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Markus Fraenz - One of the best experts on this subject based on the ideXlab platform.

  • Capture of solar wind alpha-particles by the Martian Atmosphere
    2010
    Co-Authors: Gérard Chanteur, Eduard Dubinin, Ronan Modolo, Markus Fraenz
    Abstract:

    Integration along He test-particle trajectories in the self-consistent electromagnetic fields generated by threedimensional hybrid simulations of the solar wind/Mars interaction is used to evaluate the removal of solar wind alpha-particles due to charge-exchange processes with neutral species of the Martian exosphere. The total removal rate of solar wind He ions, transformed into either singly ionised or neutral helium, is equal to 6.7 x 10**23 s-1, which corresponds approximately to 30solar a-particles through the planetary cross-section. The deposition rate of helium neutral atoms, created by double electronic capture on exospheric oxygen, impacting the exobase, and penetrating below where it can be trapped, is about 1.5 x 10**23 s-1. That means an important contribution of the solar wind source to the helium balance of the Martian Atmosphere. The implantation of the solar helium into the Martian Atmosphere shows an asymmetry related to the orientation of the motional electric field of the solar wind.

  • Capture of solar wind alpha‐particles by the Martian Atmosphere
    Geophysical Research Letters, 2009
    Co-Authors: Gérard Chanteur, Eduard Dubinin, Ronan Modolo, Markus Fraenz
    Abstract:

    Integration along He++ test-particle trajectories in the self-consistent electromagnetic fields generated by three-dimensional hybrid simulations of the solar wind/Mars interaction is used to evaluate the removal of solar wind α-particles due to charge-exchange processes with neutral species of the Martian exosphere. The total removal rate of solar wind He++ ions, transformed into either singly ionised or neutral helium, is equal to 6.7 × 1023 s−1, which corresponds approximately to 30% of the flux of solar α-particles through the planetary cross-section. The deposition rate of helium neutral atoms, created by double electronic capture on exospheric oxygen, impacting the exobase, and penetrating below where it can be trapped, is about 1.5 × 1023 s−1. That means an important contribution of the solar wind source to the helium balance of the Martian Atmosphere. The implantation of the solar helium into the Martian Atmosphere shows an asymmetry related to the orientation of the motional electric field of the solar wind, −VSW × BIMF.

  • Capture of solar wind alpha-particles by the Martian Atmosphere
    Geophysical Research Letters, 2009
    Co-Authors: Gérard Chanteur, Eduard Dubinin, Ronan Modolo, Markus Fraenz
    Abstract:

    Integration along He++ test-particle trajectories in the self-consistent electromagnetic fields generated by three-dimensional hybrid simulations of the solar wind/Mars interaction is used to evaluate the removal of solar wind α-particles due to charge-exchange processes with neutral species of the Martian exosphere. The total removal rate of solar wind He++ ions, transformed into either singly ionised or neutral helium, is equal to 6.7 × 1023 s−1, which corresponds approximately to 30% of the flux of solar α-particles through the planetary cross-section. The deposition rate of helium neutral atoms, created by double electronic capture on exospheric oxygen, impacting the exobase, and penetrating below where it can be trapped, is about 1.5 × 1023 s−1. That means an important contribution of the solar wind source to the helium balance of the Martian Atmosphere. The implantation of the solar helium into the Martian Atmosphere shows an asymmetry related to the orientation of the motional electric field of the solar wind, −VSW × BIMF.

Gérard Chanteur - One of the best experts on this subject based on the ideXlab platform.

  • Capture of solar wind alpha-particles by the Martian Atmosphere
    2010
    Co-Authors: Gérard Chanteur, Eduard Dubinin, Ronan Modolo, Markus Fraenz
    Abstract:

    Integration along He test-particle trajectories in the self-consistent electromagnetic fields generated by threedimensional hybrid simulations of the solar wind/Mars interaction is used to evaluate the removal of solar wind alpha-particles due to charge-exchange processes with neutral species of the Martian exosphere. The total removal rate of solar wind He ions, transformed into either singly ionised or neutral helium, is equal to 6.7 x 10**23 s-1, which corresponds approximately to 30solar a-particles through the planetary cross-section. The deposition rate of helium neutral atoms, created by double electronic capture on exospheric oxygen, impacting the exobase, and penetrating below where it can be trapped, is about 1.5 x 10**23 s-1. That means an important contribution of the solar wind source to the helium balance of the Martian Atmosphere. The implantation of the solar helium into the Martian Atmosphere shows an asymmetry related to the orientation of the motional electric field of the solar wind.

