2020A&A...641L...7S


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.05CET01:20:22

2020A&A...641L...7S - Astronomy and Astrophysics, volume 641, L7-7 (2020/9-1)

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., LENDL M., LINDER E., WYTTENBACH A., ASTUDILLO-DEFRU N., BAYLISS D., CEGLA H.M., HENG K., LAVIE B., LOVIS C., MELO C., PEPE F., DOS SANTOS L.A., SEGRANSAN D. and UDRY S.

Abstract (from CDS):

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±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.

Abstract Copyright: © ESO 2020

Journal keyword(s): planetary systems - planets and satellites: atmospheres - planets and satellites: individual: WASP-166b - techniques: spectroscopic - instrumentation: spectrographs - methods: observational

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 BD+01 316b Pl 01 46 31.8576707085 +02 42 02.033178181           ~ 57 0
2 HD 21749b Pl 03 26 59.2228715011 -63 29 56.761818941           ~ 17 0
3 BD-20 2976 PM* 09 39 30.0860882657 -20 58 56.877954895   9.94 9.35     ~ 6 0
4 BD-20 2976b Pl 09 39 30.0860882657 -20 58 56.877954895           ~ 7 0

    Equat.    Gal    SGal    Ecl

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2020.12.05-01:20:22

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