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17 papers · 1 filter
Planetary Radii across Five Orders of Magnitude in Mass and Stellar Insolation: Application to Transits
Jonathan J. Fortney, Mark S. Marley, Jason W. Barnes
To aid in the physical interpretation of planetary radii constrained through observations of transiting planets, or eventually direct detections, we compute model radii of pure hyd…
Physical parameters of two very cool T dwarfs
D. Saumon, M. S. Marley, S. K. Leggett +8
We present new infrared spectra of the T8 brown dwarf 2MASS J04151954-0935066: 2.9-4.1 micron spectra obtained with the Infrared Camera and Spectrograph on the Subaru Telescope, an…
Discovery of Two T Dwarf Companions with the Spitzer Space Telescope
K. L. Luhman, B. M. Patten, M. Marengo +12
We report the discovery of T dwarf companions to the nearby stars HN Peg (G0V, 18.4 pc, ~0.3 Gyr) and HD 3651 (K0V, 11.1 pc, ~7 Gyr). During an ongoing survey of 5'x5' fields surro…
ISO Mid-Infrared Spectroscopy of Galactic Bulge AGB Stars
Joris A. D. L. Blommaert, Martin A. T. Groenewegen, Koryo Okumura +8
To study the nature of Bulge AGB stars and in particular their circumstellar dust, we have analysed mid-infrared spectra obtained with the ISOCAM CVF spectrometer in three Bulge fi…
The Spitzer-IRS spectrum of SMP LMC 11
J. Bernard-Salas, E. Peeters, G. C. Sloan +3
We present the first mid-infrared spectra of SMP LMC 11 in the Large Magellanic Cloud. While this object resembles a planetary nebula in the optical, its infrared properties are mo…
A Re-appraisal of the Habitability of Planets Around M Dwarf Stars
Jill C. Tarter, Peter R. Backus, Rocco L. Mancinelli +29
Stable, hydrogen-burning, M dwarf stars comprise about 75% of all stars in the Galaxy. They are extremely long-lived and because they are much smaller in mass than the Sun (between…