763 citations
70 papers
Re-defining the Empirical ZZ Ceti Instability Strip
Anjum S. Mukadam, D. E. Winget, Ted von Hippel +3
We use the new ZZ Ceti stars (hydrogen atmosphere white dwarf variables; DAVs) discovered within the Sloan Digital Sky Survey (Mukadam et al. 2004) to re-define the empirical ZZ Ce…
Discovery of Optical Bursts from MS1603.6+2600 = UW CrB
R. I. Hynes, E. L. Robinson, E. Jeffery
We report the discovery of several optical burst-like events from the low-mass X-ray binary MS1603.6+2600 (UW CrB). The events last for a few tens of seconds, exhibit a very fast r…
Center-to-Limb Variation of Solar Line Profiles as a Test of NLTE Line Formation Calculations
C. Allende Prieto, M. Asplund, P. Fabiani Bendicho
We present new observations of the center-to-limb variation of spectral lines in the quiet Sun. Our long-slit spectra are corrected for scattered light, which amounts to 4-8 % of t…
No Planet Around HD 219542 B
S. Desidera, R. G. Gratton, M. Endl +8
The star HD 219542 B has been reported by us (Desidera et al. 2003) to show low-amplitude radial velocity variations that could be due to the presence of a Saturn-mass planetary co…
HD 137510: An Oasis in the Brown Dwarf Desert
Michael Endl, Artie P. Hatzes, William D. Cochran +4
Since the beginning of precise Doppler surveys, which have had stunning success in detecting extrasolar planetary companions, one surprising enigma has emerged: the relative paucit…
OGLE-2003-BLG-238: Microlensing Mass Estimate of an Isolated Star
Guangfei Jiang, D. L. DePoy, A. Gal-Yam +38
Microlensing is the only known direct method to measure the masses of stars that lack visible companions. In terms of microlensing observables, the mass is given by M=(c^2/4G)\tild…