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Pervaya pryamaya registraciya gravitacionnoi mikrolinzy v napravlenii galakticheskogo baldzha Korotkie zhestkie gamma-vspleski Pervye nazemnye izmereniya atmosfernogo cherenkovskogo izlucheniya kosmicheskih luchei
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
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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 N148
astro-ph za 13 - 31 yanvarya 2007 goda: izbrannye stat'i
Referaty otdel'nyh statei
Authors: Piero Madau Comments: 8 pages, Invited talk at the IAU Symposium 238: "Black Holes: From Stars to Galaxies -Across the Range of Masses". Prague, August 2006 Poleznyi obzor po chernym dyram. Rech' idet ob ob'ektah, voznikayushih iz samyh pervyh zvezd (populyaciya III) na bol'shih krasnyh smesheniyah, i ob ih evolyucii. Imenno sliyaniya etih chernyh dyr i akkreciya na nih privodyat k formirovaniyu sverhmassivnyh chernyh dyr v yadrah galaktik. No uzhe na bol'shih krasnyh smesheniyah, edva vozniknuv, chernye dyry mogut nachat' siyat' kak pervye mikrokvazary... V obshem - interesnyi i ochen' ponyatnyi obzor. V dopolnenie stoit obratit' vnimanie na obzor astro-ph/0701512.
Authors: S. Kozlowski et al. Comments: 6 pages, 5 figures; submitted to ApJ Obychno, kogda nablyudayut effekt mikrolinzirovaniya, to ob'ekt-linza ostaetsya neizvestnym. Chto-to temnoe i massivnoe proletelo mezhdu nami i istochnikom - i vse. Redko-redko udaetsya potom rassmotret' samu linzu. Vot vpervye razglyadeli zvezdochku, vyzvavshuyu sobytie MACHO-95-BLG-37. Ei okazalas' zvezda tipa Solnca (chut' men'she i holodnee, spektral'nyi klass K2) s massoi okolo 0.6 solnechnyh na rasstoyanii 3.5 kpk ot nas.
Authors: Bing Zhang Comments: Invited review for Chinese Journal of Astronomy & Astrophysics, 60 pages, to appear in 2007, ChJAA, 7, 1-50 Daetsya podrobnyi obzor poslednih rezul'tatov po gamma-vspleskam s uporom na dannye sputnika Swift.
Authors: N.R. Napolitano, M. Paolillo Comments: Conference proceedings of the "1st Workshop of Astronomy and Astrophysics for Students" held in Naples (ITALY) on April 19-20, 2006. Published by INFN-Naples, eds. N.R. Napolitano & M. Paolillo. Konechno, zagolovok nuzhdaetsya v ogovorkah, ibo studencheskih konferencii provodilos' i provoditsya ochen' mnogo. Itak, predstavleny materialy studencheskoi konferencii, proshedshei v aprele 2006 g. v Italii. Sami materialy udobnee skachat' otsyuda.
Authors: Robert Connon Smith Comments: 41 pages, 11 figures, invited review for Contemporary Physics Podrobnyi obzor po kataklizmicheskim peremennym. Eto ochen' interesnye tesnye dvoinye sistemy s belymi karlikami, pokazyvayushie bol'shoe raznoobrazie astrofizicheskih yavlenii.
Authors: Jorick S. Vink Comments: 5 pages, Conference summary on stellar winds to appear in "Mass loss from stars and the evolution of stellar clusters". Proc. of a workshop held in honour of H.J.G.L.M. Lamers, Lunteren, The Netherlands. Eds. A. de Koter, L. Smith and R. Waters (San Francisco: ASP) Est' takoi izvestnyi astrofizik - Lamers. V ego chest' byla provedena rabochaya vstrecha, posvyashennaya ego kon'ku - potere massy massivnymi zvezdami. V korotkom obzore summirovany osnovnye poslednie razrabotki i dostizheniya v dannoi oblasti.
Authors: Ehud Nakar Comments: A review, 125 pages, 12 figures. Physics Reports - Bethe Centennial Volume, in press Bol'shoi podrobnyi obzor po korotkim gamma-vspleskam. Poslednie dannye (ya neodnokratno pisal ob etom v obzorah) vozrodili interes k etomu klassu gamma-vspleskov. Avtor obsuzhdaet ih otlichiya ot dlinnyh gamma-vspleskov, a takzhe vozmozhnye intrepretacii. Sm. takzhe stat'yu astro-ph/0701748, posvyashennuyu praroditelyam korotkih gamma-vspleskov.
