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Soderzhanie i bystryi perehod k razdelam obzora
XMM-Newton obnaruzhil 2.6-sekundnye pul'sacii v istochnike myagkih povtoryayushihsya gamma-vspleskov SGR 1627-41 Sed'moi reliz Sloanovskogo cifrovogo obzora neba OGLE-TR-L9: Vnesolnechnaya tranzitnaya planeta okolo bystrovrashayusheisya zvezdy klassa F3 Naibolee polnyi spektroskopicheskii obzor v pole GOODS-N
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
odnim failom
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 N201
astro-ph za 01 - 16 dekabrya 2008 goda: izbrannye stat'i
Referaty otdel'nyh statei
Authors: P. Esposito et al. Comments: 4 pages, accepted for publiaction in ApJ Letters SGR 1627-41 byl edinstvennym istochnikom etogo tipa, dlya kotorogo ne bylo supernadezhnyh izmerenii perioda. Okolo 10 let nazad byla publikaciya, v kotoroi govorilos' o vozmozhnom periode okolo 6.4 sekund, no podtverzhdenii ne bylo. V etoi stat'e avtory pishut o nadezhnom obnaruzhenii pul'sacii s periodom 2.6 sekundy. Nablyudeniya provodilis' na sputnike XMM-Newton posle togo, kak istochnik opyat' voshel v polosu aktivnosti v mae 2008 goda. Poisk pul'sacii v arhivnyh dannyh ne dal rezul'tata.
Authors: John Bally Comments: 26 pages, to be published in the Handbook of star formation regions, Vol. 1 Astronomical society of the Pacific, 2008, Ed. Bo Reiputh Vyhodit zamechatel'nyi sbornik statei, v kotorom opisyvayutsya razlichnye oblasti zvezdoobrazovaniya. Prakticheski vse stat'i iz sbornika dostupny v Arhive. Ocherednaya poyavivshayasya stat'ya posvyashena blizhaishei oblasti zvezdoobrazovaniya v Orione, v kotoroi i seichas obrazuyutsya massivnye i malomassivnye zvezdy. Krome opisaniya sobstvenno kompleksa zvezdoobrazovaniya v Orione avtor dostatochno detal'no opisyvaet odin iz scenariev formirovaniya poyasa Gulda, i voobshe kartinu nedavnego zvezdoobrazovaniya v solnechnoi okrestnosti. Ochen' interesno i poznavatel'no.
Authors: Detlev Koester Comments: 11 pages, to appear in Mem. S.A.I. Avtor dostatochno podrobno rasskazyvaet o svoem kode dlya rascheta spektrov belyh karlikov, soprovozhdaya vse ssylkami na eshe bolee detal'noe izlozhenie. Kodu mnogo let, na protyazhenii kotoryh on nepreryvno modificirovalsya. Dumayu, chto seichas est' eshe bolee kachestvennye modeli (naprimer, u Suleimanova), no etot tekst polezen imenno kak sposob razobrat'sya v tom, chto i kak schitayut, a dal'neishie detali mozhno naiti po ssylkam. Sm. takzhe rabotu arxiv:0812.0491, v kotoroi obsuzhdayutsya effekty, vliyayushie na opredelenie mass belyh karlikov pri nizkoi temperature.
Authors: Dieter Breitschwerdt et al. Comments: 8 pages, to appear in the proceedings of @The Local Bubble and Beyond. II" Avtory opisyvayut (ves'ma kratko, eto zhe materialy konferencii) svoyu novuyu chislennuyu model' formirovaniya i evolyucii Mestnogo Puzyrya, osnovannuyu na novyh nablyudatel'nyh dannyh. Puzyr' nachal formirovat'sya pochti 15 millionov let nazad. V etom "prinimali uchastie" 19 sverhnovyh, poslednyaya iz kotoryh rvanula primerno polmilliona let nazad. Eto byli zvezdy iz podgruppy B1 Pleyad. V budushem Puzyr' budet pogloshen obrazovaniem Loop I, kotoroe bylo porozhdeno 39 sverhnovymi (razumeetsya, chislo vzryvov - eto model'nyi parametr i tam est' nekotoraya neopredelennost'), svyazannymi s associaciei Skorpion-Centavr.
arxiv:0812.0558
Soderzhanie himicheskih elementov v Galakticheskom baldzhe: rezul'taty izucheniya
planetarnyh tumannostei i zvezd-gigantov (Abundances in the Galactic bulge:
results from planetary nebulae and giant stars).
