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Soderzhanie i bystryi perehod k razdelam obzora
Otkrytie dvuh pul'sarov v napravlenii galakticheskogo centra Astrofizika v 2005 godu Fizika sil'nozamagnichennyh neitronnyh zvezd
Otdel'nye stat'i
Iz razdela physics
Polnyi Arhiv predydushih vypuskov. Arhiv statei, voshedshih v vypuski s 01 iyulya 2002 g. po 31 marta 2003 g.
Arhiv na 14.04.2006
odnim failom
Razdely arhiva (s aprelya 2003 g.): Poleznye astronomicheskie ssylki. Korotkoe esse ob elektronnyh preprintah. Obzornye stat'i v astro-ph 2001-2003 gg.
Avtor proekta
Diskussii po stat'yam Arhiva
Proekt razmeshen na saitah:
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Druzhestvennye rassylki: "Astronomiya segodnya" "Astronomiya dlya shkol'nikov" "Okno vo Vselennuyu" Spisok astrorassylok |
Obzory preprintov astro-ph
Vypusk N137
astro-ph za 16 iyunya - 30 iyunya 2006 goda: izbrannye stat'i
Referaty otdel'nyh statei
Authors: I.F. Mirabel Comments: 4 pages, Perspective article to be published in Science vol. 312 (June 23, 2006) Korotkaya, no soderzhatel'naya zametka, posvyashennaya registracii kosmicheskih luchei ochen' vysokih energii ot treh sistem: dvuh mikrokvazarov (LS 5039, LS I +61 303) i odnoi dvoinoi sistemy s pul'sarom (PSR B1259-63). Otkrytiya eti ne sovsem novye, tem ne menee, ne u vseh eto na sluhu. Rekomenduetsya k prochteniyu.
Authors: Q. Daniel Wang Comments: 10 pages, an invited talk presented in the GC2006 workshop Prakticheski vse rentgenovskie teleskopy pomnogu nablyudayut oblast' vblizi galakticheskogo centra. Imeetsya vvidu ne tol'ko (i ne stol'ko) sam Sgr A*, a oblast' razmerom v neskol'ko kvadratnyh gradusov. Chandra - ne isklyuchenie. 2 milliona sekund bylo potracheno na nablyudeniya ob'ektov v oblasti centra Galaktiki. Obnaruzheno okolo 4000 istochnikov. V stat'e daetsya obzor osnovnyh rezul'tatov etih nablyudenii.
Authors: Michael L. Rogers, Mercedes T. Richards, Donald St.P. Richards Comments: 15 pages, including 8 figures Kak izvestno, prodolzhitel'nost' solnechnogo cikla lish' v srednem blizka k 11 godam. Otkloneniya mogut byt' znachitel'nymi, prodolozhitel'nost' mozhet kolebat'sya ot 7 do 17 let. Svyazany li eti kolebaniya s chislom pyaten? Avtory issledovali izmeneniya chisla pyaten (yasno, chto podobnye issledovaniya provodilis' mnogokratno, raznica - v metodike analiza) i nashli period 188+/-38 let, kotoryi otrazhaet izmeneniya dliny solnechnogo cikla. Dlina cikla korreliruet s chislom pyaten: kogda pyaten men'she, cikl dlinnee.
Authors: A. Gil de Paz et al. Comments: 181 pages, 10 figures, accepted for publication in ApJS GALEX - nebol'shoi sputnik, prednaznachennyi dlya izucheniya galaktik. V stat'e predstavlen atlas, sozdannyi po dannym ul'trafioletovyh nablyudenii galaktik na etom apparate. Vsego v atlas voshli 1034 ob'ekta. Atlas dostupen on-lain: http://nedwww.ipac.caltech.edu/level5/GALEX_Atlas/. Odnako, esli vy dumaete, chto po ssylke vas zhdut 1034 krasivyh izobrazheniya, to vas, kak i menya zhdet razocharovanie. Vo-pervyh, ne zhdut (poka est' tol'ko fraza: "budut razmesheny"). Vo-vtoryh, izobrazheniya budut v FITS-formate. T.e., eto ne krasivyi resurs dlya publiki, a ser'eznyi resurs dlya issledovatelei. Poka zhe izobrazheniya nuzhno prosit' u pervogo avtora stat'i.
