Results 11 to 20 of about 2,627,055 (211)

CHEOPS observations of the HD 108236 planetary system: a fifth planet, improved ephemerides, and planetary radii [PDF]

Astronomy & Astrophysics, 2021
Context. The detection of a super-Earth and three mini-Neptunes transiting the bright (V = 9.2 mag) star HD 108236 (also known as TOI-1233) was recently reported on the basis of TESS and ground-based light curves. Aims.
A. Bonfanti, L. Delrez, M. Hooton, T. Wilson, L. Fossati, Y. Alibert, S. Hoyer, A. Mustill, H. Osborn, V. Adibekyan, D. Gandolfi, S. Salmon, S. Sousa, A. Tuson, V. Grootel, J. Cabrera, V. Nascimbeni, P. Maxted, S. Barros, N. Billot, X. Bonfils, L. Borsato, C. Broeg, M. Davies, M. Deleuil, O. Demangeon, M. Fridlund, G. Lacedelli, M. Lendl, C. Persson, N. Santos, G. Scandariato, G. Szab'o, A. Cameron, S. Udry, W. Benz, M. Beck, D. Ehrenreich, A. Fortier, K. Isaak, D. Queloz, R. Alonso, J. Asquier, T. Bandy, T. B'arczy, D. Barrado, O. Barrag'an, Wolfgang Baumjohann, T. Beck, A. Bekkelien, M. Bergomi, M. Busch, A. Brandeker, V. Cessa, S. Charnoz, B. Chazelas, C. V. Damme, B. Demory, A. Erikson, J. Farinato, D. Futyan, A. G. Muñoz, M. Gillon, M. Guedel, P. Guterman, J. Hasiba, K. Heng, E. Hernandez, L. Kiss, T. Kuntzer, J. Laskar, A. D. Étangs, C. Lovis, D. Magrin, L. Malvasio, L. Marafatto, H. Michaelis, M. Munari, G. Olofsson, H. Ottacher, R. Ottensamer, I. Pagano, E. Pall'e, G. Peter, D. Piazza, G. Piotto, D. Pollacco, R. Ragazzoni, N. Rando, F. Ratti, H. Rauer, I. Ribas, M. Rieder, R. Rohlfs, F. Safa, M. Salatti, D. S'egransan, A. Simon, A.M.S. Smith, M. Sordet, M. Steller, N. Thomas, M. Tschentscher, V. V. Eylen, V. Viotto, I. Walter, N. Walton, F. Wildi, D. Wolter   +108 more
semanticscholar   +1 more source

The case for studying other planetary magnetospheres and atmospheres in Heliophysics [PDF]

Vol. 55, Issue 3 (Heliophysics 2024 Decadal Whitepapers), 2023
Heliophysics is the field that"studies the nature of the Sun, and how it influences the very nature of space - and, in turn, the atmospheres of planetary bodies and the technology that exists there."However, NASA's Heliophysics Division tends to limit ...
I. Cohen, C. Arridge, A. Azari, C. Bard, G. Clark, F. Crary, S. Curry, P. Delamere, R. Dewey, G. DiBraccio, C. Dong, A. Drozdov, Austin Engert, Rachael J. Filwett, J. Halekas, A. Halford, A. Hughes, K. Garcia‐Sage, M. Gkioulidou, C. Goetz, C. Grava, M. Hirsch, H. Huybrighs, P. Kollmann, L. Lamy, Wen Li, M. Liemohn, R. Marshal, A. Masters, R. McAteer, Karan Molaverdikhani, A. Mukhopadhyay, R. Nikoukar, L. Paxton, L. Regoli, E. Roussos, N. Schneider, A. Sulaiman, Y. Sun, J. Szalay   +39 more
semanticscholar   +1 more source

A low accretion efficiency of planetesimals formed at planetary gap edges [PDF]

Astronomy & Astrophysics, 2022
Observations and models of giant planets indicate that such objects are enriched in heavy elements compared to solar abundances. The prevailing view is that giant planets accreted multiple Earth masses of heavy elements after the end of core formation ...
L.E.J. Eriksson, T. Ronnet, A. Johansen, R. Helled, C. Valletta, A. C. Petit   +5 more
semanticscholar   +1 more source

Three planets transiting the evolved star EPIC 249893012: a hot 8.8-M⊕ super-Earth and two warm 14.7 and 10.2-M⊕ sub-Neptunes [PDF]