Authors: Chiappini C. et al. Comments: A&A, 39 pages Ponimanie himicheskoi evolyucii Galakticheskogo baldzha trebuet analiza nablyudaemyh obilii himicheskih elementov (kislorod, neon, argon, sera) v planetarnyh tumannostyah i zvezdah-gigantah, prinadlezhashih etoi podsisteme Galaktiki. Analiz bol'shogo nablyudatel'nogo materiala pozvolil avtoram raboty sdelat' vyvod o tom, chto obiliya kisloroda i neona, nablyudaemye v planetarnyh tumannostyah, naibolee blizki k himicheskomu soderzhaniyu etih elementov v mezhzvezdnoi srede na moment formirovaniya tumannostei i, takim obrazom, mogut byt' ispol'zovany kak nablyudatel'nye ogranicheniya modelei himicheskoi evolyucii baldzha. Analogichnyi vyvod sdelan dlya sery i argona, elementov, soderzhanie kotoryh pochti ne izmenyaetsya v processe evolyucii planetarnyh tumannostei. Vyyavleno sushestvennoe rashozhdenie mezhdu soderzhaniem vyshe nazvannyh elementov v planetarnyh tumannostyah i zvezdah-gigantah.
arxiv:0812.0592
Evolyuciya Laiman-al'fa galaktik: zvezdnye naseleniya na z = 0.3
(Evolution of Ly-alpha Galaxies: Stellar Populations at z = 0.3).
Authors: Steven L. Finkelstein et al. Comments: ApJ, 16 pages, submitted Nablyudeniya galaktik s emissiei v linii Laiman-al'fa (Lyman alpha emitting galaxies - LAEs) na malyh krasnyh smesheniyah stali vozmozhny otnositel'no nedavno s pomosh'yu ul'trafioletovogo kosmicheskogo teleskopa GALEX. Dannye GALEX dlya 96 blizkih galaktik s emissiei v linii Laiman-al'fa, nahodyashihsya na krasnyh smesheniyah 0.2 < z < 0.35, vpervye opublikovali Deharveng i dr. (2008). Avtory dannoi raboty otobrali iz nazvannogo spiska 30 galaktik i s pomosh'yu koda zvezdnogo populyacionnogo sinteza Bruzual & Charlot (2003) popytalis' promodelirovat' sushestvuyushie nablyudatel'nye dannye. Raschitannaya avtorami stat'i setka modelei pozvolila dat' ogranicheniya na vozrast i massu zvezdnyh naselenii blizkih Laiman-al'fa galaktik.
Authors: I.A.G. Snellen et al. Comments: 7 pages, to appear in A&A Podtverzhdeno obnaruzhenie tranzitnoi planety v ramkah proekta OGLE. Sama planeta dostatochno zauryadna (goryachii yupiter), no ona obnaruzhena vokrug dostatochno bystrovrashayusheisya zvezdy. Napomnyu, chto schitaetsya, chto zvezdy s planetnymi sistemami dolzhny vrashat'sya medlenno (v solnechnoi sisteme pochti ves' moment "sidit" v planetah). Krome togo, eto samaya goryachaya (na segodnyashnii den') zvezda s planetoi. Sm. takzhe press-reliz.
Authors: K. Abazajian et al., for the SDSS Comments: 20 pages, submitted to ApJS Vyshel sed'moi (poslednii) reliz SDSS. V nem est' ~1.6 milliona spektrov (v osnovnom eto galaktiki). Uluchsheny astrometricheskie dannye dlya oblasti vblizi ploskosti Galaktiki.
Authors: John Kormendy Comments: 8 pages Eto kratkoe izlozhenie rezul'tatov avtora, opublikovannyh v ApJS (arxiv:0810.1681). Sut' sostoit v tom, chto na t.n fundamental'noi ploskosti sferoidal'nye galakktiki raspolozheny sovsem ne tak, kak ellipticheskie galaktiki i baldzhi. T.e., sferoidal'nye galaktiki - eto ne karlikovye ellipticheskie. Eto drugoi klass. Sootvetstvenno, u nih byli raznye istorii formirovaniya.
