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Twins like to be seen: Observational biases affecting spectroscopically selected binary stars
Andrew G. Cantrell, Tyler J. Dougan
Massive binary stars undergo qualitatively different evolution when the two components are similar in mass ('twins'), and the abundance of twin binaries is therefore important to u…
The Black Hole Binary V4641 Sagitarii: Activity in Quiescence & Improved Mass Determinations
Rachel K. D. MacDonald, Charles D. Bailyn, Michelle Buxton +6
We examine ~10 years of photometric data and find that the black hole X-ray binary V4641 Sgr has two optical states, passive and active, during X-ray quiescence. The passive state…
Multiwavelength Observations of A0620-00 in Quiescence
C. S. Froning, A. G. Cantrell, T. J. Maccarone +17
[Abridged.] We present multiwavelength observations of the black hole binary system, A0620-00. Using the Cosmic Origins Spectrograph on the Hubble Space Telescope, we have obtained…