  • Capture of solar wind alpha‐particles by the Martian Atmosphere
    Geophysical Research Letters, 2009
    Co-Authors: Gérard Chanteur, Eduard Dubinin, Ronan Modolo, Markus Fraenz
    Abstract:

    Integration along He++ test-particle trajectories in the self-consistent electromagnetic fields generated by three-dimensional hybrid simulations of the solar wind/Mars interaction is used to evaluate the removal of solar wind α-particles due to charge-exchange processes with neutral species of the Martian exosphere. The total removal rate of solar wind He++ ions, transformed into either singly ionised or neutral helium, is equal to 6.7 × 1023 s−1, which corresponds approximately to 30% of the flux of solar α-particles through the planetary cross-section. The deposition rate of helium neutral atoms, created by double electronic capture on exospheric oxygen, impacting the exobase, and penetrating below where it can be trapped, is about 1.5 × 1023 s−1. That means an important contribution of the solar wind source to the helium balance of the Martian Atmosphere. The implantation of the solar helium into the Martian Atmosphere shows an asymmetry related to the orientation of the motional electric field of the solar wind, −VSW × BIMF.

  • Capture of solar wind alpha-particles by the Martian Atmosphere
    Geophysical Research Letters, 2009
    Co-Authors: Gérard Chanteur, Eduard Dubinin, Ronan Modolo, Markus Fraenz
    Abstract:

    Integration along He++ test-particle trajectories in the self-consistent electromagnetic fields generated by three-dimensional hybrid simulations of the solar wind/Mars interaction is used to evaluate the removal of solar wind α-particles due to charge-exchange processes with neutral species of the Martian exosphere. The total removal rate of solar wind He++ ions, transformed into either singly ionised or neutral helium, is equal to 6.7 × 1023 s−1, which corresponds approximately to 30% of the flux of solar α-particles through the planetary cross-section. The deposition rate of helium neutral atoms, created by double electronic capture on exospheric oxygen, impacting the exobase, and penetrating below where it can be trapped, is about 1.5 × 1023 s−1. That means an important contribution of the solar wind source to the helium balance of the Martian Atmosphere. The implantation of the solar helium into the Martian Atmosphere shows an asymmetry related to the orientation of the motional electric field of the solar wind, −VSW × BIMF.

Eduard Dubinin - One of the best experts on this subject based on the ideXlab platform.

  • Capture of solar wind alpha-particles by the Martian Atmosphere
    2010
    Co-Authors: Gérard Chanteur, Eduard Dubinin, Ronan Modolo, Markus Fraenz
    Abstract:

    Integration along He test-particle trajectories in the self-consistent electromagnetic fields generated by threedimensional hybrid simulations of the solar wind/Mars interaction is used to evaluate the removal of solar wind alpha-particles due to charge-exchange processes with neutral species of the Martian exosphere. The total removal rate of solar wind He ions, transformed into either singly ionised or neutral helium, is equal to 6.7 x 10**23 s-1, which corresponds approximately to 30solar a-particles through the planetary cross-section. The deposition rate of helium neutral atoms, created by double electronic capture on exospheric oxygen, impacting the exobase, and penetrating below where it can be trapped, is about 1.5 x 10**23 s-1. That means an important contribution of the solar wind source to the helium balance of the Martian Atmosphere. The implantation of the solar helium into the Martian Atmosphere shows an asymmetry related to the orientation of the motional electric field of the solar wind.

