Showing 2011 · astro-ph.EPShow all

6 papers · 2 filters

astro-ph.EP2011★ 57 cited

How do Most Planets Form? -- Constraints on Disk Instability from Direct Imaging

Markus Janson, Mariangela Bonavita, Hubert Klahr +1

Core accretion and disk instability have traditionally been regarded as the two competing possible paths of planet formation. In recent years, evidence have accumulated in favor of…

astro-ph.EP2011★ 133 cited

M-band Imaging of the HR 8799 Planetary System Using an Innovative LOCI-based Background Subtraction Technique

Raphael Galicher, Christian Marois, Bruce Macintosh +2

Multi-wavelength observations/spectroscopy of exoplanetary atmospheres are the basis of the emerging exciting field of comparative exoplanetology. The HR 8799 planetary system is a…

astro-ph.EP2011★ 121 cited

High-contrast Imaging Search for Planets and Brown Dwarfs around the Most Massive Stars in the Solar Neighborhood

Markus Janson, Mariangela Bonavita, Hubert Klahr +3

There has been a long-standing discussion in the literature as to whether core accretion or disk instability is the dominant mode of planet formation. Over the last decade, several…

astro-ph.EP2011★ 278 cited

A Super-Earth Transiting a Naked-Eye Star

Joshua N. Winn, Jaymie M. Matthews, Rebekah I. Dawson +11

We have detected transits of the innermost planet "e" orbiting 55 Cnc (V=6.0), based on two weeks of nearly continuous photometric monitoring with the MOST space telescope. The tra…

astro-ph.EP2011★ 123 cited

Broadband Transmission Spectroscopy of the super-Earth GJ 1214b suggests a Low Mean Molecular Weight Atmosphere

Bryce Croll, Loic Albert, Ray Jayawardhana +4

We used WIRCam on CFHT to observe four transits of the super-Earth GJ 1214b in the near-infrared. For each transit we observed in two bands nearly-simultaneously by rapidly switchi…

astro-ph.EP2011★ 63 cited

The Magnetic and Metallic Degenerate G77-50

J. Farihi, P. Dufour, R. Napiwotzki +1

An accumulation of multi-epoch, high-resolution, optical spectra reveal that the nearby star G77-50 is a very cool DAZ white dwarf externally polluted by Mg, Fe, Al, Ca, and possib…