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  • 06.05.2005. Dalekoe kol'co Einshteina
  • 07.04.2005. Disk vokrug Vegi
  • 26.03.2005. Ten' Luny
  • 23.03.2005. Novyi rentgenovskii pul'sar v ostatke sverhnovoi
  • 22.03.2005. Eshe o blinnoi teorii ...

    Soderzhanie i bystryi perehod k razdelam obzora


    Stat'i nedeli
    "Luchshie iz luchshih"

  • astro-ph/0507147
    Pozdnie radionablyudeniya 74 sverhnovyh tipa Ibc: sil'nye ogranicheniya na vneosevye gamma-vspleski

  • astro-ph/0507394
    Identifikaciya krasnogo giganta, porodivshego sverhnovuyu 2005cs

  • astro-ph/0507420
    Massa millisekundnogo pul'sara


    Goryachie temy nedeli

  • Auger, HiRes, Veritas & Co.


    Otdel'nye stat'i
  • Vspyshka i kratkovremennoe uvelichenie pul'siruyushego potoka ot kandidata v magnitary 1E 1048.1-5937
  • Yarkostnoe ogranichenie na modeli ostyvaniya molodyh neitronnyh zvezd
  • Effekty sredy v ohlazhdenii neitronnyh zvezd i 3P2 neitronnaya shel'
  • Obrazovanie pervyh svetyashihsya ob'ektov
  • Pozdnie radionablyudeniya 74 sverhnovyh tipa Ibc: sil'nye ogranicheniya na vneosevye gamma-vspleski
  • Sputnik ASTRO-F: infrakrasnyi obzor bol'shih ploshadei
  • Massa neitronnoi zvezdy v SMC X-1
  • Zvezdnaya evolyuciya s vrasheniem XIII: temp gamma-vspleskov na raznyh z
  • Neitrino i kosmologiya
  • GRB sputnik dlya issledovaniya svoistv temnoi energii
  • Identifikaciya krasnogo giganta, porodivshego sverhnovuyu 2005cs
  • Massa millisekundnogo pul'sara


    Iz razdela physics
  • Nauka, tehnologii i obshestvo
  • Oruzhie na antiveshestve (1946-1986)


    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 N111
    astro-ph za 01 - 21 iyulya 2005 goda: izbrannye stat'i

    Goryachie temy nedeli


    Auger, HiRes, H.E.S.S., Veritas & Co.

    Poyavilas' massa statei, posvyashennyh proektam Auger, HiRes, H.E.S.S. i VERITAS. Vse eta lavina rabot svyazana v osnovnom s 29-i mezhdunarodnoi konferenciei po kosmicheskim lucham, kotoraya proidet v Indii.

    H.E.S.S. prodolzhaet otchityvat'sya o nablyudeniyah ob'ektov raznogo tipa. Sredi svezhih rabot rezul'taty (v osnovnom otricatel'nye) po poisku gamma-izlucheniya ot galaktiki NGC 253 (astro-ph/0507370) i ot molodyh pul'sarov (astro-ph/0507388).

    Vazhneishii eksperiment HiRes, nablyudayushii kosmicheskie luchi ochen' vysokih energii, vypustil seriyu statei. Neopredelennostyam v opredelenii spektra kosmichekih luchei posvyashena stat'ya astro-ph/0507401. Osoboe vnimanie stoit udelit' rabote astro-ph/0507465. V nei rasskazyvaetsya o poiske korrelyacii mezhdu napravleniyami prihoda kosmicheskih luchei sverhvysokih energii i napravleniyami na ob'ekty tipa BL Lac.

    Ogromnyi proekt Auger nachal svoyu rabotu. Poetomu predstavleny kak dannye kalibrovki, tak i pervye rezul'taty. Tak v stat'e astro-ph/0507402 predstavleny pervye verhnie predely na dolyu protonov v kosmicheskih luchah, poluchennye v ramkah proekta.

    Proekt VERITAS takzhe raportuet. V stat'e astro-ph/0507440 rech' idet o TeVnyh nablyudeniyah skopleniya galaktik v Persee. Nablyudeniya aktivnyh galakticheskih yader opisany v rabote astro-ph/0507441. Poiski diffuznogo TeVnogo izlucheniya ot rukava v Lebede opisany v astro-ph/0507446. Est' i mnozhestvo drugih rabot. Rekomenduyu posmotret' dlya nachala vot etu - astro-ph/0507451 - v nei privedena svodka pervyh rezul'tatov proekta.


