The R.A.P.Project "Prosto o slozhnom" "Astro-ph za vtoruyu polovinu 2003 g." Nemnogo statistiki Predydushii vypusk (N72) Slovar' astroterminov Spisok missii i teleskopov Obzory UFN Stat'i SOZh ANKa Dnya 24.03.2004. Obzor neba po dannym SIGMA 20.03.2004. Interesnyi dvoinoi radiopul'sar 17.03.2004. Populyacii rentgenovskih istochnikov v ploskosti Galaktiki Soderzhanie i bystryi perehod k razdelam obzora Stat'i nedeli "Luchshie iz luchshih" astro-ph/0403325 Vtoroi reliz Sloanovskogo Cifrovogo Obzora Neba astro-ph/0403453 Otkrytie millisekundnogo radiopul'sara v ochen' ekscentrichnoi dvoinoi sisteme astro-ph/0403373 Opticheskaya astronomiya v YuAR posle aparteida: 1994 - 2004 astro-ph/0403597 Giperbolicheskaya vselennaya s konicheskoi topologiei i anizotropiya relikta Otdel'nye stat'i Populyacii rentgenovskih istochnikov v ploskosti Galaktiki Slabye peremennye ob'ekty, otkrytye pri sravnenii katalogov POSS i SDSS Vtoroi reliz Sloanovskogo Cifrovogo Obzora Neba Akkreciya vetra v dvoinyh sistemah - I. Struktura i evolyuciya malomassivnyh sistem tipa W UMa Yavlyayutsya li nizshie garmoniki reliktovogo fona kosmologicheskimi? Opticheskaya astronomiya v YuAR posle aparteida: 1994 - 2004 Nesferichnost' Solnca i ee astrofizicheskaya znachimost' Teoriya polyarizacii kosmicheskogo mikrovolnovogo fona Temp vspyshek Gipernovyh i gamma-vspleskov: ih praroditeli Kineticheskaya teoriya vyazkosti Nablyudeniya TeV-nyh gamma-luchei ot centra Galaktiki Sverhnovaya, svyazannaya s rentgenovskoi vspyshkoi 031203 Otkrytie millisekundnogo radiopul'sara v ochen' ekscentrichnoi dvoinoi sisteme Obzor neba v zhestkom rentgene s pomosh'yu pribora SIGMA na bortu observatorii GRANAT Svoistva neitronnyh zvezd Diskussiya po kosmicheskim lucham sverhvysokih energii Temnoe barionnoe galo ne mozhet sostoyat' iz staryh belyh karlikov PSR J1829+2456: relyativistskii dvoinoi pul'sar Registraciya sub-TeVnogo gamma-izlucheniya ot galakticheskogo centra na ustanovke CANGAROO-II Giperbolicheskaya vselennaya s konicheskoi [rogopodobnoi] topologiei i anizotropiya relikta O mehanizme obrazovaniya malomassivnyh kompaktnyh ob'ektov Iz razdela physics V chem vopros? Al'truizm mozhet yavlyat'sya rezul'tatom otbora Duel': struny protiv petel' Ot "ne neverno" k (mozhet byt') verno 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 Druzhestvennaya rassylka "Okno vo Vselennuyu" Zamechatel'nyi sait Astronomiya i teleskopostroenie Sozdavaemyi katalog on-lainovoi nauchnoi literatury

Obzory preprintov astro-ph Vypusk N73 astro-ph za 16 - 31 marta 2004 goda: izbrannye stat'i Referaty otdel'nyh statei astro-ph/0403304 Populyacii rentgenovskih istochnikov v ploskosti Galaktiki (X-ray source populations in the Galactic Plane) Authors: A. D. P. Hands et al. Comments: 21 pages, 15 figures, accepted by MNRAS Sputnik HMM-N'yuton - odna iz dvuh krupneishih sovremennyh kosmicheskih rentgenovskih observatorii. Odna iz ego zadach - postroenie kataloga istochnikov v ploskosti Galaktiki vplot' do ochen' malyh potokov. V dannoi stat'e privodyatsya pervye rezul'taty po ploshadke primerno v