Detection of sodium absorption in WASP-17b with Magellan
Article
Article Title | Detection of sodium absorption in WASP-17b with Magellan |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Zhou, G. (Author) and Bayliss, D. D. R. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 426 (3), pp. 2483-2488 |
Number of Pages | 6 |
Year | 2012 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1111/j.1365-2966.2012.21817.x |
Web Address (URL) | https://academic.oup.com/mnras/article/426/3/2483/989230 |
Abstract | 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 made with the Magellan Inamori Kyocera Echelle (MIKE) spectrograph on the 6.5-m Magellan Telescope were analysed for excess planetary atmospheric absorption in the Nai D doublet spectral region. Using the interstellar sodium absorption lines as reference, we detect a 0.58 +/- 0.13 per cent transit signal, with 4.5s confidence, at 1.5 angstrom bandwidth around the stellar sodium absorption feature. This result is consistent with the previous Very Large Telescope detection of sodium in WASP-17b, confirming that the planet has a highly inflated atmosphere. |
Keywords | methods: observational; techniques: spectroscopic; planets and; satellites: atmospheres; planets and satellites: individual: WASP-17b; stars: individual: WASP-17; planetary systems; Astrophysics - Earth and; Planetary Astrophysics |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2012 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Byline Affiliations | Australian National University |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6x75/detection-of-sodium-absorption-in-wasp-17b-with-magellan
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