Other
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7744o&link_type=abstract
HST Proposal ID #7744
Other
Hst Proposal Id #7744 Binary Stars
Scientific paper
EC13471-1258 is a detached DA-dMe eclipsing binary with an orbital period of 3h37m. It is important because monitoring its orbital period from eclipse timings, which can be made with a precision of 5 s or better, will show how rapidly the binary is losing angular momentum, a key issue in the evolution of semi-detached binaries. In addition, the secondary is close to filling its Roche lobe and is chromospherically active {showing occasional flares}. In contrast to the cataclysmic variables, the secondary of EC13471-1258 can be easily studied in the optical. Indeed, its light swamps that of the white dwarf and has prevented the radial velocity curve of the latter from being measured from optical data. We therefore propose to use STIS to measure the white dwarf's radial velocity curve and effective temperature from its Ly-Alpha absorption line, yielding vital information {e.g. the mass ratio and white dwarf's gravitational redshift} which will permit a solution for the masses, radii and other key parameters of the component stars. This knowledge will then permit full exploitation of the insight into semi- detached binaries which this system will provide. Secondary goals are: {i} to measure the temperature of the white dwarf using both the Ly-Alpha profile, and spectrophotometry from the UV to the optical region; {ii} a search for circumstellar material in both G140L and G230L spectra.
No associations
LandOfFree
Fundamental properties of a DA-dM detached eclipsing binary with Porb=3h37m 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 Fundamental properties of a DA-dM detached eclipsing binary with Porb=3h37m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fundamental properties of a DA-dM detached eclipsing binary with Porb=3h37m will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-896205