Idioma:

Ionized calcium in the atmospheres of two ultra-hot exoplanets WASP-33b and KELT-9b

Yan, F. ; Casasayas-Barris, N. ; Molaverdikhani, K. ; Alonso-Floriano, F. J. ; Reiners, A. ; Pallé, E. ; Henning, Th ; Mollière, P. ; Chen, G. ; Nortmann, L. ; Snellen, I. A. G. ; Ribas, I. ; Quirrenbach, A. ; Caballero, J. A. ; Amado, P. J. ; Azzaro, M. ; Bauer, F. F. ; Cortés Contreras, M. ; Czesla, S. ; Khalafinejad, S. ; Lara, L. M. ; López-Puertas, M. ; Montes, D. ; Nagel, E. ; Oshagh, M. ; Sánchez-López, A. ; Stangret, M. ; Zechmeister, M.

Astronomy and astrophysics (Berlin), 2019-12, Vol.632, p.A69 [Periódico revisado por pares]

Heidelberg: EDP Sciences

Texto completo disponível

Citações Citado por

Enviar para

Título:
Ionized calcium in the atmospheres of two ultra-hot exoplanets WASP-33b and KELT-9b
Autor: Yan, F. ; Casasayas-Barris, N. ; Molaverdikhani, K. ; Alonso-Floriano, F. J. ; Reiners, A. ; Pallé, E. ; Henning, Th ; Mollière, P. ; Chen, G. ; Nortmann, L. ; Snellen, I. A. G. ; Ribas, I. ; Quirrenbach, A. ; Caballero, J. A. ; Amado, P. J. ; Azzaro, M. ; Bauer, F. F. ; Cortés Contreras, M. ; Czesla, S. ; Khalafinejad, S. ; Lara, L. M. ; López-Puertas, M. ; Montes, D. ; Nagel, E. ; Oshagh, M. ; Sánchez-López, A. ; Stangret, M. ; Zechmeister, M.
Assuntos: Atmospheric models ; Calcium ; Chemical composition ; Confidence ; Extrasolar planets ; Gas giant planets ; K lines ; Line spectra ; Planetary atmospheres ; planets and satellites: atmospheres ; planets and satellites: individual: KELT-9b ; planets and satellites: individual: WASP-33b ; techniques: spectroscopic ; Upper atmosphere
É parte de: Astronomy and astrophysics (Berlin), 2019-12, Vol.632, p.A69
Notas: dkey:10.1051/0004-6361/201936396
istex:14860872B59830826F80986E754AD0459DE27B5E
e-mail: fei.yan@uni-goettingen.de
ark:/67375/80W-SBKVKQ71-C
publisher-ID:aa36396-19
href:https://www.aanda.org/articles/aa/abs/2019/12/aa36396-19/aa36396-19.html
The reduced transmission spectrum is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/632/A69
bibcode:2019A%26A...632A..69Y
Descrição: Ultra-hot Jupiters are emerging as a new class of exoplanets. Studying their chemical compositions and temperature structures will improve our understanding of their mass loss rate as well as their formation and evolution. We present the detection of ionized calcium in the two hottest giant exoplanets – KELT-9b and WASP-33b. By using transit datasets from CARMENES and HARPS-N observations, we achieved high-confidence-level detections of Ca II using the cross-correlation method. We further obtain the transmission spectra around the individual lines of the Ca II H&K doublet and the near-infrared triplet, and measure their line profiles. The Ca II H&K lines have an average line depth of 2.02 ± 0.17% (effective radius of 1.56 Rp) for WASP-33b and an average line depth of 0.78 ± 0.04% (effective radius of 1.47 Rp) for KELT-9b, which indicates that the absorptions are from very high upper-atmosphere layers close to the planetary Roche lobes. The observed Ca II lines are significantly deeper than the predicted values from the hydrostatic models. Such a discrepancy is probably a result of hydrodynamic outflow that transports a significant amount of Ca II into the upper atmosphere. The prominent Ca II detection with the lack of significant Ca I detection implies that calcium is mostly ionized in the upper atmospheres of the two planets.
Editor: Heidelberg: EDP Sciences
Idioma: Inglês

Voltar para lista de resultados

Anterior Resultado 9 Avançar Ir para próxima página

Realização: Logos de Redes Sociais:

Ionized calcium in the atmospheres of two ultra-hot exoplanets WASP-33b and KELT-9b

Heidelberg: EDP Sciences

Buscando em bases de dados remotas. Favor aguardar.