Very Large Telescope Kinematics for Omega Centauri: Further Support for A Central Black Hole

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dc.contributor.utaustinauthorGebhardt, Karlen_US
dc.creatorNoyola, Evaen_US
dc.creatorGebhardt, Karlen_US
dc.creatorKissler-Patig, Markusen_US
dc.creatorLutzgendorf, Noraen_US
dc.creatorJalali, Behrangen_US
dc.creatorde Zeeuw, P. T.en_US
dc.creatorBaumgardt, Holgeren_US
dc.date.accessioned2016-10-28T19:36:54Z
dc.date.available2016-10-28T19:36:54Z
dc.date.issued2010-08en_US
dc.description.abstractThe Galactic globular cluster. Centauri is a prime candidate for hosting an intermediate- mass black hole. Recent measurements lead to contradictory conclusions on this issue. We use VLT- FLAMES to obtain new integrated spectra for the central region of. Centauri. We combine these data with existing measurements of the radial velocity dispersion profile taking into account a new derived center from kinematics and two different centers from the literature. The data support previous measurements performed for a smaller field of view and show a discrepancy with the results from a large proper motion data set. We see a rise in the radial velocity dispersion in the central region to 22.8 +/- 1.2 km s(-1), which provides a strong sign for a central black hole. Isotropic dynamical models for. Centauri imply black hole masses ranging from 3.0 x 10(4) to 5.2 x 10(4) M(circle dot) depending on the center. The best-fitted mass is (4.7 +/- 1.0) x 10(4) M(circle dot).en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipDFG cluster of excellence Origin and Structure of the Universeen_US
dc.description.sponsorshipNSF-0908639.en_US
dc.identifierdoi:10.15781/T2KS6J709
dc.identifier.citationNoyola, Eva, Karl Gebhardt, Markus Kissler-Patig, Nora Lützgendorf, Behrang Jalali, P. Tim De Zeeuw, and Holger Baumgardt. "VERY LARGE TELESCOPE KINEMATICS FOR OMEGA CENTAURI: FURTHER SUPPORT FOR A CENTRAL BLACK HOLEBased on observations collected at the European Organization for Astronomical Research in the Southern Hemisphere, Chile (085. D-0928)." The Astrophysical Journal Letters, Vol. 719, No. 1 (Aug., 2010): L60.en_US
dc.identifier.doi10.1088/2041-8205/719/1/l60en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/2152/43040
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journal Lettersen_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.rights.restrictionOpenen_US
dc.subjectblack hole physicsen_US
dc.subjectglobular clusters: individual (omega centauri)en_US
dc.subjectstars: kinematics and dynamicsen_US
dc.subjecthubble-space-telescopeen_US
dc.subjectdouble main-sequenceen_US
dc.subjectearly-type galaxiesen_US
dc.subjectglobular-clustersen_US
dc.subjectvelocity dispersionen_US
dc.subjectstellar dynamicsen_US
dc.subjectproperen_US
dc.subjectmotionsen_US
dc.subjectstar-clustersen_US
dc.subjectmassen_US
dc.subjectmodelsen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleVery Large Telescope Kinematics for Omega Centauri: Further Support for A Central Black Holeen_US
dc.typeArticleen_US

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