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| 13.09.02. astro-ph za 9 - 13 sentyabrya 2002 goda: izbrannye stat'i |
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Rentgenovskie luchi ispuskayut samye raznye ob'ekty. Konechno, akkreciruyushie neitronnye zvezdy svetyat v rentgene intensivnee, chem Luna. No.... V stat'e daetsya obzor po rentgenovskomu izlucheniyu ot ob'ektov Solnechnoi sistemy: planet, ih sputnikov, komet i t.d.
Authors: Avery Broderick, Roger Blandford Comments: To appear in the proceedings of the Amsterdam Circular Polarisation workshop Razvit podhod dlya opisaniya perenosa izlucheniya v magnitoaktivnoi plazme s uchetom effektov OTO. Eto vazhno v pervuyu ochered' dlya rascheta akkrecionnyh potokov v okrestnostyah kompaktnyh ob'ektov (neitronnyh zvezd i chernyh dyr).
Authors: Duncan A. Forbes Comments: 8 pages, Latex, 3 figures, To appear in the proceedings of New Horizons in Globular Cluster Astronomy ed. G. Piotto, G. Meylan, G. Djorgovski, M. Riello, ASP Conference series Kosmicheskii teleskop pozvolyaet izuchat' sharovye skopleniya v drugih galaktikah (voobshe, eti ob'ekty yavlyayutsya samymi mnogochislennymi sredi vseh, dostupnyh dannomu instrumentu). V obzore privedeny dannye takih nablyudenii, a takzhe rezul'taty sravnenii parametrov sharovyh skoplenii v drugih galaktikah s nashimi.
Authors: Madappa Prakash et al. Comments: pages, 1 figure, uses espcrc1.sty (included) Izvestie o tom, chto istochniki RX J185635-3754 i 3C58 mogut byt' kvarkovymi zvezdami dolgo budorazhilo sredstva massovoi informacii (sm. sootvetstvuyushie raz'yasneniya na Astronete i Scietific.Ru). V korotkoi zametke izvestnye specialisty po vnutrennemu stroeniyu neitronnyh zvezd obsuzhdayut vozmozhnosti nablyudatel'nyh proyavlenii (i, sootvetstvenno, ih registracii) kvarkovyh zvezd.
Authors: A. Del Popolo Comments: 34 pages. Invited review, Research Signpost Ocherednoi obzor po temnoi materii i blizkim voprosam. Obsuzhdaetsya rol' temnoi materii razlichnogo tipa v formirovanii i evolyucii krupnomasshtabnoi struktury.
Authors: Francesca Matteucci, Antonio Pipino Comments: 6 pages, 3 figures, to appear in the Proceedings of IAU Symposium No. 212 'A Massive Star Odissey, from Main Sequence to Supernova' Rassmotrena rol' sverhnovyh razlichnogo tipa v evolyucii mezhzvezdnoi sredy v ellipticheskih galaktikah, a takzhe v evolyucii mezhgalakticheskoi sredy. Na rannih etapah sushestvovaniya ellipticheskim galaktikam svoistvenno ochen' burnoe zvezdoobrazovanie. Obrazuyushiesya massivnye zvezdy bystro vzryvayutsya kak sverhnovye. Pri etom okazalos', chto imenno sverhnovye vtorogo tipa dayut osnovnoi vklad v obogashenie mezhzvezdnoi sredy tyazhelymi elementami. A vot dlya mezhgalakticheskoi sredy vazhnee sverhnovye tipa Ia.
Authors: John F. Beacom Comments: Invited talk at the XXth International Conference on Neutrino Physics and Astrophysics (Neutrino 2002), Munich, Germany, May 25-30, 2002 Daetsya obzor neitrinnoi fiziki i astrofiziki v prilozhenii k vspyshkam sverhnovyh. Krome etogo predstavleny original'nye rezul'taty, kasayushiesya detektiroaniya neitrino ot sverhnovyh.
Authors: Craig J. Copi, Glenn D. Starkman Comments: 10 pages, 2 figures, AASTeX5, submitted to ApJ Stat'ya posvyashena uluchsheniyu uglovogo razresheniya pri rentgenovskih nablyudeniyah. Metodika polucheniya vysokogo razresheniya osnovana na pokrytii nablyudaemogo ob'ekta. Takim sposobom (pri pokrytii Lunoi) pol'zovalis' na zare rentgenovskoi astronomii. Teper' u metoda mozhet poyavit'sya vtoroe dyhanie. Dlya realizacii dannogo podhoda predlozhen special'nyi sputnik: X-ray Occulting Steerable Satellite (XOSS).
Authors: S. T. Maddison et al. Comments: 4 pages, 2 figures. To appear in the ASP Conference Series: Scientific Frontiers in Research on Extrasolar Planets, eds. D. Deming and S. Seager. Movies available from http://astronomy.swin.edu.au/maddison/research/dust/ Sozdana programma, rasschityvayushaya evolyuciyu gazovo-pylevyh potokov. Osnovnoe vozmozhnoe primenenie - raschet obrazovaniya planet.
