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04.10.02. astro-ph za 27 - 04 oktyabrya 2002 goda: izbrannye stat'i |
SNAP - SuperNova/Acceleration Probe. Eto dvuhmetrovyi kosmicheskii teleskop. On budet snimat' dovol'no bol'shoe (primerno kvadratnyi gradus) pole v vidimom i IK diapazonah. Instrument imeet ochen' vysokie trebovaniya k optike i regitsriruyushei sisteme, chto i obsuzhdaetsya v stat'e. Obshii obzor proekta daetsya v soputstvuyushei rabote astro-ph/0209550. Cel' proekta - kosmologicheskie issledovaniya. A tochnee detal'noe izuchenie parametrov uskoreniya Vselennoi po nablyudeniyam sverhnovyh. Ozhidaetsya, chto budet polucheno bolee 2000 vysokokachestvennyh krivyh bleska i spektrov sverhnovyh pervogo tipa ot z=0.1 do 1.7. Etopozvolit dovol'no tochno opredelit' uravnenie sostoyaniya temnoi energii (esli6 konechno, teoretiki opyat' chto-nibud' ne pridumayut...).
Authors: A. Karle, for the IceCube Collaboration Comments: 8 pages, to be published with the proceedings of the XXth International Conference on Neutrino Physics and Astrophysics, Munich 2002 Opisyvaetsya proekt Ledyanoi Kub (IceCube). Eto neitrinnyi teleskop, kotoryi budet (tochno budet!) postroen v Antarktide. V stat'e rassmatrivaetsya kak obshii dizain teleskopa, tak i vozmozhnye istochniki neitrino, kotorye etot teleskop budet registrirovat'.
Authors: Diego F. Torres, Gustavo E. Romero, Thomas M. Dame, Jorge A. Combi, Yousaf M. Butt Comments: 82 pages + 23 JPEG figures Obychno govoryat o vzaimosvyazi gamma-vspleskov so vzryvami sverhnovyh. Zdes' rech' idet o drugom. V kataloge gamma-istochnikov pribora EGRET bol'shaya chast' yavlyaetsya neotozhdestvlennoi. Eto mogut byt' vnegalakticheskie istochniki, neitronnye zvezdy, chernye dyry. Vozmozhno, eti istochniki svyazany s ostatkami sverhnovyh. O poslednei gipoteze i idet rech' v obzore. Avtory obsuzhdayut rol' uskoreniya chastic kosmicheskih luchei v ostatkah sverhnovyh. Otmechu, odnako, chto nalichie korrelyacii s ostatkami sverhnovyh v chastnosti mozhet oznachat' svyaz' neotozhdestvlennyh istochnikov s molodymi neitronnymi zvezdami i chernymi dyrami, kotorye poyavilis' posle vzryvov, porodivshih i ostatki.
Authors: Pia Mukherjee, Ken Ganga, Bharat Ratra, Graca Rocha, Tarun Souradeep, Naoshi Sugiyama, Krzysztof M. G\'orski Comments: 25 pages, 10 figures, submitted to ApJ Seichas est' dannye mnozhestva eksperimentov po nablyudeniyu anizotropii reliktovogo fona. V svoei stat'e avtory analiziruyut ogranicheniya, nakladyvaemye etimi dannymi na kosmologicheskie parametry. Rassmatrivayutsya otkrytye i ploskie modeli.
Authors: Alwyn Wootten Opisyvaetsya budushii mezhdunarodnyi proekt teleskopa dlya millimetrovogo diapazona. Instrument budet sostoyat' iz 64 antenn, t.e. rabotat' budet v rezhime interferometra.
Authors: J. A. Tyson et al. Comments: 9 pages, 6 figures, for Proc. 5th International UCLA Symposium on Sources and Detection of Dark Matter, Marina del Rey, February 2002, ed. D. Cline Izvestno, chto seichas dannye, poluchennye po nablyudeniyam sverhnovyh i po anizotropii reliktovogo fona yavlyayutsya dvumya nezavisimymi argumentami v pol'zu uskoreniya rasshireniya Vselennoi. Okazyvaetsya, chto mozhno dobavit' eshe odin. Eto "tomografiya" skoplenii galaktik, poluchaemaya po nablyudeniyam slabogo linzirovaniya. Vmeste s dannymi po reliktovomu izlucheniyu tomografiya dast dovol'no tochnye (model'no nezavisimye) dannye o srednei plotnosti i doli veshestva.
Authors: Kristen Menou, Serge Tabachnik Comments: 38 pages, 7 tables, 7 figures, accepted for publication in ApJ Ponyatie "potencial'noi obitaemosti" klanety formuliruetsya kak uslovie vozmozhnosti sushestvovaniya zhidkoi vody. Dlya etogo, v chastnosti, nado, chtoby planeta nahodilas' na opredelennom arsstoyanii ot central'noi zvezdy, i chtoby drugie planety svoim vozmushayushim deistviem ne vyvodili planetu iz etoi zony. Avtory issleduyut orbity v 85 izvestnyh ekzoplanetnyh sistemah na predmet vypolneniya dannogo usloviya.Rezul'taty govoryat, chto lish' okolo chetverti iz rassmotrennyh sistem mogut soderzhat' planety v nuzhnyh zonah.
Authors: J.R. Bond et al. Comments: 20 pages, 8 figures, in Theoretical Physics, MRST 2002: A Tribute to George Libbrandt (AIP), eds. V. Elias, R. Epp, R. Myers Ocherednoi raz obsuzhdaetsya vopros o kosmologicheskih parametrah. Nikakih sensacii v stat'e net, odnako ona ves'ma horosho otrazhaet sovremennoe sostoyanie del.
