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Razmer akkrecionnogo diska kvazara - otnoshenie k masse chernoi dyry Katalog malomassivnyh rentgenovskih dvoinyh v Galaktike i Magellanovyh oblakah (chetvertoe izdanie) Katalog massivnyh rentgenovskih dvoinyh v Galaktike (chetvertoe izdanie) Spektr kosmicheskih luchei sverhvysokih energii po dannym observatorii imeni P'era Ozhe i ego astrofizicheskie prilozheniya
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Polnyi Arhiv predydushih vypuskov. Arhiv statei, voshedshih v vypuski s 01 iyulya 2002 g. po 31 marta 2003 g.
Arhiv na 14.04.2006
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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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astro-ph za 01 - 19 iyulya 2007 goda: izbrannye stat'i
Referaty otdel'nyh statei
Authors: Robert Wagner (for the MAGIC Collaboration) Comments: 7 pages, 8 figures, to appear in the proceedings of Extragalactic Jets: Theory and Observation from Radio to Gamma Ray, Girdwood (AK), May 2007 Daetsya obzor dannyh po nablyudeniyam aktivnyh yader galaktik razlichnyh tipov na nazemnom gamma-teleskope MAGIC v diapazone energii poryadka neskol'kih TeV i nizhe. O novom otkrytii - obnaruzhenii zhestkogo gamma izlucheniya ot lacertidy 1ES1011+496 na z=0.212 - sm. arxiv:0706.4435. Takzhe sm. arxiv:0706.4442, arxiv:0706.4453.
Authors: J. P. Zibin, A. Moss, D. Scott Comments: 23 pages, 12 figures Avtory izuchayut budushuyu evolyuciyu reliktovogo fona. Zadacha, na moi vzglyad, chisto akademicheskaya (kakaya nam raznica, kakie karty smogut stroit' v dalekom budushem), no zato opisyvaetsya mnogo interesnoi fiziki.
Authors: Shawn Poindexter, et al. Comments: 5 pages, 4 figures, submitted to ApJ Po dannym o mikrolinzirovanii na volnah ot 0.4 do 8 mikron udalos' opredelit' razmer diska kvazara HE1104-1805 na raznyh dlinah voln (sm. takzhe sleduyushuyu stat'yu).
Authors: Christopher W. Morgan et al. Comments: 5 pages, 3 figures, submitted to ApJL Sovershenno porazitel'noe, s moei tochki zreniya, delo! Udaetsya proshupyvat' (v optike!) akkrecionnye diski kvazarov. Rech' idet o nablyudenie struktur razmerom menee 1016 santimetrov s rasstoyanii bolee 1026 santimetrov. Udaetsya eto blagodarya mikrolinzirovaniyu. My privykli k tomu, chto mikrolinzirovanie nablyudaetsya u nas v Galaktike ili v ee blizhaishih sputnikah. No, okazyvaetsya, ono mozhet srabotat' i v drugih situaciyah. Nablyudayutsya kvazary, linziruemye galaktikami. Eto sil'noe linzirovanie. No v galaktikah est' zvezdy. I imenno oni mogut davat' effekt mikrolinzirovaniya, pozvolyayushii proshupat' disk kvazara! Bolee togo, udaetsya pokazat', chto razmer diska kvazara svyazan s massoi chernoi dyry.
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Authors: G. Lo Curto, R.P. Mignani, R. Perna, G.L. Israel Comments: 6 pages, 2 figures, accepted by A&A on 26-06-2007 Predstavleny rezul'taty glubokih nablyudenii pyati ob'ektov Velikolepnoi semerki v Ik diapazone na VLT. Polucheny tol'ko verhnie predely (primerno 22 velichina v fil'tre H). Po mneniyu avtorov, predely poka nedostatochno gluboki, chtoby sovsem zakryt' model', v kotoroi zametnuyu rol' igrayut ostatochnye diski vokrug neitronnyh zvezd.
