Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-07-22
Astronomy and Astrophysics
Astrophysics
18 pages including 4 figures; tentatively scheduled for the March 10, 2000 issue of ApJ; minor revisions
Scientific paper
10.1086/308510
In 1998 we made UV spectroscopic observations with HST/STIS of A0620-00 and Cen X-4, which are two X-ray novae (aka soft X-ray transients). These binary systems are similar in all respects except that the former contains a black hole and the latter contains a neutron star. A UV spectrum (1700-3100A) is presented for the quiescent state of each system in the context of previously published UV/optical and X-ray data. The non-stellar, continuum spectrum of black hole A0620-00 has a prominent UV/optical peak centered at about 3500A. In contrast the spectrum of neutron-star Cen X-4 lacks a peak and rises steadily with frequency over the entire UV/optical band. In the optical, the two systems are comparably luminous. However, black hole A0620-00 is about 6 times less luminous at 1700A, and about 40 times less luminous in the X-ray band. The broadband spectrum of A0620-00 is discussed in terms of the advection-dominated accretion flow model.
McClintock Jeffrey E.
Remillard Ronald A.
No associations
LandOfFree
HST/STIS UV Spectroscopy of Two Quiescent X-ray Novae: A0620-00 and Centaurus X-4 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with HST/STIS UV Spectroscopy of Two Quiescent X-ray Novae: A0620-00 and Centaurus X-4, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and HST/STIS UV Spectroscopy of Two Quiescent X-ray Novae: A0620-00 and Centaurus X-4 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-198074