Results 131 to 140 of about 6,063 (251)

Observations of Al, Fe and Ca(+) in Mercury's Exosphere [PDF]

, 2011
We report 5-(sigma) tangent column detections of Al and Fe, and strict 3-(sigma) tangent column upper limits for Ca(+) in Mercury's exosphere obtained using the HIRES spectrometer on the Keck I telescope.
Bida, Thomas A., Killen, Rosemary M.
core   +1 more source

Tomographic Reconstruction of Mercury's Exosphere from MESSENGER Flyby Data [PDF]

, 2011
The exosphere of Mercury is among the best-studied examples of a common type of atmosphere, a surface-bounded exosphere. Mercury's exosphere was probed in 2008-2009 with Ultraviolet and Visible Spectrometer (UVVS) measurements obtained during three ...
Solomon, Sean C., Slavin, James A., Vervack, Ronald J., Jr., Killen, Rosemary M., McClintock, William E.   +4 more
core   +1 more source

Thermally Driven Atmospheric Escape: Transition from Diffusion-limited to Drag-off Escape

The Planetary Science Journal
We examine the transition from diffusion-limited to drag-off escape using a direct simulation Monte Carlo (DSMC) model developed to simulate planetary atmospheres, referred to as Harrah.
Jack C. Evans, Shane Robert Carberry Mogan, Robert E. Johnson, Orenthal J. Tucker   +3 more
doaj   +1 more source

Volatiles and Refractories in Surface-Bounded Exospheres in the Inner Solar System. [PDF]

Space Sci Rev, 2021
Grava C, Killen RM, Benna M, Berezhnoy AA, Halekas JS, Leblanc F, Nishino MN, Plainaki C, Raines JM, Sarantos M, Teolis BD, Tucker OJ, Vervack RJ, Vorburger A.   +13 more
europepmc   +1 more source

Calcium in Mercury's Exosphere: Modeling MESSENGER Data [PDF]

, 2011
Mercury is surrounded by a surface-bounded exosphere comprised of atomic species including hydrogen, sodium, potassium, calcium, magnesium, and likely oxygen. Because it is collisionless.
Vervack, Ronald J., Merkel, Aimee, Sarantos, Menelaos, Killen, Rosemary M., Burger, Matthew H., McClintock, William E., Sprague, Ann L.   +6 more
core   +1 more source

Modeling exospheres: analytical and numerical methods with application examples

Frontiers in Astronomy and Space Sciences
Exospheres, the tenuous gas environments surrounding planets, planetary satellites, and cometary comae, play a significant role in mediating the interactions of these astronomical bodies with their surrounding space environments.
Valeriy Tenishev, Yinsi Shou, Yuni Lee, Yuni Lee, Yingjuan Ma, Michael R. Combi   +5 more
doaj   +1 more source

Correlation between Lunar Surface and Exospheric Sodium: Effects of Albedo-driven Temperature on Multilayer Sodium Reservoirs Rather than Surface Abundance Variations

The Astrophysical Journal
Sodium (Na) is a moderately volatile element in the lunar exosphere, released from the surface through thermal and nonthermal processes. We present a combined analysis of Chandrayaan-2 CLASS surface Na abundance, LADEE Ultraviolet–Visible Spectrometer ...
A. Devaraj, S. Narendranath, Sreeja. S. Kartha, Netra S. Pillai   +3 more
doaj   +1 more source

Charon's refractory factory. [PDF]

Sci Adv, 2022
Raut U, Teolis BD, Kammer JA, Gimar CJ, Brody JS, Gladstone GR, Howett CJA, Protopapa S, Retherford KD.   +8 more
europepmc   +1 more source

Observations of Metallic Species in Mercury's Exosphere [PDF]

, 2010
From observations of the metallic species sodium (Na), potassium (K), and magnesium (Mg) in Mercury's exosphere, we derive implications for source and loss processes.
Anderson, Carrie M., Potter, Andrew E., Vervack, Ronald J., Jr., Killen, Rosemary M., Burger, Matthew H., Bradley, E. Todd, McClintock, William E.   +6 more
core   +1 more source

Hydrogen-bearing vesicles in space weathered lunar calcium-phosphates. [PDF]

Commun Earth Environ, 2023
Burgess KD, Cymes BA, Stroud RM.
europepmc   +1 more source