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Two candidate brown dwarf companions around core helium-burning stars
V. Schaffenroth, L. Classen, K. Nagel +4
Hot subdwarf stars of spectral type B (sdBs) are evolved, core helium-burning objects. The formation of those objects is puzzling, because the progenitor star has to lose almost it…
New HW Virginis Systems from the MUCHFUSS Project
V. Schaffenroth, S. Geier, I. Barbu-Barna +3
In course of the MUCHFUSS project we found two new HW Virginis systems. J192059+372220 (J1920) has an orbital period of 0.169 d and an M dwarf companion with a mass of $0.116 M_{\o…
Binaries discovered by the MUCHFUSS project: SDSS J162256.66473051.1 - An eclipsing subdwarf B binary with a brown dwarf companion
V. Schaffenroth, S. Geier, U. Heber +5
Hot subdwarf B stars (sdBs) are core helium-burning stars located on the extreme horizontal branch. About half of the known sdB stars are found in close binaries. Their short orbit…