Authors: A.E.Allahverdyan, V.G.Gurzadyan Comments: 8pages, J.Phys.A, 35 (2002) 7243-7254 Hotelos' by poobsuzhdat' etu stat'yu na forume. Avtory utverzhdayut, chto termodinamicheskaya strela vremeni pri nekotoryh usloviyah opredelyaetsya kosmologiei.
Authors: David Langlois Comments: 32 pages; 3 figures; Latex (PTPTeX); to appear in the Proceedings of the YITP workshop on "Braneworld - Dynamics of spacetime boundary" Obzor po brannoi kosmologii. Navernoe, podrobnee o nem napishet Sergei Pavlyuchenko.
Authors: J. W. Moffat Comments: 6 pages, LaTex file. No figures Eto doklad na special'noi sessii JENAM-2002, posvyashennoi variacii konstant. Rassmatrivayutsya dve kosmologicheskie teorii s peremennoi skorost'yu sveta. Pervaya model' yavlyaetsya al'ternativoi inflyacii. Vtoraya - dopuskaet "potemnenie" sverhnovyh, i, sootvetstvenno, daet al'ternativu uskoreniya rasshireniya Vselennoi.
Authors: Ann E. Hornschemeier Comments: 15 pages, 6 figures, Invited review for SPIE conference "Science with 6-10 m Class Telescopes" Obsuzhdaetsya vzaimodeistvie opticheskih i rentgenovskih nablyudenii. Dlya poiska opticheskih "dvoinikov" bol'shinstva slabyh rentgenovskih istochnikov, nablyudayushihsya na N'yutone i Chandre, nuzhna vsya mosh' 10-metrovyh teleskopov. Novoe pokolenie rentgenovskih intsrumentov brosit novyi vyzov optike. K etomu nado gotovit'sya zaranee...
Authors: P. Nisenson et al. Comments: To be published in P.A.S.P. Proceedings of Carnegie Meeting on Scientific Frontiers in Research on Extrasolar Planets, 4 pages, 3 figures Opisyvaetsya proekt teleskopa dlya nablyudeniya i spektroskopii ekzoplanet. Esli yupitery na rasstoyanii bolee 5 a.e. yavlyayutsya obychnym delom, to za tri goda raboty sputnik smozhet poluchit' spektral'nye dannye o neskol'kih desyatkah takih planet.
Authors: Guenter Sigl Comments: 31 latex pages, 7 ps figures; draft of a review for Annals of Physics, Comments, suggestions for improvements are highly appreciated Obzor po kosmicheskim lucham. Ob'yat' neob'yatnoe nel'zya, a potomu avtor koncentriruetsya na neskol'kih naibolee interesnyh dlya nego voprosah, kotorye v pervuyu ochered' svyazany s budushimi nablyudeniyami.
Authors: Frank Verbunt Comments: 10 pages, three figures, to appear in New Horizons in Globular Cluster Astronomy, Eds. Piotto et al., ASP Conf. Ser Sharovye skopleniya stali odnoi iz osnovnyh mishenei sputnikov Chandra i N'yuton. Eto privelo k sushestvennomu uvelicheniyu kolichestva izvestnyh rentgenovskih istochnikov. Frank Verbunt, odin iz vedushih issledovatelei v etoi oblasti, daet nebol'shoi, no ischerpyvayushii obzor obrazovaniya i evolyucii tesnyh dvoinyh sistem s neitronnymi zvezdami v sharovyh skopleniyah. Takzhe kratko obsuzhdayutsya sistemy s belymi karlikami i chernymi dyrami.
Authors: A.D. Schwope, H. Brunner, D. Buckley, J. Greiner, K. v.d. Heyden, S. Neizvestny, S. Potter, R. Schwarz Comments:Astronomy and Astrophys., in press, 17 pages, 19 figures, full paper with finding charts at http://www.aip.de/People/ASchwope/axels_papers.html "Navstrechu perepisi naseleniya!" Avtory predstavlyayut perepis' kataklizmicheskih peremennyh (eto tesnye dvoinye s belymi karlikami) po dannym nablyudenii v rentgenovskom diapazone na sputnike ROSAT.
Authors: N. Prantzos Comments: 12 pages, 8 figures. Invited talk in "Galaxy Evolution III: From Simple Approaches to Self-Consistent Models" (Kiel, Germany, July 16-20, 2002) Eds. G. Hensler et al., in press Rassmatrivaetsya postroenie modelei evolyucii diskovyh galaktik, v pervuyu ochered' - nashego Mlechnogo Puti. Predstavleny rezul'taty modelirovaniya: sinteticheskie spektry, razlichnye korrelyacii mezhdu parametrami i t.d.
Authors: V.Berezinsky, A.Z.Gazizov, S.I.Grigorieva Comments: 4 pages, 1 figure Avtory utverzhdayut, chto est' kosvennye osnovaniya govorit', chto kosmicheskie luchi s energiyami vyshe 1020eV rozhdayutsya v aktivnyh yadrah galaktik. Dannye o korelyaciyah plohie, i osnovnoi vyvod v dannoi stat'e delaetsya na analize spektra kosmicheskih luchei i ego sravnenii s model'nymi spektrami. Konechno, vse ponimayut, chto poka dannyh dlya okonchatel'nyh vyvodov malo, i nam pridetsya zhdat' rezul'tatov eksperimenta Ozhe.
Arhiv statei, voshedshih v predydushie vypuski.
Razdely arhiva (s iyulya 2002 g.): Poleznye astronomicheskie ssylki. Obzornye stat'i v astro-ph s 2001 g. |
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