Very Large Array Limits For Intermediate-Mass Black Holes In Three Globular Clusters

dc.contributor.utaustinauthorBash, F. N.en_US
dc.contributor.utaustinauthorGebhardt, K.en_US
dc.creatorBash, F. N.en_US
dc.creatorGebhardt, K.en_US
dc.creatorGoss, W. M.en_US
dc.creatorBout, P. A. V.en_US
dc.description.abstractThe observational evidence for central black holes in globular clusters has been argued extensively, and their existence has important consequences for both the formation and evolution of the cluster. Most of the evidence comes from dynamical arguments, but the interpretation is difficult, given the short relaxation times and old ages of the clusters. One of the most robust signatures for the existence of a BH is radio and/or X-ray emission. We observed three globular clusters: NGC6093 (M80), NGC6266 (M62), and NGC7078 (M15), with the Very Large Array (VLA) in the A and C configuration with a 3-sigma noise of 36, 36, and 25 mu Jy, respectively. We find no statistically significant evidence for radio emission from the central region for any of the three clusters. NGC6266 shows a 2-sigma detection. It is difficult to infer a mass from these upper limits clue to uncertainty about the central gas density, accretion rate, and accretion model.en_US
dc.identifier.citationBash, F. N., K. Gebhardt, W. M. Goss, and PA Vanden Bout. >Very large array limits for intermediate-mass black holes in three globular clusters.> The Astronomical Journal, Vol. 135, No. 1 (Jan., 2008): 182.en_US
dc.relation.ispartofserialAstronomical 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.subjectaccretion, accretion disksen_US
dc.subjectblack hole physicsen_US
dc.subjectglobular clusters :en_US
dc.subjectradio continuum : generalen_US
dc.subjectdense star-clustersen_US
dc.subjectbh-sigma relationen_US
dc.subjectx-ray binaryen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleVery Large Array Limits For Intermediate-Mass Black Holes In Three Globular Clustersen_US
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
416.71 KB
Adobe Portable Document Format