NOAO > Observing Info > Approved Programs > 2011A-0419
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NOAO > Observing Info > Approved Programs > 2011A-0419 |
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PI: Saeqa Vrtilek, Harvard-Smithsonian Center for Astrophysics, svrtilek@cfa.harvard.edu
Address: High Energy Astrophysics; Solar, Stellar, and Planetary, 60 Garden Street Mail Stop 83, Cambridge, USA
CoI: Danny Steeghs, Warwick University
CoI: Daniel Calvelo, University of Southampton
Title: Modulation tomography of the Black Hole source GRS 1716-249
Abstract:
We propose observations of the black hole X-ray binary J1716-249
(V2293 Oph) in order to construct modulated tomograms in selected
optical lines that will enable us to study the geometry of the accretion
flow and to examine spectral signatures that differentiate between
neutron stars and black holes. J1716-249 exhibits superhump modulation
and related X-ray behavior that makes it a prime candidate to show disk
eccentricity and significant flickering as we have observed in V616 Mon;
the former provides important clues about the nature of the disk
evolution in X-ray binaries and the latter allows us to test models for
disk instabilities in X-ray novae. In addition to the tomograms the
data will also allow us to improve the radial velocities, measure K2
from the irradiated emission lines, and refine the mass ratio by fitting
the rotational broadening of the secondary.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2011A-0419 |
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