Results 31 to 40 of about 3,038,400 (211)

Hubble Space Telescope Transmission Spectroscopy for the Temperate Sub-Neptune TOI-270 d: A Possible Hydrogen-rich Atmosphere Containing Water Vapor

The Astronomical Journal, 2023
TOI-270 d is a temperate sub-Neptune discovered by the Transiting Exoplanet Survey Satellite (TESS) around a bright ( J = 9.1 mag) M3V host star. With an approximate radius of 2 R _⊕ and equilibrium temperature of 350 K, TOI-270 d is one of the most ...
Thomas Mikal-Evans, Nikku Madhusudhan, Jason Dittmann, Maximilian N. Günther, Luis Welbanks, Vincent Van Eylen, Ian J. M. Crossfield, Tansu Daylan, Laura Kreidberg   +8 more
doaj   +1 more source

Simultaneous characterization of the atmospheres, surfaces, and exomoons of nearby rocky exoplanets

Earth and Planetary Physics, 2018
Atmospheric composition is an important indicator of habitability and life. The presence or absence of a large exomoon around an Earth-size exoplanet could have important consequences for planet climate stability.
WenLiang Cui, JinSu Zhang, Frederic Schmidt, Duo Cui, XiaoMeng Huang, Tong Li, Feng Tian   +6 more
doaj   +1 more source

Exo-Transmit: An Open-Source Code for Calculating Transmission Spectra for Exoplanet Atmospheres of Varied Composition [PDF]

Publications of the Astronomical Society of the Pacific, 2017
We present Exo-Transmit, a software package to calculate exoplanet transmission spectra for planets of varied composition. The code is designed to generate spectra of planets with a wide range of atmospheric composition, temperature, surface gravity, and size, and is therefore applicable to exoplanets ranging in mass and size from hot Jupiters down to ...
Kempton, Eliza M. -R., Lupu, Roxana E., Owusu-Asare, Albert, Slough, Patrick, Cale, Bryson   +4 more
openaire   +2 more sources

Correction to: 3D modelling of the impact of stellar activity on tidally locked terrestrial exoplanets: atmospheric composition and habitability

Monthly Notices of the Royal Astronomical Society, 2023
This is the final version. Available on open access from Oxford University Press via the DOI in this record ; The article for which this is the correction is available in ORE at http://hdl.handle.net/10871/131398 ; This is a correction to: R. J. Ridgway, M. Zamyatina, N. J. Mayne, J. Manners, F. H. Lambert, M. Braam, B. Drummond, E. Hébrard, P.
Ridgway, RJ, Zamyatina, M, Mayne, NJ, Manners, J, Lambert, FH, Braam, M, Drummond, B, Hebrar, E, Palmer, PI, Kohary, K   +9 more
openaire   +2 more sources

The Similar Seven: A Set of Very Alike Exoplanets to Test Correlations between System Parameters and Atmospheric Properties

The Astrophysical Journal Letters, 2023
Studies of exoplanetary atmospheres have found no definite correlations between observed high-altitude aerosols and other system parameters. This could be, in part, because of the lack of homogeneous exoplanet samples for which specific parameters can be
Chima D. McGruder, Mercedes López-Morales, Rafael Brahm, Andrés Jordán   +3 more
doaj   +1 more source

Abiotic ozone and oxygen in atmospheres similar to prebiotic earth [PDF]

, 2014
The search for life on planets outside our solar system will use spectroscopic identification of atmospheric biosignatures. The most robust remotely detectable potential biosignature is considered to be the detection of oxygen (O2) or ozone (O3 ...
Domagal-Goldman, Shawn D., Robinson, T.D., Segura, A., Claire, Mark W., Claire, M.W., Meadows, Victoria S., Meadows, V.S., Domagal-Goldman, S.D., Robinson, Tyler D., Segura, Antigona, Claire, M.W.; id_orcid   +10 more
core   +1 more source

Atmospheric C/O Ratios of Sub-Neptunes with Magma Oceans: Homemade rather than Inherited

The Astrophysical Journal Letters
Recently, the James Webb Space Telescope has enabled detailed spectroscopic characterization of sub-Neptune atmospheres. With detections of carbon- and oxygen-bearing species such as CO, CO _2 , CH _4 , and H _2 O, a central question is whether the ...
Aaron Werlen, Caroline Dorn, Hilke E. Schlichting, Simon L. Grimm, Edward D. Young   +4 more
doaj   +1 more source

The atmospheres of rocky exoplanets

Astronomy & Astrophysics
Context. The crust composition of rocky exoplanets with substantial atmospheres cannot be observed directly. However, recent developments have enabled novel observations and characterisations of their atmospheres. Aims. We aim to establish a link between observable spectroscopic atmospheric features and the mineralogical crust composition of exoplanets.
O. Herbort, L. Sereinig
openaire   +2 more sources

AURA-3D: Three-dimensional Atmospheric Retrieval of Exoplanet Transmission Spectra

, 2023
This poster provides a summary of the following paper: "Aura-3D: A Three-dimensional Atmospheric Retrieval Framework for Exoplanet Transmission Spectra", Nixon & Madhusudhan 2022, ApJ, 935, 73N It was presented at the STScI Spring Symposium ...
Nixon, Matthew Conor, Madhusudhan, Nikku
core   +1 more source

Sub-Neptunes Are Drier than They Seem: Rethinking the Origins of Water-rich Worlds

The Astrophysical Journal Letters
Recent claims of biosignature gases in sub-Neptune atmospheres have renewed interest in water-rich sub-Neptunes with surface oceans, often referred to as Hycean planets. These planets are hypothesized to form beyond the snow line, accreting large amounts
Aaron Werlen, Caroline Dorn, Remo Burn, Hilke E. Schlichting, Simon L. Grimm, Edward D. Young   +5 more
doaj   +1 more source