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Prodolzhaetsya seriya lekcii sotrudnikov GAISh
v Politehnicheskom muzee
Sleduyushaya lekciya - 04 oktyabrya
Lekciyu chitaet avtor obzorov
Tema lekcii: magnitary i ih aktivnost'
Nekotoroe vvedenie mozhno prochest'
na saite Elementy.Ru


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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/0509408
    Neitronnaya zvezda s massivnym praroditelem v skoplenii Westerlund 1

  • astro-ph/0509628
    Bol'shaya populyaciya galaktik na rasstoyaniyah, sootvetstvuyushih vremenam ot 9 do 12 milliardov let tomu nazad

  • astro-ph/0509766
    GRB 050904 na krasnom smeshenii 6.3: nablyudeniya samogo starogo vzryva posle Bol'shogo
    astro-ph/0509697
    GRB 050904: gamma-vsplesk na ochen' bol'shom krasnom smeshenii
    astro-ph/0509737
    Registraciya moshnogo vzryva v rannei vselennoi


    Otdel'nye stat'i
  • Slaboe gravitacionnoe linzirovanie
  • Kosmicheskie puteshestviya v dalekom budushem
  • Ot AMANDA k IceCube
  • Materialy kollaboracii ICECUBE dlya 29-i mezhdunarodnoi konferencii po kosmicheskim lucham
  • Neitronnaya zvezda s massivnym praroditelem v skoplenii Westerlund 1
  • Kiki dvoinyh i odinochnyh neitronnyh zvezd: nablyudatel'nye ogranicheniya i prilozheniya k mehanizmu kika
  • Ostatok gamma-vspleska v nashei Galaktike: HESS J1303-631
  • Bol'shaya populyaciya galaktik na rasstoyaniyah, sootvetstvuyushih vremenam ot 9 do 12 milliardov let tomu nazad
  • GRB 050904: gamma-vsplesk na ochen' bol'shom krasnom smeshenii
  • Obzor pul'sarov v Aresibo s ispol'zovaniem ALFA. I. Strategiya obzora i pervye otkrytiya
  • Registraciya moshnogo vzryva v rannei vselennoi
  • GRB 050904 na krasnom smeshenii 6.3: nablyudeniya samogo starogo vzryva posle Bol'shogo
  • Ukazaniya na sushestvovanie massivnoi galaktiki, proshedshei period moshnogo zvezdoobrazovaniya, na z=6.5
  • Obzor malomassivnyh zvezd i buryh karlikov
  • Katalog 1022 yarkih kontaktnyh dvoinyh sistem
  • Peredovye rubezhi chislennyh raschetov v teorii otnositel'nosti
  • Gravitacionno-volnovoi fon ot magnitarov


    Iz razdela physics
  • Zerkal'nyi zal
  • Gravitacionnye volny: novye nablyudeniya dlya novoi astronomii


    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 N116
    astro-ph za 11 sentyabrya - 30 sentyabrya 2005 goda: izbrannye stat'i


    Referaty otdel'nyh statei



    obzor astro-ph/0509252 Slaboe gravitacionnoe linzirovanie (Weak Gravitational Lensing)
    Authors: Peter Schneider
    Comments: 180 pages, 57 figures, to appear in: Kochanek, C.S., Schneider, P., Wambsganss, J.: Gravitational Lensing: Strong, Weak & Micro. Lecture Notes of the 33rd Saas-Fee Advanced Course, G. Meylan, P. Jetzer & P. North (eds.), Springer-Verlag: Berlin, p.273

    Ogromnyi obzor po slabomu linzirovaniyu.

    So slabym linzirovaniem my stalkivaemsya v osnovnom v kosmologii. Linzami v osnovnom vystupayut skopleniya galaktik. Blagodarya effektu slabogo linzirovaniya udaetsya rekonstruirovat' raspredelenie mass v skopleniyah, chto na ruku kosmologam, i v nastoyashee vremya eta metodika aktivno primenyaetsya v astronomii.


    astro-ph/0509268 Kosmicheskie puteshestviya v dalekom budushem (The Long-Term Future of Space Travel)
    Authors: Jeremy S. Heyl
    Comments: 4 pages, 3 figures

