Location of the bow shock and ion composition boundaries at Venus - initial determinations from Venus Express ASPERA-4

C. Martinecz; M. Franz; J. Woch; N. Krupp; E. Roussos; E. Dubinin; U. Motschmann; S. Barabash; R. Lundin; M. Holmstrom; H. Andersson; M. Yamauchi; A. Grigoriev; Y. Futaana; K. Brinkfeldt; H. Gunell; R. A. Frahm; J. D. Winningham; J. R. Sharber; J. Scherrer; A. J. Coates; D. R. Linder; D. O. Kataria; E. Kallio; T. Sales; W. Schmidt; P. Riihela; H. E. J. Koskinen; J. U. Kozyra; J. Luhmann; C. T. Russell; E. C. Roelof; P. Brandt; C. C. Curtis; K. C. Hsieh; B. R. Sandell; M. Grande; J. A. Sauvaud; A. Fedorov; J. Thocaven; C. Mazelle; S. McKenna-Lawler; S. Orsini; R. Cerulli-Irelli; M. Maggi; A. Mura; A. Milillo; P. Wurz; A. Galli; P. Bochsler; K. Asamura; K. Szego; W. Baumjohann; T. L. Zhang; H. Lammer

Location of the bow shock and ion composition boundaries at Venus - initial determinations from Venus Express ASPERA-4

C. Martinecz, M. Franz, J. Woch, N. Krupp, E. Roussos, E. Dubinin, U. Motschmann, S. Barabash, R. Lundin, M. Holmstrom, H. Andersson, M. Yamauchi, A. Grigoriev, Y. Futaana, K. Brinkfeldt, H. Gunell, R. A. Frahm, J. D. Winningham, J. R. Sharber, J. ScherrerA. J. Coates, D. R. Linder, D. O. Kataria, E. Kallio, T. Sales, W. Schmidt, P. Riihela, H. E. J. Koskinen, J. U. Kozyra, J. Luhmann, C. T. Russell, E. C. Roelof, P. Brandt, C. C. Curtis, K. C. Hsieh, B. R. Sandell, M. Grande, J. A. Sauvaud, A. Fedorov, J. Thocaven, C. Mazelle, S. McKenna-Lawler, S. Orsini, R. Cerulli-Irelli, M. Maggi, A. Mura, A. Milillo, P. Wurz, A. Galli, P. Bochsler, K. Asamura, K. Szego, W. Baumjohann, T. L. Zhang, H. Lammer

Department of Physics

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Abstract

For the first time since 1992 when the Pioneer Venus Orbiter (PVO) ceased to operate, there is again a plasma instrument in orbit around Venus, namely the ASPERA-4 flown on Venus Express (inserted into an elliptical polar orbit about the planet on April 11, 2006). In this paper we report on measurements made by the ion and electron sensors of ASPERA-4 during their first five months of operation and, thereby, determine the locations of both the Venus bow shock (BS) and the ion composition boundary (ICB) under solar minimum conditions. In contrast to previous studies based on PVO data, we employ a 3-parameter fit to achieve a realistic shape for the BS. We use a different technique to fit the ICB because this latter boundary cannot be represented by a conic section. Additionally we investigate the dependence of the location of the BS on solar wind ram pressure (based on ASPERA-4 solar wind data) and solar EUV flux (using a proxy from Earth).

Original language	English
Pages (from-to)	780-784
Number of pages	5
Journal	Planetary and Space Science
Volume	56
Issue number	6
Publication status	Published - 31 May 2008

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Martinecz, C., Franz, M., Woch, J., Krupp, N., Roussos, E., Dubinin, E., Motschmann, U., Barabash, S., Lundin, R., Holmstrom, M., Andersson, H., Yamauchi, M., Grigoriev, A., Futaana, Y., Brinkfeldt, K., Gunell, H., Frahm, R. A., Winningham, J. D., Sharber, J. R., ... Lammer, H. (2008). Location of the bow shock and ion composition boundaries at Venus - initial determinations from Venus Express ASPERA-4. Planetary and Space Science, 56(6), 780-784.

