Characterization of the hot Neptune GJ 436 b withSpitzerand ground-based observations
نویسندگان
چکیده
منابع مشابه
Transit Infrared Spectroscopy of the Hot Neptune Around GJ 436 with the Hubble Space
The nearby transiting system GJ 436b offers a unique opportunity to probe the structure and atmosphere of an extra-solar “hot Neptune”. In this Letter, we present the main results of observations covering two transit events with the NICMOS camera on the Hubble Space Telescope. The data consist of high-cadence time series of grism spectra covering the 1.1-1.9 μm spectral range. We find Rpl = 4.0...
متن کاملTransit infrared spectroscopy of the hot Neptune around GJ 436 with the Hubble Space Telescope★
The nearby transiting system GJ 436b offers a unique opportunity to probe the structure and atmosphere of an extra-solar “hot Neptune”. In this Letter, we present the main results of observations covering two transit events with the NICMOS camera on the Hubble Space Telescope. The data consist in high-cadence time series of grism spectra covering the 1.1-1.9 μm spectral range. We find Rpl = 4.0...
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We determine stellar parameters for the M dwarf GJ 436 that hosts a Neptunemass planet. We employ primarily spectral modeling at low and high resolution, examining the agreement between model and observed optical spectra of five comparison stars of type, M0-M3. Modeling high resolution optical spectra suffers from uncertainties in TiO transitions, affecting the predicted strengths of both atomi...
متن کاملFirst Ground-Based Adaptive Optics Observations of Neptune and Proteus
High angular resolution (0.15”) K-band images of Neptune were obtained in August 1995, with the University-of-Hawaii adaptive optics system mounted on the 3.6-m Canada-France-Hawaii telescope. The images show bright high contrast features that are believed to be high altitude clouds. They confirm that low latitude (< 30 ̊) cloud activity has shifted since Voyager from the south hemisphere to the...
متن کاملTelescope transit light curve for GJ 436 b
We present time series photometry for six partial transits of GJ 436b obtained with the Fine Guidance Sensor instrument on the Hubble Space Telescope (HST). Our analysis of these data yields independent estimates of the host star's radius R ⋆ = 0.505
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2007
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20078354