Binaries with Total Eclipses in the LMC: Potential Targets for Spectroscopy

Abstract

Abstract. 35 Eclipsing binaries presenting unambiguous total eclipses were selected from a subsample of the list of Wyrzykowski et al. (2003). The photometric elements are given for the I curve in DiA photometry, as well as approximate T eff and masses of the components. The interest of these systems is stressed in view of future spectroscopic observations.

Eclipsing Binary Stars in the Large and Small Magellanic Clouds from the MACHO Project: The Sample

“…Andersen (1991)). The method affords high precision due to its purely geometrical nature and has been applied by a number of authors to determine the distance to the Large Magellanic Cloud (LMC) using HV2274 (Udalski et al 1998a;Guinan et al 1998;Nelson et al 2000;Groenewegen & Salaris 2001), HV982 (Fizpatrick et al 2002), EROS 1044 (Ribas et al 2002) and HV 5936 ; an attempt to use EBs to determine the distance to M31 is currently under way and the DIRECT project is attempting to measure the distance to M31 and M33 via EBs and Cepheids (Kaluzny et al 1998;Bonanos et al 2003;Bonanos 2005); other recent examples include Michalska & Pigulski (2005) who present a sample of detached binaries in the LMC for distance determination and Ribas et al (2005) who present the first determination of the distance and properties of an EB in M31; North (2006) presents a sample of EBs with total eclipses in the LMC suitable for spectroscopic studies. In general it is important that distances be determined using a large sample of EBs to minimize the impact of systematic errors.…”