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The R.A.P.Project "Prosto o slozhnom" "Astro-ph za vtoruyu polovinu 2003 g." Nemnogo statistiki Predydushii vypusk (N87) Slovar' astroterminov Spisok missii i teleskopov Obzory UFN Stat'i SOZh ANKa Dnya 11.10.2004. N'yuton smotrit na M31 05.10.2004. Million sekund Kassiopei A 18.09.2004. Rozhdenie lacertidy 16.09.2004. Planeta okolo korichnevogo karlika Soderzhanie i bystryi perehod k razdelam obzora Stat'i nedeli "Luchshie iz luchshih" astro-ph/0410229 Obnaruzhenie molekulyarnogo gaza v materinskoi galaktike kvazara na krasnom smeshenii z=6.42 astro-ph/0410319 Opticheskaya tolsha po mikrolinzirovaniyu v napravlenii na baldzh Galaktiki astro-ph/0410343 Poslesvechenie ot sliyaniya massivnyh chernyh dyr Otdel'nye stat'i Himicheskii sostav Solnca Issledovanie neizvestnogo Vozmozhnyi tretii komponent v sisteme dvuh korichnevyh karlikov DENIS-P J020529.0-115925 Obnaruzhenie molekulyarnogo gaza v materinskoi galaktike kvazara na krasnom smeshenii z=6.42 Kosmologicheskie modeli dlya mira na brane SN 1987A: neobychnyi vzryv normal'noi sverhnovoi tipa II Kruche, polozhe ili "tochnyi Solpiter"? Dannye na osnovanii evolyucii galaktik i skoplenii galaktik Rekonstrukciya evolyucii dvoinyh belyh karlikov: novyi zakon sblizheniya na stadii s obshei obolochkoi Sud'ba svyazannyh sistem v kosmologiyah s fantomnoi temnoi energiei i kvintessenciei Seismologiya akkreciruyushih belyh karlikov Diagnostika diskov vokrug goryachih zvezd Opticheskaya tolsha po mikrolinzirovaniyu v napravlenii na baldzh Galaktiki po dannym MACHO Vozdeistvie massivnyh zvezd na nachal'nuyu funkciyu mass Mikrolinzirovanie v galakticheskom baldzhe po dannym MACHO Poslesvechenie ot sliyaniya massivnyh chernyh dyr Gamma-vspleski i plavlenie veshestva pod deistviem rentgenovskogo izlucheniya kak vozmozhnyi istochnik hondr i planet Iz razdela physics 12th International Congress on Plasma Physics Atomnye chasy i ogranicheniya na izmenenie fundamental'nyh konstant 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.): kosmologiya, neitrino, kosmicheskie luchi i gamma-astronomiya, galaktiki, AYaG, kvazary, nasha Galaktika, mezhzvezdnaya sreda, zvezdy, sverhnovye, ostatki sverhnovyh, chernye dyry, neitronnye zvezdy, linzirovanie, Solnce, ekzoplanety, Solnechnaya sistema, akkreciya, tesnye dvoinye sistemy, gamma-vspleski, gravitacionnye volny, mehanizmy izlucheniya, chislennoe modelirovanie, dinamika, mehanika metody obrabotki dannyh, MGD, metody nablyudenii, budushie nablyudatel'nye proekty, prochee. Poleznye astronomicheskie ssylki. Korotkoe esse ob elektronnyh preprintah. Obzornye stat'i v astro-ph s 2001 g. Obsudit' na forume Scientific.RU Obsudit' na forume Zvezdocheta Avtory proekta Sergei Popov Mihail Prohorov Postav'te u sebya nashu knopku! Proekt razmeshen na saitah: Vy mozhet takzhe razmestit' na svoem saite nashu lentu obzorov Novostnye lenty Novosti astronomii ot PRAO Tekushie otkrytiya v FECh Novosti kosmonavtiki Novosti ot UFN Informnauka Perst Podpiska na rassylku obzorov na Subscribe.Ru Druzhestvennye rassylki: "Astronomiya dlya shkol'nikov" Zamechatel'nyi sait Astronomiya i teleskopostroenie Novosti nauki na Grani.Ru

