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Soderzhanie i bystryi perehod k razdelam obzora
Issledovanie kratnosti zvezd s ekzoplanetami Skol'zyashii obzor XMM-Newton: shirokougol'nyi obzor na energiyah 0.2-12 keV Ogranicheniya na al'ternativy sverhmassivnym chernym dyram
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.
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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Obzory preprintov astro-ph
Vypusk N121
astro-ph za 01 - 10 dekabrya 2005 goda: izbrannye stat'i
Referaty otdel'nyh statei
Authors: Greg Madejski Comments: To appear in "Astrophysical Sources of High Energy Particles and Radiation", eds. T. Bulik, B. Rudak, and G. Madejski, AIP Conference Proceedings, vol 801 (2005), proc. conf. in Torun, Poland, 20-24 June 2005 Opisany nekotorye rezul'taty nablyudenii na Chandre. Nemnogo rasskazano ob uzhe zapushennom yaponskom sputnike Suzaku (izvestnom takzhe pod imenem Astro-E2). U etogo sputnika, k sozhaleniyu, voznikli tehnicheskie problemy, iz-za chego odin iz samyh interesnyh eksperimentov na ego bortu ostanetsya neosushestvlennym. V konce stat'i kratko opisany dve budushie missii: GLAST i NuSTAR. GLAST budet zapushen uzhe v 2007 g., s nim, vrode by, vse v poryadke. NuSTAR dolzhen poletet' v 2009, no etot srok eshe mozhet byt' skorrektirovan (v storonu bolee pozdnego zapuska, razumeetsya).
Authors: Douglas Galante, Jorge Ernesto Horvath Comments: 27 pages, 3 figure, submitted to Astrobiology Rassmotreny biologicheskie (otricatel'nye, razumeetsya) effekty kosmicheskih gamma-vspleskov. Pokazano, chto dazhe s rasstoyaniya poryadka 100 kpk takie sobytiya opasny dlya zhizni na Zemle. A vot gigantskie vspleski istochnikov myagkih povtoryayushihsya gamma-vspleskom mogut nanesti usherb tol'ko, esli rasstoyanie mezhdu Zemlei i istochnikom sostavit 100 pk ili menee. Tak chto mozhno zhit' spokoino.
Authors: Chris L. Fryer, Alexander Kusenko Comments: 22 pages including 8 figures, submitted to ApJ, version with high resolution figures can be found at this http URL Kak izvestno, pri svoem rozhdenii vo vzryvah sverhnovyh neitronnye zvezdy poluchayut "tychki" (udary, tolchki, kiki - kicks). Prichin dlya etogo mozhet byt' neskol'ko, naprimer - nesimmetrichnoe izluchenie neitrino. Avtory rassmotreli, kak takie "neitrinnye udary" mogut povliyat' na dinamiku vzryva. Pokazano, chto vklad neitrino pomogaet ustroit' nastoyashii vzryv s vybrosom. Konechno, eto eshe ne znachit, chto osnovnye problemy mehanizma vzryva sverhnovyh resheny ...
Authors: N. I. Libeskind, S. Cole, C. S. Frenk, J. C. Helly Comments: 12 pages, 7 figures, Submitted to MNRAS Avtory obsuzhdayut sledstviya togo, chto chernye dyry pri sliyanii mogut priobretat' lineinyi moment. Ya ob etom rasskazyval v proshlom godu: astro-ph/0402056, astro-ph/0408492. Osnovnoi vyvod stat'i sostoit v tom, chto neskol'ko procentov chernyh dyr mogut pokidat' galaktiki i vyletat' v mezhgalakticheskoe prostranstvo. Krome togo, okolo poloviny chernyh dyr budut "boltat'sya" v galo galaktiki. Osobo otmechu, chto nakonec-to v pechati vyskazana ideya, kotoraya davno grela moe serdce, no po ryadu prichin razvit' ee ne udalos'. Eto ideya o tom, chto ul'tramoshnye istochniki mogut byt' svyazany s takimi bluzhdayushimi chernymi dyrami promezhutochnyh mass. Kratko ob etom mozhno pochitat' v moei stat'e na Astronete (v dorabotannom vide stat'ya byla opublikovana v zhurnale Vselennaya. Prostranstvo. Vremya. ). O sliyaniyah chernyh dyr sm. takzhe eshe bolee svezhuyu rabotu astro-ph/0512123.
