5 papers
Search for Dormant Black Holes in Ellipsoidal Variables III. The OGLE BULGE Short-Period Sample
Roy Gomel, Simchon Faigler, Tsevi Mazeh +1
This is the third of a series of papers that presents an algorithm to search for close binaries with massive, possibly compact, unseen secondaries. The detection of such a binary i…
Search for Dormant Black Holes in Ellipsoidal Variables II. A Binary Modified Minimum Mass Ratio
Roy Gomel, Simchon Faigler, Tsevi Mazeh
This is the second of a series of papers that focuses on searching large sets of photometric light curves for evidence of close binaries with a dormant black hole, and, in some cas…
Gaia Early Data Release 3: Structure and properties of the Magellanic Clouds
Gaia Collaboration, X. Luri, L. Chemin +417
We compare the Gaia DR2 and Gaia EDR3 performances in the study of the Magellanic Clouds and show the clear improvements in precision and accuracy in the new release. We also show…
Search for Dormant Black Holes in Ellipsoidal Variables I. Revisiting the Expected Amplitudes of the Photometric Modulation
Roy Gomel, Simchon Faigler, Tsevi Mazeh
Ellipsoidal variables present light-curve modulations caused by stellar distortion, induced by tidal interaction with their companions. An analytical approximated model of the elli…
SB 796: a high-velocity RRc star
Roy Gomel, Sahar Shahaf, Tsevi Mazeh +6
We report here on a detailed study of a c-type RR Lyrae variable (RRc variable), SB 796, serendipitously discovered in a search of the WASP public data for stars that display large…