tri kvadratnyh gradusa v napravlenii 19-22 gradusa ot centra Galaktiki v poyase +/-0.6 gradusov ot ee ploskosti. Na karte privedeno okolo 400 istochnikov s potokami vyshe 2 10-14 erg/sm2/s. Na slabyh potokah dominiruyut fonovye vnegalakticheskie istochniki. Sredi "myagkih" istochnikov (t.e. s osnovnym energovydeleniem v menee zhestkoi chasti spektra) - blizkie zvezdy s koronal'noi aktivnost'yu. Krome togo, avtory obsuzhdayut drugie tipy istochnikov, v pervuyu ochered' kataklizmicheskie peremennye i sistemy tipa RS CVn. Otmetim, chto ne isklyucheno, chto 2-3 myagkih (0.4-2 keV) istochnika (na risunke - krasnye) mogut yavlyat'sya odinochnymi akkreciruyushimi neitronnymi zvezdami. obzor astro-ph/0403319 Slabye peremennye ob'ekty, otkrytye pri sravnenii katalogov POSS i SDSS (Variable Faint Optical Sources Discovered by Comparing POSS and SDSS Catalogs) Authors: B.Sesar et al. Comments: 59 pages, 26 figures, submitted to AJ POSS (Palomar Observatory Sky Survey) - opticheskii katalog (fotometricheskii i astrometricheskii) vsego neba, povtoryayushii znamenityi Palomarskii obzor. Sostoit iz dvuh chastei (ili dvuh ocheredei): POSS I i POSS II. SDSS (Sloan Digital Sky Survey) - prodolzhayushiisya fotometricheskii i spektral'nyi(!) obzor primerno 1/4 neba, v osnovnom v napravlenii galakticheskih polyusov. (Sloan - familiya osnovatelya fonda, finansiruyushego provedenie dannogo obzora.) Podrobnee ob etom kataloge sm. astro-ph/0403325. Bylo provedeno sravnenie iz oblastei ploshad'yu 2000 kv.grad iz katalogov POSS i 1-i ocheredi SDSS. V rezul'tate etoi raboty vydeleno ~60000 peremennyh ob'ektov. Zametnymi sostavlyayushimi etoi gruppy yavlyayutsya kvazary i peremennye tipa RR Liry. Dlya kvazarov podtverzhdeno harakternoe vremya peremennosti poryadka 1 goda, dlya zvezd tipa RR Liry pokazano, chto oni otslezhivayut strukturu galo Galaktiki. (Eto, konechno, predvaritel'nye rezul'taty.) katalog astro-ph/0403325 Vtoroi reliz Sloanovskogo Cifrovogo Obzora Neba (The Second Data Release of the Sloan Digital Sky Survey) Authors: K. Abazajian et al. (the SDSS Collaboration) Comments: 24 pages, submitted to AJ. V publichnyi dostup vystavlen vtoroi reliz Sloanovskogo Cifrovogo Obzora Neba (SDSS=Sloan Digital Sky Survey). Teper' on pokryvaet 3324 kv.gradusa neba, soderzhit izobrazheniya i 5-cvetnuyu fotometriyu bolee chem 88 millionov ob'ektov, krome togo v nem soderzhatsya spektry 367360 galaktik i kvazarov. Glubina obzora v fil'tre r (r maloe) dostigaet 22 zvezdnoi velichiny. Astrometricheskaya tochnost' kataloga ~0.1". Pro etot katalog mozhno rasskazat' eshe mnogo interesnogo, no luchshe prochest' stat'yu ili posmotret' sait proekta skyserver.sdss.org. astro-ph/0403329 Akkreciya vetra v dvoinyh sistemah - I. (Wind accretion in binary stars - I. Mass accretion ratio) Authors: T.Nagae et al. Comments: 8 pages, accepted in Astron. Astroph. Esli zvezda v tesnoi dvoinoi sisteme ne zapolnyaet polost' Rosha, no blizka k etomu, i, odnovremenno, obladaet moshnym zvezdnym vetrom, to akkreciya mozhet byt' dostatochno moshnoi, a ee fizika - ochen' interesnoi. V