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  • 17.02.2006. Krutyatsya diski
  • 15.02.2006. Inye temnye galaktiki
  • 08.02.2006. Massivnoe skoplenie krasnyh sverhgigantov
  • 30.01.2006. Rentgenovskie istochniki v centre Galaktiki
  • 27.01.2006. Samaya malen'kaya ekzoplaneta

    Soderzhanie i bystryi perehod k razdelam obzora


    Stat'i nedeli
    "Luchshie iz luchshih"

  • hep-th/0602091
    Zaselenie peizazha
  • astro-ph/0602271
    Vozmushennye odinochnye galaktiki: indikatory populyacii temnyh galaktik?
  • astro-ph/0602280
    Filosofiya kosmologii

    Otdel'nye stat'i
  • Sotrudnichestvo professionalov i lyubitelei i AAVSO
  • Zaselenie peizazha
  • Neustoichivosti vrashayushihsya kompaktnyh zvezd: kratkii obzor
  • Vozmushennye odinochnye galaktiki: indikatory populyacii temnyh galaktik?
  • Filosofiya kosmologii
  • Gazovye planety, protozvezdy i molodye burye karliki: rozhdenie i sud'ba
  • HST/ACS mnogocvetnoe koronograficheskoe izobrazhenie ostatochnogo diska vokrug Beta Zhivopisca
  • 2.5-metrovyi teleskop Sloanovskogo Cifrovogo Obzora Neba
  • Retrodukciya, gipotezy mul'tiversa i ih proveryaemost'
  • Magnitary kak postoyannye istochniki zhestkogo rentgena: Otkrytie zhestkogo hvosta u SGR 1900+14 na Integrale
  • Nablyudatel'nye ogranicheniya na kosmicheskuyu reionizaciyu


    Iz razdela physics
  • CERN - rabotayushii primer global'noi nauchnoi kollaboracii


    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 2001-2003 gg.
  • Obzory preprintov astro-ph

    Vypusk N128
    astro-ph za 13 - 20 fevralya 2006 goda: izbrannye stat'i

    Referaty otdel'nyh statei



    miniobzor astro-ph/0602244 Sotrudnichestvo professionalov i lyubitelei i AAVSO (Pro-Am Collaboration and the AAVSO)
    Authors: Arne A. Henden
    Comments:15 pages, 10 figures, 2006, ASPC 349, 165

    Opisany primery sotrudnichestva professionalov i lyubitelei po opytu AAVSO. Istoriya nachinaetsya azh s 19 veka, kogda Louvell priglasil na rabotu Slaifera (lyubitel' priglasil professionala, kstati). Odnako osnovnoe vnimanie udelyaetsya, konechno, bolee blizkomu k nam vremeni.

    Obsuzhdaetsya, kak mozhno sdelat' sotrudnichestvo bolee plodotvornym.


    hep-th/0602091 Zaselenie peizazha (Populating the Landscape: A Top Down Approach)
    Authors: S.W. Hawking, Thomas Hertog
    Comments: 22 pages, 1 figure

    Interesnaya stat'ya, posvyashennaya vazhnoi idee. Otmechu, chto matematikoi stat'ya ne peregruzhena.

    V teorii strun est' ponyatie "peizazh" (landscape). Ono svyazano s tem, chto teoriya predstavlyaet ogromnyi vybor parametrov dlya, grubo govorya, sozdaniya Vselennoi. Parametry opredelyayut svoistva vakuuma. Nam, konechno, hochetsya ponyat', kak poluchit' "nash" vakuum s malen'koi kosmologicheskoi postoyannoi i t.p. Naprimer, mozhno ispol'zovat' antropnyi podhod (on takzhe obsuzhdaetsya v stat'e). Odnako stat'ya ne sovsem o tom, kak vybrat' pravil'nye parametry iz mnozhestva vozmozhnyh. avtory rassuzhdayut, kak v takoi teorii stroit' kosmologiyu.

