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Arp 87
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A pair of galaxies, known collectively as Arp 87, is one of hundreds of interacting and merging galaxies known in our nearby Universe. Arp 87 was originally discovered and catalogued by astronomer Halton Arp in the 1970s. Arps Atlas of Peculiar Galaxies is a compilation of astronomical photograph...
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MC2 1635+119
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What has appeared as a mild-mannered elliptical galaxy in previous studies is revealing its wild side in new images taken with NASA's Hubble Space Telescope. The Hubble photos show shells of stars around a bright quasar, known as MC2 1635+119, which dominates the centre of the galaxy. The shells' p...
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3C 326 Radio Galaxy
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Title: Shocked Molecular Hydrogen in the 3C 326 Radio Galaxy System Authors: Patrick Ogle (1), Robert Antonucci (2), P. N. Appleton (3), David Whysong (4) ((1) SSC/Caltech, (2) UCSB, (3) NHSC/Caltech, (4) NRAO/VLA) The Spitzer spectrum of the giant FR II radio galaxy 3C 326 is dominated by very str...
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I Zwicky 18
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NASA's Hubble Space Telescope quashed the possibility that what was previously believed to be a toddler galaxy in the nearby universe may actually be considered an adult. Called I Zwicky 18, this galaxy has a youthful appearance that resembles galaxies typically found only in the early universe....
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XMMU J1229397+075333
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Title: An X-ray emitting black hole in a globular cluster Authors: Thomas J. Maccarone (Southampton), Gilles Bergond (IAA/CAHA), Arunav Kundu (Michigan State), Katherine L. Rhode, John J. Salzer (Indiana), I Chun Shih, Stephen E. Zepf (Michigan State) We present optical and X-ray data for the f...
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1E 1207.9+3945
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Title: The 26 year-long X-ray light curve and the X-ray spectrum of the BL Lac Object 1E 1207.9+3945 in its brightest state Authors: A. Maselli, P. Giommi, M. Perri, R. Nesci, A. Tramacere, F. Massaro, M. Capalbi We studied the temporal and spectral evolution of the synchrotron emission from the hig...
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Supernova 2005ap
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Title: SN 2005AP: A MOST BRILLIANT EXPLOSION Authors: Robert M. Quimby, Greg Aldering, J. Craig Wheeler, Peter Höflich, Carl W. Akerlof, Eli S. Rykoff We present unfiltered photometric observations with ROTSE-III and optical spectroscopic follow-up with the HET and Keck of the most luminous su...
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ESO540-032
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Title: ESO540-032: a Transition-Type Dwarf in the Sculptor Group Authors: G. S. Da Costa, H. Jerjen, A. Bouchard A colour-magnitude diagram (CMD) based on HST/ACS data is presented for the Sculptor group dwarf galaxy ESO540-032. The CMD is dominated by an old red giant population but there is a sma...
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MG3 J225155+2217
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There is a gamma-ray lighthouse shining from the edge of our Universe. Astronomers have discovered it using ESAs orbiting gamma-ray observatory, Integral. Now, they must work hard to understand it. The object, known only by its catalogue name IGR J22517+2218, was discovered this year, but its n...
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SLACS J0737+3216
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A tiny galaxy, nearly halfway across the universe, the smallest in size and mass known to exist at that distance, has been identified by an international team of scientists led by two from the University of California, Santa Barbara. The scientists used data collected by NASA's Hubble Space Telesc...
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AEGIS
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Hundreds of images snapped by the Hubble Space Telescope have been woven together to create a rich tapestry of thousands of galaxies. Astronomers created the panoramic view as part of a five-year project called AEGIS (All-wavelength Extended Groth strip International Survey). Eight of the worl...
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SAURON Survey
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Title: Spiral Galaxies in the SAURON Survey Authors: Reynier F. Peletier (1), Katia Ganda (1), Jesus Falcon-Barroso (2), Roland Bacon (3), Michele Cappellari (4), Roger L. Davies (4), P. Tim de Zeeuw (5,6), Eric Emsellem (3), Davor Krajnovic (4), Harald Kuntschner (6), Richard M. McDermid (5), M...
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Tidal Dwarf Galaxies
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A new method to detect small, faint galaxies that spring up in the wake of violent galactic collisions has been devised by astronomers using the Spitzer Space Telescope. The method could shed light on how most of the galaxies near our own formed.
The vast majority of local galaxies are "dwarfs" –...
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Abell Cluster A586
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Title: Dark Energy-Dark Matter Interaction from the Abell Cluster A586 and violation of the Equivalence Principle Authors: Morgan Le Delliou (CFTC), O. Bertolami, F. Gil Pedro We find that the Abell Cluster A586 exhibits evidence of the interaction between dark matter and dark energy and argue t...
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NGC1399
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Title: The Black Hole Mass and Extreme Orbital Structure in NGC1399 Authors: Karl Gebhardt, Tod R. Lauer, Jason Pinkney, Ralf Bender, Douglas Richstone, Monique Aller, Gary Bower, Alan Dressler, Sandra Faber, Alexei Filippenko, Richard Green, Luis Ho, John Kormendy, Christos Siopis, Scott Tr...
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