Authors: Q.Z. Liu, J. van Paradijs, E.P.J. van den Heuvel Comments: 45 pages, catalogue included A&A published, 2007, A&A, 469, 807 Predstavlena novaya versiya kataloga malomassivnyh rentgenovskih dvoinyh. Vklyucheny ob'ekty nashei Galaktiki, a takzhe Magellanovyh oblakov. Vsego katalog vklyuchaet 187 istochnikov.
Authors: Q.Z. Liu, J. van Paradijs, E.P.J. van den Heuvel Comments: 25 pages, table included A&A published, 2006, A&A, 455, 1165 Novaya versiya kataloga massivnyh rentgenovskih dvoinyh. V nego popalo 114 sistem, prinadlezhashih nashei Galaktike.
Authors: N. Bartel, et al. Comments: 25 pages, 11 figures, accepted for publication in ApJ Dlya sverhnovoi 1993J v galaktike M81 udalos' poluchit' ochen' tochnye dannye po lineinym (t.e. v km/s) skorostyam razleta po opticheskim nablyudeniyam, i po uglovym skorostyam razleta po radiodannym. V itoge, mozhno geometricheskim metodom opredelit' rasstoyanie do etoi galaktiki. Ono okazyvaetsya ravnym 3.96+/-0.29 Mpk, chto sut' vyshe, chem opredelennoe ranee v ramkah HST Key project (3.63+/-0.34 Mpk).
Authors: Patricia A. Whitelock Comments: Paper given at the 2007 meeting of the National Society of Black Physicists; 10 pages, 2 photographs. To appear in American Institute of Physics Conference Proceedings Napomnyu, chto v Yuzhnoi Afrike stoit 10 metrovyi teleskop (postroennyi po sheme Hobbi-Eberli), a takzhe tam mozhet byt' razmeshena SKA. V obzore opisyvaetsya vse , svyazannoe s etimi proektami, a takzhe koe-chto drugoe i nekotorye plany astronomicheskogo soobshestva etoi strany. Po-moemu, interesno.
Authors: R. P. Mignani et al. Comments: 8 pages, 4 figures, A&Aaccepted Vela Dzhunior - eto ostatok sverhnovoi v sozvezdii Parusov (vela). "Dzhunior" - chtoby otlichat' ot davno izvestnogo pul'sara (i ostatka) v Vele. Rasstoyanie do ostatka okolo 1 kpk. V nem obnaruzhen central'nyi kompaktnyi rentgenovskii istochnik (CCO). Avtory proveli glubokie nablyudeniya v optike i blizhnem IK na VLT. V optike ob'ekt ne byl obnaruzhen, zato v IK udalos' chto-to rassmotret'. Esli eto ob'ekt, svyazannyi s rentgenovskim istochnikom (a eto poka ne dokazano), to eto mozhet byt' ostatochnyi disk vokrug neitronnoi zvezdy ili zhe sama zvezda. V poslednem sluchae est' mnogo voprosov....
Authors: J. M. Kovac, D. Barkats Comments: 8 pages, 23 figure panels and photos, invited review for the Proceedings of the 6th Rencontres du Vietnam 2006 Daetsya obzor proshlyh, nastoyashih i budushih eksperimentov po nablyudeniyu reliktovogo izlucheniya v Antarktide.
Authors: Hans Zinnecker, Harold W. Yorke Comments: 139 pages, 18 figures, 5 tables, glossary Gigantskii obzor po obrazovaniyu massivnyh zvezd. Vklyucheno ochen' mnogo materiala.
Authors: Eric Aubourg et al. Comments: Submitted to ApJ Letters Avtory pokazyvayut, analiziruya svoistva galaktik, v kotoryh nablyudalis' sverhnovye tipa Ia, chto est' subpopulyaciya vzryvov etogo tipa, u kotoryh praroditeli zhili vsego lish' okolo 70 millionov let (vmesto neskol'kih milliardov u osnovnoi massy praroditelei).
