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The intriguing case of Was 49b

Published online by Cambridge University Press:  29 March 2021

Henrique R. Schmitt Open the ORCID record for Henrique R. Schmitt [Opens in a new window] ,
Nathan J. Secrest ,
Laura Blecha ,
Barry Rothberg Open the ORCID record for Barry Rothberg [Opens in a new window]  and
Jacqueline Fischer
Henrique R. Schmitt
Affiliation:
Remote Sensing Division, Naval Reseearch Laboratory, 4555 Overlook Ave. NW, Washington DC-20375, USA email: [email protected]
Nathan J. Secrest
Affiliation:
U.S. Naval Observatory, 3450 Massachusetts Ave. NW, Washington, DC20392, USA
Laura Blecha
Affiliation:
Dept. of Physics, University of Florida, P.O. Box 118440, Gainesville, FL32611, USA
Barry Rothberg
Affiliation:
LBT Observatory, University of Arizona, 933 N. Cherry Ave., Tucson AZ85721, USA Dept. of Physcis and Astronomy, George Mason University, MS3F3, 4400 University Drive, Fairfax, VA22030, USA
Jacqueline Fischer
Affiliation:
Dept. of Physcis and Astronomy, George Mason University, MS3F3, 4400 University Drive, Fairfax, VA22030, USA
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Abstract

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We present results of a multiwavelength study of the isolated dual AGN system Was 49. Observations show that the dominant component in this interacting system, Was 49a, is a spiral galaxy, while Was 49b is hosted in a dwarf galaxy located at 8 kpc from the nucleus of Was 49a, at the edge of its disk. The intriguing fact about this system is the luminosity of their corresponding AGNs. While Was 49a hosts a low luminosity Seyfert 2 with Lbol˜1043 erg s–1, Was 49b has a Seyfert 2 with Lbol ˜ 1045 erg s–1, in the luminosity range of Quasars. Furthermore, estimates of the black hole and host galaxy masses of Was 49b indicate a black hole significantly more massive than one would expect from scaling relations. This result is in contrast with findings that the most luminous merger-triggered AGNs are found in major mergers and that minor mergers predominantly enhance AGN activity in the primary galaxy.

Keywords

galaxies: activegalaxies: bulgesgalaxies: dwarfgalaxies: interactionsgalaxies: nucleigalaxies: Seyfert
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S359: Galaxy Evolution and Feedback across Different Environments , March 2019 , pp. 153 - 157
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

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