The Bhc Soft X-Ray Transient XTE J1908+094 Returning to Quiescence

Details The Bhc Soft X-Ray Transient XTE J1908+094 Returning to Quiescence The Bhc Soft X-Ray Transient XTE J1908+094 Returning to Quiescence

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cxo..prop.1356j&link_type=abstract

Chandra Proposal ID #04408138

Physics

Chandra Proposal Id #04408138

Scientific paper

With the Chandra satellite we can study the spectra of SXTs as they fade into quiescence. This has never been done for a BHC SXT! According to evolutionary and SXT outburst theories there may exist a whole class of persistent but faint accreting BHCs at low Mdot; their accretion disk is cold and hence not prone to the SXT outburst mechanism. Up to now there is very few information on spectral states for BHCs for ~2 orders of magnitude in flux (~10^-7-10^-5 Edd.; there is spectral information of BHCs in quiescence at ~10^-8 of Edd.). Gallo et al. 2003 have demonstrated the existence of a universal coupling between observed X-ray and radio flux from hard state BHCs, of the form L_radio~L_X^0.7, over three orders of magnitude. We propose to extend this relation down to ~5x10^-7 Edd. assuming d=10 kpc. This would demonstrate that jet production is the standard behavior and it is only in the limited range in Mdot in which a standard thin disc is formed that a jet is not produced.

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