dannoi rabote privedeny rezul'taty trehmernogo gidrodinamicheskogo modelirovaniya, provedennye gruppoi yaponskih issledovatelei. Tehnicheskaya storona (sobstvenno samo chislennoe modelirovanie) v stat'e rassmotrena ochen' kratko, zato mnogo graficheskih illyustracii. Osoboe vnimanie avtory udelyayut voprosu kachestvennomu razlichiyu struktury potokov pri akkrecii iz vetra (sil'noe nedozapolnenie polosti Rosha), pri techenii cherez tochku Lagranzha (polost' Rosha zapolnena) i v promezhutochnyh sluchayah (maloe otklonenie ot polosti Rosha). Sleva tipichnaya geometriya potoka pri akkrecii iz zvezdnogo vetra, sprava - pri zapolnenii polosti Rosha. astro-ph/0403337 Struktura i evolyuciya malomassivnyh sistem tipa W UMa (Structure and evolution of low mass W UMa type systems) Authors: Lifang Li, Zhanwen Han, Fenghui Zhang Comments: 12 pages, 10 figures, to be published in MNRAS Sistemy tipa W UMa (W Bol'shoi Medvedicy - po nazvaniyu peremennoi zvezdy -prototipa dannogo klassa zvezd) predstavlyayut soboi ochen' tesnye dvoinye zvezdy. Oba komponenta sistem etogo tipa nahodyatsya na glavnoi posledovatel'nosti i oba zapolnyayut svoi polosti Rosha. Veshestvo v takih sistemah peretekaet ot bolee massivnoi zvezdy k menee massivnoi, no eto "v srednem" na ochen' bol'shih intervalah vremeni, a na korotkih intervalah process nosit gorazdo bolee slozhnyh ciklicheskii harakter. Polnoi teorii evolyucii sistem dannogo tipa do sih por net. V dannoi stat'e privedeno dostatochno detal'noe rassmotrenie sovremennogo sostoyaniya etoi problemy. astro-ph/0403353 Yavlyayutsya li nizshie garmoniki reliktovogo fona kosmologicheskimi? (Is the low-l microwave background cosmic?) Authors: Dominik J. Schwarz et al. Comments: 4 pages, 3 figures; V nashih obzorah uzhe neskol'ko raz upominalis' stat'i, rassmatrivavshie etu temu: dipol' i kvadrupol' reliktovogo izlucheniya imeyut anomal'no nizkuyu amplitudu. Avtora dannoi stat'i ne mogut ob'yasnit' ih velichinu, no vyskazyvayut opredelennye somneniya: Dipol' i kvadrupol' korelliruyut drug s drugom. Ih vzaimnaya orientaciya ne yavlyaetsya sluchainoi, t.k. ih ploskosti pochti sovpadayut. Ploskosti dipolya i kvadrupolya pochti ortogonal'ny ekliptike. Ne sluchainoi (t.e. maloveroyatnoi) okazyvaetsya i ih orientaciya otnositel'no dipolya relikta (t.e. otnositel'no napravleniya dvizheniya Solnechnoi sistemy otnositel'no poverhnosti poslednego rasseyaniya). Sleda napravo: kvadrupol', oktupol' i summa treh pervyh garmonik. Punktirom pokazana ploskost' ekliptiki. Interesno. (Interesno, vzaimnaya orientaciya napravleniya dvizheniya Solnca vo Vselennoi i ploskosti ekliptiki, t.e. zemnoi orbity, tozhe ne sluchainy:?) astro-ph/0403373 Opticheskaya astronomiya v YuAR posle aparteida: 1994 - 2004 (Optical Astronomy in Post-Apartheid South Africa: 1994 to 2004) Authors: Patricia Whitelock (South African Astronomical Observatory) Comments: 19 pages, 5 figures Eto ne stat'ya, a, skoree, ocherk po "noveishei istorii astronomii". Period - S 1994 po 2004 gody - sootvetstvuet nashei "pozdnei perestroike". Yuzhno-Afrikancam