X-ray Transients: Exploring the Physics of Accretion Disk Instabilities

Details X-ray Transients: Exploring the Physics of Accretion Disk Instabilities X-ray Transients: Exploring the Physics of Accretion Disk Instabilities

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002noao.prop...47w&link_type=abstract

NOAO Proposal ID #2002B-0047

Physics

Scientific paper

Soft X-ray transients (SXTs) are interacting binaries where matter donated by a late-type star is accreted onto a neutron star or black hole. SXTs sporadically undergo drastic outbursts characterized by an increase of several orders of magnitude in the X-ray and optical luminosities. This provides the opportunity to study the physical parameters of the accretion flow for a large range in mass transfer rates. Long term X-ray lightcurves of many SXTs are available from public archives, however, equivalent optical/IR data are lacking. We propose to use the YALO telescope target of opportunity mode to trigger optical observations of X-ray transients once an X-ray outburst is detected and continue daily monitoring to obtain longterm outburst lightcurves. We will observe any newly discovered SXT where the X-ray properties suggest that the compact object is a neutron star.

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