2020A&A...640A..29D


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.26CET14:47:14

2020A&A...640A..29D - Astronomy and Astrophysics, volume 640A, 29-29 (2020/8-1)

Search for helium in the upper atmosphere of the hot Jupiter WASP-127 b using Gemini/Phoenix.

DOS SANTOS L.A., EHRENREICH D., BOURRIER V., ALLART R., KING G., LENDL M., LOVIS C., MARGHEIM S., MELENDEZ J., SEIDEL J.V. and SOUSA S.G.

Abstract (from CDS):

Large-scale exoplanet search surveys have shown evidence that atmospheric escape is a ubiquitous process that shapes the evolution and demographics of planets. However, we lack a detailed understanding of this process because very few exoplanets that have been discovered to date could be probed for signatures of atmospheric escape. Recently, the metastable helium triplet at 1.083µm has been shown to be a viable window for the presence of He-rich escaping envelopes around short-period exoplanets. Our objective is to use, for the first time, the Phoenix spectrograph to search for helium in the upper atmosphere of the inflated hot Jupiter WASP-127 b. We observed one transit and reduced the data manually since no pipeline is available. We did not find a significant in-transit absorption signal indicative of the presence of helium around WASP-127 b, and we set a 90% confidence upper limit for excess absorption at 0.87% in a 0.75Å passband covering the He triplet. Given the large scale height of this planet, the lack of a detectable feature is likely due to unfavorable photoionization conditions for populating the metastable HeI triplet. This conclusion is supported by the inferred low coronal and chromospheric activity of the host star and the old age of the system, which result in a relatively mild high-energy environment around the planet.

Abstract Copyright: © ESO 2020

Journal keyword(s): planets and satellites: atmospheres - stars: individual: WASP-127 - techniques: spectroscopic

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 K2-100b Pl 08 38 24.3004849747 +20 06 21.828303951           ~ 20 0
2 BD-03 2978b Pl 10 42 14.0835894932 -03 50 06.259823354           ~ 25 0
3 BD-03 2978 * 10 42 14.0835894932 -03 50 06.259823354   10.809 10.172     G5 12 0
4 Ross 905b Pl 11 42 11.0933874353 +26 42 23.658083337           ~ 610 1
5 K2-235b Pl 12 33 32.8440958980 -10 08 46.223886777           ~ 54 0
6 WASP-107 PM* 12 33 32.8440958980 -10 08 46.223886777   14.62 11.47     K6 16 0
7 HD 330075 PM* 15 49 37.6938243823 -49 57 48.677088732   10.23 9.33     G5 77 1
8 BD+47 2936b Pl 19 50 50.2474562793 +48 04 51.097364378           ~ 299 1
9 BD+47 2936 EB* 19 50 50.2474562793 +48 04 51.097364378       8.8   K4V 223 2
10 HD 189733b Pl 20 00 43.7130382888 +22 42 39.071811263           ~ 1105 1
11 HD 195689b Pl 20 31 26.3534038246 +39 56 19.765154336           ~ 101 0
12 BD-05 5432b Pl 21 00 06.1969250596 -05 05 40.037007561           ~ 45 1
13 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1504 1

    Equat.    Gal    SGal    Ecl

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2020.10.26-14:47:14

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