mozhno tol'ko pozavidovat' ... astro-ph/0403382 Nesferichnost' Solnca i ee astrofizicheskaya znachimost' (The Sun Asphericities: Astrophysical Relevance) Authors: J-P. Rozelot et al. Comments: 14 pages, 9 figures Davno izuchayutsya i uzhe dostatochno horosho izvestny takie "klassicheskie" fundamental'nye parametry Solnca, kak diametr, massa, svetimost', temperatura poverhnosti i t.d. Ne menee vazhnym parametrom yavlyaetsya dipol'nyi i kvadrupol'nyi momenty nashego svetila. Pod etoi velichinoi avtor podrazumevaet momenty, otnosyashiesya k gravitacionnomu polyu Solnca. Ego nesferichnost' vyzyvaetsya raspredeleniem massy vnutri zvezdy i ne svyazana neposredstvenno s formoi ee poverhnosti (t.e. fotosfery). A proyavlyat'sya eti momenty budut, naprimer, v precessii orbit blizhaishih planet: Merkuriya (v pervuyu ochered'), Venery i Zemli. Prichem eto vliyaniya vpolne izmerimo planiruemymi na blizhaishee vremya eksperimentami. obzor astro-ph/0403392 Teoriya polyarizacii kosmicheskogo mikrovolnovogo fona (Theory of Cosmic Microwave Background Polarization) Authors: Paolo Cabella and Marc Kamionkowski Comments: 32 pages, 8 figures. Lectures given at the 2003 Villa Mondragone School of Gravitation and Cosmology: Za poslednie 2-3 goda bylo sdelano neskol'ko popytok izmereniya polyarizacii reliktovogo izlucheniya. Samaya udachnaya - s borta WMAP, no dazhe emu ne hvatilo dlya etogo chuvstvitel'nosti. Ser'eznye izmereniya etogo parametra nachnutsya s zapuskom "Planka". A teoriya uzhe est', i ona predskazyvaet dostatochno mnogo interesnogo. astro-ph/0403399 Temp vspyshek Gipernovyh i gamma-vspleskov: ih praroditeli (The Rates of Hypernovae and Gamma-Ray Bursts: Implications for their Progenitors) Authors: Ph. Podsiadlowski et al. Comments: Accepted by ApJ Lett., 12 pages, 0 figures Gipernovye - osobyi moshnyi tip sverhnovyh (obladayushih, veroyatno, eshe ryadom dopolnitel'nyh svoistv), schitaetsya vozmozhnym istochnikom gamma-vspleskov. Togda lyuboe predpolozhenie o tom kakie zvezdy v konce svoei evolyucii porozhdayut gipernovye, trebuet proverki chastoty ih vspyshek: gamma-vspleski proishodyat odin raz v 105-106 let v galaktike tipa Mlechnogo Puti. Eto ne neskol'ko poryadkov nizhe, chem tem vzryvov obychnyh sverhnovyh (s kollapsom yadra), chto, v chastnosti, pozvolyaet predpolozhit', chto gipernovye (i gamma-vspleski) vstrechayutsya tol'ko v dvoinyh sistemah. V dannoi stat'e rassmatrivayutsya razlichnye puti evolyucii dvoinyh sistem, kotorye zakanchivayutsya vzryvom gipernovoi i, sootvetstvenno/vozmozhno, gamma-vspleskom. astro-ph/0403407 Kineticheskaya teoriya vyazkosti (Kinetic theory viscosity) Authors: C.J. Clarke, J. E. Pringle Comments: 8 pages, 0 figures, Accepted in MNRAS Stat'ya, v kotoroi vyazkie Keplerovskie akkrecionnye diski opisyvayutsya v ramkah kineticheskoi teorii. Dostatochno interesno s teoreticheskoi tochki zreniya. astro-ph/0403422 Nablyudeniya TeV-nyh gamma-luchei ot centra Galaktiki (TeV Gamma-Ray Observations of the Galactic Center) Authors: K. Kosack, and the VERITAS Collaboration Comments: 15 pages Po