Authors: Mario Hamuy Comments: 25 pages, 7 figures, accepted for Part 1 of Astrophysical Journal Avtor analiziruet fotometricheskie i spektroskopicheskie dannye o 24 sverhnovyh vtorogo tipa. Opredelyayutsya takie parametry kak energetika vzryva, massy i radiusy predsverhnovyh. Poluchaetsya, chto bolee massivnye predsverhnovye dayut bolee moshnye vzryvy. Bolee moshnye sverhnovye dayut bol'she nikelya. Pohozhie sootnosheniya est' dlya sverhnovyh tipov Ib/c, chto mozhet govorit' o tom, chto fizika tam pohozhaya.
Authors: V. Luridiana Comments: 8 pages, 1 figure. Moriond Latex style. To be published in the proceedings of the XXXVIIth Moriond Astrophysics Meeting "The Cosmological Model", Les Arcs, France, March 16-23, 2002 Obilie pervichnogo geliya - vazhneishii parametr v sovremennoi astrofizike. Opredelyaetsya eta velichina ploho: raznye gruppy dayut ochen' raznye rezul'taty. Hotya v poslednee vremya nametilsya progress. V obzore obsuzhdayutsya razlichnye metody opredeleniya obiliya pervichnogo geliya. Privodyatsya novye rezul'taty i rassmatrivayutsya prichiny razlichiya rezul'tatov raznyh grupp (sm. takzhe astro-ph/0209240, gde obsuzhdaetsya evolyuciya soderzhaniya deiteriya i izotopov geliya v nashei Galaktike).
Authors: Lars Hernquist, Volker Springel Comments: 17 pages, 13 figures, submitted to MNRAS Sdelana popytka postroeniya analiticheskoi modeli istorii zvezdoobrazovaniya vo Vselennoi. Rezul'taty modeli sravnivayutsya s rezul'tatami chislennyh raschetov. Grubo govorya, v molodoi Vselennoi plotnost' zvezdoobrazovaniya eksponencial'no rastet s umen'sheniem krasnogo smesheniya. Zatem, dostignuv maksimuma, zvezdoobrazovanie zatuhaet. Zdes' temp zamedleniya sovpadaet s tempom ohlazhdeniya v galo.
Authors: Andrew Cumming Comments: 4 pages, 1 figure, to appear in the proceedings of the 13th European Workshop on White Dwarfs Obsuzhdaetsya evolyuciya magnitnogo polya akkreciruyushih belyh karlikov. Pokazano, chto harakternoe vremya omicheskoi dissipacii sostavlyaet poryadka 7-12 milliardov let i malo zavisit ot massy ili temperatury yadra. Esli temp akkrecii prevoshodit 1-5 10-10 mass solnca v god, to eto sushestvenno vliyaet na strukturu magnitnogo polya. Rassmatrivayutsya prilozheniya poluchennyh rezul'tatov k nablyudaemym akkreciruyushim belym karlikam v dvoinyh sistemah raznyh tipov.
Authors: Andrew Cumming, Geoffrey W. Marcy, R. Paul Butler, Steven S. Vogt Comments: 4 pages, 2 figures, to appear in Scientific Frontiers in Research on Extrasolar Planets (ASP Conference Series) Nazvanie govorit samo za sebya. V Kekovskom obzore polucheny dannye o luchevyh skorostyah 580 zvezd. Obsuzhdaetsya, kakie rezul'taty otnositel'no parametrov ekzoplanet mozhno iz etogo poluchit'.
Authors: F. P. Gavriil, V. M. Kaspi, P. M. Woods Comments: 14 pages, 2 figures, accepted for publication in Nature. Note: The content of this paper is embargoed until 1900 hrs London time / 1400 US Eastern Time on Sept 11 Opisyvaetsya otkrytie dvuh rentgenovskih vspyshek ot anomal'nogo rentgenovskogo pul'sara 1E 1048-5937. Vspyshki ochen' pohozhi na vspyshki istochnikov povtoryayushihsya gamma-vspleskov. Eto delaet eshe bolee veroyatnoi tesnuyu svyaz' mezhdu anomal'nymi rentgenovskimi pul'sarami i istochnikami povtoryayushihsya gamma-vspleskov.
Authors: Vicent J. Martinez, Enn Saar Comments: 15 pages, 7 figures, uses spie.cls (included). This paper will be published in SPIE Proceedings Vol. 4847, 2002, "Astronomical Data Analysis II," J.-L. Stark and F. Murtagh, eds., and is made available as an electronic preprint with permission of SPIE Poskol'ku odnim iz vazhneishih kosmologicheskih testov yavlyayutsya dannye po krupnomasshtabnoi strukture, to ochen' polezno predstavlyat' kak zhe poluchayutsya kolichestvennye dannye v etoi oblasti. V obzore opisyvayutsya osnovnye metodiki, primenyaemye v kosmologii dlya opisaniya statistiki galaktik i ih skoplenii.
