177 citations · 572 across the 12 of their papers we have counts for
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Emission Line Variability of the Accreting Young Brown Dwarf 2MASSW J1207334-393254: From Hours to Years
Beate Stelzer, Alexander Scholz, Ray Jayawardhana
We have obtained a series of high-resolution optical spectra for the brown dwarf 2MASSW J1207334-393254 (2M1207) using the ESO Very Large Telescope with the UVES spectrograph durin…
Evolution of brown dwarf disks: A Spitzer survey in Upper Scorpius
Alexander Scholz, Ray Jayawardhana, Kenneth Wood +4
We have carried out a Spitzer survey for brown dwarf (BD) disks in the ~5 Myr old Upper Scorpius (UpSco) star forming region, using IRS spectroscopy from 8 to 12μm and MIPS photome…
Observational Clues to Brown Dwarf Origins
Ray Jayawardhana, Subhanjoy Mohanty, Gibor Basri +3
Over the past year, we have conducted a multi-faceted program to investigate the origin and early evolution of brown dwarfs. Using high-resolution Keck optical spectra of ~30 objec…
A Disk Census for Young Brown Dwarfs
Ray Jayawardhana, David R. Ardila, Beate Stelzer +1
Recent surveys have identified sub-stellar objects down to planetary masses in nearby star-forming regions. Reliable determination of the disk frequency in young brown dwarfs is of…
X-ray Emission near the Substellar Limit: The sigma Orionis and Taurus Star Forming Regions
F. Mokler, B. Stelzer
We have carried out an extensive search for X-ray emission from young, very low-mass objects near and beyond the substellar limit, making use of archived ROSAT PSPC and HRI observa…
A Search for Disk Emission in Young Brown Dwarfs: L'-band Observations of sigma Orionis and TW Hydrae
Ray Jayawardhana, David R. Ardila, Beate Stelzer
Studies of disks around young brown dwarfs are of paramount importance to our understanding of the origin, diversity and early evolution of sub-stellar objects. Here we present fir…