Results 51 to 60 of about 6,063 (251)

Thermosphere and exosphere of hot Jupiters [PDF]

Proceedings of the International Astronomical Union, 2008
AbstractHere we describe the observations and the resulting constraints on the upper atmosphere (thermosphere and exosphere) of hot Jupiters. In particular, observations and theoretical modeling of hot-Jupiter evaporation are described. The observations allowed the discovery that the planet orbiting HD209458 has an extended atmosphere of escaping ...
openaire   +2 more sources

A DETECTION OF Hα IN AN EXOPLANETARY EXOSPHERE [PDF]

The Astrophysical Journal, 2012
We report on a search for H-alpha absorption in four exoplanets. Strong features at H-alpha are observed in the transmission spectra of both HD 189733b and HD 209458b. We attempt to characterize and remove the effects of stellar variability in HD 189733b, and along with an empirical Monte Carlo test the results imply a statistically significant transit-
Jensen, Adam G., Redfield, Seth, Endl, Michael, Cochran, William D., Koesterke, Lars, Barman, Travis   +5 more
openaire   +3 more sources

Mercury's exosphere origins and relations to its magnetosphere and surface [PDF]

, 2007
Mariner 10, the only spacecraft that ever passed close to Mercury, revealed several unexpected characteristics: an intrinsic magnetosphere, the highest mean density of any Solar System terrestrial planet and a very thin non-collisional atmosphere ...
Potter, A. E., Delcourt, Dominique, C., Mendillo, M., Yan, Nicolas, Leblanc, François, Sprague, A. L., Luhmann, J. G., Chassefière, Eric, Cremonese, Gabriele, Killen, R. M., Kallio, E., Jambon, Albert, Johnson, R. E., Hunten, D. M.   +13 more
core   +1 more source

The Interplay of Surface Composition, Mineralogy, and Physical Conditions That Affect the Surface Release Processes and Particle Environment of Mercury

The Planetary Science Journal
Mercury has a very tenuous atmosphere starting at the surface, which is referred to as a surface-bound exosphere, where there are no collisions between exospheric particles.
Peter Wurz, Noah Jäggi, André Galli, Audrey Vorburger, Deborah Domingue, Paul S. Szabo, Johannes Benkhoff, Océane Barraud, Daniel Wolf Savin   +8 more
doaj   +1 more source

Authoring Terrestrial Planets with Diffusion Models

Computer Graphics Forum, EarlyView.
Abstract To support the design and subsequent generation of terrestrial planets for use in the creative media, we propose a solution that employs a generative model trained on satellite data from planetary bodies with a defined solid surface, such as the Earth and Mars.
Oliver Borg, James Gain, Éric Guérin, Adrien Peytavie, Marie‐Paule Cani, Eric Galin, Guillaume Cordonnier   +6 more
wiley   +1 more source

Reconciling the Dawn–Dusk Asymmetry in Mercury’s Exosphere with the Micrometeoroid Impact Directionality [PDF]

, 2017
Combining dynamical models of dust from Jupiter-family comets and Halley-type comets, we demonstrate that the seasonal variation of the dust/meteoroid environment at Mercury is responsible for producing the dawn–dusk asymmetry in Mercury’s exosphere ...
P. Pokorný, M. Sarantos, D. Janches
semanticscholar   +1 more source

Argon‐40 in Lunar Exosphere: Observations From CHACE‐2 on Chandrayaan‐2 Orbiter

Geophysical Research Letters, 2021
We report the first observation of Argon‐40 (Ar‐40) in the mid latitude regions (−60° to +60°) of the lunar exosphere from CHandra’s Atmospheric Composition Explorer‐2 (CHACE‐2) experiment aboard Chandrayaan‐2 orbiter.
M. B. Dhanya, Smitha V. Thampi, Tirtha Pratim Das, R. Satheesh Thampi, Neha Naik, J. K. Abhishek, P. Sreelatha, P. Pradeepkumar, G. Padma Padmanabhan, B. Sundar, Dinakar Prasad Vajja, Amarnath Nandi, Vipin K. Yadav, M. Mohammed Nazeer, P. T. Lali, Rosmy John, A. V. Aliyas, Vijay Kumar Sen, M. Ram Prabhu, A. Ajay Krishna, Tarun K. Pant, Anil Bhardwaj   +21 more
doaj   +1 more source

Radiative transfer in the exosphere of Saturn's moon Titan [PDF]

, 2009
This work focuses on the distribution of atomic hydrogen in the exosphere of Saturns̉ moon Titan. This work is based on measurements performed by the Hydrogen Deuterium Absorption Cell (HDAC) aboard the Cassini spacecraft, that should directly determine ...
Hedelt, Pascal
core   +1 more source

The role of the dynamic terrestrial exosphere in the storm-time ring current decay

Frontiers in Astronomy and Space Sciences
The charge exchange interaction between exospheric hydrogen (H) atoms and energetic ions in the terrestrial ring current is a crucial mechanism for dissipating global magnetospheric energy, especially during the recovery phase of geomagnetic storms ...
Gonzalo Cucho-Padin, Gonzalo Cucho-Padin, Cristian P. Ferradas, Cristian P. Ferradas, Mei-Ching Fok, Lara Waldrop, Jochen Zoennchen, Suk-Bin Kang, Suk-Bin Kang   +8 more
doaj   +1 more source

Lunar Dayside Surface Potentials in the Terrestrial Magnetotail Inferred From Comparing Observed and Modeled Photoelectrons

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract As an airless body, the lunar surface is charged as a result of balancing electric currents into and away from the surface. Lunar surface charging is important for both scientific and human‐exploration purposes. The nightside surface charging has been well characterized by previous studies, but less so for the dayside.
Shaosui Xu, Andrew R. Poppe, Yuki Harada, Phillip C. Chamberlin   +3 more
wiley   +1 more source