Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) : V. Detection of sodium on the bloated super-Neptune WASP-166b

Seidel, J. V. ; Ehrenreich, D. ; Bourrier, V. ; Allart, R. ; Attia, O. ; Hoeijmakers, H. J. LU ; Lendl, M. ; Linder, E. ; Wyttenbach, A. and Astudillo-Defru, N. , et al. (2020) In Astronomy and Astrophysics 641.
Abstract

Planet formation processes or evolution mechanisms are surmised to be at the origin of the hot Neptune desert. Studying exoplanets currently living within or at the edge of this desert could allow disentangling the respective roles of formation and evolution. We present the High Accuracy Radial velocity Planet Searcher (HARPS) transmission spectrum of the bloated super-Neptune WASP-166b, located at the outer rim of the Neptune desert. Neutral sodium is detected at the 3.4σ level (0.455†±â€ 0.135%), with a tentative indication of line broadening, which could be caused by winds blowing sodium farther into space, a possible manifestation of the bloated character of these highly irradiated worlds. We put this detection into context with... (More)

Planet formation processes or evolution mechanisms are surmised to be at the origin of the hot Neptune desert. Studying exoplanets currently living within or at the edge of this desert could allow disentangling the respective roles of formation and evolution. We present the High Accuracy Radial velocity Planet Searcher (HARPS) transmission spectrum of the bloated super-Neptune WASP-166b, located at the outer rim of the Neptune desert. Neutral sodium is detected at the 3.4σ level (0.455†±â€ 0.135%), with a tentative indication of line broadening, which could be caused by winds blowing sodium farther into space, a possible manifestation of the bloated character of these highly irradiated worlds. We put this detection into context with previous work claiming a non-detection of sodium in the same observations and show that the high noise in the trace of the discarded stellar sodium lines was responsible for the non-detection. We highlight the impact of this low signal-to-noise ratio remnant on detections for exoplanets similar to WASP-166b.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and , et al. (More)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; and (Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Instrumentation: spectrographs, Methods: observational, Planetary systems, Planets and satellites: atmospheres, Planets and satellites: individual: WASP-166b, Techniques: spectroscopic
in
Astronomy and Astrophysics
volume
641
article number
L7
publisher
EDP Sciences
external identifiers
  • scopus:85091983467
ISSN
0004-6361
DOI
10.1051/0004-6361/202038497
language
English
LU publication?
yes
id
5713339f-01f2-41db-81de-e438a81eee08
date added to LUP
2020-11-03 06:48:37
date last changed
2024-04-17 18:13:23
@article{5713339f-01f2-41db-81de-e438a81eee08,
  abstract     = {{<p>Planet formation processes or evolution mechanisms are surmised to be at the origin of the hot Neptune desert. Studying exoplanets currently living within or at the edge of this desert could allow disentangling the respective roles of formation and evolution. We present the High Accuracy Radial velocity Planet Searcher (HARPS) transmission spectrum of the bloated super-Neptune WASP-166b, located at the outer rim of the Neptune desert. Neutral sodium is detected at the 3.4σ level (0.455†±â€ 0.135%), with a tentative indication of line broadening, which could be caused by winds blowing sodium farther into space, a possible manifestation of the bloated character of these highly irradiated worlds. We put this detection into context with previous work claiming a non-detection of sodium in the same observations and show that the high noise in the trace of the discarded stellar sodium lines was responsible for the non-detection. We highlight the impact of this low signal-to-noise ratio remnant on detections for exoplanets similar to WASP-166b.</p>}},
  author       = {{Seidel, J. V. and Ehrenreich, D. and Bourrier, V. and Allart, R. and Attia, O. and Hoeijmakers, H. J. and Lendl, M. and Linder, E. and Wyttenbach, A. and Astudillo-Defru, N. and Bayliss, D. and Cegla, H. M. and Heng, K. and Lavie, B. and Lovis, C. and Melo, C. and Pepe, F. and Dos Santos, L. A. and Ségransan, D. and Udry, S.}},
  issn         = {{0004-6361}},
  keywords     = {{Instrumentation: spectrographs; Methods: observational; Planetary systems; Planets and satellites: atmospheres; Planets and satellites: individual: WASP-166b; Techniques: spectroscopic}},
  language     = {{eng}},
  publisher    = {{EDP Sciences}},
  series       = {{Astronomy and Astrophysics}},
  title        = {{Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) : V. Detection of sodium on the bloated super-Neptune WASP-166b}},
  url          = {{http://dx.doi.org/10.1051/0004-6361/202038497}},
  doi          = {{10.1051/0004-6361/202038497}},
  volume       = {{641}},
  year         = {{2020}},
}