... We present the results of ATCA HI line and 20-cm radio continuum observations of the galaxy Quartet NGC 6845. The HI emission extends over all four galaxies but can only be associated clearly with the two spiral galaxies, NGC 6845A and B, which show signs of strong tidal interaction. We derive a total HI mass of 1.8 x 10 10 Msun, most of which is associated with NGC 6845A, the largest galaxy of the group. ... Figure 2: A new galaxy in the NGC6845 galaxy group. ...

... Астронет | ... Переменные Звезды | ... Микролинзирование . ... На протяжении последних нескольких лет в рамках проекта MACHO проводятся наблюдения микролинзирования звезд Большого Магелланова Облака - спутника нашей Галактики. Эффект микролинзирования заключается в гравитационной фокусировке света звезды массивным объектом, находящимся на луче зрения между звездой и наблюдателем. ... Согласно некоторым гипотезам, линзами могут являться реликтовые черные дыры или "нейтралинные звезды". ...

... Field of interest: data analysis and interpretation of X-ray observations of BHC and NS systems, astrophysics of compact objects and related phenomena: X-ray , optical and radio observations , shocks and stellar winds, emission mechanism, the spectral and timing analysis of the X-ray emission from microquasars ( signature of accreting BH), atoll- and Z-sources ( signature of accreting NS), modeling of INTEGRAL images % . ...

True Color Image Gallery: Galactic SNR | Magellanic Cloud SNR . ... Distance: 50kpc(distance to LMC, Westerlund(1990) ) . ... Radio Images Page . PDF version of this page : 1 column per page , 2 columns per page . ... Exposure uf . ... Exposure uf Exposure time of unfiltered event file . Exposure f Exposure time of filtered event file . ... Event 2 FITS File . ... AUX file . ... 0.3 - 2.1 . ... see fit detail page for more about the fit. see chandra spectrum page for region used. ...

M. ( / DIAS, Ireland), A. (ISDC, Switzerland) 1 - Key Question Only 3 binary systems regularly observed in TeV: PSR B1259-63 (young pulsar +Be star, P=3.4 y) LSI +61 303 (comp. source + Be star, P=26.42 d) LS 5039 (comp. source + O star, P=3.9 d) Origin of the high-energy emission? ... 2006; Neronov &Chernyakova 2007 4 3.4 years orbital period. e~0.87 Correlated variability with a sharp rise ( "two bumps structure" ) is seen in radio, X-ray (and TeV?) bands. ...

... Аскона Compact New 90x200. ... Симпатичая кофточка с округлым вырезом горловины и длинными рукавами. ... Цвет: Черный . ... Размер RU: 46 . ... Платье высокого качества из 100% полиэстера, нежное и легкое, обладает отличной воздухопроницаемостью и практически не мнется, не теряет форму и не статичное. ... Размер BRAND: 3 года (98 см) . Размер BRAND: 4 года (104 см) . Размер BRAND: 5 лет (110 см) . Размер BRAND: 6 лет (116 см) . Размер BRAND: 7 лет (122 см) . Цвет: бежевый . ...

... Астрофорум - астрономический портал ? ... Астрономическое оборудование и аксессуары (Модераторы: zlyden , Denk36 ) ? Celestron FS 114 EQ Compact. Качество изображения. предыдущая тема следующая тема . ... Ответ #20 : 23.07.2005 [23:37:16] ? ... Я вот присмотрел Celestron X-cel 8 мм или 5 мм. ... По окулярам я еще подумаю, хотя я полностью согласен, что телескоп то я поменяю, а вот окуляры высокого качества останутся. ... Ответ #23 : 07.06.2013 [10:57:43] ? ... Качество изображения. ...

. A gamma-ray pulsar is a compact neutron star that accelerates charged particles to relativistic speeds in its extremely strong magnetic field. This process produces gamma radiation (violet) far above the surface of the compact remains of the star, while radio waves (green) are emitted over the magnetic poles in the form of a cone. The rotation sweeps the emission regions across the terrestrial line of sight, making the pulsar light up periodically in the sky. б© NASA/Fermi/Cruz de Wilde

... In this paper we present the results of detailed B, V, R, I, and H study of the isolated nearby blue compact dwarf (BCD) galaxy NGC6789. Judging from the literature the observed galaxy has not been resolved into stars up to now. ... The distance of the galaxy, estimated from the tip of the red giant branch (TRGB) is 2.1 Mpc which places NGC6789 close to the Local Group. ... Key words: nearby galaxies: dwarf galaxies (NGC 6789): distance moduli: star content . ... Distance. ...