seminaram uzhe nekotoroe vremya hodila informaciya o tom, chto na amerikanskoi nazemnoi gamma-observatorii VERITAS (Very Energetic Radiation Imaging Telescope Array System) poluchen znachimyi (no ne ochen' znachimyi) signal ot centra Galaktiki. I vot sobstvenno stat'ya. Posle 26-chasovoi ekspozicii (rezul'taty sobiralis' za neskol'ko nablyudenii s 1995 po 2003 gg.!) na urovne 3.7 sigma zaregistrirovan potok TeV-nogo izlucheniya ot nebol'shoi (15 uglovyh minut) oblasti, kuda popadaet i sam centr Galaktiki Sgr A*. Rezul'taty obrabotki pozvolyayut predpolozhit', chto svetit imenno tochechnyi istochnik. Odnako zametim, chto vse-taki dostovernost' 3.7 standartnyh otklonenii - eto ochen' malo. (Sm. nizhe o rezul'tate komandy CANGAROO-II). astro-ph/0403451 Sverhnovaya, svyazannaya s rentgenovskoi vspyshkoi 031203 (A supernova associated with X-ray flash 031203) Authors: B. Thomsen et al. Comments: 5 pages, 2 figures, submitted to A&A Avtory polagayut, chto nashli primer associacii rentgenovskoi vspyshki (X-ray flash) i sverhnovoi. Rentgenovskie vspyshki po vsei vidimosti yavlyayutsya "mladshimi brat'yami" gamma-vspleskov. V etoi rabote rech' idet o vspyshke GRB 031203, proizoshedshei v galaktike s krasnym smesheniem z=0.1055 (eto dovol'no blizko po merkam gamma-vspleskov). Avtory obnaruzhili pik izlucheniya cherez 10-33 dnya posle vspyshki. Oni interpretiruyu eto kak sverhnovuyu (vozmozhno, gipernovuyu), otmechaya shodstvo so sverhnovoi SN1998bw (kotoruyu, v svoyu ochered', svyazyvayut s gamma-vspleskom). astro-ph/0403453 Otkrytie millisekundnogo radiopul'sara v ochen' ekscentrichnoi dvoinoi sisteme (GMRT Discovery of A Millisecond Pulsar in a Very Eccentric Binary System) Authors: Paulo C. Freire et al. Comments: 12 pages (referee format), 3 figures, accepted for publication in Astrophysical Journal Letters Otkryt dvoinoi millisekundnyi radiopul'sar v sharovom skoplenii NGC 1851. Vazhnoi osobennost'yu sistemy yavlyaetsya ee bol'shoi ekscentrisitet - 0.89. Sovetuem prochest' i obratit' vnimanie na ideyu avtorov o tom, chto kompan'onom pul'sara mozhet byt' chernaya dyra! astro-ph/0403481 Obzor neba v zhestkom rentgene s pomosh'yu pribora SIGMA na bortu observatorii GRANAT (Hard X-ray sky survey with the SIGMA telescope aboard GRANAT observatory) Authors: M.G.Revnivtsev et al. Comments: 6 pages, 5 figures. Accepted for publication in Astronomy Letters Rossiiskii sputnik GRANAT byl zapushen v konce 1989 goda i prorabotal na orbite okolo 8 let. Na sputnike bylo ustanovleno neskol'ko priborov. V tom chisle i SIGMA. Eto teleskop s kodiruyushei maskoi, pozvolyayushii (togda vpervye!) poluchat' izobrazheniya s uglovyh razresheniem v chetvert' gradusa v ochen' zhestkom rentgenovskom diapazone (ot 35 do 1300 keV). Za 8 let raboty SIGMA otsnyala okolo chetverti neba. Osobenno tshatel'no nablyudalas' oblast' galakticheskogo centra. Na etom risunke pokazano, kakaya chast' neba byla pokryta navedeniyami SIGMA. Otmechena tol'ko samye yarkie istochniki. Na vtorom risunke privedena karta oblasti centra Galaktiki. Diskussiya po kosmicheskim lucham