2022ApJ...927...67S -
Astrophys. J., 927, 67-67 (2022/March-1)
The (Black Hole Mass)-(Spheroid Stellar Density) Relations: M BH-µ (and M BH-Σ) and M BH-ρ.
SAHU N., GRAHAM A.W. and DAVIS B.L.
Abstract (from CDS):
This paper is the fourth in a series presenting (galaxy morphology, and thus galaxy formation)-dependent black hole (BH) mass, M BH, scaling relations. We have used a sample of 119 galaxies with directly measured M BH and host spheroid parameters obtained from multicomponent decomposition of, primarily, 3.6 µm Spitzer images. Here, we investigate the correlations between M BH and the projected (apparent) luminosity density µ, the projected stellar mass density Σ, and the de-projected (internal) stellar mass density ρ, for various spheroid radii. We discover the predicted M BH-µ 0,sph relation and present the first M BH-µ _ e,sph_ and M BH-ρ e,int,sph diagrams displaying slightly different (possibly curved) trends for early- and late-type galaxies (ETGs and LTGs, respectively) and an offset between ETGs with (fast-rotators, ES/S0) and without (slow-rotators, E) a disk. The scatter about various M BH-<Σ> R,sph (and <ρ> _ r,sph_) relations is shown to systematically decrease as the enclosing aperture (and volume) increases, dropping from 0.69 dex when using the spheroid "compactness," <Σ> 1kpc,sph, to 0.59 dex when using <Σ> 5kpc,sph. We also reveal that M BH correlates with the internal density, ρ soi,sph, at the BH's sphere-of-influence radius, such that core-Sersic (high Sersic index, n) and (low-n) Sersic galaxies define different relations with total rms scatters 0.21 dex and 0.77 dex, respectively. The M BH-<ρ> soi,sph relations will help with direct estimation of tidal disruption event rates, binary BH lifetimes, and together with other BH scaling relations, improve the characteristic strain estimates for long-wavelength gravitational waves pursued with pulsar timing arrays and space-based interferometers.
Abstract Copyright:
© 2022. The Author(s). Published by the American Astronomical Society.
Journal keyword(s):
Early-type galaxies - Galaxy evolution - Late-type galaxies - Scaling relations - Supermassive black holes - Galaxy spheroids
Simbad objects:
19
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