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
astro-ph/0411450
Temp sverhnovyh na edinicu massy
astro-ph/0411507
Dinamika pul'sarov: peresmotr modeli magnitnogo dipolya
astro-ph/0411796
PSR J1756-2251: novaya relyativistskaya dvoinaya neitronnaya zvezda
GALEX
Otdel'nye stat'i
Issledovaniya s instrumentami Virtual'noi Observatorii
Izuchenie obrazovaniya kompaktnyh ob'ektov i nachal'nyh skorostei otdachi
I. Metody vychislenii i sluchai istochnika GRO J1655-40
Otvechayut li kiki sverhnovyh za vybros rentgenovskih dvoinyh iz molodyh
skoplenii?
Temp sverhnovyh na edinicu massy
Ierarhicheskoe sliyanie, ul'tramoshnye i gipermoshnye rentgenovskie
istochniki
Dinamika pul'sarov: peresmotr modeli magnitnogo dipolya
Grelka dlya stareyushih neitronnyh zvezd
Strapel'ki v kosmicheskih luchah
Ot Edelweiss-I k Edelweiss-II
Vvedenie v galakticheskoe dinamo
MASTER: Mobil'naya Astronomicheskaya Sistema TEleskopov-Robotov
PSR J1756-2251: novaya relyativistskaya dvoinaya neitronnaya zvezda
Iz razdela physics
Opisanie i razvitie eksperimentov Neitrinnaya fabrika i Beta Puchok
Mnogougol'nye steny i astronomicheskaya orientaciya Akropolya Alatri (Italiya)
Solnechnye neitrino
Special'naya teoriya otnositel'nosti dlya shkol'nikov
Gubitel'noe vliyanie nacistskogo rezhima na nauku - bibliometricheskii
analiz
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 2001-2003 gg.
|
Obzory preprintov astro-ph
Vypusk N92
astro-ph za 15 - 30 noyabrya 2004 goda:
izbrannye stat'i
Goryachie temy nedeli
GALEX
My uzhe
pisali ob orbital'nom ul'trafioletovom teleskope GALEX.
Na etoi nedele poyavilas' seriya rabot, v kotoryh opisyvayutsya rezul'taty,
poluchennye v eksperimente GALEX.
Nachnem s obzornyh statei
The Galaxy Evolution Explorer: A Space Ultraviolet Survey Mission i
The On-Orbit Performance of
the Galaxy Evolution Explorer.
Daetsya obzor teleskopa, zapushennogo v kosmos v aprele 2003 g.
Zatem predstavleno neskol'ko rezul'tatov, poluchennyh za vremya raboty
sputnika.
Eto nablyudeniya galaktik M32 (sputnik Tumannosti Andromedy) -
astro-ph/0411304,
M83 - astro-ph/0411306,
M82 i NGC 253 (eto dve galaktiki s moshnym zvezdoobrazovaniem) -
astro-ph/0411309,
M31 i M33 - astro-ph/0411311.
Drugie raboty mozhno naiti
zdes'.
Vse oni voidut v special'nyi vypusk Astrophysical Journal Letters.
Ssylki na vse publikacii po GALEX mozhno naiti
zdes'.
Referaty otdel'nyh statei
astro-ph/0411333
Issledovaniya s instrumentami Virtual'noi Observatorii
(Science with Virtual Observatory Tools)
Authors: P. Padovani
Comments: 10 pages, 2 figures, invited talk at the Astronomical Data
Analysis
Software & Systems XIV, Pasadena, USA, October 2004, P. L. Shopbell, M. C.
Britton, and R. Ebert, in press
Prodolzhaetsya sozdanie/razrabotka proekta Virtual'noi observatorii.
Sut' proekta v tom, chtoby mnozhestvo dannyh nablyudenii (imeyutsya vvidu arhivy)
byli by dostupny astronomam cherez set' v edinom formate. Razumeetsya,
rezul'taty s novyh missii i teleskopov budut potom popadat' v bazu
Virtual'noi observatorii. Uzhe polucheny pervye rezul'taty.
