The PEPSI Exoplanet Transit Survey (PETS) -V. New Na D transmission spectra indicate a quieter atmosphere on HD 189733b

E. Keles; S. Czesla; K. Poppenhaeger; P. Hauschildt; T. A. Carroll; I. Ilyin; M. Baratella; M. Steffen; K. G. Strassmeier; A. S. Bonomo; B. S. Gaudi; T. Henning; M. C. Johnson; K. Molaverdikhani; V. Nascimbeni; J. Patience; A. Reiners; G. Scandariato; E. Schlawin; E. Shkolnik; D. Sicilia; A. Sozzetti; M. Mallonn; C. Veillet; J. Wang; F. Yan

doi:10.1093/mnras/stae1097

The PEPSI Exoplanet Transit Survey (PETS) -V. New Na D transmission spectra indicate a quieter atmosphere on HD 189733b

E. Keles, S. Czesla, K. Poppenhaeger, P. Hauschildt, T. A. Carroll, I. Ilyin, M. Baratella, M. Steffen, K. G. Strassmeier, A. S. Bonomo, B. S. Gaudi, T. Henning, M. C. Johnson, K. Molaverdikhani, V. Nascimbeni, J. Patience, A. Reiners, G. Scandariato, E. Schlawin, E. ShkolnikD. Sicilia, A. Sozzetti, M. Mallonn, C. Veillet, J. Wang, F. Yan

Steward Observatory

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Absorption lines from exoplanet atmospheres observed in transmission allow us to study atmospheric characteristics such as winds. We present a new high-resolution transit time-series of HD 189733b, acquired with the PEPSI instrument at the LBT and analyse the transmission spectrum around the Na D lines. We model the spectral signature of the RM-CL V -effect using synthetic PHOENIX spectra based on spherical LTE atmospheric models. We find an Na D absorption signature between the second and third contact but not during the ingress and egress phases, which casts doubt on the planetary origin of the signal. Presupposing a planetary origin of the signal, the results suggest a weak day-to-nightside streaming wind in the order of 0.7 km s-1 and a moderate super-rotational streaming wind in the order of 3-4 km s-1, challenging claims of pre v ailing strong winds on HD 189733b.

Original language	English (US)
Pages (from-to)	4826-4838
Number of pages	13
Journal	Monthly Notices of the Royal Astronomical Society
Volume	530
Issue number	4
DOIs	https://doi.org/10.1093/mnras/stae1097
State	Published - Jun 1 2024

Keywords

line: profiles
planets and satellites: atmospheres
planets and satellites: gaseous planets
stars: activity
techniques: spectroscopic

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stae1097

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Keles, E., Czesla, S., Poppenhaeger, K., Hauschildt, P., Carroll, T. A., Ilyin, I., Baratella, M., Steffen, M., Strassmeier, K. G., Bonomo, A. S., Gaudi, B. S., Henning, T., Johnson, M. C., Molaverdikhani, K., Nascimbeni, V., Patience, J., Reiners, A., Scandariato, G., Schlawin, E., ... Yan, F. (2024). The PEPSI Exoplanet Transit Survey (PETS) -V. New Na D transmission spectra indicate a quieter atmosphere on HD 189733b. Monthly Notices of the Royal Astronomical Society, 530(4), 4826-4838. https://doi.org/10.1093/mnras/stae1097

Keles, E, Czesla, S, Poppenhaeger, K, Hauschildt, P, Carroll, TA, Ilyin, I, Baratella, M, Steffen, M, Strassmeier, KG, Bonomo, AS, Gaudi, BS, Henning, T, Johnson, MC, Molaverdikhani, K, Nascimbeni, V, Patience, J, Reiners, A, Scandariato, G, Schlawin, E, Shkolnik, E, Sicilia, D, Sozzetti, A, Mallonn, M, Veillet, C, Wang, J & Yan, F 2024, 'The PEPSI Exoplanet Transit Survey (PETS) -V. New Na D transmission spectra indicate a quieter atmosphere on HD 189733b', Monthly Notices of the Royal Astronomical Society, vol. 530, no. 4, pp. 4826-4838. https://doi.org/10.1093/mnras/stae1097

