Results 81 to 90 of about 3,335,678 (179)

Breaking Giant Chains: Early-stage Instabilities in Long-period Giant Planet Systems

The Astrophysical Journal
Orbital evolution is a critical process that sculpts planetary systems, particularly during their early stages where planet–disk interactions are expected to lead to the formation of resonant chains.
Vighnesh Nagpal, Max Goldberg, Konstantin Batygin   +2 more
doaj   +1 more source

Effects of Hot Oxygen Corona on Ion Escape From Venus‐Like Planets

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract Due to the lack of a significant planetary magnetic field, the upper atmospheres of Venus‐like planets interact directly with the stellar wind. Therefore, thermal atomic oxygen in the thermosphere and hot oxygen in the corona produced by non‐thermal processes in the upper atmosphere act as a source of ion pickup loss.
T. Nishioka, K. Seki, R. Sakata, N. Terada, S. Sakai, H. Shinagawa, A. Nakayama   +6 more
wiley   +1 more source

Exoplanet winds: Modelling atmospheric dynamics via resolved spectral lines

, 2021
This thesis benchmarked a new probe of atmospheric dynamics in exoplanet atmospheres by resolving the spectral lines stemming from these far atmospheres and then modelling their line shape taking into account the broadening from atmospheric winds.
Seidel, Julia Victoria
core   +1 more source

On the Detection of Low‐Frequency Planetary Radio Emission With an Orbiting Interferometer

Radio Science, Volume 61, Issue 6, June 2026.
Abstract The magnetized planets of the outer Solar System produce kilometric radio emissions at very low frequencies (<1 ${< } 1\,$MHz). They reveal the planetary magnetic dynamics and their interaction with the solar wind. Those radio emissions can also serve as a proxy for interplanetary space weather monitoring.
E. Rouillé, B. Cecconi, B. Segret, J. N. Girard, A. Loh   +4 more
wiley   +1 more source

Exoplanet Terra Incognita [PDF]

, 2018
Exoplanet surface imaging, cartography and the search for exolife are the next frontiers of planetology and astrophysics. Here we present an over-view of ideas and techniques to resolve albedo features on exoplanetary surfaces.
Belikov, Ruslan, Berdyugina, Svetlana V., Ruslan Belikov, Svetlana V. Berdyugina, Jeff R. Kuhn, Kuhn, Jeff R., Turyshev, Slava G., Slava G. Turyshev   +7 more
core   +1 more source

Machine learning approaches for exoplanet detection.

, 2022
Machine learning approaches for exoplanet detection.
Sara Cuéllar (12634749), Paulo Granados (12634752), Gonzalo Farias (12634767), Héctor Vargas (12634761), Michel Curé (12634758), Sebastián Dormido-Canto (12634764), Ernesto Fabregas (12634755)   +6 more
core   +1 more source

Exoplanet biosignatures : a review of remotely detectable signs of life [PDF]

, 2017
In the coming years and decades, advanced space- and ground-based observatories will allow an unprecedented opportunity to probe the atmospheres and surfaces of potentially habitable exoplanets for signatures of life.
Grenfell, John Lee, Lyons, Timothy W., Meadows, Victoria S, Nancy Y. Kiang, Siddharth Hegde, Meadows, Victoria S., Chester E. Harman, Edward W. Schwieterman, Timothy W. Lyons, Hu, Renyu, Renyu Hu, Cockell, Charles S, Parenteau, Mary N., DasSarma, Shiladitya, Sarah Rugheimer, Fisher, Theresa M., Christopher T. Reinhard, Shiladitya DasSarma, Hilairy E. Hartnett, Victoria S. Meadows, Walker, Sara L., Kiang, Nancy Y, Sara I. Walker, Parenteau, Mary N, Harman, Chester E, Olson, Stephanie L, Schwieterman, Edward W., Hegde, Siddharth, John Lee Grenfell, Hartnett, Hilairy E., Walker, Sara I., Fisher, Theresa M, Reinhard, Christopher T., Mary N. Parenteau, Giada N. Arney, Rugheimer, Sarah, Reinhard, Christopher T, Schwieterman, Edward W, Arney, Giada N, Hartnett, Hilairy E, Harman, Chester E., Cockell, Charles S., Stephanie L. Olson, Charles S. Cockell, Arney, Giada N., Lyons, Timothy W, Kiang, Nancy Y., Walker, Sara I, Olson, Stephanie L., Theresa M. Fisher, Schwieterman, E.W., Parenteau, MN, Hegde, S, Meadows, V.S., DasSarma, S., Fisher, TM, Harman, CE, Rheinhard, C.T., Cockell, C.S., Schwieterman, EW, Arney, GN, Lyons, TW, Walker, S.I., Fisher, T.M., Arney, G.A., Dassarma, S, Hu, R, Kiang, NY, Kiang, N.Y., Hartnett, H.E., Grenfell, J L, Olson, SL, Hartnett, HE, Olson, S.L., Walker, SI, Reinhard, CT, Meadows, VS, Grenfell, JL, Parenteau, M.N., Cockell, CS   +79 more
core   +1 more source

The Prevalence of Resonance Among Young, Close-in Planets

The Astronomical Journal
Multiple planets undergoing disk migration may be captured into a chain of mean-motion resonances with the innermost planet parked near the disk’s inner edge.
Fei Dai, Max Goldberg, Konstantin Batygin, Jennifer van Saders, Eugene Chiang, Nick Choksi, Rixin Li, Erik A. Petigura, Gregory J. Gilbert, Sarah C. Millholland, Yuan-Zhe Dai, Luke Bouma, Lauren M. Weiss, Joshua N. Winn   +13 more
doaj   +1 more source

Using dimers to measure biosignatures and atmospheric pressure for terrestrial exoplanets [PDF]

, 2014
We present a new method to probe atmospheric pressure on Earth-like planets using (O-O) dimers in the near-infrared. We also show that dimer features could be the most readily detectable biosignatures for Earth-like atmospheres and may even be detectable
Misra, A., Meadows, V., Claire, M., Crisp, D., Claire, M.; id_orcid   +4 more
core   +1 more source

Investigating the Origins of Hot Neptunes from Radial Velocity Data

The Astronomical Journal
Hot Neptunes are extrasolar planets that are similar in size to Neptune in our solar system but are much closer to their host stars, completing an orbit in 10 days or less. The origin of hot Neptunes is not fully understood.
Sophie Y. Zheng
doaj   +1 more source