2020A&A...641A.120H


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.05CET00:44:10

2020A&A...641A.120H - Astronomy and Astrophysics, volume 641A, 120-120 (2020/9-1)

High-resolution transmission spectroscopy of MASCARA-2 b with EXPRES.

HOEIJMAKERS H.J., CABOT S.H.C., ZHAO L., BUCHHAVE L.A., TRONSGAARD R., DAVIS A.B., KITZMANN D., GRIMM S.L., CEGLA H.M., BOURRIER V., EHRENREICH D., HENG K., LOVIS C. and FISCHER D.A.

Abstract (from CDS):

We report detections of atomic species in the atmosphere of MASCARA-2 b, using the first transit observations obtained with the newly commissioned EXPRES spectrograph. EXPRES is a highly stabilized optical echelle spectrograph, designed to detect stellar reflex motions with amplitudes down to 30cm/s, and has recently been deployed at the Lowell Discovery Telescope. By analyzing the transmission spectrum of the ultra-hot Jupiter MASCARA-2 b using the cross-correlation method, we confirm previous detections of FeI, FeII, and NaI, which likely originate in the upper regions of the inflated atmosphere.In addition, we report significant detections of MgI and CrII. The absorption strengths change slightly with time, possibly indicating different temperatures and chemistry in the day- and nightside terminators. Using the effective stellar line-shape variation induced by the transiting planet, we constrain the projected spin-orbit misalignment of the system to 1.6±3.1 degrees, consistent with an aligned orbit. We demonstrate that EXPRES joins a suite of instruments capable of phase-resolved spectroscopy of exoplanet atmospheres.

Abstract Copyright: © ESO 2020

Journal keyword(s): instrumentation: spectrographs - planets and satellites: atmospheres - techniques: spectroscopic - planets and satellites: gaseous planets

Simbad objects: 7

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Number of rows : 7

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 15082b Pl 02 26 51.0582746497 +37 33 01.737746137           ~ 208 1
3 CD-38 3220b Pl 07 10 24.0606039387 -39 05 50.570553937           ~ 120 0
4 HD 185603 * 19 38 38.7352870670 +31 13 09.215701765   7.67 7.58     A0 20 0
5 HD 185603b Pl 19 38 38.7352870670 +31 13 09.215701765           ~ 42 0
6 HD 195689b Pl 20 31 26.3534038246 +39 56 19.765154336           ~ 109 0
7 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1520 1

    Equat.    Gal    SGal    Ecl

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2020.12.05-00:44:10

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