Avtor predstavlyaet original'nye rezul'taty, poluchennye s pomosh'yu
prototipa Virtual'noi observatorii. Iz dannyh GOODS udalos' vydelit' 68
ranee neizvestnyh aktivnyh yader vtorogo tipa (eto aktivnye yadra s sil'nym
poglosheniem izlucheniya, vozmozhno za schet tora, vrashayushegosya vokrug
central'noi sverhmassivnoi chernoi dyry).
Takzhe sm. eshe odnu
stat'yu, posvyashennuyu Virtual'noi observatorii.
astro-ph/0411423
Izuchenie obrazovaniya kompaktnyh ob'ektov i nachal'nyh skorostei otdachi
I. Metody vychislenii i sluchai istochnika GRO J1655-40
(Understanding Compact Object Formation and Natal Kicks I. Calculation
Methods and the case of GRO J1655-40)
Authors: B. Willems et al.
Comments: 56 pages, submitted to ApJ
Vzryv sverhnovoi otpechatyvaetsya v dal'neishei sud'be kompaktnogo ob'ekta
(neitronnoi zvezdy ili chernoi dyry). Poskol'ku detal'naya teoriya vzryva eshe
ne sozdana, predstavlyaetsya razumnym vosstanovit' maksimum informacii po
takomu "otpechatku".
Esli my vidim rentgenovskuyu sistemu s kompaktnym ob'ektom, to my mozhem
popytat'sya vosstanovit' ego istoriyu. Seichas dlya mnogih takih sistem est'
dannye o prostranstvennoi skorosti. Eto pozvolyaet ocenit' kakuyu
dopolnitel'nuyu skorost' (kik) poluchil kompaktnyi ob'ekt v rezul'tate vzryva.
Avtory dannoi stat'i namerevayutsya v budushem provesti takie rassledovaniya dlya
mnozhestva dvoinyh sistem. Poka zhe predstavleny detali metody, a takzhe dana
illyustraciya na primere kandidata v chernye dyry GRO J1655-40.
Po vsei vidimosti pri svoem rozhdenii chernaya dyra poluchila nebol'shoi kik
(kick - udar, tolchok), v rezul'tate chego priobrela skorost' v neskol'ko
desyatkov kilometrov v sekundu. Opredelenie takogo parametra dlya neskol'kih
kandidatov v chernye dyry pozvolit sushestvenno prodvinut'sya v ponimanii togo,
kak chernye dyry obrazuyutsya.
astro-ph/0411425
Otvechayut li kiki sverhnovyh za vybros rentgenovskih dvoinyh iz molodyh
skoplenii?
(Are Supernova Kicks Responsible for X-ray Binary Ejection from Young
Clusters?)
Authors: J. Sepinsky, V. Kalogera, K. Belczynski
Comments: 4 pages, 1 figure. Submitted to Astrophysical Journal Letters
Eshe odna stat'ya, posvyashennaya kikam.
Sovremennye rentgenovskie nablyudeniya otlichayutsya dostatochno vysokim uglovm
razresheniem. V chastnosti, eto pozvolyaet opredelyat' dostatochno tochnye
polozheniya rentgenovskih istochnikov v galaktikah.
Massivnye rentgenovskie dvoinye - eto molodye ob'ekty. Bol'shinstvo iz nih
dolzhny byli obrazovyvat'sya v molodyh massivnyh zvezdnyh skopleniyah.
Nablyudeniya pokazyvayut, chto istochniki neskol'ko smesheny otnositel'no
skoplenii. Razumno predpolozhit', chto smeshenie svyazano s tem, chto istochniki
priobreli dopolnitel'nuyu skorost' posle vzryva odnoi iz komponent sistemy.
Takoe predpolozhenie neobhodimo proverit', chto i delayut avtory stat'i.