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abstract = "Absorption lines from exoplanet atmospheres observed in transmission allow us to study atmospheric characteristics such as winds. We present a new high-resolution transit time-series of HD 189733b, acquired with the PEPSI instrument at the LBT and analyse the transmission spectrum around the Na D lines. We model the spectral signature of the RM-CL V -effect using synthetic PHOENIX spectra based on spherical LTE atmospheric models. We find an Na D absorption signature between the second and third contact but not during the ingress and egress phases, which casts doubt on the planetary origin of the signal. Presupposing a planetary origin of the signal, the results suggest a weak day-to-nightside streaming wind in the order of 0.7 km s-1 and a moderate super-rotational streaming wind in the order of 3-4 km s-1, challenging claims of pre v ailing strong winds on HD 189733b.",

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author = "E. Keles and S. Czesla and K. Poppenhaeger and P. Hauschildt and Carroll, {T. A.} and I. Ilyin and M. Baratella and M. Steffen and Strassmeier, {K. G.} and Bonomo, {A. S.} and Gaudi, {B. S.} and T. Henning and Johnson, {M. C.} and K. Molaverdikhani and V. Nascimbeni and J. Patience and A. Reiners and G. Scandariato and E. Schlawin and E. Shkolnik and D. Sicilia and A. Sozzetti and M. Mallonn and C. Veillet and J. Wang and F. Yan",

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doi = "10.1093/mnras/stae1097",

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T1 - The PEPSI Exoplanet Transit Survey (PETS) -V. New Na D transmission spectra indicate a quieter atmosphere on HD 189733b

AU - Keles, E.

AU - Czesla, S.

AU - Poppenhaeger, K.

AU - Hauschildt, P.

AU - Carroll, T. A.

AU - Ilyin, I.

AU - Baratella, M.

AU - Steffen, M.

AU - Strassmeier, K. G.

AU - Bonomo, A. S.

AU - Gaudi, B. S.

AU - Henning, T.

AU - Johnson, M. C.

AU - Molaverdikhani, K.

AU - Nascimbeni, V.

AU - Patience, J.

AU - Reiners, A.

AU - Scandariato, G.

AU - Schlawin, E.

AU - Shkolnik, E.

AU - Sicilia, D.

AU - Sozzetti, A.

AU - Mallonn, M.

AU - Veillet, C.

AU - Wang, J.

AU - Yan, F.

PY - 2024/6/1

Y1 - 2024/6/1

N2 - Absorption lines from exoplanet atmospheres observed in transmission allow us to study atmospheric characteristics such as winds. We present a new high-resolution transit time-series of HD 189733b, acquired with the PEPSI instrument at the LBT and analyse the transmission spectrum around the Na D lines. We model the spectral signature of the RM-CL V -effect using synthetic PHOENIX spectra based on spherical LTE atmospheric models. We find an Na D absorption signature between the second and third contact but not during the ingress and egress phases, which casts doubt on the planetary origin of the signal. Presupposing a planetary origin of the signal, the results suggest a weak day-to-nightside streaming wind in the order of 0.7 km s-1 and a moderate super-rotational streaming wind in the order of 3-4 km s-1, challenging claims of pre v ailing strong winds on HD 189733b.

AB - Absorption lines from exoplanet atmospheres observed in transmission allow us to study atmospheric characteristics such as winds. We present a new high-resolution transit time-series of HD 189733b, acquired with the PEPSI instrument at the LBT and analyse the transmission spectrum around the Na D lines. We model the spectral signature of the RM-CL V -effect using synthetic PHOENIX spectra based on spherical LTE atmospheric models. We find an Na D absorption signature between the second and third contact but not during the ingress and egress phases, which casts doubt on the planetary origin of the signal. Presupposing a planetary origin of the signal, the results suggest a weak day-to-nightside streaming wind in the order of 0.7 km s-1 and a moderate super-rotational streaming wind in the order of 3-4 km s-1, challenging claims of pre v ailing strong winds on HD 189733b.

KW - line: profiles

KW - planets and satellites: atmospheres

KW - planets and satellites: gaseous planets

KW - stars: activity

KW - techniques: spectroscopic

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ER -

The PEPSI Exoplanet Transit Survey (PETS) -V. New Na D transmission spectra indicate a quieter atmosphere on HD 189733b

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