... A: Because they have an event horizon . ... X-ray astronomers using the space-based Chandra Observatory now believe they have direct for event horizons - therefore black holes - in binary star systems which can be detected in x-ray light. ... But if it is indeed a black hole with a defining event horizon, then the x-ray hot material approaches the speed of light as it swirls past the surface of no return and is lost from view. ... Publications with keywords: black hole - x-ray binary - neutron star ...

... Abubekerov M.K., Lipunov V.M. "The Lower Temperature Limits Of Accretors" Astronomy Reports, 2003, Vol. 47, Issue 8, pp.679-684. ... Abubekerov M.K., Antokhina E.A., Cherepashchuk A.M. "The Masses of X-ray Pulsars in Binary systems with OB Supergiants" Astronomy Reports, 2004, Vol. ... Abubekerov M.K., Antokhina E.A., Cherepashchuk A.M., Shimanskii V.V. "The Mass of the Compact Object in the Low-Mass X-ray Binary 2S 0921-630" Astronomy Reports Astronomy Reports, 2006, Vol.50, Issue 7, pp.544-552. ...

ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Information & tools for observers . ... Australia Telescope Online Archive (ATOA) . ... ATCA | ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... The Australia Telescope National Facility Colloquium . ...

... 2001 January 19 . Black Holes Are Black . ... A: Because they have an event horizon . ... X-ray astronomers using the space-based Chandra Observatory now believe they have direct evidence for event horizons - therefore black holes - in binary star systems which can be detected in x-ray light. ... But if it is indeed a black hole with a defining event horizon, then the x-ray hot material approaches the speed of light as it swirls past the surface of no return and is lost from view. ... About APOD | ...

... 1) A Multiwavelength Study of Tadpole Galaxies in the Hubble Ultra Deep Field, Straughn, A., et al. (including S. Ravindranath), 2015, ApJ, 814, 97. 2) The Rate of Core Collapse Supernovae to Redshift 2.5 from CANDELS and CLASH Supernova Surveys, Strolger, L., et al. (including S. Ravindranath), 2015, ApJ, 813, 93. ... 18) "Resolved Galaxies in the Hubble Ultra Deep Field: Star Formation in Disks at High Redshift", Elmegreen, D.M., Elmegreen, B.G., Ravindranath, S., Coe, D.A., 2007, ApJ, 658, 763. ...

... 2015: . Explanation of the Origin of Ultraluminous X-Ray Sources . Using optical spectroscopy, we revealed the origin of unusual objects: ultraluminous X-ray sources in other galaxies, which radiate in the X-ray range thousands times stronger than the black holes in our Galaxy. ... Detection of Radio Transients and Variable Radio Sources using the Archive Data of the Cold Surveys . ... O.Zhelenkova ), E.Majorova, A.Temirova . ... E.Majorova, O.Zhelenkova. ... Archive . ...

Next: Binary Radiopulsars with Black Up: Black Holes in Binaries Previous: Black Holes in Binaries . Two different types of stellar BH formation exist: (1) direct core collapse   of a massive star and (2) AIC of a NS. A BH of the first type presumably will have a mass comparable to that of the collapsing star and can be born both from a single star and in a binary system. ... Next: Binary Radiopulsars with Black Up: Black Holes in Binaries Previous: Black Holes in Binaries Mike E. Prokhorov . ...

... Elena Seifina and Lev Titarchuk "On the nature of the compact object in SS433: observational evidence of X-ray photon index saturation" 2010, Astrophysical. ... A.M. Cherepashchuk, R.A. Sunyaev, E.V. Seifina, E.A. Antokhina, D.I. Kosenko, S.V. Molkov, N.I. Shakura, K.A. Postnov, A.N. Timokhin, I.E. Panchenko "INTEGRAL Observations of SS433: Analysis of Precessional and Orbital X-ray Periodicities" 2007, 6th INTEGRAL Workshop, Eds. S. Grebenev, R.A. Sunyaev, p.411 (astro-ph/0610235) . ...

Our publications in 2002 year Kniazev, A. Y.; Grebel, E. K.; Pustilnik, S. A.; Pramskij, A. G. American Astronomical Society, 201st AAS Meeting, #52.23; Bulletin of the American Astronomical Society, Vol. 34, p.1195 (12/2002) . ... N.; Pustilnik, S. A.; Kniazev, A. Y.; Elmegreen, B. G.; Larsen, S. S.; Alfaro, E. J.; Hodge, P. W.; Pramsky, A. G.; Richtler, T. Astronomy and Astrophysics, v.389, p.855-870 (07/2002) . ... 253-253 (02/2002) . ... 24P (01/2002) . ...

... Science . ... Science Users Information > Science and Technical Meetings > Conferences 1999 > bh99 . ... Observing with ESO Telescopes . ... Data Handling and Products . ... ESO Data . ... Science in Garching . ... ESO Headquarters, Garching bei MУМnchen, Germany . The aim of this workshop is to bring together astrophysicists working on the rather separate fields of stellar-mass and supermassive black holes, with emphasis on the formation, population, physics, and environments of black holes. ...

