Bibliographic Details
| Title: |
The PEPSI Exoplanet Transit Survey. III: The detection of FeI, CrI and TiI in the atmosphere of MASCARA-1 b through high-resolution emission spectroscopy |
| Authors: |
Scandariato, G., Borsa, F., Bonomo, A. S., Gaudi, B. S., Henning, Th., Ilyin, I., Johnson, M. C., Malavolta, L., Mallonn, M., Molaverdikhani, K., Nascimbeni, V., Patience, J., Pino, L., Poppenhaeger, K., Schlawin, E., Shkolnik, E. L., Sicilia, D., Sozzetti, A., Strassmeier, K. G., Veillet, C., Wang, J., Yan, F. |
| Source: |
A&A 674, A58 (2023) |
| Publication Year: |
2023 |
| Collection: |
Astrophysics |
| Subject Terms: |
Astrophysics - Earth and Planetary Astrophysics |
| More Details: |
Hot giant planets like MASCARA-1 b are expected to have thermally inverted atmospheres, that makes them perfect laboratory for the atmospheric characterization through high-resolution spectroscopy. Nonetheless, previous attempts of detecting the atmosphere of MASCARA-1 b in transmission have led to negative results. In this paper we aim at the detection of the optical emission spectrum of MASCARA-1 b. We used the high-resolution spectrograph PEPSI to observe MASCARA-1 (spectral type A8) near the secondary eclipse of the planet. We cross-correlated the spectra with synthetic templates computed for several atomic and molecular species. We obtained the detection of FeI, CrI and TiI in the atmosphere of MASCARA-1 b with a S/N ~7, 4 and 5 respectively, and confirmed the expected systemic velocity of ~13 km/s and the radial velocity semi-amplitude of MASCARA-1 b of ~200 km/s. The detection of Ti is of particular importance in the context of the recently proposed Ti cold-trapping below a certain planetary equilibrium temperature. We confirm the presence of an the atmosphere around MASCARA-1 b through emission spectroscopy. We conclude that the atmospheric non detection in transmission spectroscopy is due to the high gravity of the planet and/or to the overlap between the planetary track and its Doppler shadow. |
| Document Type: |
Working Paper |
| DOI: |
10.1051/0004-6361/202245539 |
| Access URL: |
http://arxiv.org/abs/2304.03328 |
| Accession Number: |
edsarx.2304.03328 |
| Database: |
arXiv |
