Results 21 to 30 of about 6,471 (197)

New observations of the extended hydrogen exosphere of the extrasolar planet HD209458b

, 2008
Atomic hydrogen escaping from the planet HD209458b provides the largest observational signature ever detected for an extrasolar planet atmosphere. However, the Space Telescope Imaging Spectrograph (STIS) used in previous observational studies is no ...
A. Lecavelier des Etangs, A. Vidal-Madjar, Ballester, Ben-Jaffel, Brown, Brown, C. D. Parkinson, Charbonneau, Charbonneau, D. Ehrenreich, Ehrenreich, Ford, G. E. Ballester, G. Hébrard, García-Muñoz, Henry, Holmström, Hubbard, J. C. McConnell, J.-M. Désert, Knutson, Lecavelier des Etangs, Lecavelier des Etangs, Moutou, R. Ferlet, Rauer, Schneiter, Seager, Tian, Tinetti, Vidal-Madjar, Vidal-Madjar, Vidal-Madjar, Wittenmyer, Yelle, Yelle   +35 more
core   +6 more sources

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

Reconciling the dawn-dusk asymmetry in Mercury's exosphere with the micrometeoroid impact directionality

, 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 ...
Janches, Diego, Pokorný, Petr, Sarantos, Menelaos   +2 more
core   +1 more source

Sodium Atoms in the Lunar Exotail: Observed Velocity and Spatial Distributions [PDF]

, 2011
The lunar sodium tail extends long distances due to radiation pressure on sodium atoms in the lunar exosphere. Our earlier observations measured the average radial velocity of sodium atoms moving down the lunar tail beyond Earth (i.e., near the anti ...
E.J. Mierkiewicz, F.L. Roesler, Haffner, Huebner, J.K. Wilson, L.M. Haffner, Lee, Matta, Mendillo, Michael R. Line, Mierkiewicz, Mierkiewicz, Potter, Press, R.J. Oliversen, Smith, Stern, Tyler, Wilson, Wilson   +19 more
core   +4 more sources

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

The atmospheres of Mars and Venus [PDF]

, 1971
Of all the planets which may exist in the Universe, only nine have been studied by man. As a result, one cannot classify planets with the same confidence that one has in classifying stars; there is no theory of planetary evolution comparable in ...
Ingersoll, Andrew P., Leovy­, Conway B.
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

Asymmetries in Mars' Exosphere: Implications for X-ray and ENA Imaging

, 2006
Observations and simulations show that Mars' atmosphere has large seasonal variations. Total atmospheric density can have an order of magnitude latitudinal variation at exobase heights.
A.F. Nagy, J. Candy, J.A. Slavin, M. Holmström, M. Holmström, Mats Holmström, R.R Hodges Jr.   +6 more
core   +1 more source

Radiative braking in the extended exosphere of GJ436b

, 2015
The recent detection of a giant exosphere surrounding the warm Neptune GJ436 b has shed new light on the evaporation of close-in planets, revealing that moderately irradiated, low-mass exoplanets could make exceptional targets for studying this mechanism
Bourrier, Vincent, Ehrenreich, David, Etangs, Alain Lecavelier des   +2 more
core   +2 more sources

Modeling magnesium escape from HD209458b atmosphere [PDF]

, 2014
Transit observations in the MgI line of HD209458b revealed signatures of neutral magnesium escaping the upper atmosphere of the planet, while no atmospheric absorption was found in the MgII doublet.
Bourrier, V., Etangs, A. Lecavelier des, Vidal-Madjar, A.   +2 more
core   +2 more sources