Rezul'taty raschetov okazyvayutsya v sootvetstvii s gipotezoi o tom, chto
imenno skorost' otdachi otvetstvenna za vybros dvoinyh sistem iz skoplenii.
astro-ph/0411450
Temp sverhnovyh na edinicu massy
(The supernova rate per unit mass)
Authors: F. Mannucci et al.
Comments: 10 pages, A&A, in press
Po dannym nablyudenii avtory rasschityvayut temp sverhnovyh razlichnyh tipov
dlya galaktik raznyh tipov,
normiruya etu velichinu na massu galaktiki i na svetimost' v IK diapazone.
Interesnym rezul'tatom yavlyaetsya sushestvennoe vozrastanie tempa sverhnovyh Ia
v galaktikah pozdnih tipov (spirali i nepravil'nye galaktiki).
Poyasnim vazhnost' etogo utverzhdeniya. Schitaetsya, chto sverhnovye Ia svyazany so
vzryvom belogo karlika, kotoryi nabral massu ili iz-za akkrecii, ili iz-za
sliyaniya s drugim belym karlikom. Takie sverhnovye tradicionno svyazyvayut so
starym naselenie galaktiki (trebuetsya vremya dlya obrazovaniya belogo karlika,
a takzhe dlya akkrecii znachitel'noi massy veshestva ili dlya sliyaniya).
To, chto temp takih sverhnovyh sushestvenno vyshe (na edinicu massy) dlya
galaktik s dostatochno aktivnym zvezdnym obrazovaniem, govorit, chto ne vse
tak prosto. V chastnosti, eto nanosit udar po modeli sliyaniya dvuh belyh
karlikov. Krome togo, vozmozhno, chto est' dva tipa sverhnovyh Ia: odin svyazan
so starym naseleniem (eti slabye sverhnovye), drugoi -- s molodym naseleniem
spiral'nyh i nepravil'nyh galaktik (eto bolee yarkie sverhnovye Ia).
astro-ph/0411489
Ierarhicheskoe sliyanie, ul'tramoshnye i gipermoshnye rentgenovskie
istochniki
(Hierarchical Merging, Ultraluminous and Hyperluminous X-ray Source)
Authors: Andrew R. King, Walter Dehnen
Comments: accepted for publication in MNRAS, 4 pages, no figures
Ul'tramoshnye istochniki po-prezhnemu privlekayut nashe vnimanie (snova
napomnim, chto v blizhaishem nomere Zvezdocheta budet stat'ya, posvyashennaya etim
ob'ektam).
V dannoi rabote avtory obsuzhdayut, otkuda mozhno vzyat' chernye dyry
promezhutochnyh mass, i pochemu ul'tramoshnye istochniki nablyudayutsya
preimushestvenno v oblastyah zvezdoobrazovaniya.
Ideya sostoit v tom, chto vsemu vinoi pogloshenie bol'shoi galaktikoi bolee
melkih sputnikov. Chernye dyry promezhutochnyh mass - eto central'nye ob'ekty
malomassvinyh galaktik. Zvezdoobrazovanie zhe provociruetsya samim sliyaniem.
Otmetim ot sebya, chto avtory ne rassmatrivayut vopros o zahvate chernoi dyroi
kompan'ona, i zdes' mogut byt' problemy. Neobhodimo, chtoby za korotkoe vremya
chernaya dyra uspela zahvatit' zvezdu, a ved' zvezdu eshe nuzhno sformirovat'
(ved' zvezdoobrazovanie sprovocirovano sliyaniem)!
Nashi sobstvennye ocenki "na salfetke" pokazyvayut, chto tut vse velichiny na
predele, a znachit nuzhno provodit' detal'noe modelirovanie.
(Sobstvenno nasha - S.P. - ideya sostoyala v sliyanii ne s galaktikoi-sputnikom,
a s ostavshimsya "pervichnym" malomassivnym galo s chernoi dyroi v centre.