  • Capture of solar wind alpha‐particles by the Martian Atmosphere
    Geophysical Research Letters, 2009
    Co-Authors: Gérard Chanteur, Eduard Dubinin, Ronan Modolo, Markus Fraenz
    Abstract:

    Integration along He++ test-particle trajectories in the self-consistent electromagnetic fields generated by three-dimensional hybrid simulations of the solar wind/Mars interaction is used to evaluate the removal of solar wind α-particles due to charge-exchange processes with neutral species of the Martian exosphere. The total removal rate of solar wind He++ ions, transformed into either singly ionised or neutral helium, is equal to 6.7 × 1023 s−1, which corresponds approximately to 30% of the flux of solar α-particles through the planetary cross-section. The deposition rate of helium neutral atoms, created by double electronic capture on exospheric oxygen, impacting the exobase, and penetrating below where it can be trapped, is about 1.5 × 1023 s−1. That means an important contribution of the solar wind source to the helium balance of the Martian Atmosphere. The implantation of the solar helium into the Martian Atmosphere shows an asymmetry related to the orientation of the motional electric field of the solar wind, −VSW × BIMF.

  • Capture of solar wind alpha-particles by the Martian Atmosphere
    Geophysical Research Letters, 2009
    Co-Authors: Gérard Chanteur, Eduard Dubinin, Ronan Modolo, Markus Fraenz
    Abstract:

    Integration along He++ test-particle trajectories in the self-consistent electromagnetic fields generated by three-dimensional hybrid simulations of the solar wind/Mars interaction is used to evaluate the removal of solar wind α-particles due to charge-exchange processes with neutral species of the Martian exosphere. The total removal rate of solar wind He++ ions, transformed into either singly ionised or neutral helium, is equal to 6.7 × 1023 s−1, which corresponds approximately to 30% of the flux of solar α-particles through the planetary cross-section. The deposition rate of helium neutral atoms, created by double electronic capture on exospheric oxygen, impacting the exobase, and penetrating below where it can be trapped, is about 1.5 × 1023 s−1. That means an important contribution of the solar wind source to the helium balance of the Martian Atmosphere. The implantation of the solar helium into the Martian Atmosphere shows an asymmetry related to the orientation of the motional electric field of the solar wind, −VSW × BIMF.

Ronan Modolo - One of the best experts on this subject based on the ideXlab platform.

  • Capture of solar wind alpha-particles by the Martian Atmosphere
    2010
    Co-Authors: Gérard Chanteur, Eduard Dubinin, Ronan Modolo, Markus Fraenz
    Abstract:

    Integration along He test-particle trajectories in the self-consistent electromagnetic fields generated by threedimensional hybrid simulations of the solar wind/Mars interaction is used to evaluate the removal of solar wind alpha-particles due to charge-exchange processes with neutral species of the Martian exosphere. The total removal rate of solar wind He ions, transformed into either singly ionised or neutral helium, is equal to 6.7 x 10**23 s-1, which corresponds approximately to 30solar a-particles through the planetary cross-section. The deposition rate of helium neutral atoms, created by double electronic capture on exospheric oxygen, impacting the exobase, and penetrating below where it can be trapped, is about 1.5 x 10**23 s-1. That means an important contribution of the solar wind source to the helium balance of the Martian Atmosphere. The implantation of the solar helium into the Martian Atmosphere shows an asymmetry related to the orientation of the motional electric field of the solar wind.

  • Capture of solar wind alpha‐particles by the Martian Atmosphere
    Geophysical Research Letters, 2009
    Co-Authors: Gérard Chanteur, Eduard Dubinin, Ronan Modolo, Markus Fraenz
    Abstract:

    Integration along He++ test-particle trajectories in the self-consistent electromagnetic fields generated by three-dimensional hybrid simulations of the solar wind/Mars interaction is used to evaluate the removal of solar wind α-particles due to charge-exchange processes with neutral species of the Martian exosphere. The total removal rate of solar wind He++ ions, transformed into either singly ionised or neutral helium, is equal to 6.7 × 1023 s−1, which corresponds approximately to 30% of the flux of solar α-particles through the planetary cross-section. The deposition rate of helium neutral atoms, created by double electronic capture on exospheric oxygen, impacting the exobase, and penetrating below where it can be trapped, is about 1.5 × 1023 s−1. That means an important contribution of the solar wind source to the helium balance of the Martian Atmosphere. The implantation of the solar helium into the Martian Atmosphere shows an asymmetry related to the orientation of the motional electric field of the solar wind, −VSW × BIMF.

