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The signature of orbital motion from the dayside of the planet ? Boötis b.

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Title: The signature of orbital motion from the dayside of the planet ? Boötis b.
Authors: Brogi, Matteo, Snellen, Ignas A. G., de Kok, Remco J., Albrecht, Simon, Birkby, Jayne, de Mooij, Ernst J. W.
Source: Nature. 6/28/2012, Vol. 486 Issue 7404, p502-504. 3p. 3 Graphs.
Subjects: Extrasolar planetary orbits, Carbon monoxide, Atmospheres of extrasolar planets, Temperature inversions, Ultraviolet radiation
Abstract: The giant planet orbiting ? Boötis (named ? Boötis b) was amongst the first extrasolar planets to be discovered. It is one of the brightest exoplanets and one of the nearest to us, with an orbital period of just a few days. Over the course of more than a decade, measurements of its orbital inclination have been announced and refuted, and have hitherto remained elusive. Here we report the detection of carbon monoxide absorption in the thermal dayside spectrum of ? Boötis b. At a spectral resolution of ?100,000, we trace the change in the radial velocity of the planet over a large range in phase, determining an orbital inclination of 44.5°?±?1.5° and a mass 5.95?±?0.28 times that of Jupiter, demonstrating that atmospheric characterization is possible for non-transiting planets. The strong absorption signal points to an atmosphere with a temperature that is decreasing towards higher altitudes, in contrast to the temperature inversion inferred for other highly irradiated planets. This supports the hypothesis that the absorbing compounds believed to cause such atmospheric inversions are destroyed in ? Boötis b by the ultraviolet emission from the active host star. [ABSTRACT FROM AUTHOR]
Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: The signature of orbital motion from the dayside of the planet ? Boötis b.
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  Data: <searchLink fieldCode="DE" term="%22Extrasolar+planetary+orbits%22">Extrasolar planetary orbits</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+monoxide%22">Carbon monoxide</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheres+of+extrasolar+planets%22">Atmospheres of extrasolar planets</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+inversions%22">Temperature inversions</searchLink><br /><searchLink fieldCode="DE" term="%22Ultraviolet+radiation%22">Ultraviolet radiation</searchLink>
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  Data: The giant planet orbiting ? Boötis (named ? Boötis b) was amongst the first extrasolar planets to be discovered. It is one of the brightest exoplanets and one of the nearest to us, with an orbital period of just a few days. Over the course of more than a decade, measurements of its orbital inclination have been announced and refuted, and have hitherto remained elusive. Here we report the detection of carbon monoxide absorption in the thermal dayside spectrum of ? Boötis b. At a spectral resolution of ?100,000, we trace the change in the radial velocity of the planet over a large range in phase, determining an orbital inclination of 44.5°?±?1.5° and a mass 5.95?±?0.28 times that of Jupiter, demonstrating that atmospheric characterization is possible for non-transiting planets. The strong absorption signal points to an atmosphere with a temperature that is decreasing towards higher altitudes, in contrast to the temperature inversion inferred for other highly irradiated planets. This supports the hypothesis that the absorbing compounds believed to cause such atmospheric inversions are destroyed in ? Boötis b by the ultraviolet emission from the active host star. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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