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Soderzhanie i bystryi perehod k razdelam obzora
Istoricheskie nablyudeniya solnechnyh pyaten: obzor Verhnie predely na gravitacionno-volnovoe izluchenie dlya 78 pul'sarov Neobychnyi dvoinoi pul'sar PSR J1744-3922: peremennost' radio potoka, nablyudeniya v blizhnem IK i evolyuciya
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.
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Diskussii po stat'yam Arhiva
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Obzory preprintov astro-ph
Vypusk N149
astro-ph za 01 - 14 fevralya 2007 goda: izbrannye stat'i
Referaty otdel'nyh statei
Authors: Eric V. Linder Comments: News & Views, Nature 445, 273 (2007) Navernoe v ideale tak dolzhny vyglyadet' vse soobsheniya v obzorah. Kak izvestno, Nature v kazhdom nomere publikuet populyarnoe korotkoe izlozhenie (s kommentariyami) vazhnyh rezul'tatov, opublikovannyh v tom zhe nomere. V dannom sluchae rech' idet o rezul'tatah proekta COSMOS. Ne budu pereskazyvat' soderzhanie, tem bolee chto tam vsego odna stranica. Sut' v tom, chto kosmologi poluchayut vse bolee i bolee tochnye karty raspredeleniya temnogo veshestva vo vselennoi, chto ne mozhet ne radovat'.
Authors: S. Aigrain et al. , the CoRoT Exoplanet Science Team Comments: 11 pages, 2 figures. A version with full resolution figures is available from this http URL Sputnik CoRoT uzhe zapushen. Vse idet po planu. Poetomu polezno eshe raz vzglyanut' na nauchnoe soderzhanie missii, a takzhe na nekotorye tehnicheskie harakteristiki. Vse eto i summirovanno v obzore.
Versiyu stat' s kartinkami v vysokom razreshenii mozhno skachat' zdes'. Eto
PDF-fail.
Authors: J. M. Vaquero Comments: 19 pages, 6 figures, to be published in Adv. Space Res Krupnye solnechnye pyatna vidny nevoobruzhennym glazom. Poetomu v nekotorom smysle nablyudeniya etih obrazovanii imeyut ochen' dolguyu istoriyu. Istoricheskie hroniki pomogayut vosstanovit' (konechno, ne ochen' horosho, s probelami i neopredelennostyami) dannye o poyavlenii solnechnyh pyaten v proshlom. Etomu i posvyashen obzor.
Obsudit' v ZhZh-soobshestve
ru_astroph.
Authors: Alexander Unzicker Comments: 29 pages LaTeX, 2 figures Dan horoshii perechen' dannyh po proverke teorii gravitacii na raznyh masshtabah. Zamechu, chto po proverke zakonov tyagoteniya na malyh rasstoyaniyah nedavno byli polucheny novye rezul'taty (stat'ya s novymi rezul'tatami dostupna tut tut, takzhe sm. etot blog).
Obsudit' v ZhZh-soobshestve
ru_astroph.
Authors: J. R. Brownstein, J. W. Moffat Comments: 25 pages, 14 figures, 5 tables Avtory opyat' pytayutsya pokazat', chto dannye po stalkivayushimsya skopleniyam galaktik mozhno interpretirovat' bez gipotezy o temnom veshestve. Ya dumayu, chto argumenty avtorov ne verny, i tem ne menee, stat'ya dostatochno polezna, poskol'ku napisana ochen' kvalificirovannymi uchenymi i po delu. T.o., eto horoshaya illyustraciya togo, kak neprosto delat' sovremennuyu astrofiziku, gde u nas v rukah est' tol'ko dannye nablyudenii, kotorye nuzhno kak-to interpretirovat'.
Authors: Lawrence M. Krauss Comments: 6 pages, Invited Review talk, Neutrino 2006. Korotkii i, na moi vgzlyad, ochen' tolkovyi obzor po kandidatam v temnuyu materiyu. Kompaktno i yasno izlozheno, kakie chatsicy mogut yavlyat'sya horoshimi kandidatami, a kakie - net (i pochemu).
