Browsing Articles by Author "Walker, Gordon A. H."

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Differential rotation of [epsilon] Eridani detected by MOST

Croll, Bryce; Walker, Gordon A. H.; Kuschnig, Rainer; Matthews, Jaymie M.; Rowe, Jason F.; Walker, Andrew; Rucinski, Slavek M.; Hatzes, Artie P.; Cochran, William D.; Robb, Russell M.; Guenther, David B. (American Astronomical Society, 2006-09-01)

The Microvariability and Oscillations of STars (MOST ) photometric satellite observed three rotations of [epsilon] Eri continuously in late 2005. We detected two spots ([delta] m[approximately] 0.01) at different latitudes ...
Looking for giant earths in the HD 209458 system: a search for transits in MOST space-based photometry

Guenther, David B.; Croll, Bryce; Matthews, Jaymie M.; Rowe, Jason F.; Kuschnig, Rainer; Walker, Andrew; Gladman, Brett; Sasselov, Dimitar; Cameron, Chris; Walker, Gordon A. H. (American Astronomical Society, 2007-04)

We have made a comprehensive transit search for exoplanets down to about 2 Earth radii in the HD 209458 system, based on nearly uninterrupted broadband optical photometry obtained with the MOST (Microvariability and ...
Looking for super-Earths in the HD 189733 system: a search for transits in MOST space-based photometry

Croll, Bryce; Matthews, Jaymie M.; Rowe, Jason F.; Gladman, Brett; Miller-Ricci, Eliza; Sasselov, Dimitar; Walker, Gordon A. H.; Kuschnig, Rainer; Lin, Douglas N. C.; Guenther, David B. (American Astronomical Society, 2007-12-20)

We have made a comprehensive transit search for exoplanets down to [similar or equal to]1.5-2 Earth radii in the HD 189733 system, based on 21 days of nearly uninterrupted broadband optical photometry obtained with the ...
MOST photometry and DDO spectroscopy of the eclipsing (white dwarf + red dwarf) binary V471 Tau

Guenther, David B.; Kaminski, Krzysztof Z.; Rucinski, Slavek M.; Matthews, Jaymie M.; Kuschnig, Rainer; Rowe, Jason F.; Moffat, Anthony F. J.; Sasselov, Dimitar; Walker, Gordon A. H.; Weiss, Werner W. (American Astronomical Society, 2007-09)

The Hyades K2 V + WD system 471 Tau is a prototype post-common envelope system and a likely cataclysmic binary progenitor. We present 10 days of nearly continuous optical photometry by the MOST (Microvariability and ...
MOST space-based photometry of the transiting exoplanet system HD 189733: precise timing measurements for transits across an active star

Guenther, David B.; Miller-Ricci, Eliza; Rowe, Jason F.; Sasselov, Dimitar; Matthews, Jaymie M.; Kuschnig, Rainer; Croll, Bryce; Moffat, Anthony F. J.; Rucinski, Slavek M.; Walker, Gordon A. H. (American Astronomical SocietyIOP Publishing, 2008-07-20)

We have measured transit times for HD 189733b passing in front of its bright (V = 7.67), chromospherically active, and spotted parent star. Nearly continuous broadband optical photometry of this system was obtained with ...
MOST space-based photometry of the transiting exoplanet system HD 209458: transit timing to search for additional planets

Guenther, David B.; Miller-Ricci, Eliza; Rowe, Jason F.; Sasselov, Dimitar; Matthews, Jaymie M.; Kuschnig, Rainer; Moffat, Anthony F. J.; Rucinski, Slavek M.; Walker, Gordon A. H.; Weiss, Werner W. (American Astronomical SocietyIOP Publishing, 2008-07-20)

We report on the measurement of transit times for the HD 209458 planetary system from photometry obtained with the MOST (Microvariability and Oscillations of Stars) space telescope. Deviations from a constant orbital period ...