Authors: J.P. Halpern, F. Camilo, E.V. Gotthelf Comments: 4 pages, 1 figure, to appear in The Astrophysical Journal Geminga - izvestnaya neitronnaya zvezda, obnaruzhennaya pervonachal'no po ee gamma-izlucheniyu. Zatem bylo obnaruzheno rentgenovskoe izluchenie, a pozzhe i pul'sacii: kak v rentgene, tak i v radio. 3EG J1835+5918 - eto istochnik, pohozhii na Gemingu. Oboznachenie ukazyvaet, chto sperva s pomosh'yu pribora EGRET byl obnaruzhen gamma-istochnik. Pozzhe bylo obnaruzheno rentgenovskoe izluchenie. A vot pul'sacii vse net i net. Ne obnaruzheny pul'sacii i po novym dannym, hotya avtory ispol'zovali samuyu moshnuyu artilleriyu, radioteleskop v Grin Benk i rentgenovskuyu observatoriyu Chandra.
Authors: A. Ibragimov et al. Comments: 10 pages, 9 figures and 2 tables, accepted to MNRAS U izvestnogo kandidata v chernye dyry Cyg X-1 sushestvuet modulyaciya izlucheniya s periodom okolo 150 dnei. Eto mnogo bol'she orbital'nogo perioda. Blagodarya novym dannym avtory poluchili vozmozhnost' dostatochno podrobno issledovat' etu peremennost'. Veroyatnee vsego, my imeem delo s precessiei akkrecionnogo diska. Takoe yavlenie nablyudaetsya i u drugoi izvestnoi sistemy - SS 433. Voobshe, sistemy ochen' pohozhi! Tol'ko rezhimy akkrecii raznye.
Authors: L. Vetere, P. Soffitta, E. Massaro, P. Giommi, E. Costa Comments: 4 pages, 3 figures Daetsya kratkoe opisanie kataloga, kotoryi dostupen on-lain zdes'. V katalog voshlo 77 gamma-vspleskov, a takzhe rentgenovskie krivye bleska dlya 56 vspleskov.
Authors: N. Bucciantini et al. Comments: 5 pages, 3 figures, submitted to MNRAS letter, presented at the conference "Astrophysics of Compact Objects", 1-7 July, Huangshan, China Predstavleny rezul'taty chislennogo modelirovaniya. V rezul'tate kollapsa obrazuetsya sil'no zamagnichenaaya bystrovrashayushayasya neitronnaya zvezda - magnitar. Formiruyutsya dzhety. Parametry obrazovavshegosya ob'ekta pozvolyayut po mneniyu avtorov, govorit' o poyavlenii dlinnogo gamma-vspleska. Sm. takzhe arXiv:0707.2219 o svyazi sverhnovyh i gamma-vspleskov, a takzhe o vozmozhnosti togo, chto v serdce central'noi mashiny vspleska sidit neitronnaya zvezda, a ne chernaya dyra. I arXiv:0707.2187 o svyazi gamma-vspleskov so zvezdami maloi metallichnosti.
Authors: R. Hammer, P. Ulmschneider Comments: 35 pages, Lecture notes and review, held at Kodaikanal Winter School on Solar Physics, Dec 2006. This version contains corrected page numbers for some of the references V obzore rassmatrivaetsya fizika obrazovaniya linii v burlyashih verhnih sloyah Solnca.
Authors: Bruce G. Elmegreen Comments: 46 pages, 5 figures, scheduled for ApJ 668, October 20, 2007 Bol'shaya rabota, v kotoroi podrobno rassmatrivaetsya kollaps, privodyashii k poyavleniyu zvezd v gigantskih molekulyarnyh oblakah.