    Referaty otdel'nyh statei



    astro-ph/0507047 Vspyshka i kratkovremennoe uvelichenie pul'siruyushego potoka ot kandidata v magnitary 1E 1048.1-5937 (A Burst and Simultaneous Short-Term Pulsed Flux Enhancement from the Magnetar Candidate 1E 1048.1-5937)
    Authors: Fotis P. Gavriil et al.
    Comments: 24 pages, 4 figures, submitted to the Astrophysical Journal

    Kak izvestno, kandidatami v magnitary yavlyayutsya dva tipa neitronnyh zvezd: istochniki myagkih povtoryayushihsya gamma-vspleskov (MPG) i anomal'nye rentgenovskie pul'sary (ARP). Pervye byli otkryty blagodarya svoei vspyshechnoi aktivnosti. Vtorye - blagodarya postoyannomu rentgenovskomu izlucheniyu. Odnako neskol'ko let nazad bylo pokazano, chto ARP mogut porozhdat' rentgenovskie vspyshki, vo mnogom podobnye vspleskam MPG. Ot istochnika 1E 1048.1-5937 (eto odin iz ARP) uzhe registrirovalis' vspyshki, i vot - eshe odna.

    Primechatel'no, chto vspyshki ARP imeyut sushestvennoe otlichie ot slabyh (naibolee chasto vstrechayushihsya) vspyshek MPG. Eto - nalichie dlinnogo "hvosta", v kotorom i sosredotochena osnovnaya dolya vydelyaemoi energii. Vsplesk, kotoromu posvyashena dannaya zametka, osobenno vydelyaetsya. Posle osnovnoi vspyshki nablyudalsya rentgenovskii "hvost" dlitel'nost'yu okolo 700 sekund. Vozmozhno, pishut avtory, issledovanie etogo razlichiya pomozhet ponyat' raznicu mezhdu ARP i MPG.


    astro-ph/0507052 Yarkostnoe ogranichenie na modeli ostyvaniya molodyh neitronnyh zvezd (Brightness constraint for cooling models of young neutron stars)
    Authors: H. Grigorian
    Comments: 12 pages 2 figures 1 table
    astro-ph/0507061 Effekty sredy v ohlazhdenii neitronnyh zvezd i 3P2 neitronnaya shel' (Medium Effects in Cooling of Neutron Stars and $3P_2$ Neutron Gap)
    Authors: H. Grigorian, D.N. Voskresensky
    Comments: 18 p., 12 figs., widen version of astro-ph/0501678

    Dve stat'i, posvyashennye raschetam ostyvaniya neitronnyh zvezd.

    V pervoi rabote issleduetsya sistematika zavisimosti rezul'tatov raschetov v ramkah scenariya "nuclear meduim cooling" ot parametrov sverhtekuchesti i ot svoistv vneshnih sloev neitronnoi zvezdy. Takzhe vvoditsya "ogranichenie po yarkosti", sut' kotorogo sostoit v sleduyushem. Dlya neitronnyh zvezd s massoi primerno 1.1 massy solnca nedopustimy parametry, privodyashie k poyavleniyu bolee yarkih istochnikov, chem nablyudaemye v nastoyashii moment.

    Vo vtoroi rabote provedeno detal'noe issledovanie zavisimosti rezul'tatov rascheta ot parametrov sheli sverhtekuchih neitronov.


    obzor astro-ph/0507130 Obrazovanie pervyh svetyashihsya ob'ektov (The Formation of Primordial Luminous Objects)
    Authors: Emanuele Ripamonti, Tom Abel
    Comments: 51 pages, 25 figures. Lecture notes for the spring 2003 SIGRAV Doctoral School "The Joint Evolution of Black Holes and Galaxies", to be published in: M.Colpi, V.Gorini, F. Haardt, U. Moschella (eds.), "Joint Evolution of Black Holes and Galaxies", series in High Energy Physics, Cosmology and Gravitation, Institute of Physics Publishing, Bristol and Philadelphia

    Bol'shoi obzor (lekciya), posvyashennyi obrazovaniyu pervyh svetyashihsya ob'ektov vo vselennoi. T.e. rech' idet o massivnyh pervyh zvezdah, sostoyavshih iz legkih elementov. Oni obrazovalis' do poyavleniya pervyh galaktik i vnesli sushestvennyi vklad v obogashenie vselennoi tyazhelymi elementami.


    astro-ph/0507147 Pozdnie radionablyudeniya 74 sverhnovyh tipa Ibc: sil'nye ogranicheniya na vneosevye gamma-vspleski (Late-time Radio Observations of 74 Type Ibc Supernovae: Strong Constraints on Off-Axis Gamma-ray Bursts)
    Authors: A. M. Soderberg, E. Nakar, S. R. Kulkarni
    Comments: Submitted to ApJ (13 pages, 3 figures)

