A T-dwarf Companion to HD150451AB

Details A T-dwarf Companion to HD150451AB A T-dwarf Companion to HD150451AB

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.4609c&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #46.09; Bulletin of the American Astronomical Society, Vol. 34, p.1176

Physics

Optics

1

Scientific paper

We present strong evidence of an early-type methane brown dwarf companion to the binary system HD150451AB. We obtained J-band and K-band diffraction-limited images with the Palomar Adaptive Optics system (PALAO) and the PHARO camera on the Hale 5-meter telescope, revealing an object having infrared colors and luminosities consistent with an early-type T-dwarf. We also obtained high-resolution astrometry over two years, showing common proper motion and confirming the object as a true physical companion. We used differential methane band imaging with the Palomar Wide-field Infrared Camera (WIRC) to reveal methane absorption, confirming the T-dwarf nature of the object. We observed apparent variability in the methane depression with ~{50%} amplitude over a ~{72}-hour timescale. After Gliese 229B and Gliese 570D, HD150451C is only the third known methane binary companion to a normal star.

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