Authors: M. Sereno Comments: 8 pages, 6 figures, A&A in press Po mneniyu avtora, sil'noe linzirovanie na skopleniyah galaktik mozhet dat' vazhnuyu informaciyu o kosmologicheskih parametrah. Znaya polnuyu massu skopleniya i ee raspredelenie, mozhno, naprimer, otvetit' na vopros uskoryaetsya ili zamedlyaetsya rasshirenie Vselennoi, takzhe mozhno uznat' uravnenie sostoyaniya temnoi energii. Dan primer rassmotreniya konkretnoi sistemy - skopleniya CL 0024+1654. Rezul'taty okazyvayutsya v sootvetstvii s uzhe standartnoi model'yu ploskoi uskoryayusheisya Vselennoi, v kotoroi dominiruet temnaya energiya.
Authors: M. Bersanelli, D. Maino, A. Mennella Comments: 81 pages, 16 figures. Submitted to "La Rivista del Nuovo Cimento" Dan obzor sovremennogo sostoyaniya del v issledovanii anizotropii reliktovogo izlucheniya. Opisyvayutsya budushie programmy (sputniki, ballonnye eksperimenty i t.d.).
Authors: E.P.Mazets et al. Comments: 12 pages, including 4 tables, LaTeX AASTeX5.0, with 84 PNG files of reduced size figures. Catalog with full size figures is available at http://www.ioffe.ru/LEA/shortGRBs/Catalog/ To be submitted to the ApJ(Suppl.) Katalog korotkih gamma-vspleskov, zaregistrirovannyh s 1994 po 2002 gg. v eksperimente GGS-Wind Konus. V kataloge privedeny dannye o 130 sobytiyah.
Authors: Feryal Ozel, Dimitrios Psaltis Comments: 8 pages, submitted to The Astrophysical Journal Letters Na profili spektral'nyh linii, izluchaemye neitronnymi zvezdami, vliyaet mnozhestvo effektov teorii otnositel'nosti. Sootvetstvenno, poluchiv izmereniya linii, mozhno srazu zhe uznat', naprimer, massu i radius neitronnoi zvezdy. K sozhaleniyu, poka takie linii uvidet' ne udalos'. Delo za nablyudatelyami.
Authors: Andrei M. Beloborodov Comments: submitted to ApJ Letters V astrofizike vysokih energii vse chashe vspominayut o neitronah (hotya eshe poltora goda nazad bylo nemnogo udivitel'no slyshat' doklad Derisheva v Peterburge). V svoei stat'e Andrei Beloborodov rassmatrivaet rol' neitronov v gamma-vspleskah. Po ego mneniyu prisutstvie sushestvennogo kolichestva neitronov v vybrose mozhet sushestvenno izmenit' dinamiku vspleska. Neitrony privodyat k zamedleniyu vybrosa. Krome togo, nalichie neitronov mozhet privodit' k uyarchaniyu na vremenah poryadka neskol'kih dnei (chto i nablyudaetsya). (Takzhe sm. astro-ph/0209231 o roli neitral'nyh chastic - neitronov, fotonov, neitrino - v dzhetah blazarov).
Authors: Carles Badenes, Eduardo Bravo Comments: 4 pages, 3 figures. Proceedings of the ESO/MPA/MPE Workshop 'From Twilight to Highlight', the Physics of Supernovae. Garching July 29 - 31, 2002 Konkretnye mehanizmu vspyshek sverhnovyh raznyh tipov ostayutsya neizvestnymi. Avtory pytayutsya vytashit' kakuyu-to informaciyu ob etom iz nablyudayushihsya ostatkov sverhnovyh. Oni rassmatrivayut spyshki tipa Ia. Stroitsya gidrodinamicheskaya model' vzaimodeistviya vybrosa s okruzhayushei sredoi. Avtory pytayutsya naiti horoshie indikatory, kotorye pozvolili by na osnovanii sravneniya nablyudaemyh ostatkov s raschetnymi sdelat' vybor mezhdu razlichnymi mehanizmami vspyshki. Delo eto neprostoe. Poka postroena odnomernaya model'. Vryad li ona polnost'yu otrazhaet vsyu slozhnuyu kartinu vzryva i razleta obolochki.
Authors: Aake Nordlund, Paolo Padoan Comments: 28 pages, 13 figures, invited tutorial for the workshop "Simulations of Magnetohydrodynamic Turbulence in Astrophysics: Recent Achievements and Perspectives", Paris, July 2-6, 2001, Eds. Edith Falgarone & Thierry Passot Kak formiruetsya nachal'naya funkciya mass zvezd? Po vsei vidimosti ona neposredstvennym obrazom svyazana so svoistvami turbulentnosti v mezhzvezdnoi srede. Avtory rassmatrivayut vsyu cepochku: ot parametrov turbulentnosti do parametrov zvezd.
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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