    Predlagaetsya podhod "sverhu vniz" (top down). Eto vyrazhenie oznachaet, chto "plyashem ne ot pechki", a "k pechke". T.e., ne iz znaniya nachal'nyh parametrov vyvodim konechnye, a, v nekotorom smysle, naoborot. V sluchae kosmologii v podhode "snizu vverh" (bottom-up) nado zadat' nachal'noe sostoyanie i iz nego vyvesti to, chto my seichas nablyudaem. Etot podhod ochen' trudno realizovat'. Ved' v kosmologii, vo-pervyh, my ploho predstavlyaem sebe nachal'nye usloviya, a vo-vtoryh, my imeem nablyudaemuyu vselennuyu v kolichestve 1 (odna) shtuka. Da i to, nablyudaem ee ne vsyu, a lish' nekotoruyu chast'. Poetomu Houking i Hertog predlagayut ispol'zovat' top-down. Neobhodimo provodit' raschet vseh al'ternativnyh istorii, kotorye privodyat k takomu zhe konechnomu sostoyaniyu. T.e. v nekotorom smysle beretsya summa po vsem vozmozhnym nachal'nym usloviyam s posleduyushim analizam vklada teh istorii, kotorye privodyat k nablyudaemoi kartine. Velichiny veroyatnostei takih istorii smogut pomoch' ponyat', kakie svoistva nashei Vselennoi svyazany s fundamental'nymi zakonami, a kakie - so sluchainymi kvantovymi processami.


    obzor astro-ph/0602234 Neustoichivosti vrashayushihsya kompaktnyh zvezd: kratkii obzor (Instabilities of rotating compact stars: a brief overview)
    Authors: L. Villain
    Comments: 19 pages, Proceeding of Cargese School "Astrophysical fluid dynamics" (May 2005) organized by B. Dubrulle and M. Rieutord in honour of J.-P. Zahn and S. Bonazzola

    Podrobnyi, ponyatnyi i interesnyi obzor, posvyashennyi neustoichivostyam v neitronnyh zvezdah i rodstvennyh im ob'ektah. Takie neustoichivosti budut privodit' k generacii gravitacionnyh voln. Otsyuda termin "gravitacionno-volnovaya astroseismologiya". Pravda, registraciya takih kolebanii - delo budushego.


    astro-ph/0602271 Vozmushennye odinochnye galaktiki: indikatory populyacii temnyh galaktik? (Disturbed isolated galaxies: indicators of a dark galaxy population?)
    Authors: I.D.Karachentsev, V.E.Karachentseva, W.K.Huchtmeier
    Comments: 5 pages, 1 figure. Astronomy and Astrophysics, accepted

    Kak izvestno, galaktiki chasto vstrechayutsya gruppami ili hotya by parami. Pri etom gravitacionnoe pole odnoi galaktiki narushaet (vozmushaet) strukturu drugoi. Est' mnogo izvestnyh primerov takih galaktik. Naprimer, izvestnaya galaktika M51 ("Vodovorot"), galaktika "Antenna" i mnogie-mnogie drugie. Odnako ne vsegda "vozmushayushii agent" mozhet byt' nablyudaem!

    Avtory proveli poisk odinochnyh vozmushennyh galaktik. Proanalizarovav izobrazheniya polutora tysyach galaktik, avtory obnaruzhili devyat' primerov togo, chto iskazhenie struktury nablyudaetsya, a prichina iskazheniya - vtoraya galaktika - ne vidna.

    Chto zhe tak vozmutilo galaktiki? Igor' Karachencev iz Special'noi astrofizicheskoi observatorii i ego soavtory polagayut, chto prichinoi stali "temnye galaktiki". Obychnye galaktiki sostoyat iz obychnogo veshestva (iz kotorogo sostoyat svetyashiesya zvezdy) i temnoi materii. Prichem, vklad temnoi materii v obshuyu massu mozhet prevoshodit' vklad svetyasheisya materii. Vpolne vozmozhna situaciya, kogda svetyashegosya veshestva ochen' malo, a temnoi materii- mnogo. Togda-to i mozhno govorit' o temnoi galaktike.