Authors: V.N. Lebedenko et al. Comments: 12 pages Samyi novyi iz sushestvuyushih eksperimentov po laboratornomu poisku temnogo veshestva opublikoval pervye verhnie predely. Britanskii eksperiment ZEPLIN-III idet v podzemnoi laboratorii Bulbi (Boulby) na glubine 1100 metrov. Rabochim telom yavlyaetsya zhidkii ksenon (12 kilogramm). Razumeetsya, predely budut uluchshat'sya. I, kto znaet, mozhet byt' chto-to i uvidyat.
arxiv:0812.1225
Vliyanie TP-AGB zvezd na modeli ierarhicheskogo formirovaniya galaktik
(The impact of TP-AGB stars on hierarchical galaxy formation models).
Authors: Chiara Tonini et al. Comments: MNRAS, 5 pages, submitted Izluchenie zvezd promezhutochnyh mass na stadii TP-AGB (Thermally-Pulsing Asymptotic Giant Branch phase) dominiruet v blizkom infrakrasnom diapazone na dlinah voln bolee 5000 A, i uchet ego vazhen dlya korrektnogo modelirovaniya evolyucii galatik. Avtory raboty proveli chislennoe sravnenie modeli, yavno uchityvayushei etot effekt (sm. Maraston 2005), s populyarnymi kodami populyacionnogo sinteza PEGASE i Bruzual & Charlot. Pokazano, chto uchet TP-AGB zvezd v model'nyh spektrah sushestvenno izmenyaet poluchaemoe dlya galaktik sootnoshenie cvet-zvezdnaya velichina, a tak zhe ego evolyuciyu s krasnym smesheniem. Dlya togo, chtoby vosproizvesti nablyudaemuyu svetimost' galaktik v fil'tre K bez ucheta izlucheniya TP-AGB zvezd trebuyutsya gorazdo bol'shie zvezdnye massy i, sledovatel'no, bolee intensivnyi temp zvezdoobrazovaniya na bol'shih krasnyh smesheniyah.
arxiv:0812.1227
Nablyudaemye proyavleniya elementov r-processa v naibolee staryh zvezdah Galaktiki
(Observing the Signatures of the r-Process in the Oldest Galactic Stars).
Authors: Anna Frebel Comments: 10 pages, to appear in the Proceedings of the "10th Symposium on Nuclei in the Cosmos (NIC X)" Naibolee malometallichnye zvezdy Galaktiki odnovremenno yavlyayutsya samymi starymi v nei, poskol'ku byli sformirovany na samyh rannih etapah evolyucii Galaktiki iz gaza, eshe ne obogashennogo metallami. Na primere ekstremal'no malometallichnoi zvezdy HE 1523-0901, vozrast kotoroi ocenivaetsya v 13 mlrd let, avtorom raboty dan analiz nablyudaemyh soderzhanii tyazhelyh elementov Eu, Os, and Ir i radioaktivnyh Th i U.
Authors: Cameron D. Patterson et al. Comments: 18 pages Opisyvaetsya skromnyi radioteleskop ETA, rabotayushii na volne okolo 8 metrov (24-47 Mgc). On sostoit iz 12 dipolei i prednaznachen dlya obzora neba na nizkom urovne chuvstvitel'nosti s cel'yu poiska tranzientov (naprimer, izlucheniya ot gamma-vspleskov i tp.). Raspolozhen instrument v Severnoi Karoline.
obzor
arxiv:0812.1448
Proishozhdenie i priroda pyli v rannei vselennoi
(Origin and Nature of Dust in the Early Universe).