Astronomy & Astrophysics, 2020
We report the discovery of a new planetary system with three transiting planets, one super-Earth and two sub-Neptunes, that orbit EPIC 249893012, a G8 IV-V evolved star (M⋆ = 1.05 ± 0.05 M⊙, R⋆ = 1.71 ± 0.04 R⊙, Teff = 5430 ± 85 K).
D. Hidalgo, E. Pallé, R. Alonso, D. Gandolfi, M. Fridlund, G. Nowak, R. Luque, T. Hirano, A. B. Justesen, W. Cochran, O. Barragán, L. Spina, F. Rodler, S. Albrecht, D. Anderson, P. Amado, E. Bryant, J. Caballero, J. Cabrera, S. Csizmadia, F. Dai, J. D. Leon, H. Deeg, P. Eigmüller, M. Endl, A. Erikson, Massimiliano Esposito, P. Figueira, I. Georgieva, S. Grziwa, E. Guenther, A. Hatzes, M. Hjorth, H. J. Hoeijmakers, P. Kabáth, J. Korth, M. Kuzuhara, M. Lafarga, M. Lampón, I. Leão, J. Livingston, S. Mathur, P. Montañés-Rodríguez, J. Morales, F. Murgas, E. Nagel, N. Narita, L. Nielsen, M. Pätzold, C. Persson, J. Prieto-Arranz, A. Quirrenbach, H. Rauer, S. Redfield, A. Reiners, I. Ribas, Alexis M. S. Smith, J. Šubjak, V. V. Eylen, P. Wilson   +59 more
semanticscholar   +1 more source

Growth after the streaming instability: The radial distance dependence of the planetary growth [PDF]

Astronomy & Astrophysics, 2022
Streaming instability is hypothesized to be triggered at particular protoplanetary disk locations where the volume density of the solid particles is enriched comparable to that of the gas.
H. Jang, Beibei Liu, A. Johansen
semanticscholar   +1 more source

Development of non‐destructive analytical strategies based on Raman spectroscopy and complementary techniques for Mars Sample Return tested on Northwest Africa 1950 Martian meteorite

Journal of Raman Spectroscopy, Volume 53, Issue 12, Page 2068-2085, December 2022., 2022
A non‐destructive analytical methodology, based on Raman microscopy (single point and imaging), micro‐energy dispersive X‐ray fluorescence (μED‐XRF) imaging analysis, and scanning electron microscopy coupled to energy dispersive spectroscopy (SEM‐EDS), is suggested for a first analytical characterization for the Martian samples that will be taken to ...
Leire Coloma, Cristina García‐Florentino, Jennifer Huidobro, Imanol Torre‐Fdez, Julene Aramendia, Gorka Arana, Kepa Castro, Juan Manuel Madariaga   +7 more
wiley   +1 more source

Quantifying the Key Factors Affecting the Escape of Planetary Atmospheres

Astrophysical Journal, 2023
The habitability of Earth-like planets is an increasingly important subject in astrophysics and in planetary sciences. Atmospheric escape plays a vital role in the evolution of the habitability of Earth-like planets.
J. Luo, H.-Q. He, Gongsheng Tong, Jiao Li   +3 more
semanticscholar   +1 more source

Ground Motion Simulations for the 19 January 2020 Jiashi, China, Earthquake Using Stochastic Finite‐Fault Approach

Earth and Space Science, Volume 9, Issue 12, December 2022., 2022
Abstract A 6.0‐magnitude (Mw) earthquake was reported to have occurred in Jiashi County, Xinjiang at 21:27 on 19 January 2020, Beijing time (13:27 UTC). This study applied a stochastic finite‐fault approach based on the dynamic corner frequency (EXSIM) to simulate 23 near‐field stations within a distance of 120 km from the epicenter.
Chong Wang, Pengfei Dang, Wenhao Qi, Yadong Li, Fuyun Wang, Jingshan Bo   +5 more
wiley   +1 more source

Regional‐Scale Landscape Response to an Extreme Precipitation Event From Repeat Lidar and Object‐Based Image Analysis

Earth and Space Science, Volume 9, Issue 12, December 2022., 2022
Abstract Extreme precipitation events may cause flooding, slope failure, erosion, deposition, and damage to infrastructure over a regional scale, but the impacts of these events are often difficult to fully characterize. Regional‐scale landscape change occurred during an extreme rain event in June 2012 in northeastern Minnesota.
S. B. DeLong, M. N. Hammer, Z. T. Engle, E. M. Richard, A. J. Breckenridge, K. B. Gran, C. E. Jennings, A. Jalobeanu   +7 more
wiley   +1 more source

2019 Mw 6.0 Mesetas (Colombia) Earthquake Sequence: Insights From Integrating Seismic and Morphostructural Observations

Earth and Space Science, Volume 9, Issue 12, December 2022., 2022
Abstract The boundary between the Northern Andean block and the South American plate is a first‐order tectonic structure in Colombia with historically M > 7 earthquakes. However, details about individual sections of the system remain unknown. We illuminate the seismotectonic of the Algeciras fault by investigating an earthquake sequence that started on
Esteban Poveda, Patricia Pedraza, Francisco Velandia, Edwin Mayorga, Vladimír Plicka, František Gallovič, Jiří Zahradník   +6 more
wiley   +1 more source