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Fundamental Properties of Low-Mass Stars and Brown Dwarfs
Michael C. Liu, Keivan G. Stassun, France Allard +7
Precise measurements of the fundamental properties of low-mass stars and brown dwarfs are key to understanding the physics underlying their formation and evolution. While there has…
Spatial Distributions of Young Stars
Adam L. Kraus, Lynne A. Hillenbrand
We analyze the spatial distributions of young stars in Taurus-Auriga and Upper Sco as determined from the two-point correlation function (i.e. the mean surface density of neighbors…
An Upper Mass Limit on a Red Supergiant Progenitor for the Type II-Plateau Supernova SN 2006my
Douglas C. Leonard, Avishay Gal-Yam, Derek B. Fox +5
We analyze two pre-supernova (SN) and three post-SN high-resolution images of the site of the Type II-Plateau supernova SN 2006my in an effort to either detect the progenitor star…
The Disk Around CoKu Tau/4: Circumbinary, not Transitional
M. J. Ireland, A. L. Kraus
CoKu Tau/4 has been labeled as one of the very few known transition disk objects: disks around young stars that have their inner disks cleared of dust, arguably due to planetary fo…
Mapping the Shores of the Brown Dwarf Desert I.: Upper Scorpius
Adam L. Kraus, Michael J. Ireland, Frantz Martinache +1
We present the results of a survey for stellar and substellar companions to 82 young stars in the nearby OB association Upper Scorpius. This survey used nonredundant aperture-mask…
Dynamical Mass of GJ 802B: a brown dwarf in a triple system
M. J. Ireland, A. Kraus, F. Martinache +2
We report a dynamical measurement of the mass of the brown dwarf GJ 802B using aperture-masking interferometry and astrometry. In addition, we report the discovery that GJ 802A is…