    Avtor (izvestnyi astrofizik, rabotayushii seichas v Kanade; mnogim, veroyatno, izvestny ego raboty po magnitaram) rassmatrivaet gipoteticheskie perspektivy poletov na bol'shie rasstoyaniya s uchetom uskoreniya rasshireniya Vselennoi. Konechno, interes tut chisto akademicheskii, no mozhet komu-to iz fantastov, kto eshe ne naigralsya s rassuzhdeniyami o pereletah na kosmologicheskie rasstoyaniya, eto budet interesno. Krome togo, eto bezuslovno interesno kak zadacha po kosmologii.


    obzor astro-ph/0509322 Ot AMANDA k IceCube (From AMANDA to IceCube)
    Authors: The IceCube Collaboration: Mathieu Ribordy, et al
    Comments: 15 pages, 8 figures Invited talk contribution at 5th International Conference on Non-accelerator New Physics (NANP 05), Dubna, Russia, 20-25 Jun 2005

    AMANDA - eto neitrinnyi ledyanoi (t.e. nahodyashiisya v tolshe l'da) detektor, ustanovlennyi v Antarktide. ICECUBE - eto budushii detektor, kachestvenno pohozhii na AMANDA, no prevoshodyashii ego po razmeram. V korotkom obzore opisyvayutsya oba proekta. Opisyvaetsya chto uzhe poluchila AMANDA, i chto v budushem smozhet poluchit' ICECUBE.

    Podrobnee ob ICECUBE mozhno prochest' v sleduyushei stat'e, a eta posluzhit neplohim vvedeniem.


    sbornik statei astro-ph/0509330 Materialy kollaboracii ICECUBE dlya 29-i mezhdunarodnoi konferencii po kosmicheskim lucham (The IceCube Collaboration: contributions to the 29th International Cosmic Ray Conference (ICRC 2005), Pune, India, Aug. 2005)
    Authors: The IceCube Collaboration
    Comments: 75 pages, 60 figures

    Sobrano 18 korotkih statei, posvyashennyh razlichnym aspektam neitrinnogo teleskopa ICECUBE.


    astro-ph/0509408 Neitronnaya zvezda s massivnym praroditelem v skoplenii Westerlund 1 (A Neutron Star with a Massive Progenitor in Westerlund 1)
    Authors: M. P. Muno et al.
    Comments: 4 pages, 4 figures. Submitted to ApJL

    V zvezdnom skoplenii Westerlund 1 (na risunke) otkryt anomal'nyi rentgenovskii pul'sar (ARP). Napomnim, chto soglasno sovremennym predstavleniyam ARP - eto molodaya neitronnaya zvezda s sil'nym magnitnym polem. Seichas izvestno uzhe 8 takih ob'ektov plyus est' neskol'ko kandidatov. Chto primechatel'nogo v etom otkrytii? Interesno to, chto Westerlund1 - eto ochen' molodoe skoplenie, v kotorom lish' samye massivnye zvezdy uspeli zakonchit' svoi evolyucionnyi put'. T.o. poluchaetsya, chto praroditelem novogo ARP byla zvezda s nachal'noi massoi okolo 40 mass Solnca. Eto podtverzhdaet gipotezu o tom, chto ARP (i magnitary voobshe) rozhdayutsya iz samyh massivnyh zvezd iz chisla teh, chto eshe porozhdayut neitronnuyu zvezdu, a ne chernuyu dyru.


    astro-ph/0509484 Kiki dvoinyh i odinochnyh neitronnyh zvezd: nablyudatel'nye ogranicheniya i prilozheniya k mehanizmu kika (Neutron Star Kicks in Isolated and Binary Pulsars: Observational Constraints and Implications for Kick Mechanisms)
    Authors: Chen Wang, Dong Lai, JinLin Han
    Comments: 30 pages, 2 figures, submitted to ApJ on Aug. 24, 2005

    Kak izvestno, pri rozhdenii neitronnye zvezdy priobretayut znachitel'nuyu prostranstvennuyu skorost' za schet kika (kick - udar, tolchok). Mehanizm kika do sih por ne izvesten. On mozhet byt' svyazan kak s gidrodinamikoi protoneitronnoi zvezdy, tak i s ee magnitnym polem. Krome togo, predlozhen ryad bolee ekzoticheskih mehanizmov (naprimer, bol'shie skorosti mogli by priobretat'sya v sluchae obrazovaniya kvarkovoi zvezdy).