Obzory preprintov astro-ph Vypusk N88 astro-ph za 11 - 17 oktyabrya 2004 goda: izbrannye stat'i Referaty otdel'nyh statei miniobzor astro-ph/0410214 Himicheskii sostav Solnca (The solar chemical composition) Authors: Martin Asplund, Nicolas Grevesse, Jacques Sauval Comments: Invited review presented at "Cosmic abundances as records of stellar evolution and nucleosynthesis", F.N. Bash & T.G Barnes(editors). ASP conf. series, in press Obzor posvyashen samym sovremennym dannym o himicheskom sostave Solnca, poluchennym po izmereniyam linii poglosheniya v spektre nashego dnevnogo svetila. Spektry, konechno, v obshem-to te zhe, chto i ran'she. No sam spektr neposredstvenno ne daet vam informacii o sostave. Neobhodimo stroit' model'. Eti modeli stanovyatsya vse bolee sovershennymi, a potomu poyavlyayutsya i novye bolee tochnye rezul'taty. Prichem izmeneniya dostatochno sushestvenny. Tak soderzhanie "metallov" teper' ocenivaetsya primerno v dva raza nizhe, chem schitalos' ranee. astro-ph/0410225 Issledovanie neizvestnogo (The Exploration of the Unknown) Authors: P. N. Wilkinson et al. Comments: 14 pages, 2 figures in 2 PostScript files; to appear in "Science with the Square Kilometer Array," eds. C. Carilli and S. Rawlings, New Astronomy Reviews (Elsevier: Amsterdam) Eto ocherednaya stat'ya iz trudov konferencii, posvyashennoi SKA - Square Kilometer Array. Avtory dayut obzor proekta, rassuzhdaya o tom, chto SKA vazhen ne kak instrument, kotoryi reshit kakie-to iz stoyashih seichas voprosv, a kak pribor, chto postavit pered nami novye voprosy. A ved' imenno tak i dvizhetsya progress. astro-ph/0410226 Vozmozhnyi tretii komponent v sisteme dvuh korichnevyh karlikov DENIS-P J020529.0-115925 (A possible third component in the L dwarf binary system DENIS-P J020529.0-115925 discovered with the Hubble Space Telescope) Authors: H.Bouy et al. Comments: 15 pages, 3 tables, 6 figures, accepted for publication in AJ. High resolution version available at ftp://ftp.mpe.mpg.de/people/hbouy/publications/denis0205.ps.gz Vozmozhno obnaruzhena pervaya troinaya sistema korichnevyh (buryh) karlikov. Dva kompan'ona vidny absolyutno dostoverno, i est' podozreniya, chto odin iz nih takzhe dvoinoi. astro-ph/0410229 Obnaruzhenie molekulyarnogo gaza v materinskoi galaktike kvazara na krasnom smeshenii z=6.42 (Resolved Molecular Gas in a Quasar Host Galaxy at Redshift z=6.42) Authors: F. Walter et al. Comments: ApJ letters, Nov 2004, accepted Kvazar SDSS J1148+5251, nahodyashiisya na z=6.42, yavlyaetsya samym dalekim (iz chisla ob'ektov s dostovernym krasnym smesheniem). Avtory proveli nablyudeniya etogo istochnika na VLA. Ispol'zovalas' chastota, sootvetstvuyushaya odnomu iz perehodov v molekule SO. Razreshenie sostavlyalo 0.17'' x 0.13'', chto sootvetstvuet primerno 1 kpk dlya dannoi dalekoi galaktiki. Avtoram udalos' razreshit' (t.e. rassmotret') strukturu raspredeleniya molekulyarnogo gaza v stol' dalekom ob'ekte! Blagodarya etomu udalos' opredelit' massu gaza, a takzhe