovye galaktiki-sputniki Mlechnogo Puti ispytyvayut s ego storony ochen' sil'noe prilivnoe vozdeistvie, v rezul'tate kotorogo iz nih vytyagivayutsya strui veshestva, nazyvaemye "prilivnymi hvostami".

    Avtory dannoi raboty predlozhili po forme i raspredeleniyu "hvostov" u sputnikov ustanovit' formu nashei Galaktiki (tochnee ee gravitacionnogo potenciala). Rezul'tat okazalsya vpolne ozhidaemym: galo - splyusnutyi ellipsoid s otnosheniem osei 0.8-0.9. Eto znachenie horosho soglasuetsya s poluchennymi ranee, no ono opredeleno nezavisimym sposobom.


    astro-ph/0406421 "Fabrika sverhnovyh" v slivayusheisya sisteme Arp 299 (A Supernova Factory in the Merger System Arp 299)
    Authors: S. G. Neff, J. S. Ulvestad, and S. H. Teng
    Comments: 22 pages, 10 figures. accepted to ApJ

    Blizkaya k nam galaktika Arp 299 nedavno obrazovalas' iz dvuh drugih v rezul'tate sliyaniya. Iz-za etogo v nei seichas idet ochen' moshnoe zvezdoobrazovanie. Sverhnovye tam vspyhivayut s chastotoi odin raz a god - odin raz v 10 let (a oni obrazuyutsya iz zvezd s massoi bol'she 10Mo, kotoryh malo).

    Dannyi ob'ekt nablyudalsya v radio (na VLA) i v infrakrasnom diapazone, polucheny interesnye rezul'taty.


    astro-ph/0406465 Orbital'nyi period ul'trakompaktnoi malomassivnoi rentgenovskoi dvoinoi sistemy 4U1543-624 (The Orbital Period of the Ultracompact Low-Mass X-Ray Binary 4U1543-624)
    Authors: Z. Wang and D. Chakrabarty
    Comments: 4 pages, submitted to ApJ

    Orbital'nyi period dannoi sistemy byl opredelen po fotometricheskim nablyudeniyam (cherez postroenie krivoi bleska) na 6.5-m teleskope Magellan II v Chili. Etot period sostavil

    18.2+/-0.1 min.

    Esli, kak predpolagalos' ranee, eta sistema sostoit iz neitronnoi zvezdy, na kotoruyu istekaet zapolnyayushii polost' Rosha belyi karlik, to ego radius dolzhen sostavlyat' 0.03 Ro, a massa, sootvetstvenno, 0.03 Mo.


    obzor astro-ph/0406466 Akkrecionnyi disk vokrug chernoi dyry s uchetom magnitnyh polei (Accretion disks around black holes with account of magnetic fields)
    Authors: G.S. Bisnovatyi-Kogan
    Comments: 24 pages, 18 figures.

    Esli akkreciruyushee veshestvo neset vmorozhennoe v sebya magnitnoe pole, to davlenie polya rastet bystree, chem davlenie samogo veshestva. I esli v nachale pole ne bylo ochen' ochen' slabym, to mozhet nastupit' moment, kogda osnovnuyu rol' v dinamike akkrecii stanut igrat' imenno magnitnye polya. Teoriya dannyh processov otlichaetsya ot togo, chto predskazyvaet kak standartnaya al'fa-model', tak i modeli advekcionnyh diskov.


