Chary, Ranga-Ram (2007) Arp 102B: An ADAF and a Torus? In: The central engine of active galactic nuclei. ASP Conference Series (373). Astronomical Society of the Pacific , San Francisco, pp. 443-446. ISBN 978-1-58381-307-2 http://resolver.caltech.edu/CaltechAUTHORS:20100820-110343321
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Arp 102B is a nearby radio galaxy which displays the presence of double-peaked Balmer emission lines. Sub-arcsec Keck mid-infrared imaging and Spitzer spectroscopy reveal a spatially compact mid-infrared source which displays tentative evidence for variability. The F_v ∝ ν^(−1.2) spectral energy distribution is suggestive of an advection-dominated accretion flow. The absence of dust features over the 5−40 μm range make it unlikely that thermal dust emission dominates the mid-infrared luminosity. We also detect the presence of molecular hydrogen in emission which is asymmetrically redshifted by ~500-1000 km/s from the systemic velocity of the galaxy. Since the forbidden, low-ionization lines in this galaxy are at the systemic velocity, we suggest that the molecular hydrogen emission arises from a rotating molecular gas structure surrounding the nuclear black hole at a distance of ~1 pc.
|Item Type:||Book Section|
|Additional Information:||© 2007 Astronomical Society of the Pacific. I would like to acknowledge my collaborators, Luis Ho, Harlan Devore, Eric Becklin and Nick Scoville for their assistance with different aspects of the observations. I would also like to acknowledge the organizers for a very enjoyable and productive meeting. These observations were partly a component of the Spitzer Teacher’s Education program.|
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|Deposited By:||Tony Diaz|
|Deposited On:||20 Aug 2010 20:00|
|Last Modified:||26 Dec 2012 12:20|
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