Results 11 to 20 of about 22,677,777 (195)

Alkaline exospheres of exoplanet systems: evaporative transmission spectra [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT Hydrostatic equilibrium is an excellent approximation for the dense layers of planetary atmospheres, where it has been canonically used to interpret transmission spectra of exoplanets. Here, we exploit the ability of high-resolution spectrographs to probe tenuous layers of sodium and potassium gas due to their formidable ...
Andrea Gebek, Apurva V Oza
openaire   +5 more sources

Stability analysis of three exoplanet systems [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT The orbital solutions of published multiplanet systems are not necessarily dynamically stable on time-scales comparable to the lifetime of the system as a whole. For this reason, dynamical tests of the architectures of proposed exoplanetary systems are a critical tool to probe the stability and feasibility of the candidate ...
M W Mengel, J T Clark, R A Wittenmyer, J Horner, J P Marshall   +4 more
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Evidence for Low-level Dynamical Excitation in Near-resonant Exoplanet Systems [PDF]

The Astronomical Journal, 2023
The geometries of near-resonant planetary systems offer a relatively pristine window into the initial conditions of exoplanet systems. Given that near-resonant systems have likely experienced minimal dynamical disruptions, the spin–orbit orientations of ...
Malena Rice, Xian-Yu Wang, Songhu Wang, Avi Shporer, Khalid Barkaoui, Rafael Brahm, Karen A. Collins, Andrés Jordán, Nataliea Lowson, R. Paul Butler, Jeffrey D. Crane, Stephen Shectman, Johanna K. Teske, David Osip, Kevin I. Collins, Felipe Murgas, Gavin Boyle, Francisco J. Pozuelos, Mathilde Timmermans, Emmanuel Jehin, Michaël Gillon   +20 more
doaj   +2 more sources

DEBRIS DISKS INKEPLEREXOPLANET SYSTEMS [PDF]

The Astrophysical Journal, 2012
The Kepler Mission recently identified 997 systems hosting candidate extrasolar planets, many of which are super-Earths. Realizing these planetary systems are candidates to host extrasolar asteroid belts, we use mid-infrared data from the Wide-field Infrared Survey Explorer (WISE) to search for emission from dust in these systems.
Lawler, S. M., Gladman, B.
openaire   +4 more sources

The Orbital Geometries and Stellar Obliquities of Exoplanet-hosting Multistar Systems

The Astronomical Journal
The current orbital geometries of exoplanet systems offer a fossilized record of the systems’ dynamical histories. A particularly rich set of dynamical mechanisms is available to exoplanets residing in multistar systems, which may have their evolution ...
Malena Rice, Konstantin Gerbig, Andrew Vanderburg   +2 more
doaj   +2 more sources

SPIN–ORBIT ALIGNMENT OF EXOPLANET SYSTEMS: ENSEMBLE ANALYSIS USING ASTEROSEISMOLOGY [PDF]

The Astrophysical Journal, 2016
ABSTRACT The angle ψ between a planet’s orbital axis and the spin axis of its parent star is an important diagnostic of planet formation, migration, and tidal evolution. We seek empirical constraints on ψ by measuring the stellar inclination i s via asteroseismology for an ensemble of 25 solar-type hosts observed with ...
T. L. Campante, M. N. Lund, J. S. Kuszlewicz, G. R. Davies, W. J. Chaplin, S. Albrecht, J. N. Winn, T. R. Bedding, O. Benomar, D. Bossini, R. Handberg, A. R. G. Santos, V. Van Eylen, S. Basu, J. Christensen-Dalsgaard, Y. P. Elsworth, S. Hekker, T. Hirano, D. Huber, C. Karoff, H. Kjeldsen, M. S. Lundkvist, T. S. H. North, V. Silva Aguirre, D. Stello, T. R. White   +25 more
openaire   +8 more sources

Resonant and Ultra-short-period Planet Systems Are at Opposite Ends of the Exoplanet Age Distribution

The Astronomical Journal
Exoplanet systems are thought to evolve on secular timescales over billions of years. This evolution is impossible to directly observe on human timescales in most individual systems.
Stephen P. Schmidt, Kevin C. Schlaufman, Jacob H. Hamer   +2 more
doaj   +2 more sources

The NASA Exoplanet Archive and Exoplanet Follow-up Observing Program: Data, Tools, and Usage

The Planetary Science Journal
The NASA Exoplanet Archive (NEA) and the Exoplanet Follow-up Observing Program service are two widely used resources for the exoplanet community. The NEA provides a complete and accurate accounting of exoplanetary systems published by NASA missions and ...
Jessie L. Christiansen, Douglas L. McElroy, Marcy Harbut, David R. Ciardi, Megan Crane, John Good, Kevin K. Hardegree-Ullman, Aurora Y. Kesseli, Michael B. Lund, Meca Lynn, Ananda Muthiar, Ricky Nilsson, Toba Oluyide, Michael Papin, Amalia Rivera, Melanie Swain, Nicholas D. Susemiehl, Raymond Tam, Julian van Eyken, Charles Beichman   +19 more
doaj   +2 more sources

Multibeam Blind Search of Targeted SETI Observations toward 33 Exoplanet Systems with FAST [PDF]

Astronomical Journal, 2023
The search for extraterrestrial intelligence (SETI) is to search for technosignatures associated with extraterrestrial life, such as engineered radio signals.
Xiaolu Luan, Z. Tao, Haibo Zhao, Bo-Lun Huang, Shi-Yu Li, Cong Liu, Hong-feng Wang, Wen-Fei Liu, Tong-Jie Zhang, V. Gajjar, D. Werthimer   +10 more
semanticscholar   +1 more source

Sensitive Multibeam Targeted SETI Observations toward 33 Exoplanet Systems with FAST [PDF]

Astronomical Journal, 2022
As a major approach to looking for life beyond the Earth, the search for extraterrestrial intelligence (SETI) is committed to searching for technosignatures such as engineered radio signals that are indicative of technologically capable life.
Z. Tao, Haibo Zhao, Tong-Jie Zhang, V. Gajjar, Yan Zhu, Y. Yue, Hai-yan Zhang, Wen-Fei Liu, Shi-Yu Li, Jian-Chen Zhang, Cong Liu, Hong-feng Wang, R. Duan, L. Qian, C. Jin, Di Li, A. Siemion, P. Jiang, D. Werthimer, J. Cobb, E. Korpela, David Anderson   +21 more
semanticscholar   +1 more source