Authors: Takaya Nozawa et al. Comments: 19 pages, 7 figures and 1 table. Submitted to the ASP conference proceedings of "Cosmic Dust - Near and Far" Avtorami obzora prosummirovany poslednie dostizheniya v teoreticheskom izuchenii processov formirovaniya i evolyucii pyli v pervyh sverhnovyh, rassmatrivaemyh kak naibolee veroyatnyh istochnikah pyli v rannei vselennoi. Rassmotreny rezul'taty raschetov formirovaniya pyli v sverhnovyh zvezdah Pop III i evolyucii pyli v ostatkah sverhnovyh. Proanalizirovano, pochemu na bol'shih krasnyh smesheniyah mezhzvezdnyi gaz harakterizuetsya ploskoi krivoi ekstinkcii.
arxiv:0812.1578
Soderzhanie zheleza v planetarnyh tumannostyah Galaktiki
(The Iron Abundance in Galactic Planetary Nebulae).
Authors: G. Delgado-Inglada et al. Comments: ApJ, 15 pages Avtorami izucheno soderzhanie zheleza v 33 planetarnyh tumannostyah Galaktiki. Eto naibolee polnoe issledovanie na etu temu, poskol'ku ostaetsya nemalo voprosov o tom, skol'ko pyli soderzhitsya v etih ob'ektah. Analiz nablyudatel'nyh dannyh, provedennyi v rabote, pokazal, chto do 90 procentov atomov zheleza v planetarnyh tumannostyah kondensiruetsya v pyl'.
Authors: G. Giacomelli for the ANTARES collaboration Comments: 8 pages, invited talk at "New Trends in high-energy physicsa & safe nuclear energy" Podvodnyi neitrinnyi detektor ANTARES rabotaet u beregov Francii. Seichas montazh uzhe zakonchen. Detektor v itoge poluchilsya ne ochen' bol'shoi. Napomnyu, chto est' i drugie evropeiskie proekty (NESTOR, NEMO). V itoge sovmestnymi usiliyami evropeicy dolzhny postroit' detektor s effektivnym ob'emom poryadka kubicheskogo kilometra. No eto v budushem. Poka zhe - chto est'. Zametka, na moi vzglyad, polezna neplohim vvedeniem. Sm. takzhe arxiv:0812.20954, gde rech' idet o pervyh rezul'tatah ANTARES.
Authors: Asimina Arvanitaki et al. Comments: 81 pages, 23 figures, 7 tables Bol'shoi obzor, posvyashennyi tomu, kak astrofizicheskie nablyudeniya mogut proveryat' modeli velikogo ob'edineniya. Osnovnoe vnimanie udeleno raspadam chastic temnogo veshestva. Raspady mogut proyavlyat'sya kak v razlichnyh vidah izlucheniya (gamma-, potoki chastic kosmichskih luchei, neitrino), tak i po svoemu vozdeistviyu na soderzhanie elementov (v pervuyu ochered', rech' idet o litii). Takzhe avtory kratko obsuzhdayut, kak so vsem etim mogut byt' svyazany budushie rezul'taty s LHC.
Authors: E. Oliva Comments: 6 pages TNG - eto ital'yanskii teleskop s 3.5-metrovym zerkalom, ustanovlennyi na ispanskom ostrove La Pal'ma. V stat'e daetsya kratkaya svodka parametrov instrumentov, principov raspredeleniya vremeni i tp. Zatem privoditsya statistika po stat'yam, rezul'taty kotoryh osnovany na dannyh s etogo teleskopa, a takzhe po citiruemosti etih statei.
arxiv:0812.2354
Chego ozhidat' ot Gaia i kak eto povliyaet na vozrasta zvezd(The promise of Gaia
and how it will influence stellar ages).
Authors: Carla Cacciari Comments: 10 pages, 2 figures, IAU Symp. 258 on "The Ages of Stars" Evropeiskii kosmicheskii proekt Gaia, zaplanirovannyi k zapusku v 2011 godu, pozvolit poluchit' astrometricheskie, fotometricheskie i spektroskopicheskie dannye dlya bolee chem milliarda zvezd yarche 20-i zvezdnoi velichiny. V stat'e dano opisanie instrumenta, privodyatsya ego osnovnye harakteristiki i obsuzhdayutsya nauchnye napravleniya, v kotoryh Gaia pozvolit dostich' revolyucionnyh izmenenii.
arxiv:0812.2476
Millimetrovyi obzor yarkih infrakrasnyh galaktik so vspyshkami zvezdoobrazovaniya na z = 2
(A Millimetre Survey of Starburst Dominated Ultraluminous Infrared Galaxies at z = 2).