    Esli gipoteza, vyskazyvaemaya v obsuzhdaemoi stat'e verna, to dolya temnyh galaktik sostavlyaet poryadka 5 procentov ot populyacii normal'nyh galaktik. Eto ne tak uzh i malo!


    Vosem' odinochnyh vozmushennyh galaktik. Snimki iz "Ocifrovannogo obzora neba Instituta Kosmicheskogo teleskopa" (STScI DSS). Razmer polya zreniya 8 na 6 uglovyh minut.

    Pochitat' pro eto mozhno takzhe na Elementah.ru.


    obzor astro-ph/0602280 Filosofiya kosmologii (Issues in the Philosophy of Cosmology)
    Authors: George F. R. Ellis
    Comments: 60 pages, To appear in the Handbook in Philosophy of Physics, Ed J Butterfield and J Earman (Elsevier, 2006)

    Vsem chitat'! 60 stranic vazhnogo i interesnogo teksta.


    obzor astro-ph/0602291 Gazovye planety, protozvezdy i molodye burye karliki: rozhdenie i sud'ba (Gaseous Planets, Protostars And Young Brown Dwarfs : Birth And Fate)
    Authors: G. Chabrier et al.
    Comments: Invited Review, Protostars and Planets V (Hawai, October 2005)

    Podrobnyi obzor, posvyashennyi tematikam, privedennym v nazvanii. Rekomenduyu.


    astro-ph/0602292 HST/ACS mnogocvetnoe koronograficheskoe izobrazhenie ostatochnogo diska vokrug Beta Zhivopisca (HST/ACS Multiband Coronagraphic Imaging of the Debris Disk around Beta Pictoris)
    Authors: D. A. Golimowski et al.
    Comments: 38 pages (including 21 figures and 4 tables)

    Po dannym mnogocvetnyh nablyudenii na Kosmicheskom teleskope podtverzhdena slozhnaya struktura diska vokrug zvezdy Beta Zhivopisca. Nablyudeniya provodilis' s pomosh'yu koronografa, chtoby ubrat' meshayushii svet samoi zvezdy. Eto samye detal'nye dannye po okolozvezdnym diskam na masshtabe 30-300 a.e. ot central'noi zvezdy.


    Snimki sdelany na Kosmicheskom teleskope. Razmer izobrazheniya 29 na 10 uglovyh sekund. Na dvuh verhnih snimkah pokazan disk vokrug Beta Zhivopisca. Na nizhnem - zvezda sravneniya - Al'fa Zhivopisca. PSF feature - tehnicheskii defekt koronografa, proishozhdenie kotorogo poka neizvestno. Vidno, chto PSF detal' ne menyaet svoego polozheniya pri izmenenii orientacii teleskopa, a disk (sravnite dva verhnih izobrazheniya) - menyaet.

    Pokazano, chto vnutrennyaya chast' struktury vokrug zvezdy predstavlyaet soboi otdel'nyi disk, naklonennyi pod uglov okolo 5 gradusov po otnosheniyu k vneshnemu (osnovnomu) disku. Dva diska ili imeyut raznyi sostav granul (grains), ili raznoe raspredelenie granul po razmeru.


    Pokazano obrabotannoe izobrazhenie (cveta uslovnye), na kotorom viden vnutrennii disk, naklonennyi k vneshnemu. Izobrazhenie v central'noi chasti iskazheno pri ubiranii sveta zvezdy.


    astro-ph/0602326 2.5-metrovyi teleskop Sloanovskogo Cifrovogo Obzora Neba (The 2.5 m Telescope of the Sloan Digital Sky Survey)
    Authors: James E. Gunn et al.
    Comments: 87 pages, 27 figures. AJ (in press, April 2006)

    Podrobneishee opisanie teleskopa, vot uzhe 6 let ispol'zuemogo v Sloanovskom obzore. Eto instrument sistemy Richi-Kret'ena s dostatochno bol'shoi svetosiloi. Optimizaciya v osnovnom zaklyuchalas' v poluchenii vysokogo kachestva izobrazhenii i snizhenii stoimosti.


    astro-ph/0602356 Retrodukciya, gipotezy mul'tiversa i ih proveryaemost' (Retroduction, Multiverse Hypotheses and Their Testability)
    Authors: William R. Stoeger
    Comments: 12 PAGES

    Polufilosofskoe esse o kosmologii.

