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The LAOG-Planet Imaging Surveys
G. Chauvin, A. -M. Lagrange, D. Mouillet +18
With the development of high contrast imaging techniques and infrared detectors, vast efforts have been devoted during the past decade to detect and characterize lighter, cooler an…
IRTF Observations of White Dwarfs with Possible Near-Infrared Excess
J. Farihi
Near-infrared photometry and spectroscopy is obtained for a heterogeneous sample of nearby white dwarfs with possible excess flux as identified primarily in the Two Micron All Sky…
VLT/NACO Deep imaging survey of young, nearby austral stars
G. Chauvin, A. -M. Lagrange, M. Bonavita +10
Since November 2002, we have conducted the largest deep imaging survey of the young, nearby associations of the southern hemisphere. Our goal is detection and characterization of s…
A glimpse of the end of the dark ages: the gamma-ray burst of 23 April 2009 at redshift 8.3
N. R. Tanvir, D. B. Fox, A. J. Levan +59
It is thought that the first generations of massive stars in the Universe were an important, and quite possibly dominant, source of the ultra-violet radiation that reionized the hy…
X-ray and Infrared Observations of Two Externally-Polluted White Dwarfs
M. Jura, M. P. Muno, J. Farihi +1
With XMM-Newton and the Spitzer Space Telescope, we obtain upper bounds to the X-ray fluxes from G29-38 and GD 362, and the 70 micron flux from G29-38. These data provide indirect…
PHL 5038: A spatially resolved white dwarf + brown dwarf binary
P. R. Steele, M. R. Burleigh, J. Farihi +4
A near-infrared excess is detected at the white dwarf PHL5038 in UKIDSS photometry, consistent with the presence of a cool, substellar companion. We have obtained H- and K-grism sp…