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31 papers · 1 filter
Evidence of a massive planet candidate orbiting the young active K5V star BD+20 1790
M. Hernán-Obispo, M. C. Gálvez-Ortiz, G. Anglada-Escudé +4
BD+20 1790 is a young active, metal-rich, late-type K5Ve star. We have undertaken a study of stellar activity and kinematics for this star over the past few years. Previous results…
Parallactic Motion for Companion Discovery: An M-Dwarf Orbiting Alcor
Neil Zimmerman, Ben R. Oppenheimer, Sasha Hinkley +16
The A5V star Alcor has an M3-M4 dwarf companion, as evidenced by a novel astrometric technique. Imaging spectroscopy combined with adaptive optics coronagraphy allowed for the dete…
Limb-darkening measurements for a cool red giant in microlensing event OGLE 2004-BLG-482
M. Zub, A. Cassan, D. Heyrovsky +47
Aims: We present a detailed analysis of OGLE 2004-BLG-482, a relatively high-magnification single-lens microlensing event which exhibits clear extended-source effects. These events…
Constraints on Secondary Eclipse Probabilities of Long-Period Exoplanets from Orbital Elements
Kaspar von Braun, Stephen R. Kane
Long-period transiting exoplanets provide an opportunity to study the mass-radius relation and internal structure of extrasolar planets. Their studies grant insights into planetary…
The Taurus Spitzer Survey: New Candidate Taurus Members Selected Using Sensitive Mid-Infrared Photometry
L. M. Rebull, D. L. Padgett, C. -E. McCabe +31
We report on the properties of pre-main-sequence objects in the Taurus molecular clouds as observed in 7 mid- and far-infrared bands with the Spitzer Space Telescope. There are 215…
Starspot Jitter in Photometry, Astrometry and Radial Velocity Measurements
V. V. Makarov, C. A. Beichman, J. H. Catanzarite +4
Analytical relations are derived for the amplitude of astrometric, photometric and radial velocity perturbations caused by a single rotating spot. The relative power of the star sp…