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Comparison of Millimeter-wave and X-Ray Emission in Seyfert Galaxies

Monje, R. R. and Blain, A. W. and Phillips, T. G. (2011) Comparison of Millimeter-wave and X-Ray Emission in Seyfert Galaxies. Astrophysical Journal Supplement Series, 195 (2). Art. No. 23. ISSN 0067-0049. doi:10.1088/0067-0049/195/2/23.

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We compare the emission at multiple wavelengths of an extended Seyfert galaxy sample, including both types of Seyfert nuclei. We use the Caltech Submillimeter Observatory to observe the CO J = 2-1 transition line in a sample of 45 Seyfert galaxies and detect 35 of them. The galaxies are selected by their joint soft X-ray (0.1-2.4 keV) and far-infrared (λ = 60-100 μm) emission from the ROSAT/IRAS sample. Since the CO line widths (W_(CO)) reflect the orbital motion in the gravitational potential of the host galaxy, we study how the kinematics are affected by the central massive black hole (BH), using the X-ray luminosity. A significant correlation is found between the CO line width and hard (0.3-8 keV from Chandra and XMM-Newton) X-ray luminosity for both types of Seyfert nuclei. Assuming an Eddington accretion to estimate the BH mass (M_(BH)) from the X-ray luminosity, the W_(CO)-L_X) relation establishes a direct connection between the kinematics of the molecular gas of the host galaxy and the nuclear activity, and corroborates the previous studies that show that the CO is a good surrogate for the bulge mass. We also find a tight correlation between the (soft and hard) X-ray and the CO luminosities for both Seyfert types. These results indicate a direct relation between the molecular gas (i.e., star formation activity) of the host galaxy and the nuclear activity. To establish a clear causal connection between molecular gas and the fueling of nuclear activity, high-resolution maps (<100 pc) of the CO emission of our sample will be required and provided in a forthcoming Atacama Large Millimeter Array observation.

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Blain, A. W.0000-0001-7489-5167
Additional Information:© 2011 The American Astronomical Society. Received 2010 January 7; accepted 2011 June 20; published 2011 August 4. The authors thank the CSO staff for their support during observations. We thank the anonymous referees for valuable suggestions that improved the manuscript. We are grateful for interesting discussions with Nick Scoville, Martin Emprechtinger, and Tom Bell. The CSO is founded by the National Science Foundation under the contract AST-08388361. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Facilities: CSO, ROSAT, IRAS, CXO
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Subject Keywords:galaxies: active; galaxies: ISM; galaxies: nuclei; galaxies: Seyfert
Issue or Number:2
Classification Code:PACS: 98.54.Cm; 98.62.Dm; 98.70.Qy; 98.62.Mw; 98.62.Js; 98.62.Ck
Record Number:CaltechAUTHORS:20110929-105852804
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Official Citation:Comparison of Millimeter-wave and X-Ray Emission in Seyfert Galaxies R. R. Monje et al. 2011 ApJS 195 23
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:25491
Deposited By: Ruth Sustaita
Deposited On:29 Sep 2011 21:06
Last Modified:09 Nov 2021 16:33

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