275 citations · 1.7k across the 23 of their papers we have counts for
18 papers · 1 filter
Evidence of energy-, recombination-, and photon-limited escape regimes in giant planet H/He atmospheres
M. Lampón, M. López-Puertas, S. Czesla +14
Hydrodynamic escape is the most efficient atmospheric mechanism of planetary mass loss and has a large impact on planetary evolution. Three hydrodynamic escape regimes have been id…
Modelling the He I triplet absorption at 10830 Angstroms in the atmospheres of HD 189733 b and GJ 3470 b
M. Lampón, M. López-Puertas, J. Sanz-Forcada +16
Characterising the atmospheres of exoplanets is key to understanding their nature and provides hints about their formation and evolution. High-resolution measurements of the helium…
Observability of ultraviolet N I lines in the atmosphere of transiting Earth-like planets
Mitchell E. Young, Luca Fossati, Colin Johnstone +5
Nitrogen is a biosignature gas that cannot be maintained in its Earth-like ratio with CO under abiotic conditions. It has also proven to be notoriously hard to detect at optica…
Non-Local Thermodynamic Equilibrium Transmission Spectrum Modelling of HD209458b
Mitchell E. Young, Luca Fossati, Tommi T. Koskinen +3
Context - Exoplanetary upper atmospheres are low density environments where radiative processes can compete with collisional ones and introduce non-local thermodynamic equilibrium…
Modelling the He I triplet absorption at 10830 Angstroms in the atmosphere of HD 209458 b
M. Lampón, M. López-Puertas, L. M. Lara +16
HD 209458b is an exoplanet with an upper atmosphere undergoing blow-off escape that has mainly been studied using measurements of the Ly-alpha absorption. Recently, high-resolution…
Near-ultraviolet Transmission Spectroscopy of HD 209458b: Evidence of Ionized Iron Beyond the Planetary Roche Lobe
Patricio E. Cubillos, Luca Fossati, Tommi Koskinen +5
The inflated transiting hot Jupiter HD 209458b is one of the best studied objects since the beginning of exoplanet characterization. Transmission observations of this system betwee…
A giant exoplanet orbiting a very low-mass star challenges planet formation models
J. C. Morales, A. J. Mustill, I. Ribas +179
Statistical analyses from exoplanet surveys around low-mass stars indicate that super-Earth and Neptune-mass planets are more frequent than gas giants around such stars, in agreeme…
Water vapor detection in the transmission spectra of HD 209458 b with the CARMENES NIR channel
A. Sánchez-López, F. J. Alonso-Floriano, M. López-Puertas +31
Aims: We aim at detecting HO in the atmosphere of the hot Jupiter HD 209458 b and perform a multi-band study in the near infrared with CARMENES. Methods: The HO absorption…
He I 10830 Å in the transmission spectrum of HD 209458 b
F. J. Alonso-Floriano, I. A. G. Snellen, S. Czesla +27
Context: Recently, the He I triplet at 10830 Å has been rediscovered as an excellent probe of the extended and possibly evaporating atmospheres of close-in transiting planets. This…
Swift UVOT near-UV transit observations of WASP-121 b
M. Salz, P. C. Schneider, L. Fossati +3
Close-in gas planets are subject to continuous photoevaporation that can erode their volatile envelopes. Today, ongoing mass loss has been confirmed in a few individual systems via…
Ground-based detection of an extended helium atmosphere in the Saturn-mass exoplanet WASP-69b
Lisa Nortmann, Enric Pallé, Michael Salz +25
Hot gas giant exoplanets can lose part of their atmosphere due to strong stellar irradiation, affecting their physical and chemical evolution. Studies of atmospheric escape from ex…
Detection of He I Å absorption on HD 189733 b with CARMENES high-resolution transmission spectroscopy
M. Salz, S. Czesla, P. C. Schneider +35
We present three transit observations of HD 189733 b obtained with the high-resolution spectrograph CARMENES at Calar Alto. A strong absorption signal is detected in the near-infra…
Multiple water band detections in the CARMENES near-infrared transmission spectrum of HD 189733 b
F. J. Alonso-Floriano, A. Sánchez-López, I. A. G. Snellen +27
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 m. Hubble Space…
The atmosphere of WASP-17b: Optical high-resolution transmission spectroscopy
Sara Khalafinejad, Michael Salz, Patricio E. Cubillos +8
High-resolution transmission spectroscopy is a method for understanding the chemical and physical properties of upper exoplanetary atmospheres. Due to large absorption cross-sectio…
The XUV environments of exoplanets from Jupiter-size to super-Earth
George W. King, Peter J. Wheatley, Michael Salz +8
Planets that reside close-in to their host star are subject to intense high-energy irradiation. Extreme-ultraviolet (EUV) and X-ray radiation (together, XUV) is thought to drive ma…
Energy-limited escape revised
M. Salz, P. C. Schneider, S. Czesla +1
Gas planets in close proximity to their host stars experience photoevaporative mass loss. The energy-limited escape concept is generally used to derive estimates for the planetary…
Simulating the escaping atmospheres of hot gas planets in the solar neighborhood
M. Salz, S. Czesla, P. C. Schneider +1
Absorption of high-energy radiation in planetary thermospheres is believed to lead to the formation of planetary winds. The resulting mass-loss rates can affect the evolution, part…
High-energy irradiation and mass loss rates of hot Jupiters in the solar neighborhood
M. Salz, P. C. Schneider, S. Czesla +1
Giant gas planets in close proximity to their host stars experience strong irradiation. In extreme cases photoevaporation causes a transonic, planetary wind and the persistent mass…