    Shematichnoe izobrazhenie struktury diska s magnitnym polem

    V obzore podrobno rassmotreny vse aspekty dannoi teorii.


    astro-ph/0406521 Analiz pul'sacii yader massivnyh zvezd v svyazi c pul'sarnymi kikami (Pulsational Analysis of the Cores of Massive Stars and its Relevance to Pulsar Kicks)
    Authors: Jeremiah Murphy et al.
    Comments: 32 pages including 12 color figures and 2 tables, submitted to ApJ

    "Mnogo divnogo na svete ..."
    Mnogo neponyatnogo v svyazi s rozhdeniem neitronnyh zvezd. V chastnosti, neizvestno po kakoi takoi prichine eti ob'ekty priobretayut gigantskie skorosti. Prichem, raspredelenie po skorostyam dovol'no hitroe, sostoyashee iz dvuh komponent. V pervom pike s maksimumom na 12-130 km/s nahoditsya okolo treti zvezd. Vo vtorom (s maksimumom na 700 km/s) - ostal'nye dve treti. Kak poluchit' takuyu bimodal'nost' i stol' bol'shie skorosti dlya dvuh tretei neitronnyh zvezd - neyasno.

    Naibolee prorabotannoi model'yu vzryva sverhnovoi yavlyaetsya gidrodinamicheskaya. Sdelat' tam bol'shie skorosti (do 1000 km/s) dovol'no trudno (hotya Scheck et al. smogli poluchit' skorosti vyshe 500 km/s). V 1997 g. gruppa avtorov (Goldreich et al.) predpolozhili, chto iznachal'naya asimmetriya mozhet byt' svyazana s neustoichivostyami yadra zvezdy-predsverhnovoi. V etoi stat'e Merfi i dr. issleduyut v detalyah takie neustoichivosti.

    Osnovnoi vyvod takov: harakternoe vremya rosta neustoichivostei slishkom veliko, chtoby uspet' kak-to sushestvenno povliyat' na vzryv.

    Esli vse-taki tak i ne udastsya poluchit' vysokie skorosti v gidrodinamicheskoi modeli, to eto budet ser'eznoi problemoi ....


    dissertaciya astro-ph/0406522 Radiopul'sary (Radio Pulsars)
    Authors: Joeri van Leeuwen
    Comments: PhD Thesis, Utrecht University 2004, with a summary in Dutch. 108 pages, 55 low-resolution figures. High-resolution versions are available at http://www.astro.uu.nl/~jleeuwen/phd_thesis/

    Interesno sravnivat' dissertacii v raznyh stranah i universitetah. Oni ochen' raznye. Prakticheski vse raboty, vypolnennye v Niderlandah, kotorye nam popadalis' imeyut ochen' prostoi vid: eto prosto slozhennye poporyadku neskol'ko original'nyh statei, plyus nebol'shoe vvedenie. Imenno tak i vyglyadit dannyi trud: 4 stranicy vvedeniya i sem' statei. Stat'i dovol'no interesnye.


    astro-ph/0406528 Ochen' molodoi radiopul'sar J1357-6429 (The Very Young Radio Pulsar J1357-6429)
    Authors: F. Camilo et al.
    Comments: Accepted for publication in ApJ Letters; 6 pages, 2 included EPS figures

    V rezul'tate prodolzhayusheisya obrabotki dannyh Parksovskogo obzora otkryt eshe odin interesnyi radiopul'sar. J1357-6429 nahoditsya na rasstoyanii 2.5 kpk ot nas i vhodit v desyatku samyh molodyh pul'sarov. Vozrast ocenen v 7300 let (napomnim, chto eta velichina poluchaetsya deleniem poloviny nablyudaemogo perioda na temp zamedleniya). U etogo pul'sara uzhe obnaruzhen glitch (t.e. sboi perioda), chto podtverzhdaet ego molodost'. Ryadom s pul'sarom est' ostatok sverhnovoi G309.8-2.6.


    astro-ph/0406546 Nablyudenie dalekih sverhnovyh na Habblovskom teleskope: do z=1.6 (The Hubble Higher-Z Supernova Search: Supernovae to z=1.6 and Constraints on Type Ia Progenitor Models)
    Authors: L.-G. Strolger et al
    Comments: 32 pages, 15 figures, accepted in ApJ

    Dlya programmy "poisk sverhnovyh na bol'shih z" Habblovskii teleskop provel pyat' seansov nablyudenii oblasti ploshad'yu 300 kvadratnyh minut s intervalami v 45 dnei. Sravnenie snimkov pozvolilo naiti 42 sverhnovye na krasnyh smesheniyah 0.2 < z < 1.6 (s bleskom do 26 velichiny v fil'tre z').