Zvezdoobrazovanie vyzyvaetsya udarom gaza galo o gaz diska galaktiki.
Chernaya dyra slishkom bystro proletaet cherez disk galaktiki, chtoby uspet'
zahvatit' novoobrazovavshuyusya zvezdu.)
astro-ph/0411507
Dinamika pul'sarov: peresmotr modeli magnitnogo dipolya
(Pulsar dynamics: magnetic dipole model revisite)
Authors: G. Lugones, I. Bombaci
Comments: 4 pages, 3 figures, submitted to Physical Review Letters
Na nash vzglyad - eto vazhnaya i interesnaya rabota. Odin iz voprosov, kotoryi
my zadaem sebe - "pochemu my sami ne dogadalis'?" (odin iz avtorov napisal
nam, chto on sam byl udivlen, chto za 37 let izucheniya pul'sarov nikto ne
sdelal takih prostyh ocenok).
Avtory obrashayutsya k klassicheskoi modeli zamedleniya neitronnoi zvezdy. V etoi
modeli vrashenie tormozitsya za schet sushestvovaniya magnitnogo polya.
Ne smotrya na neprekrashayushiesya spory o detalyah processa tormozheniya, vse
shodyatsya v tom, chto prostaya magnito-dipol'naya formula neploho opisyvaet
deistvitel'nost'. Imenno takaya formula ispol'zuetsya dlya ocenki magnitnogo
polya i vozrasta pul'sara po tempu ego zamedleniya.
German Lugones i Ignacio Bombachi rassmotreli, chto budet, esli prosteishim
obrazom uchest' neodnorodnost' vrasheniya neitronnoi zvezdy.
Poluchennye rezul'taty dostatochno interesny.
1. Magnitnoe pole okazyvaetsya raza v 4 vyshe, chem pole, opredelennoe po
standartnoi formule. Eto dovol'no interesno, t.k. okolo 100 pul'sarov
okazyvayutsya v oblasti sverhkriticheskogo (sverhshvingerovskogo) polya.
2. Vozrast pul'sara, ocenivaemyi po periodu i proizvodnoi perioda,
okazyvaetsya sushestvenno zavisyashim ot nachal'nogo perioda. Eto mozhet pomoch'
snyat' protivorechie v raznyh ocenkah vozrasta po parametram perioda i po
nablyudaemym ostatkam sverhnovyh.
astro-ph/0411560
Grelka dlya stareyushih neitronnyh zvezd
(A Hot Water Bottle for Aging Neutron Stars)
Authors: Mark Alford et al.
Comments: 14 pages, 5 figures
Kvantovaya hromodinamika predskazyvaet, chto pri vysokih plotnostyah,
harakternyh dlya nedr neitronnyh zvezd, veshestvo mozhet okazyvat'sya v
razlichnyh interesnyh sostoyaniyah. Detali eto izucheny kraine ploho, chto
svyazano kak s trudnost'yu raschetov, tak i s otsutstviem eksperimental'nyh
dannyh. Poetomu fiziki vse chashe i chashe obrashayutsya k astronomicheskim dannym.
V etoi stat'e avtory predskazyvayut, chto nalichie dazhe nebol'shogo kolichestva
veshestva v odnoi iz takih interesnyh faz (my ne budem vdavat'sya v detali,
chto takoe gapless color-flavour locked phase) privedet k tomu, chto
ohlazhdenie zvezdy na fotonnoi stadii (kogda izluchenie neitrino uzhe ne vnosit
osnovnogo vklada, a energiya unositsya fotonami s poverhnosti) poidet
medlennee standartnogo. Kak budto v nedrah zvezdy est' grelka, kotoraya ne
daet ei bystro ostyt'.
Nablyudeniya neitronnyh zvezd s vozrastami poryadka milliona let (eto mogut
byt' ob'ekty
Velikolepnoi semerki)
dolzhny v budushem dat' otvet na vopros o
neobhodimosti takoi grelki.
