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Escaping atmospheres of extrasolar planets
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Brogi, Matteo (2018) Escaping atmospheres of extrasolar planets. Science, 362 (6421). pp. 1360-1361. doi:10.1126/science.aav7010
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Official URL: https://doi.org/10.1126/science.aav7010
Abstract
The atmospheres of planets orbiting other stars (exoplanets) are windows into their chemical composition and physical properties. For a planet that orbits closely to its star, the intense stellar irradiation can induce substantial atmospheric loss, a phenomenon that can be detected if the planet is transiting through an excess absorption of starlight by gas that is escaping the planet's atmosphere. On pages 1384 and 1388 of this issue, Allart et al. (1) and Nortmann et al. (2), respectively, report two independent measurements of planetary helium with remote, ground-based spectroscopy in the near-infrared. Their findings mark the first time that helium is detected from the ground and is unambiguously associated with the planet's orbital motion. The high spectral resolution of the observations allows direct tracking of helium's velocity and verifies that it trails the planet along its orbit.
Item Type: | Journal Item | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Science | ||||
Publisher: | American Association for the Advancement of Science | ||||
ISSN: | 0036-8075 | ||||
Official Date: | 21 December 2018 | ||||
Dates: |
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Volume: | 362 | ||||
Number: | 6421 | ||||
Page Range: | pp. 1360-1361 | ||||
DOI: | 10.1126/science.aav7010 | ||||
Status: | Not Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Copyright Holders: | © 2018, American Association for the Advancement of Science |
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