Authors: J.D. Younger et al. Comments: MNRAS, 11 pages, 10 figures V rabote predstavleny nablyudeniya 12 ochen' yarkih infrakrasnyh galaktik (ultraluminous infrared galaxies - ULIRGs), nahodyashihsya na krasnyh smesheniyah blizkih k z = 2. Nablyudeniya byli provedeny s pomosh'yu 30-m radioteleskopa IRAM v millimetrovom diapazone. Poluchennye dannye, dopolnennye nablyudeniyami na dlinah voln 70 i 160 mikron, pozvolili postroit' spektral'nye energeticheskie raspredeleniya galaktik v dalekom infrakrasnom diapazone i, tem samym, dat' bolee tochnye ogranicheniya na svetimost' galaktik, massu nahodyasheisya v nih pyli i ee temperaturu. Avtory osobo otmechayut effektivnost' predlozhennogo imi selekcionnogo metoda dlya poiska i otbora galaktik takogo klassa.
arxiv:0812.2481
Naibolee polnyi spektroskopicheskii obzor v pole GOODS-N (A Highly Complete Spectroscopic survey of the GOODS-N Field ).
Authors: A. J. Barger et al. Comments: ApJ, 24 pages Pole GOODS-N (the Great Observatories Origins Deep Survey-North) yavlyaetsya odnoi iz naibolee intensivno izuchaemyh ploshadok na nebesnoi sfere. V dannoi rabote predstavlen naibolee polnyi spektroskopicheskii obzor krasnyh smeshenii 2907 galaktik i zvezd, nablyudaemyh v pole GOODS-N. Ogranicheniya po zvezdnym velichinam sostavili 24.5 zvezdnoi velichiny v fil'tre F435WAB i 23.3 zvezdnoi velichiny v fil'tre F850LPAB. Rezul'taty summirovany v vide tablic. Ohvachen spektral'nyi diapazon ot blizkogo ul'trafioletovogo do srednego infrakrasnogo diapazona. Analiz nablyudatel'nyh dannyh, predstavlennyh v dannom kataloge, gotovitsya avtorami k publikacii v sleduyushei rabote.
Authors: M. Mugrauer, R. Neuhauser Comments: 7 pages, A&A in press Obnaruzheny dva malomassivnyh (0.18 i 0.35 mass Solnca) sputnika u dvuh zvezd s ekzoplanetami. Odin iz nih (bolee massivnyi) nahoditsya vsego lish' v 230 a.e. ot vtoroi zvezdy. V principe, osoboi novizny tut net. Eto uzhe 42-ya i 43-ya dvoinaya sistema s ekzoplanetami. No polezno znat', chto dazhe bez ucheta effektov selekcii okolo 17% ekzoplanetnyh sistem nahodyatsya v dvoinyh i kratnyh sistemah.
Authors: T. Padmanbhan Comments: 25 pages, Les Houches summer school Poleznyi obzor-lekciya po metodam statisticheskogo opisaniya sistem tipa skopleiya chastic, svyazannyh vzaimnym tyagoteniem. Privodyatsya formuly i dlya sluchaya rasshiryayushegosya prostranstva.
arxiv:0812.2626
Galaktiki s aktivnym zvezdoobrazovaniem v Sloanovskom obzore: dokazatel'stvo evolyucii metallichnosti
(Star-forming galaxies in SDSS: signs of metallicity evolution).
Authors: M.A. Lara-Lopez et al. Comments: A&A, 4 pages, 3 figures Ispol'zuya dannye pyatogo reliza Sloanovskogo obzora (Sloan Digital Sky Survey–Data Release 5), avtory otobrali 207 spiral'nyh galaktik na krasnyh smesheniyah 0.1 < z < 0.4 dlya issledovaniya voprosa o tom, kak menyalas' metallichnost' gaza v galaktikah blizkoi svetimosti v zavisimosti ot ih krasnogo smesheniya. Poluchennye dannye govoryat o neposredstvennoi evolyucii metallichnosti v spiral'nyh galaktikah. V chastnosti, na intervale krasnyh smeshenii 0.3 < z < 0.4 dekrement soderzhaniya kisloroda 12+log(O/H) sostavil 0.1 dex. Rezul'tat osobenno interesen tem, chto poluchen dlya galaktik na malyh krasnyh smesheniyah.
arxiv:0812.2814
Izbytochnaya plotnost' galaktik na z = 3.7 v pole CDF-S (Overdensities of galaxies at z ~ 3.7 in CDF-S).