Authors: M. Gillon et al. Comments: 5 pages, 3 figures Po dannym, poluchennym s pomosh'yu kosmicheskoi infrakrasnoi observatorii Spitcer, udalos' dostatochno tochno opredelit' radius odnoi iz ekzoplanet, a zaodno i ee zvezdy. Planetnyi radius raven 4 - 4.4 radiusa Zemli. Radius zvezdy: 0.45 - 0.485 radiusa Solnca. Naklonenie orbity 85-86 gradusov. Edinstvennym predpolozhenie, sdelannym dlya polucheniya tochnyh chislennyh znachenii, byla massa zvezdy: 0.4-0.48 mass Solnca. Planeta otnositsya k klassu "goryachih neptunov", buduchi dostatochno pohozhei na Neptun i raspolagayas' poblizosti ot zvezdy. Sm. takzhe arxiv:0707.2778.
Authors: Jenny E. Greene, Luis C. Ho Comments: to appear in ApJ; 13 pages, 8 figures Pod "malomassivnymi" avtory ponimayut chernye dyry s massami menee 2 millionov mass Solnca (eto men'she massy chernoi dyry v centre nashei Galaktiki). Oni analiziruyut Sloanovskii cifrovoi obzor (SDSS) na predmet poiska takih ob'ektov. Konechno, opredelenie nalichiya chernoi dyry i ocenka ee massy delayut v ramkah nekotoryh model'nyh predpolozhenii. Vo-pervyh, avtory vydelyayut aktivnye galaktiki s shirokimi liniyami. Vo-vtoryh, oni pol'zuyutsya izvestnymi korrelyaciyami mezhdu parametrami nablyudaemyh aktivnyh yader, chtoby ocenit' massu dyr. V itoge polucheno 174 ob'ekta, kotorye mozhno schitat' (s nekotoroi dolei uverennosti) chernymi dyrami s massami menee 2 millionov solnechnyh (plyus est' eshe 55 kandidatov). Eto bol'shoi shag vpered. Do etogo bylo izvestno lish' okolo dvuh desyatkov chernyh dyr v takom diapazone mass. Issledovaniya "malomassivnyh sverhmassivnyh" chernyh dyr vazhny, t.k. dlya bol'shih mass ustanovleno neskol'ko vazhnyh korrelyacii (v pervuyu ochered' mezhdu massami chernyh dyr i razlichnymi parametrami baldzhei, t.e. sfericheskih sostavlyayushih galaktik). Eti korrelyacii ukazyvayut na obshnost' processa formirovaniya galaktiki i chernoi dyry v nei. Dlya malyh mass chernyh dyr (i baldzhei) vse ne tak ponyatno...
Authors: T.Yamamoto, for the Pierre Auger Collaboration Comments: 4 pages, Contribution to the 30th International Cosmic Ray Conference, Merida Mexico, July 2007 Ya starayus' v svoih obzorah sledit' za poyavleniem novyh dannyh s observatorii imeni P'era Ozhe. V etoi korotkoi zametke privodyatsya dannye po, veroyatno, samoi vazhnoi teme - spektru kosmicheskih luchei sverhvysokih energii. Na pervom risunke privedeno tri spektra. Observatoriya ispol'zuet dve metodiki dlya registracii kosmicheskih luchei. Chashe vsego srabatyvayut t.n. vodnye cherenkovskie detektory (SD - surface detectors). Ih polnoe chislo budet prevoshodit' poltory tysyachi! Krome etogo, stoyat 24 kompleksa zerkal, kotorye yasnymi bezlunnymi nochami mogut nablyudat' vspyshki, voznikayushie posle vleta chasticy v atmosferu. Posledstviya vhodya v atmosferu nekotoryh chastic udaetsya zasech' srazu dvumya metodami - togda imeem "gibridnoe detektirovanie". V etom sluchae mozhno tochnee vsego opredelit' energiyu chasticy. Pravda, takih sobytii poka ne slishkom mnogo. Tri spektra sootvestvuyut gibridnoi registracii (kruzhki), i registracii s pomosh'yu nazemnyh vodnyh detektorov. Avtory vydelili chasticy, kotorye leteli pod uglom bolee 30 gradusov k gorizontu (chernye treugol'niki) i menee 30 gradusov. Vidno, chto poka oshibki (svyazannye v osnovnom s chislom chastic) neveliki, vse tri spektra horosho sovpadayut drug s drugom. V oblasti samyh bol'shih energii poka chastic malo, tochki nachinayut "prygat'", vozrastayut oshibki (pokazany "usikami"). No vse ravno koe-chto mozhno skazat'. Dlya etogo vzglyanem na vtoroi risunok.