Authors: Simon Johnston, M. Kramer, D. R. Lorimer, A. G. Lyne, M. McLaughlin, B. Klein, R. N. Manchester Comments: 5 pages, Submitted to MNRAS Letters Sushestvuet takaya problema: zvezd v oblasti galakticheskogo centra mnogo, v tom chisle i molodyh, a vot s pul'sarami - napryazhenka. Byli dazhe otdel'nye raboty, pokazyvavshie nedostatok pul'sarov vblizi centra Galaktiki (rech' idet o central'nyh sotnyah parsek). A vot raportuyut ob otkrytii dvuh istochnikov, kotorye po vsei vidimosti raspolozheny na 150-500 pk ot centra.
Authors: Noam Soker, Romuald Tylenda Comments: Submitted to MNRAS Sliyanie dvuh normal'nyh zvezd mozhet privesti v rezkomu vydeleniyu bol'shoi energii. V rezul'tate, my mozhem nablyudat' vspyshku, t.e. tranzientnyi istochnik. Avtory rassmatrivayut imenno takuyu model'. Oni polagayut, chto tak mozhno ob'yasnit' vspyshki tipa nablyudavsheisya u zvezdy V838 Monocerotis. Osnovnoi vyvod sostoit v tom, chto vydelen interval otnosheniya mass, pri kotorom yarkie vspyshki vozmozhny. Slovami, eto mozhno opisat' kak "otnoshenie mass dolzhno byt' ne slishkom bol'shim i ne slishkom malym", kolichestvenno zhe: 0.003 Ob infrakrasnyh nablyudeniyah V838 Mon mozhno prochest' zdes': astro-ph/060691.
Authors: Christopher van Eldik Comments: 8 pages, 4 figures, to appear in the proceedings of the 41st Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Aosta Valley, Italy, 11-18 March 2006 Chto skryvat', mne nravitsya proekt H.E.S.S. Poetomu, hotya ya uzhe mnogokratno vklyuchal v svoi obzory raboty, posvyashennye rezul'tatam H.E.S.S., ya delayu eto eshe raz. Kto ne chital ob etom proekte - ne polenites'.
Authors: Mark Alford et al. Comments: 3 pages, LaTeX V nedavnei stat'e astro-ph/0605106 byl proveden analiz dannyh po neitronnoi zvezde v tesnoi dvoinoi rentgenovskoi sisteme EXO 0748-676. Vyvod avtora sostoyal v tom, chto t.n. myagkie uravneniya sostoyaniya veshestva kompaktnoi zvezdy mozhno otvergnut'. Stalo byt', razvivala etu mysl' avtor, mozhno zakryt' i kvarkovye zvezdy. Odnako avtory dannoi stat'i pokazyvayut, chto vyvod, sdelannyi v stat'e astro-ph/0605106, yavlyaetsya slishkom sil'nym obobsheniem, ibo mnogie sovremennye modeli kvarkovyh zvezd imeyut dovol'no zhestkoe uravnenie sostoyaniya. T.o., polagayut avtory stat'i, ocenki massy i radiusa EXO 0748-676 ne protivorechat gipoteze kvarkovyh zvezd.
Authors: Roeland P. van der Marel et al. Comments: STScI Newsletter, 2006, vol. 23, number 2, in press; 5 pages and 2 figures. Sobstvenno, v stat'e opisan veb-proekt, posvyashennyi chernym dyram. Mozhno pochitat' stat'yu, a mozhno srazu poiti na sait.
Authors: Martin White Comments: 10 pages, 6 figures, proceedings of the UC Irvine conference on cosmic microwave background temperature and polarization anisotropies Dostatochno populyarno opisyvaetsya, kakuyu nauku mozhno budet delat', kogda budet rabotat' sputnik Planck. Estestvennym obrazom stat'ya vklyuchaet v sebya kak by kratkii kurs po kosmologii, t.k. prihoditsya govorit' o raznyh parametrah i modelyah.
Authors: Aldo M. Serenelli, Masataka Fukugita Comments: 26 pages, including 8 figures and 3 tables. Submitted to ApJS V stat'e rassmotreno, kak zvezdy s massami ot 1 do 8 solnechnyh teryayut energiyu i massu v techenie zhizni. Na osnove sushestvuyushih evolyucionnyh trekov detal'no rassmotreno kogda, chto i v kakoi forme zvezdy vybrasyvayut vovne. Na moi vzglyad, eto polezno ne tol'ko specialistam, no i vsem, interesuyushimsya zvezdnoi evolyuciei v detalyah.