Authors: D. Gotz, et al. Comments: 8 pages, 9 figures, Proceedings of the 6th INTEGRAL Workshop, Moscow, 2006 07 03-07, ESA SP-622 Sputnik INTEGRAL vnes sushestvennyi vklad i issledovaniya magnitarov - istochnikov myagkih povtoryayushihsya gamma-vspleskov (MPG) i anomal'nyh rentgenovskih pul'sarov (ARP). V pervuyu ochered', sleduet otmetit' otkrytie "zhestkih hvostov" v spektrah ARP. Takzhe, INTEGRAL zaregistriroval mnozhestvo vspleskov MPG. Nu i, razumeetsya, pronablyudal gigantskuyu vspyshku dekabrya 2004 goda. V stat'e summirovany vse osnovnye rezul'taty, hotya osnovnoe vnimanie udeleno rezul'tatam, poluchennym samim avtorami.
Authors: Hovik Grigorian Comments: 22 pages, 9 figures, Lecture notes for the Helmholtz International Summer School on "Dense Matter in Heavy-Ion Collisions and Astrophysics", JINR, Dubna, August 21 - September 1, 2006 Ponyatnyi obzor, posvyashennyi vnutrennemu stroeniyu i teplovoi evolyucii neitronnyh zvezd.
Authors: The LIGO Scientific Collaboration: B. Abbott, et al, M. Kramer, A. G. Lyne Comments: 21 pages LIGO prodolzhaet sbor dannyh. Komanda regulyarno vydaet verhnie predely na gravitacionno-volnovoe izluchenie ot radiopul'sarov (obo vsem etom, kstati, mozhno pochitat' vo vtorom nomere "Vokrug Sveta"). Rastet chislo issledovannyh pul'sarov, i predely stanovyatsya vse luchshe i luchshe. Samyi zhestkii na segodnyashnii den' daet parametr ekvatorial'noi elliptichnosti uzhe na urovne 10-6 (ob opredelenii etogo parametra sm., naprimer, gr-qc/0508096, str. 2 uravnenie 2). Eto uzhe na urovne ozhidaemogo. T.e., po vsei vidimosti, nedalek tot den', kogda poyavitsya i signal. LIGO ili VIRGO pervym ego poimayut - uvidim.
Authors: Gordon E. Sarty, Laszlo L. Kiss, Helen M. Johnston, Richard Huziak, Kinwah Wu Comments: 11 pages, Accepted: JAAVSO Stat'ya yavlyaetsya prizyvom k astronomam-lyubitelyam zanyat'sya poiskom i izucheniem periodichnosti v opticheskih krivyh bleska massivnyh rentgenovskih sistem. V stat'e rasskazyvaetsya chto eto za sistemy, kak i zachem ih nuzhno nablyudat'. Dobavlyu, chto katalog sistem s Ve-zvezdami mozhno naiti zdes'.
Obsudit' v ZhZh-soobshestve
ru_astroph.
Authors: W.Becker et al. Comments: 30 pages, Summary of the Joined Discussion (JD02) held at the XXVI IAU General Assembly in 2006 August in Prague. To appear in "Highlights of Astronomy, Volume 14", ed. K.A. van der Hucht Dan obzor dokladov, predstavlennyh na poslednei General'noi assamlee MAS v Prage. Stat'ya daet neplohoi predstavlenie o tom, chto seichas proishodit v oblasti izucheniya pul'sarov.
Authors: Kate Y. L. Su et al. Comments: 5 pages, emulateapj format, accepted for publication in ApJ Letters S pomosh'yu kosmicheskoi infrakrasnoi observatorii Spitcer udalos' uvidet' disk vokrug central'noi zvezdy izvestnoi planetarnoi tumannosti "Ulitka" (NGC 7293). Central'noi zvezdoi yavlyaetsya goryachii (110 000K) belyi karlik. Sushestvuyut zhestkie ogranicheniya na vozmozhnuyu dvoistvennost' zvezdy.
