Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21341012b&link_type=abstract
American Astronomical Society, AAS Meeting #213, #410.12; Bulletin of the American Astronomical Society, Vol. 41, p.213
Astronomy and Astrophysics
Astronomy
Scientific paper
New precision V & Rc light curves of the eclipsing binaries V1033 Her and V1044 Her have been obtained using the 41-cm telescope at the Eastern University Observatory equipped with an SBIG ST-10XME CCD. V1033 Her (GSC 2066:1210, P = 0.2981 days, m = 11.2) has only one published unfiltered light curve (Blattler and Diethelm 2001a) with significant scatter in the data. The system was observed on seven nights from 15 Jun - 26 Jul 2006, accumulating approximately 800 observations in both V and Rc. The light curves show distinctly that the system is totally eclipsing and preliminary analysis indicates that that binary is W-type (the larger, more massive star is the cooler component), has a mass ratio of 0.30, small temperature difference between the stars of 300 K, and a fillout of 0.20.
V1044 Her (GSC 3073:837, P = 0.2406 days, m = 12.5) is a partially eclipsing overcontact system of very short period and relatively deep eclipses of 0.6 mag in Rc. The previously published unfiltered light curve given by Blattler and Diethelm (2001b) had too much scatter for reliable analysis. V1044 Her was observed on eleven nights from 5 Jun - 10 Jul 2005, accumulating more than 800 observations in both V and Rc. Preliminary light curve models indicate a W-type system with a small temperature difference between the stars of 200 K, inclination greater than 80 degrees and an indication of the presence of starspots.
The complete light curve analyses as well as a period study of all published times of minimum light will be presented for both systems.
Bradstreet David H.
Grau D. M.
Plumberg Christopher J.
Sanders Jeffrey S.
Wiley T. B.
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