    Avtory stat'i obrashayut osoboe vnimanie na to, kak seichas napravlen vektor skorosti neitronnoi zvezdy otnositel'no osi ee vrasheniya. Osnovnoi vyvod avtorov takov: harakternoe vremya kika - poryadka odnoi sekundy. T.e. imenno za eto vremya neitronnaya zvezda nabiraet skorost'. Sootvetstvenno, esli period vrasheniya neitronnoi zvezdy byl menee 1 sekundy, to dva vektora budut pochti sonapravleny. Esli zhe period vrasheniya prevoshodit sekundu, to napravleniya osi vrasheniya i vektora skorosti sovpadat' ne budut.


    astro-ph/0509615 Ostatok gamma-vspleska v nashei Galaktike: HESS J1303-631 (A gamma-ray burst remnant in our Galaxy: HESS J1303-631)
    Authors: A. Atoyan, J. Buckley, H. Krawczynski
    Comments: 7 pages, 3 figures; submitted to Nature 12 August 2005

    Napomnyu, chto H.E.S.S. - eto nazemnaya sistema, prednaznachennaya dlya registracii gamma-fotonov (tochnee, registriruyutsya ne sami fotony, a vspyshki, porozhdaemye imi v atmosfere Zemli). V stat'e rassmatrivaetsya istochnik HESS J1303-631. On nahoditsya v ploskosti Galaktiki, i prakticheski ne izluchaet v drugih (krome gamma) diapazonah.

    Avtory polagayut, chto HESS J1303-631 yavlyaetsya ostatkom vspyshki gipernovoi, kotoraya soprovozhdalas' gamma-vspleskom. Osnovaniem v pervuyu ochered' yavlyaetsya ocenka energii vzryva, porodivshego nablyudaemyi ostatok. Krome togo, avtory nahodyat ukazanie na vytyanutost' istochnika, chto mozhet svidetel'stvovat' o sushestvovanii dzhetov. Pravy oni ili net dolzhny pokazat' bolee detal'nye issledovaniya.


    astro-ph/0509628 Bol'shaya populyaciya galaktik na rasstoyaniyah, sootvetstvuyushih vremenam ot 9 do 12 milliardov let tomu nazad (A large population of galaxies 9 to 12 billion years back in the history of the Universe)
    Authors: O. Le Fevre et al.
    Comments: Nature, 2005, 437, 519

    Naideno 970 galaktik na krasnyh smesheniyah ot 1.4 do 5. Eto v neskol'ko raz bol'she, chem predskazyvalos' (yasno, chto rech' idet ob obzore nebol'shogo uchastka neba). Galaktiki v srednem imeyut ochen' bol'shoi temp obrazovaniya zvezd (v desyatki raz vyshe, chem v nashei). Eto govorit o tom, chto i temp zvezdoobrazovaniya na etih krasnyh smesheniyah ranee prinimalsya sushestvenno zanizhennym.


    astro-ph/0509697 GRB 050904: gamma-vsplesk na ochen' bol'shom krasnom smeshenii (GRB 050904: A very high redshift gamma ray burst)
    Authors: P.A. Price et al.
    Comments: Submitted to ApJ Letters
    astro-ph/0509737 Registraciya moshnogo vzryva v rannei vselennoi (Detection of a huge explosion in the early Universe)
    Authors: G. Cusumano et al.
    Comments: 11 pages, 1 table, 3 figures. Note: this paper has been submitted for publication in Nature, It is embargoed for discussion in the popular press
    astro-ph/0509766 (GRB 050904 na krasnom smeshenii 6.3: nablyudeniya samogo starogo vzryva posle Bol'shogo (GRB 050904 at redshift 6.3: observations of the oldest cosmic explosion after the Big Bang)
    Authors: G. Tagliaferri et al.
    Comments: 2 figures, 5 pages, Submitted to A&A. Full author list in the paper

    Srazu tri stat'i posvyasheny nablyudeniyam odnogo sobytiya, i ne zrya! Eto samyi dalekii gamma-vsplesk, iz obnaruzhennyh na segodnyashnii den'. Ego krasnoe smeshenie 6.3 !!!! Pri standartnyh kosmologicheskih parametrah eto smeshenie sootvetstvuet 13 milliardam let (t.e. Vselennoi bylo 700-750 millionov let ot rodu).


    astro-ph/0509732 Obzor pul'sarov v Aresibo s ispol'zovaniem ALFA. I. Strategiya obzora i pervye otkrytiya (Arecibo Pulsar Survey Using ALFA. I. Survey Strategy and First Discoveries)
    Authors: J. M. Cordes et al.
    Comments: 10 pp, 9 figures, accepted by the Astrophysical Journal