    Predstavleny rezul'taty radionablyudenii 74 sverhnovyh tipa Ibc, kotorye, kak schitaetsya, mogut svyazany s gamma-vspleskami. Populyarnaya gipoteza glasit, chto dlinnye (dlinnee neskol'kih sekund) gamma-vspleski svyazany so sverhnovymi. Vzryvayushiesya zvezdy uzhe ne imeyut vodorodnyh obolochek. V rezul'tate kollapsa obrazuetsya chernaya dyra. Vokrug chernoi dyry formiruetsya toroobraznaya struktura. Bystrovrashayushiisya tor privodit k vozniknoveniyu gamma-vspleska. Vsplesk sil'no kollimirovan (t.e. izluchenie idet v uzkom konuse). Esli vse eto tak, to dazhe v sluchae, kogda dzhet napravlen ne na nas, mozhno ozhidat' registracii radioizlucheniya. Ni v odnom iz 74 issledovanyh sluchae takoe izluchenie ne bylo obnaruzheno. Eto pozvolyaet sdelat' ochen' sil'nye ogranicheniya na model'. V chastnosti, menee 1.4 procenta sverhnovyh dannogo tipa mogut byt' svyazany s gamma-vspleskami.

    Esli zhe vydelit' t.n. "gipernovye" (ih vydelyayut po shirokim opticheskim absorbcionnym liniyam; sredi 74 issledovannyh sverhnovyh takih 6), to verhnii predel na dolyu gamma-vspleskov sredi nih sostavit 17 procentov. Znachit, esli gamma-vspleski v samom dele svyazany so sverhnovymi etogo tipa (a mnogie issledovateli osparivayut takuyu tochku zreniya), to nado kak-to ob'yasnyat', chto vydelyaet te, chto dayut gamma-vsplesk. Naprimer, eto mozhet byt' vrashenie (v modeli kollapsara nuzhen vysokii udel'nyi uglovoi moment, chtoby sozdat' bystrovrashayushiisya tor vokrug chernoi dyry). Togda nuzhno issledovat' kanaly evolyucii dvoinyh (sm., naprimer, astro-ph/0505406), kotorye privodyat k raskrutke praroditelei sverhnovyh.


    astro-ph/0507157 Sputnik ASTRO-F: infrakrasnyi obzor bol'shih ploshadei (The ASTRO-F Mission : Large Area Infrared Survey)
    Authors: Hideo Matsuhara et al.
    Comments: accepted for publication in Advances in Space Research, 15 pages, 7 Postscript figures, uses elsart.cls

    Opisyvaetsya proekt ASTRO-F. Eto pervyi yaponskii sputnik, kotoryi budet provodit obzor neba v IK diapazone. V stat'e rasskazyvaetsya kak o samom apparate, tak i o zadachah, stoyashih pered etoi missiei.


    astro-ph/0507206 Massa neitronnoi zvezdy v SMC X-1 (The mass of the neutron star in SMC X-1)
    Authors: A.K.F. Val Baker, A.J. Norton, H. Quaintrell
    Comments: Accepted for publication by A&A

    Opredelenie mass neitronnyh zvezd - eto chrezvychaino vazhnaya, no, vmeste s tem, i chrezvychaino slozhnaya zadacha.

    V ramkah nekotoryh model'nyh predpolozhenii avtory poluchayut verhnii predel na massu neitronnoi zvezdy v izvestnoi sisteme SMC X-1. Znachenie okazyvaetsya dostatochno nebol'shim: 1.21 +/- 0.1 massy Solnca. S drugoi storony standartnoe znachenie 1.4 lezhit vsego "v dvuh sigma".


    astro-ph/0507343 Zvezdnaya evolyuciya s vrasheniem XIII: temp gamma-vspleskov na raznyh z (Stellar evolution with rotation XIII: Predicted GRB rates at various Z)
    Authors: R. Hirschi, G. Meynet, A. Maeder
    Comments: 16 pages, 14 figures, accepted by A&A

