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11 results on '"Brain, David Andrew"'

1. Statistical Analysis of Discrete Aurora on Mars: Variability with Magnetic Topology, Local Time and Season

Author

Chirakkil, Krishnaprasad, primary, Lillis, Robert James, additional, Deighan, Justin, additional, Chaffin, Michael Scott, additional, Jain, Sonal, additional, Brain, David Andrew, additional, Fillingim, Matthew O., additional, Susarla, Raghuram, additional, Holsclaw, Gregory, additional, Fang, Xiaohua, additional, Schneider, Nicholas M., additional, Almazmi, Hoor, additional, Almatroushi, Hessa, additional, Gacesa, Marko, additional, and El-Kork, Nayla, additional

Published
2024
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2. Solar and solar wind energy drivers for O+ and O2+ ion escape at Mars

Author

Schnepf, Neesha Regmi, primary, Dong, Yaxue, additional, Brain, David Andrew, additional, Hanley, Kathleen Gwen, additional, Peterson, William K., additional, Strangeway, Robert J, additional, Thiemann, Edward Michael Benjamin, additional, Halekas, Jasper S., additional, Espley, Jared Randolph, additional, Eparvier, Francis G., additional, and Mcfadden, James P., additional

Published
2024
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4. EMM EMUS Observations of Hot Oxygen Corona at Mars: Radial Distribution and Temporal Variability

Author

Chirakkil, Krishnaprasad, primary, Deighan, Justin, additional, Chaffin, Michael Scott, additional, Jain, Sonal, additional, Lillis, Robert James, additional, Raghuram, Susarla, additional, Holsclaw, Gregory, additional, Brain, David Andrew, additional, Thiemann, Edward Michael Benjamin, additional, Chamberlin, Phillip C, additional, Fillingim, Matthew O., additional, Evans, Joseph Scott, additional, England, Scott L, additional, Almatroushi, Hessa, additional, Almazmi, Hoor, additional, Eparvier, Francis G., additional, Gacesa, Marko, additional, El-Kork, Nayla, additional, and Curry, Shannon M., additional

Published
2023
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5. Temporal Variability of Waves at the Proton Cyclotron Frequency Upstream from Mars: Implications for Mars Distant Hydrogen Exosphere

Author

Bertucci, Cesar, Romanelli, Norberto, Chaufray, Jean-Yves, Gomez, Daniel, Mazelle, Christian, Delva, Magda, Modolo, Ronan, Gonzalez-Galindo, Francisco, and Brain, David Andrew

Subjects
Physics - Space Physics
Abstract

We report on the temporal variability of the occurrence of waves at the local proton cyclotron frequency upstream from the Martian bow shock from Mars Global Surveyor observations during the first aerobraking and science phasing orbit periods. Observations at high southern latitudes during minimum-to-mean solar activity show that the wave occurrence rate is significantly higher around perihelion southern summer solstice and lower around the same hemisphere's spring and autumn equinoxes. A similar trend is observed in the hydrogen (H) exospheric density profiles over the Martian South Pole obtained from a model including UV thermospheric heating effects. In spite of the complexity in the ion pick-up and plasma wave generation and evolution processes, these results support the idea that variations in the occurrence of waves could be used to study the temporal evolution of the distant Martian H corona and its coupling with the thermosphere at altitudes currently inaccessible to direct measurements., Comment: 16 pages, 2 figures, Submitted to Geophysical Research Letters

Published
2013
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6. Solar and solar wind energy drivers for O+ and O2+ ion escape at Mars

Author

Schnepf, Neesha Regmi, primary, Dong, Yaxue, additional, Brain, David Andrew, additional, Hanley, Kathleen Gwen, additional, Peterson, William K., additional, Strangeway, Robert J, additional, Thiemann, Edward Michael Benjamin, additional, Halekas, Jasper S., additional, Espley, Jared Randolph, additional, Eparvier, Francis G., additional, and Mcfadden, James P., additional

Published
2023
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10. Properties of Plasma Waves Observed Upstream from Mars

Author

Halekas, Jasper S., primary, Ruhunusiri, Suranga, additional, Vaisberg, Oleg L, additional, Harada, Yuki, additional, Espley, Jared, additional, Mitchell, David L., additional, Mazelle, Christian, additional, Romanelli, Norberto, additional, DiBraccio, Gina A., additional, and Brain, David Andrew, additional

Published
2020
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11. Characterizing Mars' magnetotail topology with respect to the upstream interplanetary magnetic fields

Author

Xu, Shaosui, primary, Mitchell, David L., additional, Weber, Tristan, additional, Brain, David Andrew, additional, Luhmann, Janet G, additional, Dong, Chuanfei, additional, Curry, Shannon M., additional, Ma, Ying Juan, additional, DiBraccio, Gina A., additional, Halekas, Jasper S., additional, Dong, Yaxue, additional, and Mazelle, Christian Xavier, additional

Published
2019
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