sverhvysokih energii Poyavilos' srazu neskol'ko korotkih zametok po kosmicheskim lucham, gde avtory diskutiruyut miniobzor astro-ph/0403489 Svoistva neitronnyh zvezd (Properties of neutron stars) Authors: M. H. van Kerkwijk (Univ. of Toronto) Comments: 12 pages, 2 figures U neitronnyh zvezd dostatochno mnogo raznyh svoistv. V etoi stat'e avtor obrashaet osnovnoe vnimanie na ih maksimal'nye massy i radiusy. astro-ph/0403503 Kommentarii k stat'e "Strannoe veshestvo v kachestve kosmicheskih luchei za predelom Greizena-Zacepina-Kuz'mina" (Comment on ``Strangelets as Cosmic Rays beyond the Greisen-Zatsepin-Cuzmin Cutoff'') Authors: Shmuel Balberg Comments: 2 pages, slightly extended version of journal paper Pervaya diskussiya nachalas' so stat'i Madsena i Larsona, v kotoroi oni predlozhili (v nekotorom smysle sleduya linii, nachatoi izvestnoi stat'ei Vittena 1984 g.), chto kosmicheskie luchi sverhvysokih energii yavlyayutsya "kapel'kami" (ili luchshe "strapel'kami"? - Strangelets) strannogo veshestva. V svoem kommentarii Balberg daet ocenku, soglasno kotoroi, esli ves' potok kosmicheskih luchei sverhvysokih energii ob'yasnyat' kvarkovym veshestvom, to togda kvarkovyh zvezd dolzhno byt' stol'ko, chto ne ostanetsya mesta dlya obychnyh neitronnyh (adronnyh) zvezd. Delo v tom, chto v principe, popav v normal'nuyu zvezdu, kapel'ka budet dovol'no bystro prevrashat' ee v kvarkovuyu. Po mneniyu Balberga eto maloveroyatno, t.e. neverna posylka o tom, chto vse kosmicheskie luchi sverhvysokih energii - eto kapel'ki strannoi materii. astro-ph/0403515 Otvet na kommentarii k "Strannoe veshestvo v kachestve kosmicheskih luchei za predelom Greizena-Zacepina-Kuz'mina" (Reply to Comment on Strangelets as Cosmic Rays beyond the Greisen-Zatsepin-Kuzmin Cutoff) Authors: Jes Madsen Comments: Phys.Rev.Lett. 92 (2004) 119002 Otvet Madsena na izlozhennye vyshe vozrazheniya zaklyuchaetsya v tom, chto kapel'ka strannogo veshestva pri stolknovenii so zvezdoi budet razrushat'sya (rech' idet, konechno, o stolknovenii s protonami). Otmetim, chto Balberg upominaet o tom, chto mehanizm razrusheniya kapli ploho izvesten, a potomu, vidimo, avtory dolzhny soglasit'sya, chto poka prosto nedostatochno dannyh dlya togo, chtoby otvergnut' gipotezu Madsena. astro-ph/0403517 Otvet na "Obrezaniya i penya: kommentarii na "Skuchivanie kosmicheskih luchei sverhvysokih energii i ih istochniki"" (Reply to ``Cuts and penalties: comment on he clustering of ultra-high energy cosmic rays and their sources' '') Authors: N.W. Evans et al. Comments: 2 pages (revtex4), 4 figures; response to astro-ph/0301336, to appear in Phys. Rev D Tret'ya stat'ya otnositsya sovsem k drugoi diskussii. Zdes' rech' idet o tom, kakie astrofizicheskie istochniki mogut yavlyat'sya "fabrikami" chastic kosmicheskih luchei sverhvysokih energii. Vazhnym metodom dlya proyasneniya etogo voprosa yavlyayutsya poiski grupp sobytii, kotorye mogli by prihodit' ot odnogo istochnika. Po etomu voprosu bylo dovol'no mnogo statei (ssylki legko naiti uzhe v etoi rabote). Kak tol'ko naideny (esli vy v nih verite) takie