polnuyu dinamicheskuyu massu v ob'eme, zanimaemom gazom. I zdes', vozmozhno, taitsya deistvitel'no vazhnoe otkrytie. Delo v tom, chto seichas po izmereniyam bolee blizkih galaktik s chernymi dyrami izvestno sootnoshenie mezhdu massoi central'noi chernoi dyry i massoi baldzha (sfericheskoi sostavlyayushei galaktiki). Tak vot, dlya ob'ekta, issledovannogo v etoi stat'e, takoe uslovie vidimo ne vypolnyaetsya. Eto mozhet oznachat', chto chernye dyry formiruyutsya ran'she baldzha (t.e. nastol'ko rano, chto dazhe massa dlya formirovaniya baldzha eshe ne sobrana). miniobzor gr-qc/0410032 Kosmologicheskie modeli dlya mira na brane (Braneworld Cosmological Models) Authors: E. Papantonopoulos Comments: Talk given at Pascos04/Nath Fest, Boston, August 16-22, 2004, 11 pages, no figures Korotkie obzor, v kotorom predstavleny osnovnye kosmologicheskie modeli dlya mira na brane. Vnimanie: obzor korotkii, no formul mnogo! miniobzor astro-ph/0410275 SN 1987A: neobychnyi vzryv normal'noi sverhnovoi tipa II (SN 1987A: The Unusual Explosion of a Normal Type II Supernova) Authors: Nino Panagia Comments: [8 pages, 6 figures] Invited talk presented at the International Conference "1604-2004 Supernovae as Cosmological Lighthouses" (Padova, Italy, June 16-19, 2004), (San Francisco: ASP), in press Nebol'shoi obzor, posvyashennoi sverhnovoi 1987A. Kratko opisany vse osnovnye otkrytiya, svyazannye s samoi izvestnoi (posle Kraba) sverhnovoi. Veroyatno ne vse otsledili interesnye nablyudeniya, svyazannye s izmeneniyami v strukture vnutrennego kol'ca sverhnovoi. Sovetuem obratit' vnimanie na vtoruyu chast' stat'i (s razdela 8). astro-ph/0410295 Kruche, polozhe ili "tochnyi Solpiter"? Dannye na osnovanii evolyucii galaktik i skoplenii galaktik (Steeper, Flatter, or Just "Salpeter"? Evidence from Galaxy Evolution and Galaxy Clusters) Authors: Alvio Renzini Comments: 10 pages, 7 figures Vopros o tom, kakuyu formu i naklon imeet nachal'naya funkciya mass zvezd pri ih obrazovanii, yavlyaetsya interesnoi astrofizicheskoi problemoi. Edinaya dlya vseh mass stepennaya "Solpiterovskaya" funkciya primerno v 2 raza zavyshaet nablyudaemoe v galaktikah otnoshenie massy k svetimosti (M/L). [V "strogom" smysle Solpiterovskim nazyvaetsya sleduyushee raspredelenie: dN/dM ~ M-2.35.] Takim obrazom, v oblasti zvezd s massami men'she solnechnoi eta funkciya dolzhna stanovit'sya bolee pologoi. Odnako Solpiterovskaya funkciya uspeshno ob'yasnyaet mnogo faktov, kasayushihsya massivnyh zvezd. Naprimer, Solpiterovskii zakon v oblasti 1<M<40Mo sootvetstvuet nablyudeniyam: on predskazyvaet izbytok proizvedennyh zvezdami tyazhelyh elementov (kisloroda i kremniya) v skopleniyah galaktik. Takzhe uspeshno ob'yasnyaetsya evolyuciyu ellipticheskih galaktik v skopleniyah. T.o. solpiterovskaya funkciya uspeshno ob'yasnyaet nablyudeniya dlya zvezdnym mass >1 solnechnoi. astro-ph/0410301 Rekonstrukciya evolyucii dvoinyh belyh karlikov: novyi zakon sblizheniya na stadii s obshei obolochkoi (Reconstructing the evolution of white dwarf binaries: further evidence for an alternative algorithm for the outcome of