Dynamical Measurements Of Black Hole Masses In Four Brightest Cluster Galaxies At 100 Mpc

dc.contributor.utaustinauthorMurphy, Jeremy D.en_US
dc.contributor.utaustinauthorGebhardt, Karlen_US
dc.creatorMcConnell, Nicholas J.en_US
dc.creatorMa, Chung-Peien_US
dc.creatorMurphy, Jeremy D.en_US
dc.creatorGebhardt, Karlen_US
dc.creatorLauer, Tod R.en_US
dc.creatorGraham, James R.en_US
dc.creatorWright, Shelley A.en_US
dc.creatorRichstone, Douglas O.en_US
dc.description.abstractWe present stellar kinematics and orbit superposition models for the central regions of four brightest cluster galaxies, based upon integral-field spectroscopy at Gemini, Keck, and McDonald Observatories. Our integral-field data span radii from <100 pc to tens of kiloparsecs, comparable to the effective radius of each galaxy. We report black hole masses, M-circle, of 2.1(-1.6)(+1.6) x 10(10) M-circle dot for NGC 4889, 9.7(-2.5)(+3.0) x 10(9) M-circle dot for NGC 3842, and 1.3(-0.4)(+0.5) x 10(9) M-circle dot for NGC 7768, with errors representing 68% confidence limits. For NGC 2832, we report an upper limit of M-circle < 9.0 x 10(9) M-circle dot. Our models of each galaxy include a dark matter halo, and we have tested the dependence of M-circle on the model dark matter profile. Stellar orbits near the center of each galaxy are tangentially biased, on comparable spatial scales to the galaxies' photometric cores. We find possible photometric and kinematic evidence for an eccentric torus of stars in NGC 4889, with a radius of nearly 1 kpc. We compare our measurements of M-circle to the predicted black hole masses from various fits to the relations between M-circle and stellar velocity dispersion (sigma), luminosity (L), or stellar mass (M-star). Still, the black holes in NGC 4889 and NGC 3842 are significantly more massive than all sigma-based predictions and most L-based predictions. The black hole in NGC 7768 is consistent with a broader range of predictions.en_US
dc.description.sponsorshipNSF AST-1009663en_US
dc.description.sponsorshipMiller Institute for Basic Research in Science, University of California, Berkeleyen_US
dc.description.sponsorshipW. M. Keck Foundationen_US
dc.description.sponsorshipCynthia and George Mitchell Foundation NSF-0908639en_US
dc.identifier.citationMcConnell, Nicholas J., Chung-Pei Ma, Jeremy D. Murphy, Karl Gebhardt, Tod R. Lauer, James R. Graham, Shelley A. Wright, and Douglas O. Richstone. "Dynamical measurements of black hole masses in four brightest cluster galaxies at 100 Mpc." The Astrophysical Journal, Vol. 756, No. 2 (Sep., 2012): 179.en_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectgalaxies: elliptical and lenticular, cden_US
dc.subjectgalaxies: kinematics anden_US
dc.subjectgalaxies: nucleien_US
dc.subjectdark-matter haloen_US
dc.subjectsight velocity distributionsen_US
dc.subjectmassive elliptic galaxiesen_US
dc.subjectadaptive optics systemen_US
dc.subjectfundamental planeen_US
dc.subjectgalactic nucleien_US
dc.subjectmultiobject spectrographen_US
dc.subjectstellar populationsen_US
dc.subject3-integral modelsen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleDynamical Measurements Of Black Hole Masses In Four Brightest Cluster Galaxies At 100 Mpcen_US

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