    Nekotorye iz obnaruzhennyh Sverhnovyh

    Sravnenie dannyh rezul'tatov s model'nymi raschetami pozvolyaet sdelat' interesnye vyvody.

    Voprosu ocenki tempa vspyshek dalekih sverhnovyh posvyashena stat'ya astro-ph/0406547 togo zhe nauchnogo kollektiva.


    obzor astro-ph/0406550 Ekologiya chernyh dyr v zvezdnyh skopleniyah (The Ecology of Black Holes in Star Clusters)
    Authors: Simon Portegies Zwart
    Comments: 71 pages, 25 figures.

    Eto obzornaya lekciya, kotoraya na bumage vyglyadit kak glava iz knigi. Nazvanie, sformulirovannoe v "poetichnoi" forme, oznachaet, chto obzor posvyashen voprosam dinamicheskoi evolyucii chernoi dyry v skopleniyah zvezd i ee nablyudatel'nym proyavleniyam. V nem rassmotreny sleduyushie temy:

    • relaksaciya zvezdnyh sistem;
    • evolyuciya bogatyh zvezdnyh skoplenii bez chernyh dyr;
    • obrazovanie chernyh dyr v skopleniyah;
    • rost ih massy;
    • chislennoe modelirovanie;
    • chernye dyry kak rentgenovskie istochniki;
    • chernye dyry kak istochniki gravitacionnyh voln.


    astro-ph/0406573 SB9: Devyatyi katalog orbit spektral'nyh dvoinyh (SB9: The Ninth Catalogue of Spectroscopic Binary Orbits)
    Authors: D.Pourbaix, A.A. Tokovinin et al.
    Comments: 6 pages, 6 figures, acceptev in A&A

    Orbity dvoinyh sistem chashe vsego opredelyayut dvumya sposobami: dlya shirokih vizual'nyh dvoinyh - po izmeneniyu rasstoyaniya i polozheniya razdelennyh komponentov, dlya tesnyh spektral'nyh dvoinyh - po doplerovskomu sdvigu spektral'nyh linii komponentov sistemy.

    Stal dostupnym devyatyi katalog orbit spektral'nyh dvoinyh, v nem privedeny dannye o 2386 dvoinyh zvezdah.


    Raspredelenie spektral'nyh dvoinyh po periodam (v dnyah):
    tolstaya liniya - sistemy s odnim spektrom, tonkaya - s dvumya.


    astro-ph/0406580 Tri novyh rentgenovskih pul'sara v Malom Magellanovom Oblake (Three new X-ray pulsars detected in the Small Magellanic Cloud and the positions of two other known pulsars determined)
    Authors: W.R.T.Edge et al.
    Comments: Accepted by MNRAS

    Korotko: po dannym RXTE v Malom Magellanovom Oblake zaregistrirovany eshe tri rentgenovskih pul'sara. Ih periody: 34, 503 i 138 sekund.


    astro-ph/0406629 RefSponse: Sistema ocenki literatury dlya soobshestva astronomov-professionalov (RefSponse: A Literature Evaluation System for the Professional Astrophysics Community)
    Authors: Robert E. Rutledge
    Comments: 10 pages

    Zapustili ochen' interesnuyu sistemu. Ideya primerno takaya zhe kak u AstroTopa, tol'ko prednaznachena sistema dlya ocenki statei po astronomii samimi astronomami-professionalami.

