Detection of an Extrasolar Planet Atmosphere

  title={Detection of an Extrasolar Planet Atmosphere},
  author={David Charbonneau and Timothy M. Brown and Robert W. Noyes and Ronald L. Gilliland},
  journal={The Astrophysical Journal},
  pages={377 - 384}
We report high-precision spectrophotometric observations of four planetary transits of HD 209458, in the region of the sodium resonance doublet at 589.3 nm. We find that the photometric dimming during transit in a bandpass centered on the sodium feature is deeper by (2.32 ± 0.57) × 10-4 relative to simultaneous observations of the transit in adjacent bands. We interpret this additional dimming as absorption from sodium in the planetary atmosphere, as recently predicted from several theoretical… 

Identification of Absorption Features in an Extrasolar Planet Atmosphere

Water absorption is identified in the atmosphere of HD 209458b by comparing models for the planet's transmitted spectrum to recent, multiwavelength, eclipse-depth measurements (from 0.3 to 1 μm)

On the Indirect Detection of Sodium in the Atmosphere of the Planetary Companion to HD 209458

Using a self-consistent atmosphere code, we construct a new model of the atmosphere of the transiting extrasolar giant planet HD 209458b to investigate the disparity between the observed strength of

HST-COS observations of the transiting extrasolar planetary system HD 209458b

We summarize results from deep spectroscopic observations of the HD 209458 planetary system, carried out with the Hubble SpaceTelescope—Cosmic Origins Spectrograph. Orbitally resolved observations

An extended upper atmosphere around the extrasolar planet HD209458b

The detection of atomic hydrogen absorption in the stellar Lyman α line during three transits of HD209458b is reported, showing that this absorption should take place beyond the Roche limit and therefore can be understood in terms of escaping hydrogen atoms.

Magnesium in the atmosphere of the planet HD 209458 b: observations of the thermosphere-exosphere transition region

The planet HD 209458 b is one of the most well studied hot-Jupiter exoplanets. The upper atmosphere of this planet has been observed through ultraviolet/optical transit observations with H I

Detection of Thermal Emission from an Extrasolar Planet

We present Spitzer Space Telescope infrared photometric time series of the transiting extrasolar planet system TrES-1. The data span a predicted time of secondary eclipse, corresponding to the

Sodium Absorption from the Exoplanetary Atmosphere of HD 189733b Detected in the Optical Transmission Spectrum

We present the first ground-based detection of sodium absorption in the transmission spectrum of an extrasolar planet. Absorption due to the atmosphere of the extrasolar planet HD 189733b is detected

Detection of sodium absorption in WASP-17b with Magellan

We present the detection of sodium absorption in the atmosphere of the extrasolar planet WASP-17b, an inflated ‘hot Jupiter’ in a tight orbit around an F6 dwarf. In-transit observations of WASP-17

Transmission spectroscopy of the inflated exoplanet WASP-52b, and evidence for a bright region on the stellar surface

We have measured the transmission spectrum of the extremely inflated hot Jupiter WASP-52b using simultaneous photometric observations in Sloan Digital Sky Survey u΄, g΄ and a filter centred on the

A Search for CO Absorption in the Transmission Spectrum of HD 209458b

We observed one transit of the extrasolar planet HD 209458b with the NIRSPEC spectrograph on the Keck II telescope. Using time series of low‐noise observations in the wavelength range 2.0–2.5 μm, we



Theory of Extrasolar Giant Planet Transits

We present a synthesis of physical effects influencing the observed light curve of an extrasolar giant planet (EGP) transiting its host star. The synthesis includes a treatment of Rayleigh

Theoretical Transmission Spectra during Extrasolar Giant Planet Transits

The recent transit observation of HD 209458 b—an extrasolar planet orbiting a Sun-like star—confirmed that it is a gas giant and determined that its orbital inclination is 85°. This inclination makes

Multicolor Observations of a Planetary Transit of HD 209458

We present BVRIZ photometric observations of HD 209458 during the transit by its planetary companion on UT 1999 November 15 with the University of Hawaii 0.6 and 2.2 m telescopes and the High

Detection of Planetary Transits Across a Sun-like Star

High-precision, high-cadence photometric measurements of the star HD 209458 are reported, which is known from radial velocity measurements to have a planetary-mass companion in a close orbit and the detailed shape of the transit curve due to both the limb darkening of thestar and the finite size of the planet is clearly evident.

Extrasolar Giant Planets under Strong Stellar Irradiation

We investigate irradiation of extrasolar giant planets (EGPs) by treating the radiative transfer in detail, so that the flux from the parent star interacts with all relevant depths of the planetary

Photometric Light Curves and Polarization of Close-in Extrasolar Giant Planets

The close-in extrasolar giant planets (CEGPs), ≲0.05 AU from their parent stars, may have a large component of optically reflected light. We present theoretical optical photometric light curves and

Spectrophotometry of the Jovian Planets and Titan at 300- to 1000-nm Wavelength: The Methane Spectrum

Abstract Full-disk albedo spectra of the jovian planets and Titan were derived from observations at the European Southern Observatory in July 1993. The spectra extend from 300- to 1000-nm wavelength

The Vulcan Photometer: A Dedicated Photometer for Extrasolar Planet Searches

A small CCD photometer dedicated to the detection of extrasolar planets has been developed and put into operation at Mount Hamilton, California. It simultaneously monitors 6000 stars brighter than

Probable detection of starlight reflected from the giant planet orbiting τ Boötis

In the four years following the discovery of a planet orbiting the star 51 Pegasi, about 20 other planets have been detected through their influence on the radial velocities of lines in the stellar