    Nachnem s togo, chto dazhe pervoe slovo v zagolovke nuzhdaetsya v kommentariyah. Zabavno, chto ni odin slovar' pod rukoi slovo retroduction ne potyanul. Zato potyanula Wikipedia. Termin byl vveden Pirsom. Po suti eto termin iz metodologii nauki, oznachayushii umozaklyuchenie ot sledstviya k posylke.

    Osnovnaya tema stat'i: kak mozhno proverit' gipotezu(y) o mul'tiversah pri tom, chto sami mul'tiversy my, skoree vsego, nikogda neposredstvenno pronablyudat' ne smozhem.


    astro-ph/0602359 Magnitary kak postoyannye istochniki zhestkogo rentgena: Otkrytie zhestkogo hvosta u SGR 1900+14 na Integrale (Magnetars as persistent hard X-ray sources: INTEGRAL discovery of a hard tail in SGR 1900+14)
    Authors: D. Gotz, S. Mereghetti, A. Tiengo, P. Esposito
    Comments: 5 pages, 2 figures, submitted to A&A Letters

    Sputnik Integral horosh ne tol'ko tem, chto on rabotaet v ochen' zhestkom rentgenovskom diapazone, gde do nego takih instrumentov ne bylo. Horosh on eshe i tem, chto, obladaya shirokim polem zreniya, on pozvolyaet poluchat' ochen' dlitel'nye ekspozicii, osobenno dlya istochnikov, lezhashih v oblasti galakticheskogo centra. Tak vot, po dannym 2.5 millionov sekund nablyudenii (!) otkryto postoyannoe zhestkoe izluchenie ot odnogo iz MPG - SGR 1900+14.

    Sushestvennym otkrytiem avtorov stalo to, chto anomal'nye rentgenovskie pul'sary sushestvenno otlichayutsya ot MPG v zhestkom diapazone spektra (1-100 keV).


    obzor astro-ph/0602375 Nablyudatel'nye ogranicheniya na kosmicheskuyu reionizaciyu (Observational constraints on Cosmic Reionization)
    Authors: Xiaohui Fan et al.
    Comments: to appear in ARAA 2006. latex. 84 pages. 15 figs

    Stadiya reionizacii zanimaet vazhnoe mesto v istorii Vselennoi. Napomnyu, chto sut' v tom, chto, kogda poyavilis' pervye moshnye istochniki izlucheniya, to oni snova ionizovali znachitel'nuyu chast' vselennoi (vse eto, razumeetsya, proishodilo posle rekombinacii). Chto eto byli za istochniki, i kogda proizoshla reionizaciya - neyasno.

    Avtory akkrutano rassmatrivayut kompleks dannyh, svyazannyh s reionizaciei. Zachastuyu zhestkie vyvody o momente etoi stadii delayut na osnovanii dannyh WMAP po reliktovomu fonu. Na samom dele, tut nuzhna ostorozhnost'. Pochemu - uznaite iz obzora.



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

    physics/0602099 CERN - rabotayushii primer global'noi nauchnoi kollaboracii (CERN, a working example of global scientific collaboration)
    Authors: J. Schukraft
    Comments: Invited talk at the international meeting 'South-South and North-South Collaboration in Science and Technology', Islamabad, Pakistan, 12-13 March 2004; 3 pages, no figures

    Kak izvestno, CERN - odin iz krupneishih primerov internacional'nyh nauchnyh kollaboracii, davshii mnogo chego poleznogo (naprimer, Internet). V ochen' korotkom doklade na konferencii, posvyashennoi nauchnomu sotrudnichestvu, dano opisanie Cerna s tochki zreniya sovmestnoi raboty sodruzhestva uchenyh.


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