Authors: V. Trimble, M.J. Aschwanden, C.J. Hansen Comments: 364 p. Wow! Virdzhiniya Trimbl prodolzhaet zazhigat'! Vse-vse-vse lyubili i lyubyat ee obzory. V kakoi-to moment delat' obzory v odinochku stalo tyazhelo, i Virdzhiniya privlekla k etoi vazhnoi rabote kolleg. Vot ocherednoi obzor za 2005 god. Ne hochu kommentirovat', lish' molcha preklonyayus' pered prodelannoi rabotoi. Proshlye obzory mozhno pytat'sya skachat' zdes'. Odnako, veroyatnee vsego, dostup budet zakryt.
Authors: Alice K. Harding, Dong Lai Comments: 93 pages. Reports on Progress in Physics, in press (2006) Otlichnyi bol'shoi obzor po neitronnym zvezdam s sil'nym magnitnym polem. Osnovnoe vnimanie udelyaetsya teorii, sobstvenno, avtory i yavlyayutsya teoretikami. Vazhnyi moment sostoit v tom, chto pri roste magnitnogo polya proishodit "perehod kolichestva v kachestvo". Est' nekotorye kriticheskie znacheniya polya, pri kotoryh sushestvennymi stanovyatsya processy, ne idushie (ili ochen' maloeffektivnye) pri men'shih polyah. Samoe vazhnoe kriticheskoe znachenie - 4.4 1013 Gauss. Eto t.n. Shvingerovskoe pole. V takom pole ciklotronnaya energiya elektrona stanovitsya ravnoi ego energii pokoya. Takie polya - eto ne pridumka teoretikov. Tochnee, eto bylo pridumkoi. A seichas my znaem bolee dyuzhiny neitronnyh zvezd, ocenki polei v kotoryh dayut znacheniya, prevyshayushie shvingerovskoe.
Authors: M. C. Weisskopf, M. Karovska, G. G. Pavlov, , V. E. Zavlin, T. Clarke Comments: 10 pages, 14 figures. Submitted to Astronomy and Space Science. Based on presentation at Isolated Neutron Stars, London, 2006 Postepenno nachinayut poyavlyat'sya materialy prekrasnoi konferencii po odinochnym neitronnym zvezdam, proshedshei v aprele v Londone. Kak yasno iz nazvaniya, rech' idet o vklade Chandry v issledovaniya etih ob'ektov: central'nyh kompaktnyh ob'ektov v ostatkah sverhnovyh, radiopul'sarov, ob'ektov Velikolepnoi semerki. Vazhen dazhe otricatel'nyi rezul'tat: avtory special'no opisyvayut vazhnye verhnie predely, poluchennye na Chandre, dlya vozmozhnoi neitronnoi zvezdy v ostatke sverhnovoi 1987A i v gamma Lebedya (SNR 78.2+2.1).
My budem starat'sya hotya by perechislit' interesnye (dlya shirokoi publiki) stat'i, poyavivshiesya v razdele physics (vklyuchaya cross-listing).
Authors: Nathaniel Lasry, Pierre-Osias Christin Comments: 6 pages (PDF only) , Submitted to: The Physics Teacher Korotkaya zametka, posvyashennaya tomu, kak sdelat' prostye fizicheskie demonstracii dlya shkol'nikov bolee zrelishnymi.
Authors: K. A. Milton Comments: 21 pages, no figures, to appear in a volume in honor of E. Majorana edited by A. Zichichi Biograficheskaya stat'ya ob izvestnom fizike nobelevskom laureate Dzhuliane Shvingere. Pomnite, v "Fiziki shutyat" byl shablon dlya napisaniya statei po kvantovoi elektrodinamike, nachinavshiisya "kak pokazal Shvinger...", tak vot eto on.
Authors: Siegfried Bethke Comments: 38 pages, 18 figures Kak izvestno, nobelevskie premii ne dayut za neproverennye teorii. Za asimptoticheskuyu svobodu dali, znachit proverili. Vsyu istoriyu etoi proverki, a takzhe sovremennoe sostoyanie del v etom voprose mozhno uznat' iz stat'i.
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