Eclipsing Binaries in the Magellanic Clouds - Fundamental Properties and Distances

Details Eclipsing Binaries in the Magellanic Clouds - Fundamental Properties and Distances Eclipsing Binaries in the Magellanic Clouds - Fundamental Properties and Distances

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6683g&link_type=abstract

HST Proposal ID #6683

Computer Science

Hst Proposal Id #6683 Binaries And Star Fo

Scientific paper

We propose to observe 10 O/B eclipsing binaries in the LMC &SMC with the HST/FOS over 1150-7075Angstrom to obtainaccurate stellar temperatures. These temperatures, coupledwith radii and masses derived from our ground-basedspectroscopic and photomet ric studies, will yield the firstdirectly determined Mass-Luminosity relation for stars outsidethe Galaxy. Moreover, these binaries can serve as standardcandles allowing the distances to the LMC & SMC to be measureddirectly with a precision of 10-15% per binary. Thelimitation in precision is chiefly due to uncertainties in theabsolute radii of the stars arising from errors in massesderived from the sparsely-covered and noisy ground-basedradial velocity curves. Thus, we also propose a p ilot studyto secure 1% precision masses and radii for a selected LMCeclipsing binary. This will be accomplished by obtaining high-quality (+/-4 kms) radial velocities of the two stars aroundits orbit using medium resolution GHRS spectra. It is estimated from the error budget of these proposed observationsthat the distance to the LMC will be determined to(square)uig5% uncertainty. HV 2274 (B1 IV-III + B1 IV-III;V_max = +14.2; P = 5(d)7 days; e = 0.128) was chosen for thepilot study b ecause it is a relatively bright anduncomplicated binary. It also has the advantage of having awell determined apsidal motion from which the internalstructures of these low metal abundance LMC stars can beprobed. It is only with HST that these

Affiliated with

Also associated with

No associations

Rating

Eclipsing Binaries in the Magellanic Clouds - Fundamental Properties and Distances 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 Eclipsing Binaries in the Magellanic Clouds - Fundamental Properties and Distances, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eclipsing Binaries in the Magellanic Clouds - Fundamental Properties and Distances will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1118187