    Kak uzhe ne raz rasskazyvalos' v Obzorah dlya rozhdeniya gamma-vspleska v standartnoi modeli neobhodimo, chtoby do obrazovaniya chernoi dyry yadro zvezdy dostatochno bystro vrashalos'. Raschety evolyucii zvezd s uchetom vrasheniya - trudnaya zadacha. V dannoi stat'e (13-i v serii) predstavleny raschety, pokazyvayushie, chto odinochnye zvezdy mogut imet' dostatochno bystrovrashayushiesya yadra (odnako, avtory prenebregayut po-krainei mere odnim vazhnym, no trudno uchityvaemym effektom). Sootvetstvenno, avtory pytayutsya rasschitat' temp gamma-vspleskov na raznyh krasnyh smesheniyah.


    miniobzor astro-ph/0507346 Neitrino i kosmologiya (Neutrinos and Cosmology: an update)
    Authors: Ofelia Pisanti, P.D. Serpico
    Comments: 4 pages, 1 figure, to appear in the proceedings of IFAE, Catania 2005

    Daetsya obzor roli neitrino v kosmologii v svete poslednih rezul'tatov po izucheniyu krupnomasshtabnoi struktury, pervichnogo nukleosinteza i anizotropii reliktovogo fona.


    astro-ph/0507362 GRB sputnik dlya issledovaniya svoistv temnoi energii (A Gamma-Ray Burst Mission to Investigate the Properties of Dark Energy)
    Authors: D. Q. Lamb et al.
    Comments: White paper submitted to the Dark Energy Task Force. 37 pages

    Opisyvaetsya proekt sputnika, prednaznachennogo dlya nablyudenii gamma-vspleskov (GRB). Interesno, chto osnovnaya cel', zayavlennaya avtorami, sostoit ne stol'ko v issledovanii samih vspleskov, skol'ko v primenenii dannyh po vspleskam k kosmologii, a imenno k opredeleniyu parametrov temnoi energii. Predpolagaetsya, chto sputnik smozhet uvidet' 800 gamma-vspleskov na bol'shih krasnyh smesheniyah (vplot' do 10). Imenno eto i pozvolit provesti opredelenie parametrov temnoi energii analogichno dannym po sverhnovym.

    Opisanie drugogo proekta - SNAP, - prednaznachennogo uzhe dlya nablyudeniya sobstvenno sverhnovyh, mozhno naiti v stat'yah astro-ph/0507458-61.


    astro-ph/0507394 Identifikaciya krasnogo giganta, porodivshego sverhnovuyu 2005cs (Identification of the Red Supergiant Progenitor of Supernova 2005cs: Do the Progenitors of Type II-P Supernovae Have Low Mass?)
    Authors: Weidong Li et al.
    Comments: Submitted to ApJ

    Udalos' opredelit' kakaya zvezda porodila sverhnovuyu v M51. Okazalos', chto eto krasnyi sverhgigant. Ocenka massy daet znachenie poryadka 7-9 mass Solnca (pered vzryvom). Eto ukazyvaet na to, chto sverhnovye tipa II s plato na krivoi bleska porozhdayutsya otnositel'no malomassivnymi zvezdami.


    astro-ph/0507420 Massa millisekundnogo pul'sara (The Mass of a Millisecond Pulsar)
    Authors: B. A. Jacoby et al.
    Comments: 12 pages, 3 figures, accepted for publication in ApJL

    Vpervye dostatochno tochno izmerena massa millisekundnogo pul'sara. Ona okazalas' ravnoi 1.438 +/- 0.024 massy Solnca. Eto vazhnyi rezul'tat, t.k. mozhno ocenit' skol'ko veshestva neitronnaya zvezda uspela naakkrecirovat' poka raskruchivalas' vtorym komponentom sistemy. Eta velichina sostavlyaet menee 0.2 mass Solnca.




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

    physics/0507092 Nauka, tehnologii i obshestvo (Science,technology and society)
    Authors: G. Giacomelli, R. Giacomelli
    Comments: 8 pages, Lecture at the 7th School on Non-Accelerator Astroparticle Physics, Trieste,Italy,2004

    Dostatochno trivial'noe esse na temu vzaimootnoshenii nauki i obshestva. Odnako, nesmotrya na trivial'nost', mnogim ono mozhet pokazat'sya nebezinteresnym.

    physics/0507132 Oruzhie na antiveshestve (1946-1986) (Antimatter weapons (1946-1986): From Fermi and Teller's speculations to the first open scientific publications)
    Authors: Andre Gsponer, Jean-Pierre Hurni
    Comments: 13 pages, 3 figures. The World Scientist (New Delhi, India, 1987) 74--77, and in Bulletin of Peace Proposals, Vol. 19 (Oslo,1988) 444--450

    Rasskaz o rabotah po antiveshestvu (v osnovnom po antiprotonam) v prilozhenii k sozdaniyu sverhmoshnogo oruzhiya.


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