399 citations · 1.1k across the 8 of their papers we have counts for
12 papers
Variable Sodium Absorption in a Low-Extinction Type Ia Supernova
Joshua D. Simon, Avishay Gal-Yam, Orly Gnat +18
Recent observations have revealed that some Type Ia supernovae exhibit narrow, time-variable Na I D absorption features. The origin of the absorbing material is controversial, but…
Measuring tiny mass accretion rates onto young brown dwarfs
Gregory J. Herczeg, Kelle L. Cruz, Lynne A. Hillenbrand
We present low-resolution Keck I/LRIS spectra spanning from 3200-9000 A of nine young brown dwarfs and three low-mass stars in the TW Hya Association and in Upper Sco. The optical…
The TEXES Survey For H2 Emission From Protoplanetary Disks
M. A. Bitner, M. J. Richter, J. H. Lacy +9
We report the results of a search for pure rotational molecular hydrogen emission from the circumstellar environments of young stellar objects with disks using the Texas Echelon Cr…
UV excess measures of accretion onto young very low-mass stars and brown dwarfs
Gregory J. Herczeg, Lynne A. Hillenbrand
Low-resolution spectra from 3000-9000 AA of young low-mass stars and brown dwarfs were obtained with LRIS on Keck I. The excess UV and optical emission arising in the Balmer and Pa…
High-resolution Spectroscopy of [Ne II] Emission from TW Hya
Gregory J. Herczeg, Joan Najita, Lynne A. Hillenbrand +1
We present high-resolution echelle spectra of [Ne II] 12.81 micron emission from the classical T Tauri star (CTTS) TW Hya obtained with MICHELLE on Gemini North. The line is center…
How Hot is the Wind from TW Hydrae?
C. M. Johns-Krull, G. J. Herczeg
It has recently been suggested that the winds from Classical T Tauri stars in general, and the wind from TW Hya in particular, reaches temperatures of at least 300,000 K while main…