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https://doi.org/10.3847/1538-4357/ab5e78

A New Class of Roche Lobe–filling Hot Subdwarf Binaries

Thomas Kupfer, Evan B. Bauer, Kevin B. Burdge, Jan van Roestel, Eric C. Bellm, Jim Fuller, JJ Hermes, Thomas R. Marsh, Lars Bildsten, Shrinivas R. Kulkarni, E. S. Phinney, Thomas A. Prince, Paula Szkody, Yuhan Yao, Andreas Irrgang, Ulrich Heber, David Schneider, Vik S. Dhillon, Gabriel Murawski, Andrew J. Drake, Dmitry A. Duev, Michael Feeney, Matthew J. Graham, Russ R. Laher, S. P. Littlefair, et al.
The Astrophysical Journal Letters 898 (1) L25 (2020)
https://doi.org/10.3847/2041-8213/aba3c2

Alone but not lonely: Observational evidence that binary interaction is always required to form hot subdwarf stars

Ingrid Pelisoli, Joris Vos, Stephan Geier, Veronika Schaffenroth and Andrzej S. Baran
Astronomy & Astrophysics 642 A180 (2020)
https://doi.org/10.1051/0004-6361/202038473

Inferred time-scales for common envelope ejection using wide astrometric companions

Erez Michaely, Hagai B Perets and Andrei P Igoshev
Monthly Notices of the Royal Astronomical Society 494 (1) 1448 (2020)
https://doi.org/10.1093/mnras/staa833

Hot Subdwarf All Southern Sky Fast Transit Survey with the Evryscope

Jeffrey K. Ratzloff, Brad N. Barlow, Péter Németh, Henry T. Corbett, Stephen Walser, Nathan W. Galliher, Amy Glazier, Ward S. Howard and Nicholas M. Law
The Astrophysical Journal 890 (2) 126 (2020)
https://doi.org/10.3847/1538-4357/ab64f3

Discovery of diffuse optical emission lines from the inner Galaxy: Evidence for LI(N)ER-like gas

D. Krishnarao, R. A. Benjamin and L. M. Haffner
Science Advances 6 (27) (2020)
https://doi.org/10.1126/sciadv.aay9711

A search for variable subdwarf B stars in TESS full frame images – I. Variable objects in the southern ecliptic hemisphere

S K Sahoo, A S Baran, S Sanjayan and J Ostrowski
Monthly Notices of the Royal Astronomical Society 499 (4) 5508 (2020)
https://doi.org/10.1093/mnras/staa2991

Hot Subdwarf Stars Identified in Gaia DR2 with Spectra of LAMOST DR6 and DR7. I. Single-lined Spectra

Zhenxin Lei, Jingkun Zhao, Péter Németh and Gang Zhao
The Astrophysical Journal 889 (2) 117 (2020)
https://doi.org/10.3847/1538-4357/ab660a