    Nahoditsya sistema zdes'. Ideya ee primerno takova:
    Professional'nye astronomy registriruyutsya v sisteme i nachinayut ocenivat' stat'i po 20-ball'noi shkale. Odnako daleko ne srazu ih ocenki nachinayut vliyat' na reiting stat'i. Dlya togo, chtoby eto proizoshlo neobhodimo vypolnenie neskol'kih uslovii:
    1. Tri stat'i, gde ocenivayushii uchenyi yavlyaetsya soavtorom, dolzhny poluchit' kak minimum tri ocenki ot treh razlichnyh pol'zovatelei.
    2. U ocenivayushego uchenogo dolzhno byt' bolee 10 vystavlennyh im ocenok za poslednii god.

    Esli my pravil'no razobralis', to est' odno interesnoe uslovie. Zadan kak by obshii vid raspredeleniya ocenok, poetomu ocenivayushii ne mozhet nachat' vystavlyat' ochen' vysokie bally. Esli hotite postavit' komu-to vysokii ball (a 3 schitaetsya uzhe vysokim), to nado budet umen'shat' bally vashih ocenok drugim stat'yam! Srednii ball dolzhen byt' 2.25 (ne vyshe). T.o. ocenivayushie budut stimulirovany peresmatrivat' svoi starye ocenki.

    Krome togo, "ves" ocenki zavisit ot "massy" ocenivayushego: uchenye, ch'i stat'i poluchili v sisteme vysokii reiting, budut imet' bOl'shii statisticheskii ves, t.e. smogut sil'nee vliyat' na reitingi drugih statei.

    Sistema tol'ko nachala rabotat', poetomu poka ocenok i uchastnikov nemnogo. Posmotrim, chto iz etogo vyidet.

    Poka yavno tam ne hvataet deleniya po razdelam (kak po oblasti issledovanii, tak i po tipu stat'i: obzor ili net).



    My budem starat'sya hotya by perechislit' interesnye (dlya shirokoi publiki) stat'i, poyavivshiesya v razdele physics (vklyuchaya cross-listing).


    physics/0406116 Vsemirnaya kosmicheskaya ul'trafioletovaya observatoriya (World Space Observatory/Ultraviolet (WSO/UV): Progress Report)
    Authors: W. Wamsteker, H.J. Haubold
    Comments: 4 pages

    Ideya vsemirnyh kosmicheskih observatorii razvivaetsya pod egidoi OON. Sut' sostoit v tom, chtoby vse strany mogli uchastvovat' v proekte, pri etom, razumeetsya, nebogatye strany dolzhny kak-to izbezhat' bol'shih finansovyh zatrat. Osnovnym partnerom OON yavlyaetsya Evropeiskoe Kosmicheskoe Agenstvo (ESA).

    Ul'rafioletovaya missiya planiruetsya s 1.7-metrovym teleskopom. Osnovnye celi tipichny dlya normal'noi ul'trafioletovoi programmy.

    Trudno skazat' horosha ideya ili ploha. Esli rassmatrivat' tol'ko nauchnuyu sostavlyayushuyu, to dumaetsya, chto proekt ne iz luchshih. Yasno, chto budut dopolnitel'nye problemy organizacionnogo plana, kotoryh ne byvaet, esli v proekte uchastvuyut tol'ko "kosmicheskie" strany. Krome togo, yasno, chto vremya i dannye budut raspredelyat'sya ne proporcional'no nauchnym vozmozhnostyam kollektivov i otdel'nyh uchenyh. S drugoi storony, proekt ne stavit pered soboi lish' nauchnye zadachi. Smysl proekta ne tol'ko v poluchenii rezul'tatov v astronomii, no i razvitie nauki v stranah, gde seichas s etim ne vse blagopoluchno.

    physics/0406117 Razvitie fundamental'nyh nauk o kosmose v mire (Developing Basic Space Science World Wide: Progress Report)
    Authors: W. Wamsteker, H.J. Haubold
    Comments: 3pages

    Korotkaya zametka, v kotoroi privoditsya koe-kakaya lyubopytnaya statistika. Pereskazyvat' ne budem - chitaite.


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

    Ocenka: 2.3 [golosov: 19]
     
    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