Rambler's Top100Astronet    
  po tekstam   po klyuchevym slovam   v glossarii   po saitam   perevod   po katalogu
 

Obzoram ispolnilos'
pyat' let!


Podpiska na rassylku obzorov astro-ph na Subscribe.Ru
Chislo podpischikov perevalilo 2900! Spasibo vam, druz'ya!





  • 14.03.2007. Taina kolec sverhnovoi

  • 06.03.2007. BL Lac v zhestkom gamma

  • 21.09.2006. Vspyshka vnegalakticheskogo magnitara ili korotkii gamma-vsplesk?

  • 23.08.2006. Chernaya koshka obnaruzhena

  • 13.04.2006. On bol'she Plutona!
  • 07.04.2006. Disk vokrug anomal'nogo pul'sara
  • 29.03.2006. Samyi dalekii gamma-vsplesk: mesto rozhdeniya
  • 22.03.2006. Vega krutitsya volchkom
  • 21.03.2006. Tri goda raboty WMAP
  • 03.03.2006. S chem mozhno pereputat' sverhnovuyu?

    Soderzhanie i bystryi perehod k razdelam obzora


    Stat'i nedeli
    "Luchshie iz luchshih"

  • arxiv/0707.0305
    Razmer akkrecionnogo diska kvazara - otnoshenie k masse chernoi dyry
  • arxiv/0707.0544
    Katalog malomassivnyh rentgenovskih dvoinyh v Galaktike i Magellanovyh oblakah (chetvertoe izdanie)
  • arxiv/0707.0549
    Katalog massivnyh rentgenovskih dvoinyh v Galaktike (chetvertoe izdanie)
  • arxiv/0707.2638
    Spektr kosmicheskih luchei sverhvysokih energii po dannym observatorii imeni P'era Ozhe i ego astrofizicheskie prilozheniya

    Otdel'nye stat'i
  • Nablyudeniya AYaG v diapazone GeV/TeV s pomosh'yu teleskopa MAGIC
  • Evolyuciya mikrovolnovogo reliktovogo fona
  • Prostranstvennaya struktura akkrecionnogo diska
  • Razmer akkrecionnogo diska kvazara - otnoshenie k masse chernoi dyry
  • Glubokie nablyudeniya slabyh rentgenovskih odinochnyh neitronnyh zvezd na VLT
  • Katalog malomassivnyh rentgenovskih dvoinyh v Galaktike i Magellanovyh oblakah (chetvertoe izdanie)
  • Katalog massivnyh rentgenovskih dvoinyh v Galaktike (chetvertoe izdanie)
  • SN 1993J VLBI (IV): geometricheskoe opredelenie rasstoyaniya do M81 po rasshiryayusheisya udarnoi volne
  • Astrofizika v Yuzhnoi Afrike
  • Nablyudeniya na VLT central'nogo kompaktnogo istochnika v ostatke sverhnovoi Vela Dzhunior
  • Reliktovoe izluchenie na Yuzhnom polyuse: proshloe, nastoyashee i budushee
  • K ponimaniyu obrazovaniya massivnyh zvezd
  • Ukazanie na sushestvovanie korotkozhivushih praroditelei sverhnovyh Ia
  • Drugaya Geminga: poisk radio i rentgenovskih pul'sacii ot neitronnoi zvezdy, associiruemoi s 3EG J1835+5918
  • Sverhorbital'naya peremennost' rentgenovskogo i radioizlucheniya ot Cyg X-1: I. Anizotropiya izlucheniya precessiruyushih istochnikov
  • Polnyi katalog gamma-vspleskov, nablyudavshihsya shirokopol'nymi kamerami na bortu BeppoSAX
  • Relyativistskie dzhety i dlinnye gamma-vspleski ot rozhdayushihsya magnitarov
  • Hromosfernaya dinamika i obrazovanie linii
  • O bystrom kollapse i evolyucii molekulyarnyh oblakov
  • Tochnye izmereniya goryachego neptuna GJ 436b v infrakrasnom diapazone na Spitcere
  • Novaya vyborka malomassivnyh chernyh dyr v aktivnyh galaktikah
  • Spektr kosmicheskih luchei sverhvysokih energii po dannym observatorii imeni P'era Ozhe i ego astrofizicheskie prilozheniya
  • Spektral'nyi atlas buryh karlikov
  • Proishozhdenie astrofizicheskih magnitnyh polei


    Iz razdela physics
  • Al'bert Einshtein - blagochestivyi ateist
  • Vychislenie veroyatnosti obnaruzheniya radiosignalov ot vnezemnyh civilizacii
  • Gollivudskie blokbastery: neogranichennoe udovol'stvie, no ogranichennaya nauchnaya dostovernost'
  • O potenciale bol'shih kol'cevyh lazerov


    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
    (36.9 Mb; *.tar.gz)
    gzip homepage

    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 2001-2003 gg.


