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26.09.02. astro-ph za 23 - 26 sentyabrya 2002 goda: izbrannye stat'i | ||||
Est' dovol'no ustoyavsheesya mnenie, chto planety mogut sushestvenno izmenyat' svoi orbity na ranniyah stadiyah sushestvovaniya sistemy vsledstvie kakih-libo vneshnih vozdeistvii ili vzaimodeistviya drug s drugom. Avtory dayut obzor osnovnyh mehanizmov migracii planet i obsuzhdayut primenimost' etih mehanizmov kak ko mnozhestvu izvestnyh ekzoplanetnyh sistem, tak i k nashei Solnechnoi sisteme.
Authors: P. Hoeflich Comments: 14 pages+5 figures, in: Stellar Atmospheric Modeling, ASP Conference Series, eds. J. Hubeny, D. Mihalas & K. Werner Parallel'nye vychisleniya shagayut po planete! Odnako, obychno problema takova: da, parallel'nyi kod poschitaet bystree, no vremya, neobhodimoe na izuchenie metodov parallel'nogo scheta prevoshodit raznicu vo vremeni vychislenii na obychnom i na parallel'nom komp'yutere. V svoei stat'e avtor pytaetsya uprostit' etu zadachu dlya astrofizikov-pol'zovatelei i dat' nabor otnositel'no neslozhnyh receptov dlya rasparallelivaniya vychislenii zvezdnyh atmosfer.
Authors: R. Lynne Allen et al. Comments: AJ, in press Prakticheski vse iz bolee chem shesti soten ob'ektov poyasa Koipera nahodyatsya blizhe 50 a.e. Est' raznye mneniya, pochemu ne otkryvayutsya bolee dalekie ob'ekty. Krome ochevidnogo - ih prosto net - est' idei o tom, chto dinamicheskie svoistva ob'ektov dayut selekcionnyi effekt. Avtory provodyat poisk dalekih istochnikov. Rezul'tat otricatel'nyi, i avtory dayut vazhnye verhnie predely na parametry dalekih ob'ektov poyasa Koipera.
Authors: M. Takeda et al. Comments: submitted to Astroparticle Physics, 28pages, 16 figures, elsart.cls AGASA opravdyvaetsya. Gruppa pereschitala energii chastic, i po-prezhnemu nastaivaet na svoih rezul'tatah. T.e. govoryat, chto vse u nih pravil'no, i oni ne vidyat GZK-zavala. Budem zhdat' rezul'tatov Ozhe ...
Authors: M. Fellhauer, P.Kroupa Comments: 4 pages, no figures Omega Centavra - strannoe skoplenie. Avtory vyskazyvayut ideyu, chto eto sverhkompaktnaya karlikovaya galaktika. Podobnye ob'ekty obrazuyutsya pri sliyaniyah galaktik. Mozhno vosproizvesti Omega Centavra v rezul'tate chislennyh eksperimentov. Osnovnoi upor v stat'e sdelan kak raz na parametrah chislennyh modelei, privodyashih poyavleniyu ob'ektov tipa Omega Centavra.
Authors: D.P. Bennett et al. Comments: 7 pages with 13 figures, to be published in Proc. SPIE vol 4854, "Future EUV-UV and Visible Space Astrophysics Missions and Instrumentation"
Authors: E. Athanassoula Comments: 12 pages, 8 figures, includes gh2001-asp.sty, invited review paper for the 4th Guillermo Haro conference on "Disks of Galaxies: Kinematics, Dynamics and Perturbations" at Puebla, Mexico, ASP Conf. Series 275, eds. E. Athanassoula, A. Bosma & R. Mujica
Authors: Nozomu Kawakatu, Masayuki Umemura, Masao Mori Comments: 7pages,7figures,accepted for publication in ApJ Avtory stroyat model' evolyucii kvazara i ego galaktiki. Proslezhivaetsya kak izmenyaetsya otnositel'nye vklad chernoi dyry (kvazara) i galaktiki v obshuyu svetimost'. Stadyaei protokvazara avtory nazyvayut period intensivnogo rosta massy chernoi dyry. Dlitsya etot process neskol'ko soten millionov let. Po mneniyu avtorov radiogalaktiki yavlyayutsya vozmozhnymi kandidatami v takie protokvazary. Takzhe obsuzhdaetsya mesto drugih nablyudaemyh ob'ektov v dannoi kartine evolyucii sverhmassivnyh dyr i galaktik.
Authors: M.A. Garrett Comments: 11 pages, 5 figures, lecture presented at the NATA ASI VLBI School, Oct 2001. To be published in "The Role of VLBI in Astrophysics, Astrometry and Geodesy", ed. F. Mantovani. See www.evlbi.org for more information Sushestvuet neskol'ko krupnyh sistem interferometrov so sverhdlinnoi bazoi (VLBI): VN, VLBA, CMVA i APT/LBA. V stat'e podrobno obsuzhdayutsya evropeiskie sistemy (kotorye mogut rbotat' kak smostoyatel'no, tak i v sostave global'nyh sistem).