    Predstavleny rezul'taty novogo pul'sarnogo obzora, provodimogo v Aresibo. Uzhe otkryto 11 novyh pul'sarov, sredi nih est' i primechatel'nye. Odin, po vidimomu, svyazan s ranee neotozhdestvlennym gamma-istochnikom, otkrytym priborom EGRET na bortu CGRO. Drugoi nahoditsya v dvoinoi sisteme s korotkim orbital'nym periodom, no pri etom imeet dovol'no bol'shoi period vrasheniya (144 millisekundy). Tretii interesen tem, chto ot nego zaregistrirovany lish' otdel'nye sporadicheskie impul'sy.


    astro-ph/0509768 Ukazaniya na sushestvovanie massivnoi galaktiki, proshedshei period moshnogo zvezdoobrazovaniya, na z=6.5 (Evidence for a Massive Post-Starburst Galaxy at z ~ 6.5)
    Authors: B. Mobasher et al.
    Comments: Accepted for publication in Ap.J. 31 pages, 6 diagrams

    V hode special'nogo poiska massivnyh galaktik na bol'shih krasnyh smesheniyah byl naiden interesnyi kandidat. Dlya ego vyyavleniya ponadobilas' mosh' takih instrumentov kak Kosmicheskii teleskop, kosmicheskaya IK-observatoriya Spitcer i VLT. Naibolee veroyatno, chto eto massivnaya galaktika na z=6.5, prichem period burnogo zvezdoobrazovaniya prishelsya na z=9. Polnoi uverennosti u avtorov net, t.k. est' i drugaya (menee veroyatnaya, kak oni pishut) vozmozhnost', chto eto galaktika na z=2.5 s bol'shim kolichestvom pyli. Tak chto nuzhny dopolnitel'nye issledovaniya.


    obzor astro-ph/0509798 Obzor malomassivnyh zvezd i buryh karlikov (Review on low-mass stars and brown dwarfs)
    Authors: G. Chabrier et al.
    Comments: Invited review, "Resolved Stellar Populations", Cancun, april 2005

    Eto teoreticheskii obzor, no vse ravno bez dannyh nablyudenii tut ne oboshlos'. Avtory v osnovnom rassmatrivayut uspehi i problemy v opisanii zvezd malyh mass. Tut i obrazovanie buryh karlikov i malomassivnyh zvezd, i teoriya ih stroeniya, i ih atmosfery, ....

    Vazhnoe utverzhdenie avtorov sostoit v tom, chto razgranichenie mezhdu planetami i zvezdami dolzhno prohodit' ne po linii, za kotoroi vozmozhno gorenie deiteriya. Oni polagayut, chto "vodorazdel" svyazan s processami obrazovaniya nebesnyh tel (detali - v stat'e).


    astro-ph/0509819 Katalog 1022 yarkih kontaktnyh dvoinyh sistem (A Catalog of 1022 Bright Contact Binary Stars)
    Authors: S. J. Gettel, M. T. Geske, T. A. McKay
    Comments: 26 pages, 12 figures, accepted for publication in AJ

    Osobennost' kataloga v tom, chto on poluchen sistemoi ROTSE. Napomnyu, chto iznachal'no eta patrul'naya sistema prednaznachalas' dlya poiskov opticheskih tranzientov, soprovozhdayushih gamma-vspleski. No vspleski vse ne popadayutsya, a dannyh sistema sobiraet mnozhestvo. Poetomu pochti vse podobnye proekty nachinayut "pereprofilirovat'sya", stanovyatsya "mnogostanochnikami" i universalami. (Takaya zhe istoriya, naprimer, proishodit s rossiiskim proektom MASTER.) V samom dele, kazhduyu noch' (esli nebo yasnoe) sistemy otsnimayut vse nebo. Informacii more!!! Nado ee ispol'zovat'!

    I vot - katalog kontaktnyh dvoinyh. Dlya postroeniya kataloga ispol'zovalis' takzhe dannye 2MASS (Two Micron All-Sky Survey). Dlya kazhdogo ob'ekta poluchena detal'naya krivaya bleska. Katalog pozvolil poluchit' novuyu ocenku prostranstvennoi plotnosti takih sistem: (1.7 +/- 0.6) x 10-5 pk-3.