the common-envelope phase in close binaries) Authors: G. Nelemans and C.A. Tout Comments: 13 pages, 8 figures, accepted in MNRAS Kogda odna iz zvezd v tesnoi dvoinoi sisteme zapolnyaet svoyu polost' Rosha i po kakim-libo prichinam (naprimer, iz-za bol'shogo otnosheniya mass v sisteme) nachinaet peretekat' na vtoruyu komponentu v ochen' vysokom tempe, stol' vysokom, chto vtoraya zvezda ne uspevaet eto veshestvo prinimat', to vokrug sistemy mozhet obrazovat'sya obshaya obolochka. Na stadii s obshei obolochkoi komponenty dvoinoi sistemy ochen' sil'no sblizhayutsya (v desyatki raz za vremya vsego lish' v neskol'ko desyatkov tysyach let). Na neobhodimost' sushestvovaniya podobnogo processa dlya ob'yasneniya obrazovaniya osobo tesnyh dvoinyh sistem ukazal v 1976 godu Bogdan Pachin'skii. A v 1984 godu Vebbink (Webbink) pridumal opisyvayushuyu etot process energeticheskuyu (ili α) formulu ΔEenv = α x ΔEorb. Etoi formuloi pol'zuyutsya do sih por, hotya inogda ona ne ob'yasnyaet nablyudaemyh yavlenii. V dannoi rabote avtory predlozhili drugoi zakon, opisyvayushii sblizhenie zvezd na stadii s obshei obolochkoi. On osnovyvaetsya na zakone sohraneniya uglovogo momenta ΔJ/J = &gamma x ΔM/M. Avtory utverzhdayut, chto s pomosh'yu odnogo (dlya vseh sistem) koefficienta γ im udalos' opisat' vse nablyudaemye yavleniya. astro-ph/0410309 Sud'ba svyazannyh sistem v kosmologiyah s fantomnoi temnoi energiei i kvintessenciei (The Fate of Bound Systems in Phantom and Quintessence Cosmologies) Authors: S. Nesseris, L. Perivolaropoulos Comments: 9 two-column pages, 8 figures. The mathematica file for the numerical analysis of the paper is available at http://leandros.physics.uoi.gr/bigrip.htm Vse pomnyat, kakoi byl rezonans posle publikacii pervyh rabot po Bol'shomu razryvu. V dannoi rabote avtory predstavlyayut novyi analiz, prodolzhayushii raschety Caldwell & Co. Ochen' hochetsya predvarit' opisanie rezul'tatov frazoi v duhe "Bol'shoi razryv nastupit namnogo ran'she". Da, rezul'taty svodyatsya k tomu, chto Razryv, skazhem, Mlechnogo Puti proizoidet na 60 millionov let ran'she, chem po raschetam Caldwell i dr. Odnako, uchityvaya, chto rech' idet o milliardah let, bespokoit'sya ne o chem. Podrobnee o modeli s Bol'shim Razryvom mozhno prochest' zdes'. astro-ph/0410313 Seismologiya akkreciruyushih belyh karlikov (Seismology of Accreting White Dwarfs) Authors: Phil Arras, Dean Townsley, Lars Bildsten Comments: 6 pages, 2 figures. Pul'sacii akkreciruyushih belyh karlikov, vhodyashih v sostav nekotoryh kataklizmicheskih peremennyh, byli zaregistrirovany dostatochno nedavno (eto slozhnaya nablyudatel'naya zadacha). V principe, po takim kolebaniyam mozhno izuchat' vnutrennyuyu strukturu pul'siruyushih zvezd. No poka v etoi oblasti poluchen tol'ko odin rezul'tat: dlya sistemy GW Lib na osnove izucheniya ee pul'sacii polucheny ocenka massy belogo karlika (MWD=1.05Mo) i massy obolochki akkrecirovannogo veshestva (Menv=0.4x10-4 Mo). miniobzor astro-ph/0410317 Diagnostika diskov vokrug goryachih zvezd (Diagnostics of Disks Around Hot Stars) Authors: David H. Cohen et al. Comments: 