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Date and Time of the Query: 2019-05-20 T20:14:56 PDT
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For refcode 2012ApJ...749..129G:
Retrieve 69 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
2012ApJ...749..129G A Chandra Survey of Supermassive Black Holes with Dynamical Mass Measurements Gultekin, Kayhan; Cackett, Edward M.; Miller, Jon M.; Di Matteo, Tiziana; Markoff, Sera; Richstone, Douglas O. Abstract. We present Chandra observations of 12 galaxies that contain supermassive black holes (SMBHs) with dynamical mass measurements. Each galaxy was observed for 30 ks and resulted in a total of 68 point-source detections in the target galaxies including SMBH sources, ultraluminous X-ray sources (ULXs), and extragalactic X-ray binaries. Based on our fits of the X-ray spectra, we report fluxes, luminosities, Eddington ratios, and slope of the power-law spectrum. Normalized to the Eddington luminosity, the 2-10 keV band X-ray luminosities of the SMBH sources range from 10^-8^ to 10^-6^, and the power-law slopes are centered at ~2 with a slight trend toward steeper (softer) slopes at smaller Eddington fractions, implying a change in the physical processes responsible for their emission at low accretion rates. We find 20 ULX candidates, of which 6 are likely (>90% chance) to be true ULXs. The most promising ULX candidate has an isotropic luminosity in the 0.3-10 keV band of 1.0^+0.6^_- 0.3_ x 10^40^ erg s^-1^. Key words: accretion, accretion disks, black hole physics, galaxies: general, galaxies: nuclei, X-rays: galaxies, X-rays: general
Retrieve 69 NED objects in this reference.
Please click here for ADS abstract

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