Authors: M. Mugrauer, R. Neuhuser, T.Mazeh, E. Guenther Comments: 3 pages, 1 figure Avtory prodolzhayut poisk kompan'onov u zvezd, imeyushih planety. Imi naideno 6 komponentov na shirokih orbitah. T.o. polnoe chislo dvoinyh zvezd s ekzoplanetami vozroslo do 20. Poisk kompan'ona u belogo karlika Gl86 ne dal polozhitel'nogo rezul'tata.
Authors: M. J. Freyberg et al. Comments: 6 pages, 6 figures, to appear in the proceedings of "The X-ray Universe 2005", San Lorenzo de El Escorial (Spain), 26-30 September 2005 Ya uzhe upominal ob etom obzore, no togda eto byl tol'ko proekt. Sut' v tom, chto poka HMM perenavoditsya, on vse ravno chto-to da vidit. Iz-za togo, chto HMM - eto ochen' moshnyi pribor, dazhe neskol'kih sekund, poka vzglyad N'yutona skol'zit po nebu, dostatochno dlya togo, chtoby poluchit' dannye na urovne sputnikov, zapuskavshihsya v 80-90-e gg. T.o. uchenye nadeyutsya sdelat' "skol'zyashii" obzor neba. Poka predstavleny rezul'taty po 6300 kvadratnym gradusam. Zaregistrirovano okolo 4000 istochnikov. Zhdem pervogo kataloga!
Authors: Ciro Bigongiari (for the MAGIC collaboration) Comments: 4 pages, 2 figures To be published on proceedings of HEP2005 International Europhysics Conference on High Energy Physics EPS (July 21st-27th 2005) in Lisboa, Portugal Vot uzhe god rabotaet teleskop MAGIC. Eto samyi krupnyi gamma-teleskop. Poka, k sozhaleniyu, nikakih superrezul'tatov na nem ne polucheno, i, na moi vzglyad, proekt H.E.S.S. ego obgonyaet. Tem ne menee, krupnyi instrument eshe "vystrelit". Poka zhe mozhno pochitat' kak tam vse ustroeno i chto uzhe udalos' uvidet'.
Authors: M. Coleman Miller Comments: 5 pages including 1 figure, accepted by MNRAS Kak izvestno, ne smotrya na to, chto koncepciya chernyh dyr schitaetsya bolee chem standartnoi, poluchit' pryamye dokazatel'stva ih sushestvovaniya ochen' trudno. Poetomu dostatochno vazhno obsuzhdat' vozmozhnye al'ternativy. V sluchae sverhmassivnyh chernyh dyr v yadrah galaktik takih al'ternativ neskol'ko: skopleniya dvoinyh ili odinochnyh slabosvetyashihsya zvezd, ekzoticheskie sverhmassivnye ob'ekty i t.d. V stat'e pokazano, chto mozhno zakryt' neskol'ko vozmozhnyh al'ternativ. T.e. nalichie chernyh dyr stanovitsya vse bolee neizbezhnym. V chastnosti, pokazano, chto skoplenie dvoinyh kompaktnyh ob'ektov ne reshaet problemu. Dovol'no bystro ono dolzhno privesti k obrazovaniyu chernoi dyry. Eshe odna stat'ya na blizkuyu temu, no uzhe v prilozhenii k centru nashei Galaktiki, opublikovana Broderikom i Narayanom. Eti avtory privodyat dopolnitel'nye argumenty v pol'zu togo, chto central'noe massivnoe telo ne mozhet imet' poverhnosti (t.e. yavlyaetsya chernoi dyroi).
Authors: Max Tegmark, Nick Bostrom Comments: 3 pages, 1 fig Skoree pessimisticheskaya zametka. Avtory pokazyvayut, chto vsyakie global'nye katastrofy bolee veroyatny, chem ocenivalos' ranee, t.k. avtory ne uchityvali tot prostoi effekt selekcii, chto my sami poka sushestvuem. Tem ne menee, avtory pokazyvayut, chto v blizhaishii milliard let mozhno osobenno ni o chem ne bespokoit'sya. Tochnee tak, bespokoit'sya mozhno hot' seichas, no veroyatnost' togo, chto chto-to proizoidet v 2006 g. sostavlyaet poryadka odnoi milliardnoi.
My budem starat'sya hotya by perechislit' interesnye (dlya shirokoi publiki) stat'i, poyavivshiesya v razdele physics (vklyuchaya cross-listing).
Authors: M.V.Danilov Comments: Review Talk at the Lepton and Photon Symposium, Uppsala, 2005 Opisany nauchno-issledovatel'skie razrabotki (NIR, angl. variant R&D - research and development) po sozdaniyu novyh detektorov elementarnyh chastic. Osoboe vnimanie udeleno kremnievomu fotoumnozhitelyu (Silicon Photomultiplier).
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