105 citations · 371 across the 9 of their papers we have counts for
11 papers
Steady and Transient Radio Emission from Ultracool Dwarfs
R. A. Osten, N. Phan-Bao, S. L. Hawley +2
We detect radio emission in an additional two epochs of the ultracool dwarf binary LP 349- 25, finding that the observed emission is broadband and steady on timescales between 10s…
Structure and Evolution of Pre-Main Sequence Stars
Norbert S. Schulz, Glenn Allen, Mark W. Bautz +28
Low-mass pre-main sequence (PMS) stars are strong and variable X-ray emitters, as has been well established by EINSTEIN and ROSAT observatories. It was originally believed that thi…
Transient Emissions from Radio-Active Stars: Implications for Wide-Field Radio Surveys
Rachel A. Osten
Variability is a common characteristic of magnetically active stars. Flaring variability is usually interpreted as the observable consequence of transient magnetic reconnection pro…
Ultra-high-time Resolution Observations of Radio Bursts on AD Leonis
R. A. Osten, T. S. Bastian
We report observations of a radio burst that occurred on the flare star AD Leonis over a frequency range of 1120-1620 MHz (lambda ~18-27 cm). These observations, made by the 305m t…
A Chandra X-ray detection of the L dwarf binary Kelu-1: Simultaneous Chandra and Very Large Array observations
M. Audard, R. A. Osten, A. Brown +4
Magnetic activity in ultracool dwarfs, as measured in X-rays and H, shows a steep decline after spectral type M7-M8. So far, no L dwarf has been detected in X-rays. In contrast,…
Discovery of Radio Emission from the Tight M8 Binary: LP 349-25
N. Phan-Bao, R. A. Osten, J. Lim +2
We present radio observations of 8 ultracool dwarfs with a narrow spectral type range (M8-M9.5) using the Very Large Array at 8.5 GHz. Only the tight M8 binary LP 349-25 was detect…