Radial velocities of Praesepe & Hyades Am stars (Debernardi+ 2000)

Details Radial velocities of Praesepe & Hyades Am stars (Debernardi+ 2000) Radial velocities of Praesepe & Hyades Am stars (Debernardi+ 2000)

Mar 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ycat..33540881d&link_type=abstract

VizieR On-line Data Catalog: J/A+A/354/881. Originally published in: 2000A+A...354..881D

Physics

Clusters: Open, Binaries: Spectroscopic, Stars: Am, Radial Velocities

Scientific paper

CORAVEL radial-velocity observations of Am stars in the Hyades and Praesepe have allowed the determination of orbital elements for 10 spectroscopic binaries, among which 3 are first determinations. One Am star (KW 40) is found to be a well hierarchised triple system. KW 538 has a rather long period (435 days) for an Am star. Orbits of systems with periods shorter than 8.5 days are circularized, or present eccentricities smaller than 0.04. For 19 Am stars, the number of quadruple-, triple-, double-, single systems is 1:2:14(10+4?):(2?). The Am stars in a ({beta}, B-V) diagram clearly stand away by 0.03mag from the sequence defined by normal main-sequence stars. This diagram could be a powerful method to identify Am stars in more distant open clusters, provided there is no differential reddening. In the colour-magnitude diagram (MV, {beta}), double-lined binaries are 0.6-0.7mag above the ZAMS as expected, while most single-lined are close to or on the ZAMS because the secondary does not contribute much light. The absence of X-ray detection of 4 systems in the Hyades is an argument for the presence of a white dwarf secondary.
(2 data files).

Affiliated with

Also associated with

No associations

Rating

Radial velocities of Praesepe & Hyades Am stars (Debernardi+ 2000) 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 Radial velocities of Praesepe & Hyades Am stars (Debernardi+ 2000), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radial velocities of Praesepe & Hyades Am stars (Debernardi+ 2000) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1824844