Reconstructing the Evolution of HZ 9: a Post-common Envelope Binary in the Hyades Open Cluster
Year: 2024
Type: article
Abstract: HZ 9 is a post-common-envelope binary consisting of a DA white dwarf and a dM main-sequence star in the Hyades star cluster. In this work, we measured precise masses of the components of HZ 9 using new ground-based radial velocity measurements and combining those with recently developed mass-luminosity relationships for M dwarfs. Using the parallax measured by ESA's Gaia Mission and infrared magnitudes from the Two Micron All Sky Survey (2MASS), we determine a precise mass of the dM component. We measured single-line radial velocities of the dM using the high-resolution infrared iSHELL spectrograph on NASA's Infrared Telescope Facility, and we measured optical double-line radial velocities of both components using the DeVeny spectrograph on the Lowell Discovery Telescope. Combining the radial velocity measurements with the measured dM mass, we measured a precise mass of the DA component. Using this measured white dwarf mass and the age of the Hyades, we reconstruct the common envelope evolution of the binary.
Author: Muirhead, Philip
Institution: Boston University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6949400436
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