Sm. takzhe stat'yu
po ostyvaniyu gibridnyh zvezd.
astro-ph/0411601
Strapel'ki v kosmicheskih luchah
(Cosmic ray strangelets)
Authors: Jes Madsen
Comments: 8 pages. SQM2004 plenary talk. Submitted to Journal of Physics
G
My neodnokratno obrashalis' k rabotam, posvyashennym strannoi materii.
Napomnim, chto ishut ee (v astrofizike) v forme kvarkovyh zvezd i v forme
osobogo podvida kosmicheskih luchei. "Strapel'ki" - kapel'ki strannogo
veshestva - otnositsya kak raz k poslednemu.
Osnovnoi upor v stat'e sdelan na vozmozhnoe detektirovanie strapelek v
eksperimente AMS-2 na Mezhdunarodnoi kosmicheskoi stancii (napomnim, chto
prototip etogo eksperimenta videl nechto, chto pri zhelanii mozhno
interpretirovat' kak strapel'ki). Predskazaniya dostatochno optimistichny.
Stat'ya napisana ochen' dostupno, formul prakticheski net. Rekomenduem.
astro-ph/0411629
Ot Edelweiss-I k Edelweiss-II
(From Edelweiss-I to Edelweiss-II)
Authors: V.Sanglard, for the EDELWEISS collaboration
Comments: 6 pages, 3 figures, to appear in the Proceedings of the 5th
International Workshop on the Identification of Dark Matter (IDM2004),
eds. N.Spooner and V.Kudryavstev
Opisan eksperiment, ispol'zuyushii germanievye kriogennye detektory dlya
poiska temnoi materii. Pervyi etap raboty ustanovki zavershen. Vperedi bolee
chuvstvitel'nye nablyudeniya.
obzor
astro-ph/0411739
Vvedenie v galakticheskoe dinamo
(Introduction to galactic dynamos)
Authors: Anvar Shukurov
Comments: 58 pages, 8 figures; to be published in "Mathematical Aspects
of Natural Dynamos", EDP Press
Kak izvestno, vo Vselennoi magnitnye polya sushestvuyu na samyh raznyh
masshtabah. Est', v tom chisle, i galakticheskoe magnitnoe pole.
Ono kak-to bylo sozdano, i ego postoyanno neobhodimo podderzhivat'.
Na segodnyashnii den' teoriya galakticheskogo dinamo s odnoi storony dostatochno
horosho razrabotana, s drugoi - est' ryad nereshennyh voprosov.
Obo vsem etom - v obzore Anvara Shukurova.
astro-ph/0411757
MASTER: Mobil'naya Astronomicheskaya Sistema TEleskopov-Robotov
(MASTER: The Mobile Astronomical System of Telescope-Robots)
Authors: V.M. Lipunov et al.
Comments: 3 pages, 2 figures, Astronomische Nachrichten, 2004, 325,
580-582
Kratkoe opisanie sistemy MASTER,
ustanovlennoi v podmoskov'e. Kompleks prednaznachen v pervuyu ochered' dlya
poiska opticheskogo izlucheniya ot gamma-vspleskov na nachal'noi stadii vspyshki.
Odnako proekt mozhet davat' (i daet) i drugie interesnye rezul'taty.
astro-ph/0411796
PSR J1756-2251: novaya relyativistskaya dvoinaya neitronnaya zvezda
(PSR J1756-2251: a new relativistic double neutron star system)
Authors: A.J.Faulkner et al.
Comments: Accepted by ApJ Letters. 4 published pages, 3 figures and 2
tables
Po vsei vidimosti otkryta novaya sistema, sostoyashaya iz dvuh neitronnyh
zvezd, odna iz kotoryh nablyudaetsya kak radiopul'sar.
Nablyudeniya pokazali, chto polnaya massa sistemy PSR J1756-2251 sostavlyaet
2.574+/-0.003 solnechnoi massy (na samom dele, poka ocenka model'no
zavisima). Odin iz komponent - pul'sar - tochno yavlyaetsya neitronnoi zvezdoi.