@article{a3189ce395ff4f17817e1aea4213dfc1,

title = "Location of the bow shock and ion composition boundaries at Venus - initial determinations from Venus Express ASPERA-4",

abstract = "For the first time since 1992 when the Pioneer Venus Orbiter (PVO) ceased to operate, there is again a plasma instrument in orbit around Venus, namely the ASPERA-4 flown on Venus Express (inserted into an elliptical polar orbit about the planet on April 11, 2006). In this paper we report on measurements made by the ion and electron sensors of ASPERA-4 during their first five months of operation and, thereby, determine the locations of both the Venus bow shock (BS) and the ion composition boundary (ICB) under solar minimum conditions. In contrast to previous studies based on PVO data, we employ a 3-parameter fit to achieve a realistic shape for the BS. We use a different technique to fit the ICB because this latter boundary cannot be represented by a conic section. Additionally we investigate the dependence of the location of the BS on solar wind ram pressure (based on ASPERA-4 solar wind data) and solar EUV flux (using a proxy from Earth).",

author = "C. Martinecz and M. Franz and J. Woch and N. Krupp and E. Roussos and E. Dubinin and U. Motschmann and S. Barabash and R. Lundin and M. Holmstrom and H. Andersson and M. Yamauchi and A. Grigoriev and Y. Futaana and K. Brinkfeldt and H. Gunell and Frahm, {R. A.} and Winningham, {J. D.} and Sharber, {J. R.} and J. Scherrer and Coates, {A. J.} and Linder, {D. R.} and Kataria, {D. O.} and E. Kallio and T. Sales and W. Schmidt and P. Riihela and Koskinen, {H. E. J.} and Kozyra, {J. U.} and J. Luhmann and Russell, {C. T.} and Roelof, {E. C.} and P. Brandt and Curtis, {C. C.} and Hsieh, {K. C.} and Sandell, {B. R.} and M. Grande and Sauvaud, {J. A.} and A. Fedorov and J. Thocaven and C. Mazelle and S. McKenna-Lawler and S. Orsini and R. Cerulli-Irelli and M. Maggi and A. Mura and A. Milillo and P. Wurz and A. Galli and P. Bochsler and K. Asamura and K. Szego and W. Baumjohann and Zhang, {T. L.} and H. Lammer",

note = "specialissue: Mars Express/Venus Express ",

year = "2008",

month = may,

day = "31",

language = "English",

volume = "56",

pages = "780--784",

journal = "Planetary and Space Science",

issn = "0032-0633",

publisher = "Elsevier",

number = "6",

}

Martinecz, C, Franz, M, Woch, J, Krupp, N, Roussos, E, Dubinin, E, Motschmann, U, Barabash, S, Lundin, R, Holmstrom, M, Andersson, H, Yamauchi, M, Grigoriev, A, Futaana, Y, Brinkfeldt, K, Gunell, H, Frahm, RA, Winningham, JD, Sharber, JR, Scherrer, J, Coates, AJ, Linder, DR, Kataria, DO, Kallio, E, Sales, T, Schmidt, W, Riihela, P, Koskinen, HEJ, Kozyra, JU, Luhmann, J, Russell, CT, Roelof, EC, Brandt, P, Curtis, CC, Hsieh, KC, Sandell, BR, Grande, M, Sauvaud, JA, Fedorov, A, Thocaven, J, Mazelle, C, McKenna-Lawler, S, Orsini, S, Cerulli-Irelli, R, Maggi, M, Mura, A, Milillo, A, Wurz, P, Galli, A, Bochsler, P, Asamura, K, Szego, K, Baumjohann, W, Zhang, TL & Lammer, H 2008, 'Location of the bow shock and ion composition boundaries at Venus - initial determinations from Venus Express ASPERA-4', Planetary and Space Science, vol. 56, no. 6, pp. 780-784.