Na risunke pokazano izobrazhenie tumannosti "Ulitka" na dline volny 70 mikron. Avtory polagayut, chto nalichie diska mozhet byt' svyazano so stolknoveniyami ob'ektov, vhodyashih v strukturu tipa nashego poyasa Koipera, ili s ispareniem komet, vhodyashih v analog oblaka Oorta. Eto bylo by dovol'no lyubopytno, t.k. zvezda, ochevidno, proshla stadiyu giganta i sbrosila obolochku. Znachit, ili komety, ili planetoidy smogli etot epizod v zhizni zvezdy perezhit'.
Authors: Abraham Loeb Comments: 7 pages, Popular level review, to appear in "Physica Plus" magazine, Vol. 8; a modified version with original artwork appeared in Scientific American, 295, 46, 2006 Stat'ya posvyashena "temnomu periodu" v zhizni vselennoi. Eta epoha sootvetstvuet promezhutku mezhdu epohoi rekombinacii (o kotoroi my znaem blagodarya izucheniyu reliktovogo izlucheniya) i vremenem poyavleniya pervyh galaktik.
Authors: Renata Kallosh Comments: 38 pages, 8 figures. Based on an invited talk at "Inflation + 25", 22nd IAP Colloquim, Paris (June 2006). To be published in the Proceedings (Springer Lecture Notes, 2007) Podrobnyi (i dovol'no ponyatnyi) obzor, posvyashennyi zayavlennoi tematike.
Authors: M. Stupar et al. Comments: 14 pages, 7 figures. Accepted for publishing in Astrophysics and Space Science PMN - Parkes-MIT-NRAO. Eto radioobzor neba, kotoryi pozvolyaet izuchat' prakticheski vse ostatki sverhnovyh v nashei Galaktike. Tochnee, 164 iz 231 ostatka. Avtory vybrali 138 ostatkov, dlya kotoryh dannye imeyut dostatochno vysokoe kachestvo, i predstavili rezul'taty analiza etih ob'ektov. Vazhnym rezul'tatom raboty yavlyaetsya utochnenie parametrov metoda, kotoryi pozvolyaet opredelyat' rasstoyaniya do ostatkov.
Authors: Lawrence M. Krauss, Glenn D. Starkman Comments: 4 pages Esli temnaya materiya sostoit iz slabovzaimodeistvuyushih chastic (WIMP), to eti chasticy annigiliruyut drug s drugom (estestvenno, chasticy i antichasticy). T.o., v otdalennom budushem temnoi materii budet stanovit'sya men'she. Eto mozhet vliyat' na svoistva ryada ob'ektov, naprimer, na karlikovye sputniki galaktik. Harakter etogo vliyaniya i obsuzhdaetsya avtorami. Razumeetsya, vremya, kogda takoi process stanet dinamicheski vazhnym, chudovishno veliko (zavedomo posle 2008 goda). Krome togo, esli est' temnaya energiya tipa lyambda-chlena, to i bez annigilyacii temnoi materii vse razletitsya. Tem ne menee, ne lishne znat', chto v tom sluchae, esli v budushem materiya opyat' stanet dominirovat' (naprimer, vklad temnoi energii budet umen'shat'sya), to vse ravno budushee (dazhe bez temnoi materii i temnoi energii) ne takoe uzh i svetloe. Skopleniya galaktik raspadutsya, sputniki galaktik razletyatsya, a vse iz-za annigilyacii chastic temnoi materii.
Authors: The HESS Collaboration: F.Aharonian, et al Comments: 13 pages, 11 figures, accepted for publication in A&A H.E.S.S. otnablyudal desyatok pul'sarov, ot kotoryh mozhno bylo by ozhidat' zametnogo potoka gamma-izlucheniya vysokoi energii. Rezul'tat nulevoi. Uchityvaya velikolepnye parametry H.E.S.S., eto ochen' ser'eznye verhnie predely. Oni ukazyvayut na to, chto na energiyah poryadka TeV v spektre pul'sarov dolzhen byt' zagib. Eto daet ser'eznye ogranicheniya na modeli izlucheniya pul'sarov.