Massy neitronnyh zvezd sostavlyayut 1.2-2 solnechnye massy. Znachit, na vtoroi
kompan'on prihoditsya primerno 0.6-1.4 massy solnca. Veroyatnee vsego, on
yavlyaetsya malomassivnoi neitronnoi zvezdoi s massoi <1.25 massy solnca.
My budem starat'sya hotya by perechislit' interesnye (dlya shirokoi publiki)
stat'i, poyavivshiesya v razdele
physics
(vklyuchaya cross-listing).
physics/0411123
Opisanie i razvitie eksperimentov Neitrinnaya fabrika i Beta Puchok
(The Neutrino Factory and Beta Beam Experiments and Development)
Authors: The Neutrino Factory/Muon Collider Collaboration
Comments: 115 pages; 71 figures. The Neutrino Factory and Beta Beam
Experiments and Development Working Group report to the Joint
DNP/DPF/DAP/DPB Study on the Future of Neutrino Physics
Eta bol'shoi otchet po eksperimentu, gotovyashemusya kollaboraciei
Neutrino Factory/Muon Collider.
Predlozheno dve novyh eksperimental'nye ustanovki: neitrinnaya fabrika i
Beta-puchok (Beta Beam). V osnovnom oni prednaznacheny dlya detal'nogo
issledovaniya neitrino (v chastnosti, dlya izmereniya mass neitrino treh
sortov).
Poka ustanovki nahodyatsya v stadii razrabotki: takie eksperimenty planiruyutsya
godami.
physics/0411130
Mnogougol'nye steny i astronomicheskaya orientaciya Akropolya Alatri (Italiya)
(Polygonal walls and the astronomical alignments of the Acropolis of Alatri,
Italy: a preliminary investigation)
Authors: Giulio Magli
Comments: 12 pages, 10 figures
Alatri -
nebol'shoi ital'yanskii gorodok v oblasti Lacium (Lazio), t.e. nedaleko ot
Rima.
Avtor issleduet orientaciyu akropolya, a takzhe drevnie steny goroda.
Osnovnoi vopros v tom kto i kogda vse eto postroil.
physics/0411190
Solnechnye neitrino
(Solar Neutrinos: A Popular Account)
Authors: John N. Bahcall
Comments: To appear in the 3rd edition of the Encyclopedia of Physics,
eds. G. Trigg and R. Lerner (Wiley-VCH, Weinheim 2005)
Stat'ya po solnechnym neitrino, napisannaya Dzhonom Bakalom dlya Enciklopedii po
fizike. Navernoe, drugie kommentarii izlishni.
V dopolnenie stoit prochest' druguyu stat'yu
The Neutrino Matrix
physics/0411219
Special'naya teoriya otnositel'nosti dlya shkol'nikov
(Special Relativity for the School Going Child)
Authors: T. P. Singh
Comments: 15 pages, two figures. Elementary Article meant for 12-15 year
old schoolchildren. Published by TIFR, Mumbai in `A revolution in physics:
Einstein's 1905 discoveries made simple'
Izlozhenie nekotoryh osnov STO v vide rasskaza dlya detei 12-15 let.
physics/0411246
Gubitel'noe vliyanie nacistskogo rezhima na nauku - bibliometricheskii
analiz
(The disaster of the Nazi-power in science as reflected by some leading
journals and scientists in physics - A bibliometric study)
Authors: Manuel Cardona, Werner Marx
Comments: 8 pages, 10 figures, 1 table
Osnovyvayas' na dannyh ob indekse citirovaniya (po dannym Instituta Nauchnoi
Informacii - ISI), avtory rassmatrivayut nauchnuyu produktivnost' uchenyh,
vynuzhdennyh pokinut' fashistskuyu Germaniyu v 30-e gg.
Sovetuem takzhe obratit' vnimanie na grafik 1 v etoi rabote.
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