Authors: J. Kovac et al. Comments: 20 pages, 6 figures Opisyvaetsya otkrytie polyarizacii reliktovogo izlucheniya na ustanovke DASI. Otkrytie vazhnoe. O nem uzhe mnogo napisano (sm., naprimer, zametku Mihaila Prohorova na Astronete). Rezul'tat bezuslovno nuzhdaetsya v podtverzhdenii. Polagayu, chto do nachala raboty sputnika Plank neskol'ko grupp eshe zayavyat ob obnaruzhenii polyarizacii mikrovolnovogo fona.
Authors: Weiqun Zhang, S. E. Woosley Comments: 8 pages, 3 figures, proceedings of 3D Stellar Evolution Workshop, Livermore, July, 2002
Authors: M. T. Murphy et al. Comments: Invited review at the XXII Physics in Collision Conference (PIC02), Stanford, CA, USA, June 2002, 11 pages, LaTeX, 7 eps figures. PSN FRA T02 Daetsya obzor sovremennyh dannyh po izmereniyu variacii fundametal'nyh konstant po nablyudeniyam linii v spektrah kvazarov. Avtory polagayut, chto est' sil'nye ukazaniya (5 sigma) na nalichie variacii, no rezul'tat nuzhdaetsya, po ih mneniyu, v podtverzhenii. V svyazi s etim obsuzhdayutsya budushie nablyudeniya.
Authors: David D. Reid et al. Comments: pedagogical review, 37 pages Horoshii obzor po sovremennoi kosmologii.
Authors: A.D.Erlykin, A.A.Lagutin, A.W.Wolfendale Comments: 18 pages, 5 figures, accepted by Astropartoicle Physics Krome togo, chto neizvestno otkuda berutsya kosmicheskie luchi sverhvysokih energii (i est' li oni voobshe), my ne ochen' horosho ponimaem proishozhdenie obychnyh kosmicheskih luchei: neyasno chto inzhektiruet chasticy, neyasno kak oni uskoryayutsya. Hotya s poslednim voprosom situaciya poluchshe: vrode by luchi uchkoryayutsya v ostatkah sverhnovyh. Vdobavok ko vsemu etomu sushestvuet problema rasprostraneniya kosmicheskih luchei v Galaktike, osobenno v svyazi s neizvestnoi (v neobhodimyh melkih detalyah) strukturoi mezhzvezdnoi sredy i magnitnogo polya. Vot etomu-to voprosu i posvyashena rassmatrivaemaya stat'ya. Avtory zadayut fraktal'nuyu strukturu sredy i polya. Eto pomogaet reshit' nektorye problemy, naprimer problemu anomal'noi diffuzii, kotoraya neobhodima dlya sozdaniya galo kosmicheskih luchei (v etoi nauke termin galo imeet znachenie otlichnoe ot prinyatogo v zvezdnoi astronomii ili kosmologii - masshtaby drugie).
Authors: J. Craig Wheeler Comments: AAPT/AJP Resource Letter, American Journal of Physics, in press, 19 pages, 208 references Bibliograficheskii obzor po sverhnovym. Ssylki razbity na neskol'ko tem: nablyudeniya spektrov, spektropolyarimetriya, krivye bleska, teoriya termoyadernyh vzryvov, kollaps yadra, radioaktivnyi raspad, kosmologicheskie prilozheniya, svyaz' s gamma-vspleskami.
Authors: D. K. Kaplan, S. R. Kulkarni, M. H. van Kerkwijk Comments: 4 pages, 2 figures. Uses emulateapj5.sty, onecolfloat5.sty. Accepted by ApJ Letters Vsego dva ob'ekta iz "velikolepnoi semerki" radiotihih blizkih neitronnyh zvezd obnaruzheny v optike. Glubokie poiski na Kosmicheskom teleskope, vozmozhno, dali eshe odnogo opticheskogo dvoinika. Eto stalo vozmozhnym blagodarya nablyudeniyam istochnika na Chandre (u Chandry ochen' malen'kii boks oshibok). Kak i u drugih istochnikov opticheskii spektr lezhit vyshe chernotel'nogo prodolzheniya rentgenovskogo spektra. Eto mozhet ob'yasnyat'sya atmosferoi neitronnoi zvezdy.
Authors: S. R. Kulkarni, D. L. Kaplan, H. L. Marshall, D. A. Frail, T. Murakami, and D. Yonetoku Comments: 7 pages, 3 figures. Uses emulateapj5.sty, onecolfloat5.sty. Submitted to ApJ Anomal'nye rentgenovskie pul'sary (ARP) i istochniki myagkih povtoryayushihsya gamma-vspleskom (MPG) - bliznecy-brat'ya. Polagayut, chto oba tipa ob'ektov - magnetary. Nablyudeniya SGR 0526-66 na Chandre v spokoinom sostoyanii podtverzhdayut "rodstvo". Klassicheskii MPG vedet sebya seichas kak obychnyi ARP.
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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