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KBS 13 -- a Rare Reflection Effect sdB Binary with an M Dwarf Secondary
B. -Q. For, H. Edelmann, E. M. Green +3
We report preliminary VRI differential photometric and spectroscopic results for KBS 13, a recently discovered non-eclipsing sdB+dM system. Radial velocity measurements indicate an…
A New, Bright, Short-Period, Emission Line Binary in Ophiuchus
M. A. Stark, Richard A. Wade, John R. Thorstensen +4
The 11th magnitude star LS IV -08 3 has been classified previously as an OB star in the Luminous Stars survey, or alternatively as a hot subdwarf. It is actually a binary star. We…
Tidal synchronization of the subdwarf B binary PG 0101+039
S. Geier, S. Nesslinger, U. Heber +3
Tidally locked rotation is a frequently applied assumption that helps to measure masses of invisible compact companions in close binaries. The calculations of synchronization times…
Observations and asteroseismic analysis of the rapidly pulsating hot B subdwarf PG 0911+456
S. K. Randall, E. M. Green, V. Van Grootel +11
The principal aim of this project is to determine the structural parameters of the rapidly pulsating subdwarf B star PG 0911+456 from asteroseismology. Our work forms part of an on…
Light curve analysis of the hybrid sdB pulsators HS0702+6043 and HS2201+2610
R. Lutz, S. Schuh, R. Silvotti +6
We present the detection of low-amplitude, long-period g-modes in two individual sdBV stars which are known to be p-mode pulsators. Only few of these hybrid objects, showing both p…
Spitzer observations of a 24 micron shadow: Bok Globule CB190
Amelia M. Stutz, John H. Bieging, George H. Rieke +8
We present Spitzer observations of the dark globule CB190 (L771). We observe a roughly circular 24 micron shadow with a 70 arcsec radius. The extinction profile of this shadow matc…