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Probing the Substellar Regime with SIRTF
Eduardo L. Martin, Wolfgang Brandner, David Jewitt +4
One of the main scientific drivers of the Space InfraRed Telescope Facility (SIRTF) is the search for brown dwarfs and extrasolar superplanets. We discuss observational strategies…
Chandra Detection of an X-ray Flare from the Brown Dwarf LP 944-20
Robert E. Rutledge, Gibor Basri, Eduardo Martin +1
We have detected a bright X-ray flare from the nearby brown dwarf LP 944-20 with the Chandra/ACIS-S. This is an old (500 Myr), rapidly rotating, lithium-bearing M9 object, with a b…
A search for Jovian-mass planets around CM Draconis using eclipse minima timing
H. J. Deeg, L. R. Doyle, V. P. Kozhevnikov +3
For the eclipsing binary system CM Draconis, eclipse minimum times have been monitored with high precision between 1994 and 1999. Periodic deviations of minimum times from a linear…
A Survey for Low-mass Stars and Brown Dwarfs in the Upper-Scorpius OB Association
David R. Ardila, Eduardo L. Martin, Gibor Basri
The Upper-Scorpius association is the OB association nearest to the Sun (145 pc). Its young age (5 Myr) makes it an ideal place to search for low-mass stars and brown dwarfs, as th…
An Effective Temperature Scale for Late M and L Dwarfs, from Resonance Absorption Lines of CsI and RbI
Gibor Basri, Subhanjoy Mohanty, France Allard +5
We present Keck HIRES spectra of 6 late-M dwarfs and 11 L dwarfs. Our goal is to assign effective temperatures to the objects using detailed atmospheric models and fine analysis of…
Ages, Distances, and the Initial Mass Functions of Stellar Clusters
J. R. Stauffer, R. D. Jeffries, E. L. Martin +1
We provide a review of the current status of several topics on the ages, distances, and mass functions of open clusters, with a particular emphasis on illuminating the areas of unc…