90 citations · 109 across the 4 of their papers we have counts for
8 papers
Environmental effects on the ionization of brown dwarf atmospheres
M. Isabel Rodriguez-Barrera, Christiane Helling, Kenneth Wood
Brown dwarfs emit bursts of Halpha, white light flares, and show radio flares and quiescent radio emission. They are suggested to form Aurorae, similar to planets in the solar syst…
Atmospheres of Brown Dwarfs
Christiane Helling, Sarah Casewell
Brown Dwarfs are the coolest class of stellar objects known to date. Our present perception is that Brown Dwarfs follow the principles of star formation, and that Brown Dwarfs shar…
Planetary host stars: Evaluating uncertainties in ultra-cool model atmospheres
I. Bozhinova, Ch. Helling, A. Scholz
M-dwarfs are emerging in the literature as promising targets for detecting low-mass, Earth-like planets. An important step in this process is to determine the stellar parameters of…
First spectroscopic observations of the sub-stellar companion of the young debris disk star PZ Telescopii
T. O. B. Schmidt, M. Mugrauer, R. Neuhäuser +5
In 2010 a sub-stellar companion to the solar analog pre-main sequence star PZ Tel and member of the about 12 Myr old Beta Pic moving group was found by high-contrast direct imaging…
Characterization of the gaseous companion κ Andromedae b: New Keck and LBTI high-contrast observations
M. Bonnefoy, T. Currie, G. -D. Marleau +64
We previously reported the direct detection of a low mass companion at a projected separation of 55+-2 AU around the B9 type star κ Andromedae. The properties of the system (mass r…
The impact of M-dwarf atmosphere modelling on planet detection
I. Bozhinova, Ch. Helling, C. Stark
Being able to accurately estimate stellar parameters based on spectral observations is important not only for understanding the stars themselves but it is also vital for the determ…