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The mass of planet GJ676A b from ground-based astrometry: A planetary system with two mature gas giants suitable for direct imaging
J. Sahlmann, P. F. Lazorenko, D. Ségransan +10
GJ676A is an M0 dwarf hosting both gas-giant and super-Earth-type planets discovered with radial-velocity measurements. Using FORS2/VLT, we obtained position measurements of the st…
Precise radial velocities of giant stars IX. HD 59686 Ab: a massive circumstellar planet orbiting a giant star in a ~13.6 au eccentric binary system
Mauricio Ortiz, Sabine Reffert, Trifon Trifonov +11
Context: For over 12 yr, we have carried out a precise radial velocity survey of a sample of 373 G and K giant stars using the Hamilton Échelle Spectrograph at Lick Observatory. Th…
Characterization of the Companion to Her
Lewis C. Roberts, Brian D. Mason, Jonathan Aguilar +24
Her is a nearby quadruple system with a G-subgiant primary and several low mass companions arranged in a 2+2 architecture. While the BC components have been well characterized,…
Shaped Pupil Lyot Coronagraphs: High-Contrast Solutions for Restricted Focal Planes
Neil T. Zimmerman, A J Eldorado Riggs, N. Jeremy Kasdin +2
Coronagraphs of the apodized pupil and shaped pupil varieties use the Fraunhofer diffraction properties of amplitude masks to create regions of high contrast in the vicinity of a t…
Radio Emission from Red-Giant Hot Jupiters
Yuka Fujii, David S. Spiegel, Tony Mroczkowski +5
When planet-hosting stars evolve off the main sequence and go through the red-giant branch, the stars become orders of magnitudes more luminous and, at the same time, lose mass at…