  • Capture of solar wind alpha-particles by the Martian Atmosphere
    Geophysical Research Letters, 2009
    Co-Authors: Gérard Chanteur, Eduard Dubinin, Ronan Modolo, Markus Fraenz
    Abstract:

    Integration along He++ test-particle trajectories in the self-consistent electromagnetic fields generated by three-dimensional hybrid simulations of the solar wind/Mars interaction is used to evaluate the removal of solar wind α-particles due to charge-exchange processes with neutral species of the Martian exosphere. The total removal rate of solar wind He++ ions, transformed into either singly ionised or neutral helium, is equal to 6.7 × 1023 s−1, which corresponds approximately to 30% of the flux of solar α-particles through the planetary cross-section. The deposition rate of helium neutral atoms, created by double electronic capture on exospheric oxygen, impacting the exobase, and penetrating below where it can be trapped, is about 1.5 × 1023 s−1. That means an important contribution of the solar wind source to the helium balance of the Martian Atmosphere. The implantation of the solar helium into the Martian Atmosphere shows an asymmetry related to the orientation of the motional electric field of the solar wind, −VSW × BIMF.

Yung-ching Wang - One of the best experts on this subject based on the ideXlab platform.

  • cometary sputtering of the Martian Atmosphere during the siding spring encounter
    Icarus, 2016
    Co-Authors: Yung-ching Wang, Janet G. Luhmann, Ali Rahmati, François Leblanc, Robert E. Johnson, T E Cravens
    Abstract:

    Abstract With the approach of the close encounter of comet Siding Spring with Mars, possible influences on the Martian Atmosphere from the cometary coma are being explored. Here we describe the non-thermal atmospheric loss due to atmospheric sputtering produced by the impact of the coma material. We use an atmospheric sputtering model to simulate the effect of the incident neutral O and the pickup O + , produced by photodissociation of water and its products. With the relatively large encounter speed of 56 km/s at a close flyby altitude of ∼130,000 km, the sputtering escape rates from the coma can reach 2–3 times the incident gas fluxes. Thus, the passing of the cometary coma will lead to removal of Martian Atmosphere instead of mass loading. If the cometary outgassing rate reaches 10 28 s − 1 , the sputtering from the extended coma could remove about 10 tons of Martian gases and deposit about 1 ton of external cometary material into the Atmosphere during the one hour encounter. This implies that the cometary sputtering may have played a non-negligible role in Mars atmospheric evolution when this kind of cometary encounter may occur frequently in early Martian epochs.

  • Cometary sputtering of the Martian Atmosphere during the Siding Spring encounter
    Icarus, 2016
    Co-Authors: Yung-ching Wang, Janet G. Luhmann, Ali Rahmati, François Leblanc, Robert E. Johnson, Thomas E. Cravens
    Abstract:

    With the approach of the close encounter of comet Siding Spring with Mars, possible influences on the Martian Atmosphere from the cometary coma are being explored. Here we describe the non-thermal atmospheric loss due to atmospheric sputtering produced by the impact of the coma material. We use an atmospheric sputtering model to simulate the effect of the incident neutral O and the pickup O+, produced by photodissociation of water and its products. With the relatively large encounter speed of 56 km/s at a close flyby altitude of ∼ 130,000 km, the sputtering escape rates from the coma can reach 2 to 3 times the incident gas fluxes. Thus, the passing of the cometary coma will lead to removal of Martian Atmosphere instead of mass loading. If the cometary outgassing rate reaches 10View the MathML source the sputtering from the extended coma could remove about 10 tons of Martian gases and deposit about 1 ton of external cometary material into the Atmosphere during the one hour encounter. This implies that the cometary sputtering may have played a non-negligible role in Mars atmospheric evolution when this kind of cometary encounter may occur frequently in early Martian epochs.