Authors: F. Marzari, M. Barbieri Comments: 5 pages, 5 figures Accepted for publication on A&A Otvet na vopros, zadannyi v zagolovke, otricatel'nyi. Avtory chislenno rasmatrivayut evolyuciyu planetnyh orbit v ierarhicheskoi troinoi sisteme (dve zvezdy formiruyut tesnuyu paru, a tret'ya krutitsya na shirokoi orbite vokrug pary). Planety obrazuyutsya vokrug bolee massivnoi zvezdy v pare. V hode evolyucii odna iz zvezd troinoi sistemy vyletaet. Razumeetsya, orbity planet v ostavsheisya dvoinoi zametno otlichayutsya ot togo, chto bylo v samom nachale.
Authors: R. P. Breton et al. Comments: 18 pages, 8 figures, accepted for publication of ApJ Avtory polagayut, chto etot neobychnyi pul'sar i eshe neskol'ko drugih obrazuyut osobyi klass ob'ektov, vydelyayushiisya sredi osnovnoi massy dvoinyh pul'sarov. V chastnosti, dlya ih formirovaniya nuzhen osobyi evolyucionnyi kanal. Magnitnoe pole pul'sara okazyvaetsya slishkom sil'nym, a period slishkom dlinnym, uchityvaya parametry dvoinoi sistemy. Krome togo, pul'sar pokazyvaet sil'nuyu peremennost', chto netipichno dlya dvoinyh pul'sarov s malomassivnymi kompan'onami na orbitah s korotkim orbital'nym periodom.
Authors: C. Bambi, A.D. Dolgov Comments: 12 pages, no figures Avtory rassmatrivayut vozmozhnye nablyudatel'nye proyavleniya ob'ektov iz antiveshestva v nashei Galaktike. Yasno, chto kogda my govorim ob otsutstvii antiveshestva, my imeem vvidu, chto ego "men'she, chem nekotoroe kolichestvo, kotoroe uzhe zametili by". Zametili by, veroyatnee vsego, po gamma-izlucheniyu, voznikayushemu v rezul'tate annigilyacii. Tak chto, kak eto chasto byvaet, my "nikogda ne govorim nikogda", a prosto stavim verhnie predely. S nablyudatel'noi tochki zreniya situaciya seichas horoshaya: est' ser'eznye gamma-teleskopy, v samom skorom vremeni poletyat gamma-observatorii GLAST i AGILE, seichas na orbite rabotaet eksperiment PAMELA, prednaznachennyi dlya poiska antiyader, skoro dolzhen byt' zapushen AMS. AMS - eto eshe bolee krupnyi, chem PAMELA magnitnyi spektrometr, kotoryi dolzhny ustanovit' na MKS. No, poskol'ku ves' grafik MKS sbilsya, vvod v stroi AMS vse vremya otkladyvaetsya. T.o., v blizhaishem budushem mozhno ozhidat' kakih-to otkrytii, ili, skoree vsego, eshe bolee zhestkih predelov. Rezyume avtorov, estestvenno, ne soderzhit nikakih zhestkih utverzhdenii. V Galaktike est' mesto dlya nekotorogo kolichestva ob'ektov iz antiveshestva. Odnako poka nikakih sil'nyh argumentov v pol'zu ih sushestvovaniya net, a nablyudeniya dayut vse bolee strogie verhnie predely.
Obsudit' v ZhZh-soobshestve
ru_astroph.
My budem starat'sya hotya by perechislit' interesnye (dlya shirokoi publiki) stat'i, poyavivshiesya v razdele physics (vklyuchaya cross-listing).
Authors: H. Nikolic Comments: 7 pages Dovol'no ostroumnaya stat'ya. Avtor rassmatrivaet "al'ternativnuyu istoriyu kvantovoi mehaniki". Tochnee, on zadaetsya voprosom, stala by kopengagenskaya interpretaciya dominiruyushei, esli by bomovskaya interpretaciya poyavilas' ran'she.
Authors: J. L. Garcia-Palacios Comments: 104 pages, 15 figs. Undergraduate (2002) and graduate course notes (2005). Examples drawn from both translational and rotational Brownian motion Lekcionnyi kurs po statisticheskoi fizike. Nichego osobennogo, no komu-to mozhet prigodit'sya.
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