Results 21 to 30 of about 113,851 (260)

Influence of Magnetic Fields on Precipitating Solar Wind Hydrogen at Mars

open access: yesGeophysical Research Letters, 2022
Solar wind protons can interact directly with the hydrogen corona of Mars through charge exchange, resulting in energetic neutral atoms (ENAs) able to penetrate deep into the upper atmosphere of Mars.
Sarah Henderson   +4 more
doaj   +1 more source

The Mars Topside Ionosphere Response to the X8.2 Solar Flare of 10 September 2017

open access: yesGeophysical Research Letters, 2018
On 10 September 2017, irradiance from a magnitude X8.2 solar flare impacted Mars while the Mars Atmosphere and Volatile EvolutioN (MAVEN) orbiter was characterizing the Mars upper atmosphere.
E. M. B. Thiemann   +15 more
doaj   +1 more source

Constraints on the Size and Composition of the Ancient Martian Atmosphere from Coupled CO2–N2–Ar Isotopic Evolution Models

open access: yesThe Planetary Science Journal, 2023
Present-day Mars is cold and dry, but mineralogical and morphological evidence shows that liquid water existed on the surface of ancient Mars. In order to explain this evidence and assess ancient Mars’s habitability, one must understand the size and ...
Trent B. Thomas, Renyu Hu, Daniel Y. Lo
doaj   +1 more source

MAVEN Observations of the Interloop Magnetic Reconnections at Mars

open access: yesThe Astrophysical Journal, 2023
Magnetic reconnection between neighboring magnetic field loops, the so-called interloop reconnection, is a common process to drive flares in the solar atmosphere.
Guo Chen   +9 more
doaj   +1 more source

Variability of Bow Shock Location at Mars [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1999
Bow shock formation, in case the supersonic solar wind flow is hindered by the atmosphere of Mars, is investigated. The atoms newly ionized from the extensive neutral atmosphere of Mars are loaded to the solar wind.
Yu Yi, Eojin Kim, Yong Ha Kim, Jhoon Kim
doaj  

Retrieval of CO Relative Column Abundance in the Martian Thermosphere From FUV Disk Observations by EMM EMUS

open access: yesGeophysical Research Letters, 2022
Carbon monoxide (CO) is a sensitive tracer of the thermal profile and winds in Mars' middle atmosphere and the chemistry that balances CO2 in the whole atmosphere of Mars.
J. S. Evans   +15 more
doaj   +1 more source

Martian Proton Aurora Brightening Reveals Atmospheric Ion Loss Intensifying

open access: yesGeophysical Research Letters, 2023
The Martian proton aurora is a distinct aurora phenomenon resulting from the direct deposition of solar wind energy into Mars' dayside atmosphere. What solar wind parameters influence the aurora activity in the short term is yet unknown, as are the ...
Fei He   +12 more
doaj   +1 more source

Measurements of Forbush decreases at Mars: both by MSL on ground and by MAVEN in orbit

open access: yes, 2017
The Radiation Assessment Detector (RAD), on board Mars Science Laboratory's (MSL) Curiosity rover, has been measuring ground level particle fluxes along with the radiation dose rate at the surface of Mars since August 2012. Similar to neutron monitors at
Boettcher, Stephan   +15 more
core   +1 more source

The Atmospheres of Mars and Venus [PDF]

open access: yesAnnual Review of Astronomy and Astrophysics, 1961
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 development to the theory of stellar evolution.
Ingersoll, Andrew P.   +1 more
openaire   +3 more sources

Long-term variability of CO2 and O in the Mars upper atmosphere from MRO radio science data [PDF]

open access: yes, 2015
We estimate the annual variability of CO2 and O partial density using approximately 6years of Mars Reconnaissance Orbiter (MRO) radio science data from August 2006 to January 2012, which cover three full Martian years (from the northern hemisphere summer
Fricke, Susan K.   +6 more
core   +1 more source

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