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Four new self-lensing binaries from Kepler: Radial velocity characterization and astrophysical implications

Published online by Cambridge University Press:  09 October 2020

Kento Masuda Open the ORCID record for Kento Masuda [Opens in a new window] ,
Hajime Kawahara ,
David W. Latham ,
Allyson Bieryla ,
Morgan MacLeod ,
Masanobu Kunitomo ,
Othman Benomar  and
Wako Aoki
Kento Masuda
Affiliation:
Institute for Advanced Study, Princeton, NJ 08540, USA email: kmasuda@ias.edu
Hajime Kawahara
Affiliation:
Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan Research Center for the Early Universe, School of Science, The University of Tokyo, Tokyo 113-0033, Japan email: kawahara@eps.s.u-tokyo.ac.jp
David W. Latham
Affiliation:
Center for Astrophysics | Harvard & Smithsonian, Cambridge, MA 02138, USA
Allyson Bieryla
Affiliation:
Center for Astrophysics | Harvard & Smithsonian, Cambridge, MA 02138, USA
Morgan MacLeod
Affiliation:
Center for Astrophysics | Harvard & Smithsonian, Cambridge, MA 02138, USA
Masanobu Kunitomo
Affiliation:
Department of Physics, School of Medicine, Kurume University, Fukuoka 830-0011, Japan
Othman Benomar
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
Wako Aoki
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
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In Kawahara et al. (2018) and Masuda et al. (2019), we reported the discovery of four self-lensing binaries consisting of F/G-type stars and (most likely) white dwarfs whose masses range from 0.2 to 0.6 solar masses. Here we present their updated system parameters based on new radial velocity data from the Tillinghast Reflector Echelle Spectrograph at the Fred Lawrence Whipple Observatory, and the Gaia parallaxes and spectroscopic parameters of the primary stars. We also briefly discuss the astrophysical implications of these findings.

Keywords

binaries: eclipsingblue stragglersgravitational lensingtechniques: radial velocitieswhite dwarfs

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