... Smithsonian Lead Scientist, SAO/Southampton Masters Program . ... Chandra Uncovers New Evidence For Event Horizons Surrounding Black Holes . ... XTE J1118+480: Chandra Pinpoints Edge Of Accretion Disk Around Black Hole . ... Astronomers Closing in on Black Holes . ... A Black Hole Greater Than 6 Msolar in the X-Ray Nova XTE J1118+480 . Complete and Simultaneous Spectral Observations of the Black Hole X-Ray Nova XTE J1118+480 . Aql X-1: Garcia etal 99, . ... Home" Home Page . ...

home education > resources . ... Resources . ... Astronomy Education Bibliography . ... Black Holes: An Introductory Resource List . ... http://hubblesite.org/explore_astronomy/black_holes/home.html . ... The Universe in the Classroom (The ASP's Newsletter on Teaching Astronomy) Issue on Black Holes by John Percy: . ... For a set of black hole information guides and demonstration activities from the ASP's and JPL's Night Sky Network, click on the link below and check the box on black holes: . ...

... Gilfanov, M. and Merloni, A. Observational Appearance of Black Holes in X-Ray Binaries and AGN . ... Accretion onto black holes powers most luminous compact sources in the Universe. ... Accretion onto supermassive black holes in AGN and stellar- and (possibly) intermediate mass black holes in X-ray binaries and ultra-luminous X-ray sources in star-forming galaxies can explain most, if not all, of the observed brightness of the cosmic X-ray background radiation. ...

... Over the first 4 years, its X-ray telescopes eROSITA and ART-XC will survey the whole sky with a record sensitivity in the 0.5-10 keV energy band. ... The goal of the second international Spectrum-RG conference is to discuss the different scientific topics addressed by the mission, synergies with surveys at other wavelengths, and requirements to follow-up observations.Contributed talks and poster presentations are invited on the topics related to the SRG science goals. ... Active galactic nuclei . ...

... Compact Binaries . ... Globular Clusters . ... Ultra-Compact binaries in globular clusters . ... It is known that UC X-ray binaries are more abundant in globular clusters compared to that found in Galactic fields (eg van der Sluys, Verbunt \ Pols 2005 and references therein). On the other hand no AM CVn systems have been found in globular clusters, while 20 are known in the Galactic field (for a review of AM CVn systems see Nelemans 2005). ...

Blackholes2 Forum Message . ... Holostars: Black Holes Without Event Horizons . ... Its name derives from the fact tht information is preserved in such a black hole, and must be a contraction of hologram and star. ... The exterior metrics and fields of the charged holostar are equal to the Reissner-Nordstroem black hole solution. ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Schedule IKI RAN Data Acquisition, Processing and Dissemination Center . SRC "Planeta" Data Acquisition, Processing and Dissemination Center . Sea Surface Temperature Adriatic Sea . Baltic Sea . Barents Sea . Black Sea . ... Composite Image of Cloudiness Russia . ... Regional Archive (only cloudless data) . ... Operative Regional Archive (all data for last 3 days) . ... NOAA Data on other Servers (about Russia) . For more information send a mail to: info@sputnik.infospace.ru . ...

... Research . ... A rare hybrid morphology radio galaxy . ... In this project we will be able to investigate the environmental effect on star formation and galaxy evolution in individual galaxies falling into the cluster through radio observations of active galactic nuclei (AGN). Current models of galaxy evolution regulate the star formation rates within the simulated galaxies by invoking radio-mode feedback from AGN. ... Julie.Banfield@anu.edu.au . ...

... 2000, ApJ, 537, L49 . ... F. Palla . Invited Talk at the IAU Symposium 200 "The formation of binary stars" eds. R.D. Mathieu and H. Zinnecker (ASP Conf. Ser.) in press . Optical follow-up of ROSAT discovered candidate members of the open cluster Coma Berenices . ... 2000, A , in press . ... 2000, ApJ, in press . ... 2000, ApJ, in press (Sept. ... 2000, ApJ Lett., in press . ... Click to examine publications from other years . ... Star Formation Group . ... Arcetri Home Page . ...

Benner, L.A.M., Ostro, S.J., Hudson, R.S., Rosema, K.D., Radar Observations of Asteroid 3908 Nyx (1980 PA) , Bull. ... 32, 1001, 2000. Black, G.J., Campbell, D.B. and Ostro, S.J., Icy Galilean Satellites: 70 cm Radar Results from Arecibo , Icarus, 151, 160, 2001. Burton, W.B., Braun, R. and Chengalur, J.N., Arecibo Imaging of Compact High-Velocity Clouds , Astron.Astrophys., ... 2000. ... Physical and Orbital Properties of Micrometeors Observed Using the 430 MHz Arecibo Observatory Radar, PhD. ...