    Avtor proekta
    Sergei Popov


    Diskussii po stat'yam Arhiva

    PhysComments
    CosmoCoffee



    Postav'te u sebya nashu knopku!


    Proekt razmeshen na saitah:



    Smotri takzhe diskussii i blogi:


    Informacionnye partnery


    Vy mozhet takzhe razmestit' na svoem saite nashu lentu obzorov








    Kniga avtora obzorov
    Novostnye lenty
    Novosti kosmonavtiki
    Novosti Nauchpopa
    Novosti ot UFN
    Informnauka
    Researcher@
    Elementy.Ru
    Grani.Ru
    Perst

    Podpiska na rassylku obzorov na Subscribe.Ru



    Druzhestvennye rassylki:
    "Astronomiya segodnya"
    "Okno vo Vselennuyu"

    Spisok astrorassylok


  • Obzory preprintov astro-ph

    Vypusk N163
    astro-ph za 01 - 19 iyulya 2007 goda: izbrannye stat'i

    Referaty otdel'nyh statei



    arxiv:0706.4439 Nablyudeniya AYaG v diapazone GeV/TeV s pomosh'yu teleskopa MAGIC (AGN Observations in the GeV/TeV Energy Range with the MAGIC Telescope)
    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.


    arxiv:0706.4482 Evolyuciya mikrovolnovogo reliktovogo fona (The Evolution of the Cosmic Microwave Background)
    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.


    arxiv:0707.0003 Prostranstvennaya struktura akkrecionnogo (The Spatial Structure of An Accretion Disk)
    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).


    arxiv:0707.0305 Razmer akkrecionnogo diska kvazara - otnoshenie k masse chernoi dyry (The Quasar Accretion Disk Size - Black Hole Mass Relation)
    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.

    Obsudit' v ZhZh-soobshestve ru_astroph.
    Obsudit' na Astroforume v Nauchnoi panorame.


    arxiv:0707.0516 Glubokie nablyudeniya slabyh rentgenovskih odinochnyh neitronnyh zvezd na VLT (Deep VLT infrared observations of X-ray Dim Isolated Neutron Stars)
    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.


    katalog arxiv:0707.0544 Katalog malomassivnyh rentgenovskih dvoinyh v Galaktike i Magellanovyh oblakah (chetvertoe izdanie) (A catalogue of low-mass X-ray binaries in the Galaxy, LMC, and SMC (Fourth edition))
    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.


    katalog arxiv:0707.0549 Katalog massivnyh rentgenovskih dvoinyh v Galaktike (chetvertoe izdanie) (Catalogue of high-mass X-ray binaries in the Galaxy ($4^{th}$ edition))
    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.


    arxiv:0707.0881 SN 1993J VLBI (IV): geometricheskoe opredelenie rasstoyaniya do M81 po rasshiryayusheisya udarnoi volne (SN 1993J VLBI (IV): A Geometric Determination of the Distance to M81 with the Expanding Shock Front Method)
    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).


    obzor arxiv:0707.0921 Astrofizika v Yuzhnoi Afrike (Astrophysics in Southern Africa)
    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.


    arxiv:0707.0937 Nablyudeniya na VLT central'nogo kompaktnogo istochnika v ostatke sverhnovoi Vela Dzhunior (VLT observations of the Central Compact Object in the Vela Jr. supernova remnant)
    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....


    miniobzor arxiv:0707.1075 Reliktovoe izluchenie na Yuzhnom polyuse: proshloe, nastoyashee i budushee (CMB from the South Pole: Past, Present, and Future)
    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.


    obzor arxiv:0707.1279 K ponimaniyu obrazovaniya massivnyh zvezd (Toward Understanding Massive Star Formation)
    Authors: Hans Zinnecker, Harold W. Yorke
    Comments: 139 pages, 18 figures, 5 tables, glossary

    Gigantskii obzor po obrazovaniyu massivnyh zvezd. Vklyucheno ochen' mnogo materiala.


    arxiv:0707.1328 Ukazanie na sushestvovanie korotkozhivushih praroditelei sverhnovyh Ia (Evidence for short-lived SN Ia progenitors)
    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).


