| Issue |
A&A
Volume 549, January 2013
|
|
|---|---|---|
| Article Number | A119 | |
| Number of page(s) | 14 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361/201220343 | |
| Published online | 09 January 2013 | |
Black-hole masses of type 1 AGN in the XMM-Newton bright serendipitous survey⋆,⋆⋆
1
INAF - Osservatorio Astronomico di Brera, via Brera 28,
20121
Milan,
Italy
e-mail: alessandro.caccianiga@brera.inaf.it
2
Dipartimento di Fisica, Universitá degli Studi di
Milano-Bicocca, Piazza Della
Scienza 3, 20126
Milano,
Italy
3
Instituto de Física de Cantabria (CSIC-UC),
Avenida de los Castros,
39005
Santander,
Spain
4
X-ray & Observational Astronomy Group, Department of
Physics and Astronomy, Leicester University, Leicester
LE1 7RH,
UK
Received: 6 September 2012
Accepted: 15 November 2012
Aims. We derive masses of the central supermassive black hole (SMBH) and accretion rates for 154 type 1 AGN belonging to a well-defined X-ray-selected sample, the XMM-Newton serendipitous sample (XBS).
Methods. We used the most recent “single-epoch” relations, based on Hβ and MgIIλ2798 Å emission lines, to derive the SMBH masses. We then used the bolometric luminosities, computed on the basis of an SED-fitting procedure, to calculate the accretion rates, both absolute and normalized to the Eddington luminosity (Eddington ratio).
Results. The selected AGNs cover a range of masses from 107 to 1010 M⊙ with a peak around 8 × 108 M⊙ and a range of accretion rates from 0.01 to ~50 M⊙/year (assuming an efficiency of 0.1), with a peak at ~1 M⊙/year. The values of Eddington ratio range from 0.001 to ~0.5 and peak at 0.1.
Key words: galaxies: active / galaxies: nuclei / X-rays: galaxies / surveys
Based on observations collected at the Telescopio Nazionale Galileo (TNG) and at the European Southern Observatory (ESO), La Silla, Chile and on observations obtained with XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and the USA (NASA).
Table 1 is available in electronic form at http://www.aanda.org
© ESO, 2013
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