Aql X-1 in Outburst and Quiescence

Details Aql X-1 in Outburst and Quiescence Aql X-1 in Outburst and Quiescence

1999-01-07

arxiv.org/abs/astro-ph/9901075v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in ApJ, 12 pages, 5 figures

Scientific paper

10.1086/307283

We present photometry and spectroscopy of the soft x-ray transient Aql X-1. Optical photometry during an active state shows a strong (0.6 mag peak-to-peak) modulation at a period of 19 hours. Infrared (K'-band) photometry during a quiescent state limits any ellipsoidal variations to <0.07 mag (peak-to-peak), which implies an inclination i<31 (90% limit). Spectroscopy in a quiescent state shows at most very small radial velocity variations, which implies a very low inclination of i<12 (90% limit). The low inclination is rather unexpected given the large photometric modulation seen in the active state. The upper limit to the equivalent width of the anomalous Li 6707A line is <0.3A, which is similar to the measured strength of this line in several other x-ray transients.

Affiliated with

Also associated with

No associations

Rating

Aql X-1 in Outburst and Quiescence 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 Aql X-1 in Outburst and Quiescence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aql X-1 in Outburst and Quiescence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-207788