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19912026
Showing 2012 · astro-ph.EPShow all

7 papers · 2 filters

astro-ph.EP2012★ 33 cited

A search for transits of GJ 581\lowercase{e} and characterization of the host star variability using MOST space telescope photometry

Diana Dragomir, Jaymie M. Matthews, Rainer Kuschnig +7

The GJ 581 system has been amply studied since its discovery in 2005: the number of known planets in the system has increased and their orbital parameters are among the most precis…

astro-ph.EP2012★ 144 cited

Spitzer 3.6 micron and 4.5 micron full-orbit lightcurves of WASP-18

P. F. L. Maxted, D. R. Anderson, A. P. Doyle +7

We present new lightcurves of the massive hot Jupiter system WASP-18 obtained with the Spitzer spacecraft covering the entire orbit at 3.6 micron and 4.5 micron. These lightcurves…

astro-ph.EP2012★ 85 cited

Fomalhaut b: Independent Analysis of the Hubble Space Telescope Public Archive Data

Raphael Galicher, Christian Marois, Ben Zuckerman +1

The nature and even the existence of a putative planet-mass companion ("Fomalhaut b") to Fomalhaut has been debated since 2008. In the present paper we reanalyze the multi-epoch AC…

astro-ph.EP2012★ 167 cited

The International Deep Planet Survey I. The frequency of wide-orbit massive planets around A-stars

A. Vigan, J. Patience, C. Marois +8

Breakthrough direct detections of planetary companions orbiting A-type stars confirm the existence of massive planets at relatively large separations, but dedicated surveys are req…

astro-ph.EP2012★ 30 cited

Non-detection of previously reported transits of HD 97658b with MOST photometry

Diana Dragomir, Jaymie M. Matthews, Andrew W. Howard +11

The radial velocity-discovered exoplanet HD 97658b was recently announced to transit, with a derived planetary radius of 2.93 \pm 0.28 R_{Earth}. As a transiting super-Earth orbiti…

astro-ph.EP2012★ 1 cited

Evolution of magnetic protection in potentially habitable terrestrial planets

Jorge I. Zuluaga, Pablo A. Cuartas, Jaime H. Hoyos

We present a model for the evolution of the magnetic properties of habitable terrestrial planets and their effects on the protection of planetary atmosphere against the erosive act…

astro-ph.EP2012★ 98 cited

Infrared Non-detection of Fomalhaut b -- Implications for the Planet Interpretation

Markus Janson, Joe Carson, David Lafreniere +3

The nearby A4-type star Fomalhaut hosts a debris belt in the form of an eccentric ring, which is thought to be caused by dynamical influence from a giant planet companion. In 2008,…