A new class of Roche lobe-filling hot subdwarf binaries.

@article{Kupfer2020ANC,
title={A new class of Roche lobe-filling hot subdwarf binaries.},
author={T. Kupfer and Evan B. Bauer and K. Burdge and J. Roestel and E. Bellm and J. Fuller and J. Hermes and T. Marsh and L. Bildsten and S. Kulkarni and E. Phinney and T. A. Prince and P. Szkody and Y. Yao and A. Irrgang and U. Heber and D. Schneider and V. Dhillon and G. Murawski and A. Drake and D. Duev and Michael Feeney and M. Graham and R. Laher and S. Littlefair and A. Mahabal and F. Masci and Michael Porter and D. Reiley and Hector P. Rodriguez and B. Rusholme and D. Shupe and M. Soumagnac},
journal={arXiv: Solar and Stellar Astrophysics},
year={2020}
}
• T. Kupfer, +30 authors M. Soumagnac
• Published 2020
• Physics
• arXiv: Solar and Stellar Astrophysics
• We present the discovery of the second binary with a Roche lobe-filling hot subdwarf transferring mass to a white dwarf (WD) companion. This 56 minute binary was discovered using data from the Zwicky Transient Facility. Spectroscopic observations reveal an He-sdOB star with an effective temperature of $T_{\rm eff}=33,700\pm1000$ K and a surface gravity of $log(g)=5.54\pm0.11$. The GTC+HiPERCAM light curve is dominated by the ellipsoidal deformation of the He-sdOB star and shows an eclipse of… CONTINUE READING
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