Hot flow anomaly observed at Jupiter's bow shock

P. W. Valek; M. F. Thomsen; F. Allegrini; F. Bagenal; S. Bolton; J. Connerney; R. W. Ebert; R. Gladstone; W. S. Kurth; S. Levin; P. Louarn; B. Mauk; D. J. McComas; C. Pollock; M. Reno; J. R. Szalay; S. Weidner; R. J. Wilson

doi:10.1002/2017GL073175

Hot flow anomaly observed at Jupiter's bow shock

P. W. Valek, M. F. Thomsen, F. Allegrini, F. Bagenal, S. Bolton, J. Connerney, R. W. Ebert, R. Gladstone, W. S. Kurth, S. Levin, P. Louarn, B. Mauk, D. J. McComas, C. Pollock, M. Reno, J. R. Szalay, S. Weidner, R. J. Wilson

Astrophysical Sciences

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

A Hot Flow Anomaly (HFA) is created when an interplanetary current sheet interacts with a planetary bow shock. Previous studies have reported observing HFAs at Earth, Mercury, Venus, Mars, and Saturn. During Juno's approach to Jupiter, a number of its instruments operated in the solar wind. Prior to crossing into Jupiter's magnetosphere, Juno observed an HFA at Jupiter for the first time. This Jovian HFA shares most of the characteristics of HFAs seen at other planets. The notable exception is that the Jovian HFA is significantly larger than any HFA seen before. With an apparent size greater than 2 × 10⁶ km the Jovian HFA is orders of magnitude larger than those seen at the other planets. By comparing the size of the HFAs at the other planets with the Jovian HFA, we conclude that HFAs size scales with the size of planetary bow shocks that the interplanetary current sheet interacts with.

Original language	English (US)
Pages (from-to)	8107-8112
Number of pages	6
Journal	Geophysical Research Letters
Volume	44
Issue number	16
DOIs	https://doi.org/10.1002/2017GL073175
State	Published - Aug 28 2017

All Science Journal Classification (ASJC) codes

Geophysics
General Earth and Planetary Sciences

Keywords

Bow shock
Hot flow anomaly
Juno
Jupiter

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10.1002/2017GL073175

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Valek, P. W., Thomsen, M. F., Allegrini, F., Bagenal, F., Bolton, S., Connerney, J., Ebert, R. W., Gladstone, R., Kurth, W. S., Levin, S., Louarn, P., Mauk, B., McComas, D. J., Pollock, C., Reno, M., Szalay, J. R., Weidner, S., & Wilson, R. J. (2017). Hot flow anomaly observed at Jupiter's bow shock. Geophysical Research Letters, 44(16), 8107-8112. https://doi.org/10.1002/2017GL073175

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abstract = "A Hot Flow Anomaly (HFA) is created when an interplanetary current sheet interacts with a planetary bow shock. Previous studies have reported observing HFAs at Earth, Mercury, Venus, Mars, and Saturn. During Juno's approach to Jupiter, a number of its instruments operated in the solar wind. Prior to crossing into Jupiter's magnetosphere, Juno observed an HFA at Jupiter for the first time. This Jovian HFA shares most of the characteristics of HFAs seen at other planets. The notable exception is that the Jovian HFA is significantly larger than any HFA seen before. With an apparent size greater than 2 × 106 km the Jovian HFA is orders of magnitude larger than those seen at the other planets. By comparing the size of the HFAs at the other planets with the Jovian HFA, we conclude that HFAs size scales with the size of planetary bow shocks that the interplanetary current sheet interacts with.",

keywords = "Bow shock, Hot flow anomaly, Juno, Jupiter",

author = "Valek, {P. W.} and Thomsen, {M. F.} and F. Allegrini and F. Bagenal and S. Bolton and J. Connerney and Ebert, {R. W.} and R. Gladstone and Kurth, {W. S.} and S. Levin and P. Louarn and B. Mauk and McComas, {D. J.} and C. Pollock and M. Reno and Szalay, {J. R.} and S. Weidner and Wilson, {R. J.}",

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TY - JOUR

T1 - Hot flow anomaly observed at Jupiter's bow shock

AU - Valek, P. W.

AU - Thomsen, M. F.

AU - Allegrini, F.

AU - Bagenal, F.

AU - Bolton, S.

AU - Connerney, J.

AU - Ebert, R. W.

AU - Gladstone, R.

AU - Kurth, W. S.

AU - Levin, S.

AU - Louarn, P.

AU - Mauk, B.

AU - McComas, D. J.

AU - Pollock, C.

AU - Reno, M.

AU - Szalay, J. R.

AU - Weidner, S.

AU - Wilson, R. J.

PY - 2017/8/28

Y1 - 2017/8/28

N2 - A Hot Flow Anomaly (HFA) is created when an interplanetary current sheet interacts with a planetary bow shock. Previous studies have reported observing HFAs at Earth, Mercury, Venus, Mars, and Saturn. During Juno's approach to Jupiter, a number of its instruments operated in the solar wind. Prior to crossing into Jupiter's magnetosphere, Juno observed an HFA at Jupiter for the first time. This Jovian HFA shares most of the characteristics of HFAs seen at other planets. The notable exception is that the Jovian HFA is significantly larger than any HFA seen before. With an apparent size greater than 2 × 106 km the Jovian HFA is orders of magnitude larger than those seen at the other planets. By comparing the size of the HFAs at the other planets with the Jovian HFA, we conclude that HFAs size scales with the size of planetary bow shocks that the interplanetary current sheet interacts with.

AB - A Hot Flow Anomaly (HFA) is created when an interplanetary current sheet interacts with a planetary bow shock. Previous studies have reported observing HFAs at Earth, Mercury, Venus, Mars, and Saturn. During Juno's approach to Jupiter, a number of its instruments operated in the solar wind. Prior to crossing into Jupiter's magnetosphere, Juno observed an HFA at Jupiter for the first time. This Jovian HFA shares most of the characteristics of HFAs seen at other planets. The notable exception is that the Jovian HFA is significantly larger than any HFA seen before. With an apparent size greater than 2 × 106 km the Jovian HFA is orders of magnitude larger than those seen at the other planets. By comparing the size of the HFAs at the other planets with the Jovian HFA, we conclude that HFAs size scales with the size of planetary bow shocks that the interplanetary current sheet interacts with.

KW - Bow shock

KW - Hot flow anomaly

KW - Juno

KW - Jupiter

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Hot flow anomaly observed at Jupiter's bow shock

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