Search for AGNs in Dwarf Galaxies in the the M81 Field with INTEGRAL Data

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Abstract

Using long-term INTEGRAL hard X-ray observations, we have put upper limits on the bolometric luminosity (Lbol@1041 erg s-1) of the nuclei of 72 nearby dwarf galaxies located in the M81 field. This has allowed us to constrain the fraction of galaxies in which the central black hole accretes matter at a rate above 0.1% of the critical one. Under simple assumptions about the distributions of black hole masses and accretion rates this fraction does not exceed 9%. Reliable estimates of the central black hole masses are required to obtain more stringent constraints on the fraction of AGNs.

About the authors

I. A. Mereminskiy

Space Research Institute, Russian Academy of Sciences

Email: i.a.mereminskiy@gmail.com
117997, Moscow, Russia

S. Yu. Sazonov

Space Research Institute, Russian Academy of Sciences

Email: i.a.mereminskiy@gmail.com
117997, Moscow, Russia

R. A. Krivonos

Space Research Institute, Russian Academy of Sciences

Email: i.a.mereminskiy@gmail.com
117997, Moscow, Russia

I. D. Karachentsev

Special Astrophysical Observatory, Russian Academy of Sciences

Author for correspondence.
Email: i.a.mereminskiy@gmail.com
369167, Nizhnii Arkhyz, Karachai-Cherkessian Republic, Russia

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