TY - JOUR

T1 - Location of the bow shock and ion composition boundaries at Venus - initial determinations from Venus Express ASPERA-4

AU - Martinecz, C.

AU - Franz, M.

AU - Woch, J.

AU - Krupp, N.

AU - Roussos, E.

AU - Dubinin, E.

AU - Motschmann, U.

AU - Barabash, S.

AU - Lundin, R.

AU - Holmstrom, M.

AU - Andersson, H.

AU - Yamauchi, M.

AU - Grigoriev, A.

AU - Futaana, Y.

AU - Brinkfeldt, K.

AU - Gunell, H.

AU - Frahm, R. A.

AU - Winningham, J. D.

AU - Sharber, J. R.

AU - Scherrer, J.

AU - Coates, A. J.

AU - Linder, D. R.

AU - Kataria, D. O.

AU - Kallio, E.

AU - Sales, T.

AU - Schmidt, W.

AU - Riihela, P.

AU - Koskinen, H. E. J.

AU - Kozyra, J. U.

AU - Luhmann, J.

AU - Russell, C. T.

AU - Roelof, E. C.

AU - Brandt, P.

AU - Curtis, C. C.

AU - Hsieh, K. C.

AU - Sandell, B. R.

AU - Grande, M.

AU - Sauvaud, J. A.

AU - Fedorov, A.

AU - Thocaven, J.

AU - Mazelle, C.

AU - McKenna-Lawler, S.

AU - Orsini, S.

AU - Cerulli-Irelli, R.

AU - Maggi, M.

AU - Mura, A.

AU - Milillo, A.

AU - Wurz, P.

AU - Galli, A.

AU - Bochsler, P.

AU - Asamura, K.

AU - Szego, K.

AU - Baumjohann, W.

AU - Zhang, T. L.

AU - Lammer, H.

N1 - specialissue: Mars Express/Venus Express

PY - 2008/5/31

Y1 - 2008/5/31

N2 - For the first time since 1992 when the Pioneer Venus Orbiter (PVO) ceased to operate, there is again a plasma instrument in orbit around Venus, namely the ASPERA-4 flown on Venus Express (inserted into an elliptical polar orbit about the planet on April 11, 2006). In this paper we report on measurements made by the ion and electron sensors of ASPERA-4 during their first five months of operation and, thereby, determine the locations of both the Venus bow shock (BS) and the ion composition boundary (ICB) under solar minimum conditions. In contrast to previous studies based on PVO data, we employ a 3-parameter fit to achieve a realistic shape for the BS. We use a different technique to fit the ICB because this latter boundary cannot be represented by a conic section. Additionally we investigate the dependence of the location of the BS on solar wind ram pressure (based on ASPERA-4 solar wind data) and solar EUV flux (using a proxy from Earth).

AB - For the first time since 1992 when the Pioneer Venus Orbiter (PVO) ceased to operate, there is again a plasma instrument in orbit around Venus, namely the ASPERA-4 flown on Venus Express (inserted into an elliptical polar orbit about the planet on April 11, 2006). In this paper we report on measurements made by the ion and electron sensors of ASPERA-4 during their first five months of operation and, thereby, determine the locations of both the Venus bow shock (BS) and the ion composition boundary (ICB) under solar minimum conditions. In contrast to previous studies based on PVO data, we employ a 3-parameter fit to achieve a realistic shape for the BS. We use a different technique to fit the ICB because this latter boundary cannot be represented by a conic section. Additionally we investigate the dependence of the location of the BS on solar wind ram pressure (based on ASPERA-4 solar wind data) and solar EUV flux (using a proxy from Earth).

UR - http://hdl.handle.net/2160/8325

M3 - Special Issue

SN - 0032-0633

VL - 56

SP - 780

EP - 784

JO - Planetary and Space Science

JF - Planetary and Space Science

IS - 6

ER -

Location of the bow shock and ion composition boundaries at Venus - initial determinations from Venus Express ASPERA-4

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