Quiescent Optical Observations of V4641 Sgr

Details Quiescent Optical Observations of V4641 Sgr Quiescent Optical Observations of V4641 Sgr

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002xrb..confe..30o&link_type=abstract

X-ray Binaries in the Chandra and XMM-Newton Era (with an emphasis on Targets of Opportunity), Abstracts of the conference held

Computer Science

V4641 Sgr

Scientific paper

We present extensive photometry and echelle spectroscopy of V4641 Sgr in quiescence. The photometric observations are in 7 filters (U, B, V, R, I, J, and K), collected with four different 1m-class telescopes. The phase coverage is nearly complete. The echelle spectra, obtained with VLT/UVES, have a resolving power of R=33,000 and a signal-to-noise ratio of more than 100. From the spectra we derive a projected rotational velocity of V_rot*sin(i) = 98.9 +/- 1.5 km/sec for the secondary star. The light curves are ellipsoidal with large amplitudes (~0.4 mag in V). From detailed ellipsoidal modelling of the light and velocity curves, and using the constraint that V_rot*sin(i) = 98.9 +/- 1.5 km/sec, we find an inclination of 75 +/- 2 degrees (1 sigma), and a 1 sigma mass ratio range of 2.22 - 2.39. The derived 1 sigma range for the black hole mass is than 6.82 < M_BH < 7.42

Affiliated with

Also associated with

No associations

Rating

Quiescent Optical Observations of V4641 Sgr 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 Quiescent Optical Observations of V4641 Sgr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quiescent Optical Observations of V4641 Sgr will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1194555