    Sm. takzhe stat'yu teh zhe avtorov astro-ph/0509820, gde opisany dannye sputnika ROSAT po etim ob'ektam.


    obzor gr-qc/0509094 Peredovye rubezhi chislennyh raschetov v teorii otnositel'nosti (Numerical Relativity at the Frontier)
    Authors: Stuart L. Shapiro
    Comments: to appear in `The Next Chapter in Einstein's Legacy'', Proceedings of YKIS 2005, Kyoto, Japan, eds M. Sasaki, J. Soda and T. Tanaka, in Progress of Theoretical Physics Suppl, in press (2006)

    Takoi vot dlinnyi perevod nazvaniya. Sut' raboty konechno v tom, chto zhe novogo est' v chislennom modelirovanii processov, v kotoryh veliki effekty Obshei teorii otnositel'nosti. Zadachi eti vo-pervyh seichas ochen' aktual'ny (naprimer, v svyazi s perspektivoi registracii gravitacionnyh signalov ot slivayushihsya chernyh dyr), vo-vtoryh oin stanovyatsya bolee dostupnymi v smysle togo, chto moshnost' komp'yuterov vse eshe rastet. No odnoi mosh'yu tut krepost' ne vzyat'. Nuzhno razrabatyvat' novye algoritmy. Etomu sobstvenno i posvyashen obzor.


    astro-ph/0509880 Gravitacionno-volnovoi fon ot magnitarov (Gravitational Wave Background from Magnetars)
    Authors: Tania Regimbau, Jos Antonio de Freitas Pacheco
    Comments: accepted for publication in A&A 17 pages, 7 figures

    Ranee eti avtory uzhe provodili raschety gravitacionno-volnovogo fona, svyazannogo s odinochnymi neitronnymi zvezdami. Delo v tom, chto poskol'ku neitronnye zvezdy slegka nesimmetrichny, oni izluchayut gravitacionnye volny. Izluchayut slabo, no zvezd takih vo vselennoi mnogo. Poetomu summarnyi signal poluchaetsya zametnym, i on mozhet byt' zadetektirovan kak fon. V etoi rabote avtory udelyayut osoboe vnimanie magnitaram. Prichina v tom, chto sil'nye magnitnye polya mogut privodit' k dopolnitel'noi deformacii neitronnoi zvezdy, a takaya zvezda budet sil'nee izluchat'. V proshlyh rabotah etot fakt ignorirovalsya, a zdes' uchten.

    Avtory polagayut, chto fon ot magnitarov mozhet v budushem meshat' registracii kosmologicheskih gravitacionnyh voln.

    Ot sebya dobavim, chto fon mozhet prihodit' sushestvenno neravnomerno ot raznyh uchastkov neba, t.k. magnitary dolzhny byt' sil'no skoncentrirovany v galaktikah s vysokim tempom zvezdoobrazovaniya. Mozhet byt' etot fakt kak-to pomozhet vychest' magnitarnyi fon.




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

    physics/0509171 Zerkal'nyi zal (A cosmic hall of mirrors)
    Authors: Jean-Pierre Luminet
    Comments: 13 pages, 5 colour figures. Last news on cosmic topology. pdf only, Physics World 18, 22-28 (september 2005)

    Populyarnaya stat'ya posvyashena topologii vselennoi. Sut' v tom, kak sdelat' konechnuyu i otnositel'no nebol'shuyu vselennuyu kak by beskonechnoi dlya nahodyashegosya v nei nablyudatelya. Takaya konstrukciya chem-to napominaet zerkal'nyi zal, otsyuda i nazvanie stat'i. Tol'ko vo Vselennoi my, konechno zhe, stalkivaemsya ne s obychnymi zerkalami, a so slozhnoi topologiei, pozvolyayushei lucham sveta ogibat' vselennuyu. V rezul'tate v raznyh oblastyah neba mozhno budet videt' podobnye (no ne tochno odinakovye iz-za iskazhenii) ob'ekty.

    Koe-chto na etu temu mozhno pochitat' zdes' , a takzhe zdes'.

    physics/0509201 Gravitacionnye volny: novye nablyudeniya dlya novoi astronomii (Gravitational Waves: new observatories for new astronomy)
    Authors: Louis J. Rubbo et al.
    Comments: See related hands-on activity at physics/0503198. Accepted to The Physics Teacher

    Populyarnyi obzor, posvyashennyi gravitacionnym volnam, ih detektoram i istochnikam.


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