Stellar Properties of the Host Galaxy of an Ultraluminous X-ray Source in NGC 5252

Abstract

An ultraluminous X-ray source (ULX) in NGC 5252 has been known as a strong candidate for an off-nuclear intermediate-mass black hole. We present near-infrared imaging data of the ULX obtained with the William Herschel Telescope. Using this data we estimate a stellar mass associated with the ULX of $\approx 10^{7.9\pm 0.1}{M}_{\odot }$ , suggesting that it could be (the remnant of) a dwarf galaxy that is in the process of merging with NGC 5252. Based on a correlation between the mass of the central black hole (BH) and host galaxy, the ULX is powered by a $10^5{M}_{\odot }$ black hole. Alternatively, if the BH mass is $\approx 10^6{M}_{\odot }$ or larger, the host galaxy of the ULX must have been heavily stripped during the merger. The ULX $K_s$-band luminosity is two orders of magnitude smaller than that expected from an ordinary active galactic nucleus with the observed [O III] luminosity, which also suggests the ULX lacks a dusty torus. We discuss how these findings provide suggestive evidence that the ULX is hosting an intermediate-mass black hole.

To appear in MNRAS

References in corpus (15)

• A luminous quasar at a redshift of z = 7.085
• An Ultraluminous X-ray Source Powered by An Accreting Neutron Star
• An accreting pulsar with extreme properties drives an ultraluminous x-ray source in NGC 5907
• Discovery of coherent pulsations from the Ultraluminous X-ray Source NGC 7793 P13
• Observational evidence for intermediate-mass black holes
• A Supermassive Black Hole in an Ultracompact Dwarf Galaxy
• Reverberation Measurements of the Inner Radius of the Dust Torus in 17 Seyfert Galaxies
• The Black Hole Mass Scale of Classical and Pseudo Bulges in Active Galaxies
• X-ray constraints on the local supermassive black hole occupation fraction
• A 10,000-solar-mass black hole in the nucleus of a bulgeless dwarf galaxy
• Indecent Exposure in Seyfert 2 Galaxies: A Close Look
• Chandra Survey of Nearby Galaxies: A Significant Population of Candidate Central Black Holes in Late-type Galaxies
• A metal-poor ultra compact dwarf galaxy at a kiloparsec distance from the low-mass elliptical galaxy FCC47
• NGC5252: a pair of radio-emitting active galactic nuclei?
• Ionized Gas Kinematics around an Ultra-luminous X-ray Source in NGC 5252 : Additional Evidence for an Off-nuclear AGN

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• FROST-CLUSTERS -- III. Metallicity-dependent intermediate mass black hole formation by runaway collisions in dense star clusters