Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-11-01
Astrophys.J.635:L37-L40,2005
Astronomy and Astrophysics
Astrophysics
6 pages, 2 figures, accepted for publication in ApJ Letters
Scientific paper
10.1086/499161
We present the first detailed spectroscopic and photometric analysis of an eclipsing binary in the Andromeda Galaxy (M31). This is a 19.3-mag semi-detached system with components of late-O and early-B spectral types. From the light and radial velocity curves we have carried out an accurate determination of the masses and radii of the components. Their effective temperatures have been estimated from the modeling of the absorption line spectra. The analysis yields an essentially complete picture of the properties of the system, and hence an accurate distance determination to M31. The result is d=772+/-44 kpc ((m-M)_0=24.44+/-0.12 mag). The study of additional systems, currently in progress, should reduce the uncertainty in the M31 distance to better than 5%.
Fitzpatrick Edward L.
Guinan Edward F.
Hilditch Ron W.
Jordi Carme
Ribas Ignasi
No associations
LandOfFree
First Determination of the Distance and Fundamental Properties of an Eclipsing Binary in The Andromeda Galaxy 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 First Determination of the Distance and Fundamental Properties of an Eclipsing Binary in The Andromeda Galaxy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First Determination of the Distance and Fundamental Properties of an Eclipsing Binary in The Andromeda Galaxy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-639269