The first broadband study of a black hole transient in quiescence with NuSTAR and XMM-Newton
Abstract
Some of the most significant questions concerning the physics of accreting black holes (BHs) are addressed by studying BH transients at low mass accretion rates. This is where radio observations indicate the presence of steady and powerful jets, and quiescence is where significant accretion energy may be advected across the BH event horizon. While quiescent BHs have been studied previously at soft X-rays, the Nuclear Spectroscopic Telescope Array (NuSTAR) provides the first opportunity to extend coverage to energies above 10 keV. In 2013 October, we will observe V404 Cyg with NuSTAR (3-79 keV), XMM-Newton (0.3-12 keV), and VLA at radio frequencies. Of the known BH transients, V404 Cyg is known to have the highest quiescent flux, primarily due to its proximity (2.39+/-0.14 kpc). We will report on the broadband X-ray spectrum and a search for correlations between the hard X-ray, soft X-ray, and radio light curves.
- Publication:
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American Astronomical Society Meeting Abstracts #223
- Pub Date:
- January 2014
- Bibcode:
- 2014AAS...22343812R