The Nature of the [O III] Emission Source in Black Hole Host Globular Cluster RZ2109
Abstract
The globular cluster RZ2109 located in NGC4472 was the first unambiguous identification of a black hole x-ray source in a globular cluster. Optical spectroscopy of RZ2109 display 3000 km s-1 [O III]λλ4959,5007 line along with the stellar spectra of the host globular cluster. Notably, the observed
spectrum lacks measurable emission from any other atomic species. In this talk we present a multi-facility study of the low to moderate resolution (R 400-2400) optical spectra of RZ2109 with observations spanning 467 days. We focus on the [O III]λ5007 line velocity profile and variability along with the lower limit on the [O III]λ5007/Hβ ratio. We then consider possible models for the nature and geometry of emission line region. Finally we describe the ongoing search for additional broad emission line systems in x-ray binary hosting globular clusters. MMS and SEZ wish to acknowledge support from NSF grants AST-0406891 and AST-0807557.- Publication:
-
American Astronomical Society Meeting Abstracts #217
- Pub Date:
- January 2011
- Bibcode:
- 2011AAS...21740902S