Multiple water band detections in the CARMENES near-infrared transmission spectrum of HD 189733 b
Aims: We explore the capabilities of CARMENES for characterizing hot-Jupiter atmospheres by targeting multiple water bands, in particular, those at 1.15 and 1.4 $\mu$m. Hubble Space Telescope observations suggest that this wavelength region is relevant for distinguishing between hazy/cloudy and clea...
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| Main Authors: | , , , |
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| Format: | Article (Journal) Chapter/Article |
| Language: | English |
| Published: |
21 Nov 2018
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| In: |
Arxiv
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| Online Access: | Verlag, Volltext: http://arxiv.org/abs/1811.08901
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| Author Notes: | F.J. Alonso-Floriano, A. Sánchez-López, I.A.G. Snellen, M. López-Puertas, E. Nagel, P.J. Amado, F.F. Bauer, J.A. Caballero, S. Czesla, L. Nortmann, E. Pallé, M. Salz, A. Reiners, I. Ribas, A. Quirrenbach, J. Aceituno, G. Anglada-Escudé, V.J.S. Béjar, E. W. Guenther, T. Henning, A. Kaminski, M. Kürster, M. Lampón, L.M. Lara, D. Montes, J.C. Morales, L. Tal-Or, J.H.M.M. Schmitt, M.R. Zapatero Osorio, and M. Zechmeister |
| Summary: | Aims: We explore the capabilities of CARMENES for characterizing hot-Jupiter atmospheres by targeting multiple water bands, in particular, those at 1.15 and 1.4 $\mu$m. Hubble Space Telescope observations suggest that this wavelength region is relevant for distinguishing between hazy/cloudy and clear atmospheres. Methods: We observed one transit of the hot Jupiter HD 189733 b with CARMENES. Telluric and stellar absorption lines were removed using Sysrem, which performs a principal component analysis including proper error propagation. The residual spectra were analysed for water absorption with cross-correlation techniques using synthetic atmospheric absorption models. Results: We report a cross-correlation peak at a signal-to-noise ratio (SNR) of 6.6, revealing the presence of water in the transmission spectrum of HD 189733 b. The absorption signal appeared slightly blueshifted at -3.9 $\pm$ 1.3 kms$^{-1}$. We measured the individual cross-correlation signals of the water bands at 1.15 and 1.4 $\mu$m, finding cross-correlation peaks at SNRs of 4.9 and 4.4, respectively. The 1.4 $\m |
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| Item Description: | Gesehen am 20.10.2020 |
| Physical Description: | Online Resource |