The optical light curve of the low-mass X-ray binary XB 1254-690

Details The optical light curve of the low-mass X-ray binary XB 1254-690 The optical light curve of the low-mass X-ray binary XB 1254-690

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...313..792m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 313, Feb. 15, 1987, p. 792-800. CNRS-supported research.

Astronomy and Astrophysics

Astrophysics

46

Light Curve, Optical Measurement, Periodic Variations, Visual Photometry, X Ray Binaries, Accretion Disks, Interstellar Extinction, Stellar Color, Stellar Mass, Stellar Models, Stellar Spectrophotometry

Scientific paper

The discovery of periodic optical variations from the counterpart of the low-mass X-ray binary XB 1254-690 is reported. The period is 0.163890 + or - 0.000009 days, identical to the recurrence period of X-ray dips. The full amplitude of the light curve is 0.4 mag and the mean V-magnitude is 19.1. From spectrophotometric observations the authors derive a B-V color index of 0.31 + or - 0.05 and an interstellar reddening of E(B-V) = 0.4 + or - 0.1. The optical minimum occurs 0.15 in phase after X-ray dips. Most of the optical light curve is probably due to varying aspect of the X-ray-heated secondary atmosphere. The contribution of the X-ray-heated bulge does not dominate the optical variability. The X-ray-heated secondary explanation supports the interpretation that the X-ray dips are due to eclipses by a bulge located on the edge of the accretion disk and indicates that at least in the case of XB 1254-690 the accretion disk does not shadow completely the companion star.

Affiliated with

Also associated with

No associations

Rating

The optical light curve of the low-mass X-ray binary XB 1254-690 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 The optical light curve of the low-mass X-ray binary XB 1254-690, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The optical light curve of the low-mass X-ray binary XB 1254-690 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1011706