    arxiv:0707.1547 Drugaya Geminga: poisk radio i rentgenovskih pul'sacii ot neitronnoi zvezdy, associiruemoi s 3EG J1835+5918 (The Next Geminga: Search for Radio and X-ray Pulsations from the Neutron Star Identified with 3EG J1835+5918)
    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.


    arxiv:0707.1880 Sverhorbital'naya peremennost' rentgenovskogo i radioizlucheniya ot Cyg X-1: I. Anizotropiya izlucheniya precessiruyushih istochnikov (Superorbital variability of X-ray and radio emission of Cyg X-1. I. Emission anisotropy of precessing sources)
    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.


    katalog arxiv:0707.1900 Polnyi katalog gamma-vspleskov, nablyudavshihsya shirokopol'nymi kamerami na bortu BeppoSAX (The complete catalogue of gamma-ray bursts observed by the Wide Field Cameras on board BeppoSAX)
    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.


    arxiv:0707.2100 Relyativistskie dzhety i dlinnye gamma-vspleski ot rozhdayushihsya magnitarov (Relativistic Jets and Long-Duration Gamma-ray Bursts from the Birth of Magnetars)
    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.


    obzor arxiv:0707.2166 Hromosfernaya dinamika i obrazovanie linii (Chromospheric Dynamics and Line Formation)
    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.


    arxiv:0707.2252 O bystrom kollapse i evolyucii molekulyarnyh oblakov (On the Rapid Collapse and Evolution of Molecular Clouds)
    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.


    arxiv:0707.2261 Tochnye izmereniya goryachego neptuna GJ 436b v infrakrasnom diapazone na Spitcere (Accurate Spitzer infrared radius measurement for the hot Neptune GJ 436b)
    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.


    arxiv:0707.2617 Novaya vyborka malomassivnyh chernyh dyr v aktivnyh galaktikah (A New Sample of Low-mass Black Holes in Active Galaxies)
    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...


    arxiv:0707.2638 Spektr kosmicheskih luchei sverhvysokih energii po dannym observatorii imeni P'era Ozhe i ego astrofizicheskie prilozheniya (The UHECR spectrum measured at the Pierre Auger Observatory and its astrophysical implications)
    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.
    Obsudit' na Astroforume v Nauchnoi panorame.


    arxiv:0707.2652 Spektral'nyi atlas buryh karlikov (A high resolution spectral atlas of brown dwarfs)
    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'.


    obzor arxiv:0707.2783 Proishozhdenie astrofizicheskih magnitnyh polei (The Origin of Astrophysical Magnetic Fields)
    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).


    arxiv:0706.4400 Al'bert Einshtein - blagochestivyi ateist (Albert Einstein - a Pious Atheist)
    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.


    arxiv:0707.0011 Vychislenie veroyatnosti obnaruzheniya radiosignalov ot vnezemnyh civilizacii (Calculating the probability of detecting radio signals from alien civilizations)
    Authors: Marko Horvat
    Comments: 10 pages, 1 figure, 2 tables International Journal of Astrobiology, 5, 143-149 (2006)

    "Tak oni ee i ne poimali".
    Ocherednaya popytka ocenit' veroyatnost' registracii signalov ot zelenyh chelovechkov. Poluchenie konkretnyh znachenii okruzheno takim kolichestvom "esli", chto, na moi vzglyad, vsyakii smysl ocenok teryaetsya.


    arxiv:0707.1167 Gollivudskie blokbastery: neogranichennoe udovol'stvie, no ogranichennaya nauchnaya dostovernost' (Hollywood Blockbusters: Unlimited Fun but Limited Science Literacy)
    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.


    arxiv:0707.1377 O potenciale bol'shih kol'cevyh lazerov (On the Potential of Large Ring Lasers)
    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!



    Publikacii s klyuchevymi slovami: astro-ph - elektronnye preprinty
    Publikacii so slovami: astro-ph - elektronnye preprinty
    Sm. takzhe:
    Vse publikacii na tu zhe temu >>

    Ocenka: 2.6 [golosov: 31]
     
    O reitinge
    Versiya dlya pechati Raspechatat'

    Astrometriya - Astronomicheskie instrumenty - Astronomicheskoe obrazovanie - Astrofizika - Istoriya astronomii - Kosmonavtika, issledovanie kosmosa - Lyubitel'skaya astronomiya - Planety i Solnechnaya sistema - Solnce


    Astronet | Nauchnaya set' | GAISh MGU | Poisk po MGU | O proekte | Avtoram

    Kommentarii, voprosy? Pishite: info@astronet.ru ili syuda

    Rambler's Top100 Yandeks citirovaniya