| Online-Ressource |
Verfasst von: | Pallé, Enric [VerfasserIn]  |
| Nortmann, L. [VerfasserIn]  |
| Casasayas-Barris, N. [VerfasserIn]  |
| Lampon, M. [VerfasserIn]  |
| Lopez-Puertas, M. [VerfasserIn]  |
| Caballero, J. A. [VerfasserIn]  |
| Sanz-Forcada, J. [VerfasserIn]  |
| Lara, L. M. [VerfasserIn]  |
| Nagel, E. [VerfasserIn]  |
| Yan, F. [VerfasserIn]  |
| Alonso-Floriano, F. J. [VerfasserIn]  |
| Amado, P. J. [VerfasserIn]  |
| Chen, G. [VerfasserIn]  |
| Cifuentes, C. [VerfasserIn]  |
| Cortes-Contreras, M. [VerfasserIn]  |
| Czesla, S. [VerfasserIn]  |
| Molaverdikhani, K. [VerfasserIn]  |
| Montes, D. [VerfasserIn]  |
| Passegger, V. M. [VerfasserIn]  |
| Quirrenbach, Andreas [VerfasserIn]  |
| Reiners, A. [VerfasserIn]  |
| Ribas, I. [VerfasserIn]  |
| Sanchez-Lopez, A. [VerfasserIn]  |
| Schweitzer, A. [VerfasserIn]  |
| Stangret, M. [VerfasserIn]  |
| Zapatero Osorio, M. R. [VerfasserIn]  |
| Zechmeister, M. [VerfasserIn]  |
Titel: | A He I upper atmosphere around the warm Neptune GJ 3470 b |
Verf.angabe: | E. Palle, L. Nortmann, N. Casasayas-Barris, M. Lampon, M. Lopez-Puertas, J. A. Caballero, J. Sanz-Forcada, L. M. Lara, E. Nagel, F. Yan, F. J. Alonso-Floriano, P. J. Amado, G. Chen, C. Cifuentes, M. Cortes-Contreras, S. Czesla, K. Molaverdikhani, D. Montes, V. M. Passegger, A. Quirrenbach, A. Reiners, I. Ribas, A. Sanchez-Lopez, A. Schweitzer, M. Stangret, M. R. Zapatero Osorio, and M. Zechmeister |
E-Jahr: | 2020 |
Jahr: | 11 June 2020 |
Umfang: | 9 S. |
Teil: | volume:638 |
| year:2020 |
| extent:9 |
Fussnoten: | Gesehen am 16.04.2021 |
Titel Quelle: | Enthalten in: Astronomy and astrophysics |
Ort Quelle: | Les Ulis : EDP Sciences, 1969 |
Jahr Quelle: | 2020 |
Band/Heft Quelle: | 638(2020) Artikel-Nummer A61, 9 Seiten |
ISSN Quelle: | 1432-0746 |
Abstract: | High resolution transit spectroscopy has proven to be a reliable technique for the characterization of the chemical composition of exoplanet atmospheres. Taking advantage of the broad spectral coverage of the CARMENES spectrograph, we initiated a survey aimed at characterizing a broad range of planetary systems. Here, we report our observations of three transits of GJ 3470 b with CARMENES in search of He (2(3)S) absorption. On one of the nights, the He I region was heavily contaminated by OH(-)telluric emission and, thus, it was not useful for our purposes. The remaining two nights had a very different signal-to-noise ratio (S/N) due to weather. They both indicate the presence of He (2(3)S) absorption in the transmission spectrum of GJ 3470 b, although a statistically valid detection can only be claimed for the night with higher S/N. For that night, we retrieved a 1.5 +/- 0.3% absorption depth, translating into aR(p)(lambda)/R-p= 1.15 +/- 0.14 at this wavelength. Spectro-photometric light curves for this same night also indicate the presence of extra absorption during the planetary transit with a consistent absorption depth. The He (2(3)S) absorption is modeled in detail using a radiative transfer code, and the results of our modeling efforts are compared to the observations. We find that the mass-loss rate, (M) over dot, is confined to a range of 3 x 10(10)g s(-1)forT= 6000 K to 10 x 10(10)g s(-1)forT= 9000 K. We discuss the physical mechanisms and implications of the HeIdetection in GJ 3470 b and put it in context as compared to similar detections and non-detections in other Neptune-size planets. We also present improved stellar and planetary parameter determinations based on our visible and near-infrared observations. |
DOI: | doi:10.1051/0004-6361/202037719 |
URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext: https://doi.org/10.1051/0004-6361/202037719 |
| DOI: https://doi.org/10.1051/0004-6361/202037719 |
Datenträger: | Online-Ressource |
Sprache: | eng |
Sach-SW: | absorption |
| atmospheres |
| exoplanets |
| general |
| GJ 3470b |
| high-resolution spectroscopy |
| individual |
| mass |
| parameters |
| planet-star interactions |
| planetary systems |
| planets and satellites |
| stars |
K10plus-PPN: | 1755138946 |
Verknüpfungen: | → Zeitschrift |
¬A¬ He I upper atmosphere around the warm Neptune GJ 3470 b / Pallé, Enric [VerfasserIn]; 11 June 2020 (Online-Ressource)