... 2) Physics Department, University of Puerto Rico at Rio Piedras, P.O. Box 23343, San Juan, Puerto Rico 00931 . ... We report the density structure of the ultracompact HII regions G35.20-1.74, G9.62+0.19-E, and G75.78+0.34-H2O. The density profiles are derived from radio continuum emission at wavelengths from 6 to 0.3cm. In the case of G35.20-1.74, a cometary UC HII region with a core and a tail, the spectrum of the core varies as Snu~nu^(0.6), implying that the density structure is ne~r^(-2). ...

... As a result of the BTA spectroscopy of a faint optical source (R=23), earlier identified at the BTA with a compact ( RC J0311+0507 from the sample of objects with ultra-steep radio spectra (RATAN-600), a radio galaxy with a strong narrow emission line, the most likely identification of which is the Lyman-alpha hydrogen at redshift of z=4.514. This is the second radio galaxy, discovered at a redshift of more than 4.5 - a real candidate for the most powerful radio objects of the Early Universe. ...

... Электронная библиотека на CD Гидроаэромеханика РХД 2002 г. ( есть ) . ... Математическая физика РХД 2001 г. ( есть ) . ... РХД 2001 г. Электронная библиотека на CD Небесная механика РХД 2002 г. Электронная библиотека на CD Обыкновенные дифференциальные уравнения. ... Электронная библиотека на CD Теория относительности и гравитация РХД 2002 г. Электронная библиотека студента. ... РХД 2001 г. Электронная библиотека. ... Том 1 , Том 2 , РХД 2003 г. Электронная библиотека. ... РХД 2003 г. (4 new) . ...

... Authors: Remco C. E. van den Bosch et al. arxiv:1211.2656 Эмиссионные линии в жестком рентгене от распада Ti-44 в остатке сверхновой 1987A (Hard X-ray emission lines from the decay of Ti-44 in the remnant of supernova 1987A) . ... Authors: Ian A. Crawford . ... Authors: Jack O. Burns et al. arxiv:1211.0310 Большой обзорный телескоп: коллаборация по изучению темной энергии (Large Synoptic Survey Telescope: Dark Energy Science Collaboration) . Authors: LSST Dark Energy Science Collaboration . ...

IAU Col loquium 164: Radio Emission from Galactic and Extragalactic Compact Sources ASP Conference Series, Vol. ... 38 7 9 S7: 13 : uxes on corresponding wave- For the RATAN-600 radio telescope the antenna gain depends upon source declination (i. e. elevation above the horizon) as well as upon wavelength, and its behavior was determined by measuring antenna temperatures at all wavelengths of sources of known ux density spanning a wide range of declination (see Table above). ...

We present radio interferometric observations of the Algol-type binary system V505 Sagitarii made with the ATNF Compact Array at 6 cm and 3.6 cm over one orbital cycle (1.18 days). We obtained a strong detection of the source (1.5 mJy at 6 cm and 1.4 mJy at 3.6 cm). The radio flux level shows a clear modulation with evidence of eclipses of the emission region at both conjunctions of the binary which may indicate the existence of an intra-binary region of activity. ...

... arXiv.org . astro-ph . ... We fit the near-infrared to radio spectral energy distributions of 30 luminous and ultra-luminous infrared galaxies with pure starburst models or models that include both starburst and AGN components to determine important physical parameters for this population of objects. In particular we constrain the optical depth towards the luminosity source, the star formation rate, the star formation efficiency and the AGN fraction. ...

... This image also shows the famous Cygnus X-1 system. ... These images were processed by incorporating Ha, SII, and RGB data, taken over several nights during May of 2007. ... 5/4/2007 through 5/9/2007 . ... The RGB was processed traditionally, and incorporated into the Ha/sG/SII image in two steps: The main RGB nebulosity was incorporated at a fairly low opacity, while the RGB stars were incorporated in at 100%, in "color" blend mode. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

. Cosmology . Very Early Universe . Cosmic Microwave Background Anisotropy . Dark Matter Models . Large Scale Structure . High Energy Astrophysics . Active Galactic Nuclei . Astrophysics of Compact Objects . Accretion Disks . Scientific Staff:

Astronotes Armagh Planetarium's Stellar Blog! ... Comets and Asteroids . ... Image credit:ESO/J.Emerson/VISTA. ... However others are less pessimistic and it has even been claimed that the mysterious ?Wow! signal? received in 1977 originated from the direction M55.б  Sadly, this still unexplained pulse of radio energy originated from a location rather to the northwest of M55 so I doubt if the source was this cluster (if indeed the signal was genuinely of extraterrestrial origin). ... Mysterious Wow! ...

... An interactive IRAF task for the analysis of Extreme Ultraviolet Explorer ( EUVE ) emission line spectra is presented. The line flux in extracted spectra may be measured by multiple techniques, including fitting individual lines. ... To aid in identifying lines, the positions of known lines may be marked on the spectrum during the fitting process. Also, model EUVE spectra may be constructed and overlaid using plasma emissivities and source emission measures supplied by the user. ...