14 pages with 8 figures. V stat'e obsuzhdayutsya tri sposoba obnaruzheniya diskov vokrug goryachih zvezd: po profilyam spektral'nyh linii; po polyarizacii otrazhennogo ot diska izlucheniya; i rentgenovskaya diagnostika, esli zvezda yavlyaetsya magnitnoi. astro-ph/0410319 Opticheskaya tolsha po mikrolinzirovaniyu v napravlenii na baldzh Galaktiki po dannym MACHO (Microlensing Optical Depth towards the Galactic Bulge Using Clump Giants from the MACHO Survey) Authors: P. Popowski et al. (The MACHO Collaboration) Comments: 40 pages, 16 figures, 12 tables 7 let nablyudenii baldzha nashei Galaktiki prinesli 62 sobytiya gravitacionnogo mikrolinzirovaniya. Na osnove 42 sobytii, skoncentrirovannyh v oblasti ploshad'yu 4.5 kv.gradusa udalos' opredelit' tolshu dlya dannyh sobytii v napravlenii na centr etoi ploshadki: τ = 2.17 (+0.47/-0.38) x 10-6 dlya (l,b) = (1.50o,-2.68o), Eta cifra v neskol'ko raz men'she, chem poluchavshiesya ranee, no ochen' horosho sovpadaet so starymi teoreticheskim ocenkami. Krome samoi opticheskoi tolshi nablyudatelyam udalos' opredelit' i ee gradient, kotoryi sostavlyaet (1.06+/-0.71) x 10-6 grad-1 po galakticheskoi dolgote (b) (0.29+/-0.43) x 10-6 grad-1 po galakticheskoi shirote (l) Chitaite takzhe obzor individual'nyh sobytii mikrolinzirovaniya astro-ph/0410341. astro-ph/0410331 Vozdeistvie massivnyh zvezd na nachal'nuyu funkciyu mass (Massive Star Feedback on the IMF) Authors: M. Robberto et al. Comments: 3 pages Avtory sdelali ochen' interesnoe nablyudenie. Oni zametili, chto temp akkrecii na formiruyushiesya zvezdy v skoplenii Trapeciya (v Orione) v srednem men'she, chem v associacii Telec-Voznichii. Interpretiruyut oni eto tak. Vozdeistvie izlucheniya uzhe sformirovavshihsya massivnyh zvezd privodit k umen'sheniyu akkrecii, naprimer, iz-za ispareniya diskov. T.o. v bogatyh skopleniyah dolya malomassivnyh zvezd i buryh (korichnevyh) karlikov mozhet byt' men'she. katalog astro-ph/0410341 Mikrolinzirovanie v galakticheskom baldzhe po dannym MACHO (Galactic Bulge Microlensing Events from the MACHO Collaboration) Authors: C.L. Thomas el a. Comments: 34 pages, 9 figures V rabote predstavleny dannye o 450 sobytiyah gravitacionnogo mikrolinzirovaniya s vysokim otnosheniem signal/shum, zafiksirovannyh v napravlenii na baldzh Galaktiki, v hode eksperimenta MACHO s 1993 po 1999 gg. Ocenka opticheskoi tolshi otnositel'no mikrolinzirovaniya v ukazannom napravlenii poluchena v stat'e astro-ph/0410319. Obnaruzheno neskol'ko sobytii, istochniki kotoryh prinadlezhat karlikovoi galaktike Sagittarius (sputniku Mlechnogo Puti). V stat'e privedeny, v kachestve primerov, 3 krivyh bleska linziruemyh zvezd. Vse krivye bleska (ih 564) dostupny po adresu http://wwwmacho.mcmaster.ca. astro-ph/0410343 Poslesvechenie ot sliyaniya massivnyh chernyh dyr (The Afterglow of Massive Black Hole Coalescence) Authors: Milos Milosavljevic, E. S. Phinney Comments: 4 pages, 2 figures Sliyaniya dvoinyh (sverh)massivnyh chernyh dyr s massami 105-107 Mo budut s legkost'yu registrirovat'sya kosmicheskim lazernym interferometrom LISA (Laser Interferometer