Absolute dimensions and apsidal motion of the eccentric binary PT Velorum

Details Absolute dimensions and apsidal motion of the eccentric binary PT Velorum Absolute dimensions and apsidal motion of the eccentric binary PT Velorum

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mnras.384.1657b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 384, Issue 4, pp. 1657-1667.

Astronomy and Astrophysics

Astronomy

6

Binaries: Eclipsing, Binaries: Spectroscopic, Stars: Evolution, Stars: Fundamental Parameters, Stars: Individual: Pt Velorum

Scientific paper

High-resolution (λ/dλ ~ 41000) echelle spectra of the eccentric binary system PT Vel were analysed. Precise spectroscopic orbital elements of the system were obtained by means of cross-correlation technique. According to the solution of radial velocities with Hipparcos and All Sky Automated Survey-3 (ASAS-3) light curves, PT Vel consists of two main-sequence stars with masses M1 = 2.198 +/- 0.016Msolar,M2 = 1.626 +/- 0.009Msolar, radii R1 = 2.094 +/- 0.020Rsolar,R2 = 1.559 +/- 0.020Rsolar and temperatures Teff1 = 9250 +/- 150 K, Teff2 = 7650 +/- 200 K separated from each other by A = 9.74 +/- 0.02Rsolar in an orbit inclined . The projected rotational velocities of component stars were found to be (v sini)1 = 63 +/- 2 and (v sini)2 = 40 +/- 3kms-1 from the comparison of observed spectra with synthetic spectra which were calculated using model atmospheres. Our measurements of the projected rotational velocities indicate that both stars rotate synchronously. Analysis of longitude of periastron values obtained from light-curve analysis from different photometric sets of this moderately eccentric system (e = 0.127 +/- 0.006) has revealed a significant motion of the line of apsides of corresponding to an apsidal motion period of U = 182.2 +/- 8.4yr. The contribution from general relativity effects is moderate (~9 per cent). A comparison with predictions from interior structure models shows the real stars to be more concentrated in mass than expected. Comparison of absolute dimensions with theoretical isochrones yielded an age of the system of 400 +/- 40 Myr.

Affiliated with

Also associated with

No associations

Rating

Absolute dimensions and apsidal motion of the eccentric binary PT Velorum 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 Absolute dimensions and apsidal motion of the eccentric binary PT Velorum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absolute dimensions and apsidal motion of the eccentric binary PT Velorum will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-870721