Authors: HESS Collaboration: F.A. Aharonian, et al Comments: 14 pages, 13 figures, accepted for publication in Phys. Rev. D S kosmicheskimi luchami do sih por svyazano mnogo zagadok. Vrode by, dannye nedavnih nablyudenii proyasnili proishozhdenie galakticheskih kosmicheskih luchei: ih porozhdayut ostatki sverhnovyh. Odnako ostaetsya neyasnym, chto zhe za chasticy i v kakih proporciyah oni sostavlyayut potok kosmicheskih luchei. Eto mogut byt' elektrony, eto mogut byt' yadra (ot prosto protonov do yader zheleza). Chtoby razobrat'sya v sostave luchei nuzhno izmeryat' energii, t.e. stroit' spektr. Spektr energii kosmicheskih luchei tyanetsya na mnogo dekad. V raznyh diapazonah ispol'zuyut raznye podhody, svyazannye kak so specifikoi izmerenii, tak i prosto s kolichestvom chastic, delo v tom, chto chislo chastic rezko padaet s rostom energii. V diapazone ot 1 GeVa do 1 PeVa ispol'zovalis' pribory, ustanovlennye na ballonah. Odnako dlya bolee vysokih energii dannyi podhod ne goditsya, da i uzhe na sotnyah TeV hochetsya imet' chto-to bolee effektivnoe. Ploshad' detektora, ustanovlennogo na vozdushnom share, mala, a znachit mozhet okazat'sya, chto ni odnoi chasticy vysokoi energii v nego ne popadet ili, po krainei mere, ih budet nedostatochno dlya postroenii tochnogo spektra. Poetomu bylo by horosho ispol'zovat' nazemnye izmereniya. I sootvetstvuyushaya metodika byla razrabotana. Ideya metoda, predlozhennogo v 2001 godu Kiedoi s soavtorami, sostoit v tom, chto nado nablyudat' cherenkovskoe izluchenie pervichnoi chasticy. V sluchae nazemnyh izmerenii s pomosh'yu sistemy tipa H.E.S.S. my kak by imeem detektor s ploshad'yu v 100 000 kvadratnyh metrov (rabochim telom detekta vystupaet atmosfera). Poetomu mozhno registrirovat' izluchenie mnogih chastic s vysokimi energiyami. V rabote predstavleny rezul'taty issledovanii pochti 2000 sluchaev detektirovaniya pervichnogo izlucheniya chastic kosmicheskih luchei na ustanovke H.E.S.S. Udalos' vydelit' sobytiya, v kotoryh chasticei bylo yadro zheleza, i postroit' ih energeticheskii spektr v diapazone ot 13 do 200 TeV. Ozhidaetsya, chto v nedalekom budushem udast'sya protyanut' spektr i dal'she, v oblast' bolee vysokih energii.
Authors: Avery E. Broderick, Ramesh Narayan Comments: 11 pages, 4 figures, Classical and Quantum Gravity, Volume 24, Issue 3, pp. 659-666 (2007) Gravizvezdy - eto takaya dovol'no strannaya al'ternativa chernym dyram. Po pravde skazat', vse al'ternativy chernym dyram vyglyadyat stranno, tak chto sredi nih gravizvezdy vpolne tak sebe normal'ny :). Avtory obsuzhdayut, kak dannye po akkreciruyushim (ili akkrecirovavshim) chernym dyram mogut zakryt' model' gravizvezd, ili zotya by sil'no ee ogranichit'.
Authors: Jacob D. Bekenstein Comments: Pedagogical introduction to MOND and review of modern developments. To appear shortly in Contemporary Physics; LaTeX with 6 figures, 15 pages Pozhalui, imenno blagodarya rabotam (i avtoritetu) Bekenshteina, modificirovannaya gravitaciya stala v poslednie gody ves'ma populyarnoi, tochnee rech' idet o podhode, predlozhennom samim Bekenshteinom i nazyvaemom TeVeS. V stat'e daetsya pdrobnyi i v meru dostupnyi obzor vo vsyu etu tematiku. Vsem interesuyushimsya nastoyatel'no rekomenduetsya.
Obsudit' v ZhZh-soobshestve
ru_astroph.
Authors: R. Moreno et al. Comments: 2 pages, Second workshop on Mars atmosphere modelling and observations, held February 2 7 - March 3, 2006 Granada, Spain. Edited by F. Forget, M.A. Lopez-Valverde, M.C. Desjean, J.P. Huot, F. Lefevre, S. Lebonnois, S.R. Lewis, E. Millour, P.L. Read and R.J. Wilson. Publisher : LMD, IAA, AOPP, CNES, ESA, 2006., p.134, Espagne (2006) Srednyaya atmosfera sootvetstvuet vysotam ot 40 do 80 km. Okazyvaetsya, chto ee mozhno aktivno i uspeshno izuchat' s pomosh'yu nazemnyh teleskopov. Eto dostigaetsya ispol'zovaniem interferometrov, rabotayushih v millimetrovom diapazone. Osnovnym rezul'tatom, predstavlennym v stat'e, yavlyaetsya regulyarnoe nablyudenie sil'nyh (100 m/s) vetrov v ekvatorial'noi oblasti.
My budem starat'sya hotya by perechislit' interesnye (dlya shirokoi publiki) stat'i, poyavivshiesya v razdele physics (vklyuchaya cross-listing).
Authors: Michael Schreiber Comments: 6 pages, 6 figures, submitted to EPL Obsuzhdaetsya, kak samocitirovanie vliyaet na indeks Hirsha. Na konkretnyh (no anonimnyh) primerah pokazano, chto vliyanie dostatochno veliko. Konechno, dlya uchenyh s bol'shim indeksom (t.e. kogda ssylok ochen' mnogo) vliyainie samocitirovaniya nahoditsya na urovne neskol'kih procentov, no pri malom indekse samocitirovanie mozhet byt' opredelyayushim. (Voobshe govorya, na moi vzglyad, ves' analiz citiruemosti, na kakom by parametre eto vse ni osnovyvalos', dolzhen provodit'sya s uchetom samocitiruemosti, t.e., poprostu govorya, samossylki nado vykidyvat'. Prichem imeyutsya vvidu ne tol'ko ssylki avtora na samogo sebya, no i ssylki soavtorov po dannoi stat'e na dannuyu zhe stat'yu.) Krome togo, v stat'e privoditsya dostatochno polnoe obsuzhdenie indeksa Hirsha, i daetsya horoshaya bibliografiya po rabotam, svyazannym s dannym pokazatelem aktivnosti uchenogo.
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