Space Antenna) dazhe s krasnyh smeshenii z=20. Odnako dannoe gravitacionnoe sobytie ne proidet nezamechennym i v drugih diapazonah: ono budet soprovozhdat'sya elektromagnitnym "poslesvecheniem", voznikayushim po sleduyushei prichine: Zadolgo do sliyaniya chernye dyry nachinayut "sgrebat'" okruzhayushii ih gaz, kotoryi v vyazkoi shkale vremeni formiruet disk vokrug (snaruzhi ot) dvoinoi sistemy (circumbinry disc). Vnutrennyaya granica diska primerno sovpadaet s tochkoi, gde prilivnye sily ot dvoinoi sistemy sravnivayutsya s deistvuyushimi v diske vyazkimi silami. Vnachale vnutrennii krai diska sleduet za chernymi dyrami po mere ih sblizheniya, no na poslednem etape skorost' sblizheniya komponent sistemy rezko vozrastaet i disk ot etogo processa "otstaet". Posle sliyaniya obrazuetsya odinochnaya chernaya dyra, okruzhennaya diskom. Cherez nekotoroe vremya pod deistviem vyazkih sil vnutrennii krai diska priblizhaetsya k chernoi dyre i v sisteme voznikaet rentgenovskii istochnik so svetimost'yu do 1044 erg/s i vremenem zhizni poryadka desyati let (dlya massy chernoi dyry 106 mass solnca). Eto i est' "poslesvechenie" slivshihsya chernyh dyr. astro-ph/0410345 Gamma-vspleski i plavlenie veshestva pod deistviem rentgenovskogo izlucheniya kak vozmozhnyi istochnik hondr i planet (Gamma-ray bursts and X-ray melting of material as a potential source of chondrules and planets) Authors: P. Duggan et al. Comments: 8 pages, 10 figures. Proceedings of the 5th INTEGRAL Workshop, Munich 16-20 February 2004. High resolution figures available at http://bermuda.ucd.ie/%7Esmcbreen/papers/duggan_01.pdf Avtory uvyazyvayut vmeste rezul'taty laboratornyh eksperimentov, gamma-vspleski i problemy proishozhdeniya planet i malyh tel v planetnyh sistemah. Eksperimenty s puchkami zhestkogo izlucheniya (ustanovka ESRF - European Synchrotron Radiation Facility) pokazali interesnye rezul'taty. Pri bystrom nagreve i posleduyushem ohlazhdenii obrazca voznikali struktury tipa hondr (chondrules). Avtory polagayut, chto podobnyi potok zhestkogo izlucheniya mozhet sozdavat'sya gamma-vspleskom na rasstoyanii do 300 svetovyh let. Oni polagayut, chto gamma-vspleski mogut byt' sushestvennym faktorom v formirovanii planetnyh sistem. My budem starat'sya hotya by perechislit' interesnye (dlya shirokoi publiki) stat'i, poyavivshiesya v razdele physics (vklyuchaya cross-listing). proceedings 12th International Congress on Plasma Physics V razdele Physics budut vylozheny materialy 12-go Mezhdunarodnogo kongressa po fizike plazmy. physics/0410074 Atomnye chasy i ogranicheniya na izmenenie fundamental'nyh konstant (Atomic Clocks and Constraints on Variations of Fundamental Constants) Authors: Savely G. Karshenboim, Victor Flambaum, Ekkehard Peik Comments: 8 pages V stat'e podrobno opisany laboratornye eksperimenty po obnaruzheniyu izmenenii fundamental'nyh konstant. Rasskazyvaetsya o sovremennyh atomnyh chasah, o tom, kak ih mozhno ispol'zovat' dlya testirovaniya konstant, i o tom, kakie predely polucheny. Vernut'sya k nachalu stranicy

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