The signature of hot hydrogen in the atmosphere of the extrasolar planet HD 209458b

@article{Ballester2007TheSO,
  title={The signature of hot hydrogen in the atmosphere of the extrasolar planet HD 209458b},
  author={Gilda E Ballester and David K. Sing and Floyd Leigh Herbert},
  journal={Nature},
  year={2007},
  volume={445},
  pages={511-514}
}
About ten per cent of the known extrasolar planets are gas giants that orbit very close to their parent stars. The atmospheres of these ‘hot Jupiters’ are heated by the immense stellar irradiation. In the case of the planet HD 209458b, this energy deposition results in a hydrodynamic state in the upper atmosphere, allowing for sizeable expansion and escape of neutral hydrogen gas. HD 209458b was the first extrasolar planet discovered that transits in front of its parent star. The size of the… Expand

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References

SHOWING 1-10 OF 18 REFERENCES
An extended upper atmosphere around the extrasolar planet HD209458b
TLDR
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. Expand
Atmospheric escape from hot Jupiters
The extra-solar planet HD209458b has been found to have an extended atmosphere of escaping atomic hydrogen (Vidal-Madjar et al. 2003), suggesting that "hot Jupiters" closer to their parent starsExpand
Aeronomy of extra-solar giant planets at small orbital distances
Abstract One-dimensional aeronomical calculations of the atmospheric structure of extra-solar giant planets in orbits with semi-major axes from 0.01 to 0.1 AU show that the thermospheres are heatedExpand
Detection of an Extrasolar Planet Atmosphere
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 dimmingExpand
Detection of oxygen and carbon in the upper atmosphere of the extrasolar planet HD209458b
Four transits of the planet orbiting the star HD209458 were observed with the STIS spectrograph on board HST. The wavelength domain (1180-1710A) includes HI as well as CI, CII, CIV, NV, OI, SI, SiII,Expand
Infrared radiation from an extrasolar planet
predictions of the black-hole growth of SMGs and quasars. What was the catalyst for the rapid black-hole and stellar growth seen in SMGs? Rest-frame ultraviolet images taken by the Hubble SpaceExpand
A Transiting "51 Peg-like" Planet.
Doppler measurements from Keck exhibit a sinusoidal periodicity in the velocities of the G0 dwarf HD 209458, having a semiamplitude of 81 m s-1 and a period of 3.5239 days, which is indicative of aExpand
Hubble Space Telescope Time-Series Photometry of the Transiting Planet of HD?209458
We have observed four transits of the planet of HD 209458 using the STIS spectrograph on the Hubble Space Telescope (HST). Summing the recorded counts over wavelength between 582 and 638 nm yields aExpand
Using Stellar Limb-Darkening to Refine the Properties of HD 209458b
We use multiband photometry to refine estimates for the planetary radius and orbital inclination of the transiting planet system HD 209458. We gathered 1066 spectra over four distinct transits withExpand
A new non-linear limb-darkening law for LTE stellar atmosphere models III
Continuing our studies on stellar atmospheres (Claret 2000, 2004), we present in this paper the limb-darkening coefficients for the Sloan photometric system. The calculations cover a wide range ofExpand
...
1
2
...