klastery sobytii, to mozhno smotret' kakie interesnye istochniki tam est'. Evans s soavtorami otstaivayut tochku zreniya o tom, chto lacertidy ne yavlyayutsya istochnikami. V dannoi rabote oni polemiziruyut so stat'ei Tinyakova i Tkachenko. Budem zhdat' razvitiya diskussii :) astro-ph/0403543 Temnoe barionnoe galo ne mozhet sostoyat' iz staryh belyh karlikov (Dark halo baryons not in ancient halo white dwarfs) Authors: M. Creze et al. Comments: 10 pages, 6 figures, 4 pages, submit to Astron. Astroph. Rezul'taty eksperimentov MACHO (po mikrolinzirovaniyu) pozvolyayut utverzhdat', chto chislo gravitacionnyh linz ne mozhet ob'yasnit' vse kolichestvo nevidimyh barionov. No eto tol'ko vyvod, a v stat'e podrobno rassmotreno kak on byl poluchen. astro-ph/0403553 PSR J1829+2456: relyativistskii dvoinoi pul'sar (PSR J1829+2456: a relativistic binary pulsar) Authors: D. J. Champion et al. Comments: Accepted MNRAS, 5 pages, 3 figures Korotko: otkryta eshe odna sistema radiopul'sar + neitronnaya zvezda. V otlichii ot nashumevshego "istinno dvoinogo radiopul'sara" - sistemy, gde obe neitronnye zvezdy dayut impul'sy - novaya sistema soderzhit lish' odin aktivnyi ob'ekt (hotya, kto znaet, vozmozhno v budushem udastsya chto-to eshe razglyadet'). Eto sed'maya takaya sistema. Sistema byla otkryta po dannym teleskopa v Aresibo. Nablyudeniya provodilis' azh v 1999 g., no obrabotka byla zakonchena lish' nedavno. Krome togo, v 2003 g. na toi zhe apparature provodilis' povtornye nablyudeniya, podtverdivshie fakt otkrytiya. Zatem provodilis' dopolnitel'nye nablyudeniya dlya opredeleniya parametrov dvoinoi. Pul'sar imeet period okolo 41 millisekundy. Period dvoinoi - 28 chasov. Ekscentrisitet - 0.14 Takaya sistema sol'etsya za schet izlucheniya gravvoln lish' cherez 60 milliardov let, tak chto novoe otkrytie ne okazalo vliyaniya na raschety tempa registracii gravitacionno-volnovyh vspleskov. Polozhenie pul'sara na nebe ukazyvaet, chto on mozhet prinadlezhat' nashemu lyubimomu Poyasu Gulda. Massa pul'sara ne bolee 1.38 massy solnca, massa kompan'ona - primerno mezhdu 1.22 i 1.38 (funkciya mass, komu interesno, 0.294). astro-ph/0403592 Registraciya sub-TeVnogo gamma-izlucheniya ot galakticheskogo centra na ustanovke CANGAROO-II (Detection of Sub-TeV Gamma-Rays from the Galactic Center Direction by CANGAROO-II) Authors: K. Tsuchiya, CANGAROO-II collaboration Comments: 13 pages, 3 figures, aastex.cls, accepted by ApJ Letters Vyshe my napisali o registracii na ustanovke VERITAS TeVnyh fotonov ot napravleniya na galakticheskii centr, a vot analogichnyi rezul'tat, poluchennyi komandoi CANGAROO. !!! astro-ph/0403597 Giperbolicheskaya vselennaya s konicheskoi [rogopodobnoi] topologiei i anizotropiya relikta (Hyperbolic Universes with a Horned Topology and the CMB Anisotropy) Authors: Ralf Aurich et ls. Comments: 26 pages, 23 figures Eshe odna ideya v kotoroi poluchennye sputnikom WMAP dannye po anizotropii relikta interpretiruyutsya v ramkah modeli so slozhnoi topologiei. Tol'ko v etot raz topologiya okazalas' konicheskoi, a krivizna Vselennoi - o