Authors: Eugene Kang & Myungshin Im Comments: ApJ Letters, 5 pages, 3 figures Dannye nablyudenii Yuzhnogo Glubokogo Polya Chandra (the Chandra Deep Field South - CDF-S) nahodyatsya v otkrytom dostupe, poetomu izucheniyu etoi ploshadki posvyasheno mnogo rabot. Avtory publikacii soobshayut ob otkrytii imi izbytochnoi plotnosti galaktik na krasnom smeshenii z = 3.7. Predpolozhitel'no, eto protoskoplenie, soderzhashee bolee 15 massivnyh galaktik. Oblast' izbytochnoi plotnosti galaktik byla obnaruzhena s pomosh'yu metoda fotometricheskih krasnyh smeshenii na osnove otbora galaktik-kandidatov na 3.45 < z < 3.85.
arxiv:0812.2856
Metally na bol'shih krasnyh smesheniyah: umen'shenie soderzhaniya CIV na z > 5.3 (High Redshift Metals I.: The decline of CIV at z > 5.3).
Authors: George D. Becker et al. Comments: 11 pages, 8 figures, submitted to ApJ Poisk absorbcionnyh linii ugleroda C IV v spektrah chetyreh naibolee udalennyh kvazarov na z = 6, provedennyi s pomosh'yu teleskopa Keck/NIRSPEC v eshelle-mode, ne uvenchalsya uspehom. Nulevoi rezul'tat mozhet byt' sledstviem krupno-masshtabnyh variacii v obogashenii mezhgalakticheskoi sredy na krasnyh smesheniyah 5.3 < z < 6. i potomu nuzhdaetsya v dopolnitel'noi proverke, trebuyutsya dal'neishie nablyudeniya C IV v napravlenii drugih ochen' udalennyh kvazarov. Tem ne menee, poluchennyi rezul'tat pozvolyaet nalozhit' ogranicheniya na naklon i normirovku luchevoi koncentracii trehkratno ionizovannogo ugleroda v intervale 13.0 < log N(C IV) < 15.0 i potomu imeet vazhnye kosmologicheskie prilozheniya.
My budem starat'sya hotya by perechislit' interesnye (dlya shirokoi publiki) stat'i, poyavivshiesya v razdele physics (vklyuchaya cross-listing).
Authors: C. Regenfus Comments: 4 pages, proceedings of the 4th Patras workshop (DESY) ArDM - eto novyi detektor chastic temnogo veshestva, ustanavlivaemyi v CERNe. Rabochim telom budet tonna zhidkogo argona.
Authors: William G. Hoover Comments: 20 pages Avtoru stat'i seichas 72 goda, a potomu on vpolne mozhet obozrevat' promezhutki vremeni poryadka poluveka. V osnovnom raboty avtora kasalis' modelirovaniya molekulyarnoi dinamiki, o chem on i vspominaet. Voobshe, interesno pochitat' biografiyu uchenogo .... Kstati, na stranice avtora v otskanirovannom vide est' neskol'ko poleznyh knig po chislennomu modelirovaniyu.
Authors: S.T. Dye Comments: 3 pages Koroten'kii obzor po geoneitrino. Eto elektronnye neitrino, rozhdayushiesya v beta-raspade. Oni izluchayutsya radioaktivnymi elementami v nedrah Zemli. V nastoyashee vremya dva detektora (KamLAND v Yaponii i Borexino Italii) registriruyut neitrino ot rasprada toriya i urana. Planiruyutsya novye proekty. Vse eto ochen' vazhno dlya geofizicheskih issledovanii. Vvidu kratkosti i ponyatnosti - sovetuyu vsem prochest'.
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