Detached binaries in the Large Magellanic Cloud

Abstract

Abstract.As a result of a careful selection of eclipsing binaries in the Large Magellanic Cloud using the OGLE-II photometric database, we present a list of 98 systems that are suitable targets for spectroscopic observations that would lead to the accurate determination of the distance to the LMC. For these systems we derive preliminary parameters combining the OGLE-II data with the photometry of MACHO and EROS surveys. In the selected sample, 58 stars have eccentric orbits. Among these stars we found fourteen systems showing apsidal motion. The data do not cover the whole apsidal motion cycle, but follow-up observations will allow detailed studies of these interesting objects.

Light Curve Solutions of Ten Eccentric Kepler Binaries, Three of them with Tidally Induced Humps

“…(1) We established high sensibility of the solutions (measured by χ 2 ) to the mass ratio ( Figure 11). This result differed from those of Michalska & Pigulski (2004) and Terrell & Wilson (2005) who found that for detached EBs equally good fits can be obtained in a very large range of mass ratios. We attributed the sensibility of our solutions to the mass ratio to the following: high precision of the Kepler data, very small relative radii of the stars of our sample, and eccentric orbits of our targets.…”

Light curve solutions of the eccentric Kepler binaries KIC 4281895 and KIC 5115178 with tidally-induced humps

“…11). This result differed from those of Michalska & Pigulski (2004) and Terrell & Wilson (2005) who found that for detached eclipsing binaries equally good fits can be obtained in a very large range of mass ratios. We attributed the sensibility of our solutions to the mass ratio to the following reasons: high precision of the Kepler data; very small relative radii of the stars of our sample; eccentric orbits of our targets.…”