otricatel'noi. Ochen' interesno! (Rekomenduem prochitat' i postaraemsya napisat' podrobnee.) astro-ph/0403710 O mehanizme obrazovaniya malomassivnyh kompaktnyh ob'ektov (On the mechanism of low-mass compact object formation) Authors: S.B.Popov Comments: 4 pages Rech' idet o neitronnyh ili kvarkovyh zvezdah. Vse tochno izvestnye massy etih ob'ektov (izmerennye v dvoinyh pul'sarah) lezhat v intervale ot 1.44 Mo do 1.25 Mo (prichem poslednyaya cifra poyavilas' tol'ko v 2004 godu, a do etogo figurirovala 1.35 Mo). Etot interval primerno sootvetstvuet vozmozhnomu intervalu mass yader massivnyh predsverhnovyh. A kak poluchit' neitronnuyu zvezdu s massoi 1 Mo ili nizhe? Predpolozhenie, vyskazannoe v dannoi stat'e, - fragmentaciya, prichem bol'she, chem na dve chasti, s posleduyushim vybrosom odnogo ili neskol'kih chastei v rezul'tate dinamicheskogo vzaimodeistviya. (Kazhetsya, eto pervyi sluchai, kogda odin iz avtorov dannyh obzorov, kommentiruet stat'yu drugogo.) My budem starat'sya hotya by perechislit' interesnye (dlya shirokoi publiki) stat'i, poyavivshiesya v razdele physics (vklyuchaya cross-listing). physics/0403089 V chem vopros? (What is a Question?) Authors: Kevin H. Knuth Comments: 16 pages, 6 figures, In: C. Williams (ed.) Bayesian Inference and Maximum Entropy Methods in Science and Engineering, Moscow ID 2002, AIP Conference Proceedings vol. 659, American Institute of Physics, Melville NY, pp. 227-242 My nemnogo vol'no pereveli nazvanie stat'i. Avtor pytaetsya v ramkah nekotoroi formalizovannoi modeli otvetit' na vopros "chto takoe vopros?", "naskol'ko vopros soderzhit v sebe otvet?" ... q-bio.PE/0403023 Al'truizm mozhet yavlyat'sya rezul'tatom otbora (Altruism may arise from individual selection) Authors: Angel Sanchez, Jose A. Cuesta Lish' al'truisty v zlate brodyat, moi muravei ( Gunickii) Pochemu u lyudei (ne vseh, k sozhaleniyu) est' al'truisticheskie naklonnosti? Avtory dayut svoi otvet v ramkah igrovoi modeli. physics/0403112 Duel': struny protiv petel' (The Duel: Strings versus Loops) Authors: Ruediger Vaas Comments: 10 pages, Extended version from: Ruediger Vaas: Das Duell: Strings gegen Schleifen. Published in: bild der wissenschaft (2004), no. 4, pp. 44-49. - Translated by Martin Bojowald and Amitabha Sen. - 10 pages, including 1 table and references Kak ne ochen' shiroko izvestno, teoriya strun ne yavlyaetsya edinstvennym igrokom na pole. Est' eshe petlevaya kvantovaya gravitaciya. V proshlom godu v Potsdame proshla "konferenciya-disput" mezhdu predstavitelyami etih dvuh napravlenii. Dannaya stat'ya yavlyaetsya obzorom ee itogov. physics/0403115 Ot "ne neverno" k (mozhet byt') verno (From "Not Wrong" to (Maybe) Right) Authors: Frank Wilczek Comments: 3 pages, This is, in essence, a solicited "Turning Points" feature written for Nature. It appeared, in a slightly abbreviated form, in the March 18 issue, Nature vol. 428 p. 261 Vzglyad izvestnogo uchenogo na to, kak delaetsya "nastoyashaya nauka" (na chastnyh primerah). Vernut'sya k nachalu stranicy

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