SIMBAD references

2018ApJ...863..135C - Astrophys. J., 863, 135-135 (2018/August-3)

A likely supermassive black hole revealed by its EINSTEIN radius in Hubble Frontier Fields images.


Abstract (from CDS):

At cosmological distances, gravitational lensing can in principle provide direct mass measurements of supermassive black holes (SMBHs). Here, we directly estimate the mass of a SMBH in the brightest cluster galaxy (BCG) of MACS J1149.5+2223 at z = 0.54 using one of the multiply lensed images of a background spiral galaxy at z = 1.49 projected close to the BCG. A lensed arc is curved toward the BCG center, corresponding to an intrinsically compact region in one of the spiral arms. This arc has a radius of curvature of only ∼0.''6, betraying the presence of a local compact deflector. Its curvature is most simply reproduced by a point-like object with a mass of 8.4–1.8+4.3×109M, similar to SMBH masses in local elliptical galaxies having comparable luminosities. The SMBH is noticeably offset by 4.4 ± 0.3 kpc from the BCG light center, which is plausibly the result of a kick imparted ∼2.0 x 107 years ago during the merger of two SMBHs, placing it just beyond the stellar core. A similar curvature can be produced by replacing the offset SMBH with a compact galaxy having a mass of ∼2 x 1010 M within a cutoff radius of <4 kpc, and an unusually large M/L> 50(M/L) to make it undetectable in the deep Hubble Frontiers Fields image, at or close to the cluster redshift. However, such a lensing galaxy perturbs the adjacent lensed images in an undesirable way.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: clusters: individual: MACS J1149.5+2223 - galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: nuclei - gravitational lensing: strong

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 8

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