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Identification of the TW Hya Association member 2M123539: a tertiary component of the HR 4796 system
Joel H. Kastner, B. Zuckerman, M. Bessell
The association of the late-type star 2MASS J12354893-3950245 (2M1235-39) with a bright X-ray source detected serendipitously by ROSAT and XMM-Newton, combined with its proximity t…
Molecules in the Circumstellar Disk Orbiting BP Piscium
Joel H. Kastner, B. Zuckerman, Thierry Forveille
BP Psc is a puzzling late-type, emission-line field star with large infrared excess. The star is encircled and enshrouded by a nearly edge-on, dust circumstellar disk, and displays…
Spitzer IRAC Observations of White Dwarfs. I. Warm Dust at Metal-Rich Degenerates
J. Farihi, B. Zuckerman, E. E. Becklin
This paper presents the results of a Spitzer IRAC 3-8 micron photometric search for warm dust orbiting 17 nearby, metal-rich white dwarfs, 15 of which apparently have hydrogen domi…
A Dusty Disk Around GD 362, a White Dwarf With a Uniquely High Photospheric Metal Abundance
E. E. Becklin, J. Farihi, M. Jura +3
Eighteen years after an infrared excess was discovered associated with the white dwarf G29-38, we report ground-based measurements (JHKL'N') with mJy-level sensitivity of GD 362 th…
A Giant Planet Candidate near a Young Brown Dwarf
G. Chauvin, A. -M. Lagrange, C. Dumas +5
We present deep VLT/NACO infrared imaging and spectroscopic observations of the brown dwarf 2MASSWJ1207334-393254, obtained during our on-going adaptive optics survey of southern y…
The Circumstellar Disk of HD 141569 Imaged with NICMOS
A. J. Weinberger, E. E. Becklin, G. Schneider +5
Coronagraphic imaging with the Near Infrared Camera and Multi Object Spectrometer on the Hubble Space Telescope reveals a large, ~400 AU (4'') radius, circumstellar disk around the…