Na vtorom risunke pokazan summarnyi spektr (po dannym vseh detektorov) v sravnenii s neskol'kimi modelyami. Vo-pervyh, vazhnym rezul'tatom yavlyaetsya to, chto na vysokih energiyah spektr nel'zya opisat' odnim pokazatelem stepeni (na vysokih energiyah spektr kruche, hotya ego povedenie tam mozhet byt' i ne monotonnym). Posmotrim, chto pokazyvaet sravnenie s s modelyami. Krasnye krivye sootvestvuyut tomu, chto kosmicheskie luchi vysokih energii - eto tol'ko protony. Vidno, chto eta model' ne ochen' horosho opisyvaet dannye. Golubye krivye sootvetstvuyut smeshannomu sostavu kosmicheskih luchei (t.e. est' i drugie yadra). Zdes' sovpadenie luchshe, no vse ravno vidno, chto prostye modeli ne mogut polnost'yu opisat' spektr.
Po suti tol'ko v etom godu observatoriya Ozhe vyhodit na polnuyu moshnost'. Tak chto dannyh budet bol'she. Budem zhdat'.
Obsudit' v ZhZh-soobshestve
ru_astroph.
Authors: A. Reiners, D. Homeier, P.H. Hauschildt, F. Allard Comments: 17 pages, 11 figures, accepted by A&A Po dannym VLT sostavlen spektral'nyi atlas vysokogo razresheniya dlya treh L i odnogo T karlika. Rezul'taty sravnivayutsya s modelyami. Chto-to oni opisyvayut horosho, a chto-to - ne ochen'.
Authors: Russell M. Kulsrud, Ellen G. Zweibel Comments: 64 pages and 6 figures; an invited review for Reports in Physics Otkuda vzyalis' magnitnye polya - ne yasno. Problema v tom, "chto bylo v samom nachale". Esli est' hot' slabye polya, to pridumano uzhe dostatochno mnogo mehanizmov dlya ih usileniya (o nih tozhe idet rech' v obzore). No otkuda vzyat' zachatochnye (seed) polya? Interesno? Chitaite!
My budem starat'sya hotya by perechislit' interesnye (dlya shirokoi publiki) stat'i, poyavivshiesya v razdele physics (vklyuchaya cross-listing).
Authors: V. Djokovic, P. Grujic Comments: 21 pages V stat'e rassmotreny religioznye vzglyady Einshteina. Ne berus' sudit' o kachestve stat'i s tochki zreniya professional'nyh filosofov i psihologov, no mnogo interesnogo.
Authors: Marko Horvat Comments: 10 pages, 1 figure, 2 tables International Journal of Astrobiology, 5, 143-149 (2006)
"Tak oni ee i ne poimali".
Authors: C.J. Efthimiou, R.A. Llewellyn Comments: includes 28 pictures; invited article for the German journal Praxis der Naturwissensch Physik Dostatochno spornoe zanyatie: razbirat', chto ne tak s zakonami fiziki v tryukah v fil'mah. No est' ves'ma zanimatel'nye primery.
Authors: G. E. Stedman, R. B. Hurst, K. U. Schreiber Comments: 11 pages, accepted optics communications Krome vsem privychnyh lazerov est' eshe i t.n. kol'cevye. O nih mozhno pochitat' zdes' ili v Vikipedii (sm. takzhe stat'yu pro effekt San'yaka). Avtory obsuzhdayut vozmozhnye primeneniya etih ustroistv dlya registracii geofizicheskih signalov i dazhe gravitacionnyh voln!
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