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Table · dataset · 2021

Compilation of black hole, bulge and stellar masses

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We present a multiwavelength study of the active galactic nucleus in the nearby (D=14.1Mpc) low-mass galaxy IC750, which has circumnuclear 22GHz water maser emission.

Description

The masers trace a nearly edge-on, warped disk ~0.2pc in diameter, coincident with the compact nuclear X-ray source that lies at the base of the ~kiloparsec-scale extended X-ray emission. The position-velocity structure of the maser emission indicates that the central black hole (BH) has a mass less than 1.4x105M{sun}.

Keplerian rotation curves fitted to these data yield enclosed masses between 4.1x104M{sun} and 1.4x105M{sun}, with a mode of 7.2x104M{sun}. Fitting the optical spectrum, we measure a nuclear stellar velocity dispersion {sigma }*=110.7_-13.4_^+12.1^km/s. From near-infrared photometry, we fit a bulge mass of (7.3{+/-}2.7)x108M{sun} and a stellar mass of 1.4x1010M{sun}.

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The mass upper limit of the intermediate-mass BH in IC750 falls roughly two orders of magnitude below the MBH-{sigma}* relation and roughly one order of magnitude below the MBH-MBulge and MBH-M* relations-larger than the relations' intrinsic scatters of 0.58{+/-}0.09dex, 0.69dex, and 0.65{+/-}0.09dex, respectively. These offsets could be due to larger scatter at the low-mass end of these relations. Alternatively, BH growth is intrinsically inefficient in galaxies with low bulge and/or stellar masses, which causes the BHs to be undermassive relative to their hosts, as predicted by some galaxy evolution simulations.

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Astronomical sciences 74%
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IVOA Registry (Virtual Observatory)ivo://cds.vizier/j/apj/897/11114 d agoJSON v1
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concepts[field].anzsrc:group:5101enrichment · IVOA Registrytaxonomy-embedding@1.1.0title+keywords+description (74%)
concepts[field].local:field:astronomymapping · IVOA Registryconnector:ivoa_registry@1.0.0
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