Absolute parameters of the newly-identified contact binary star IS Canis Major

Details Absolute parameters of the newly-identified contact binary star IS Canis Major Absolute parameters of the newly-identified contact binary star IS Canis Major

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010newa...15..247o&link_type=abstract

New Astronomy, Volume 15, Issue 2, p. 247-253.

Astronomy and Astrophysics

Astronomy

3

Masses, Radii, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification, Spectroscopic Binaries, Close Binaries, Eclipsing Binaries

Scientific paper

This paper presents the results of the first high-resolution spectroscopic observations of the Southern W UMa type system IS CMa. Spectroscopic observations of the system were made at Mt. John University Observatory using a HERCULES fibre-fed échelle spectrograph in September 2007. The first radial velocities of the component stars of the system were determined by using the spectral disentangling technique. The resulting orbital elements of IS CMa are: a1sini=0.0041±0.0001 AU, a2sini=0.0135±0.0001 AU, M1sin3i=1.48±0.01M&sun;, and M2sin3i=0.44±0.01M&sun;. The components were found to be in synchronous rotation taking into account the disentangled Hδ line profiles of both components of the system. The Hipparcos light curve was solved by means of the Wilson-Devinney method supplemented with a Monte Carlo type algorithm. The radial velocity curve solutions including the proximity effects give the mass ratio of the system as 0.297 ± 0.001. The combination of the Hipparcos light and radial velocity curve solutions give the following absolute parameters of the components: M1=1.68±0.04M&sun;,M2=0.50±0.02M&sun;,R1=2.00±0.02R&sun;,R2=1.18±0.03R&sun;,L1=7.65±0.60 L&sun; and L2=1.99±0.80L&sun;. The distance to IS CMa was calculated as 87±5 pc using the distance modulus with corrections for interstellar extinction. The position of the components of IS CMa in the HR diagram are also discussed: the system seems to have an age of 1.6 Gyr.

Affiliated with

Also associated with

No associations

Rating

Absolute parameters of the newly-identified contact binary star IS Canis Major 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 parameters of the newly-identified contact binary star IS Canis Major, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absolute parameters of the newly-identified contact binary star IS Canis Major will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1105280