Solar wind interactions with Comet 19P/Borrelly

D. T. Young; F. J. Crary; J. E. Nordholt; F. Bagenal; D. Boice; J. L. Burch; A. Eviatar; R. Goldstein; J. J. Hanley; D. J. Lawrence; D. J. McComas; R. Meier; D. Reisenfeld; K. Sauer; R. C. Wiens

doi:10.1016/j.icarus.2003.09.011

Solar wind interactions with Comet 19P/Borrelly

D. T. Young, F. J. Crary, J. E. Nordholt, F. Bagenal, D. Boice, J. L. Burch, A. Eviatar, R. Goldstein, J. J. Hanley, D. J. Lawrence, D. J. McComas, R. Meier, D. Reisenfeld, K. Sauer, R. C. Wiens

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46 Scopus citations

Abstract

The Plasma Experiment for Planetary Exploration (PEPE) made detailed observations of the plasma environment of Comet 19P/Borrelly during the Deep Space (DS1) flyby on September 22, 2001. Several distinct regions and boundaries have been identified on both inbound and outbound trajectories, including an upstream region of decelerated solar wind plasma and cometary ion pickup, the cometary bow shock, a sheath of heated and mixed solar wind and cometary ions, and a collisional inner coma dominated by cometary ions. All of these features were significantly offset to the north of the nucleus-Sun line, suggesting that the coma itself produces this offset, possibly because of well-collimated large dayside jets directed 8°-10° northward from the nucleus as observed by the DS1 MICAS camera. The maximum observed ion density was 1640 ion/cm³ at a distance of 2650 km from the nucleus while the flow speed dropped from 360 km/s in the solar wind to 8 km/s at closest approach. Preliminary analysis of PEPE mass spectra suggest that the ratio of CO⁺/H₂O⁺ is lower than that observed with Giotto at 1P/Halley.

Original language	English (US)
Pages (from-to)	80-88
Number of pages	9
Journal	Icarus
Volume	167
Issue number	1
DOIs	https://doi.org/10.1016/j.icarus.2003.09.011
State	Published - Jan 2004
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Comets, composition
Comets, dynamics
Solar wind

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10.1016/j.icarus.2003.09.011

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@article{da23fc62a8074b3783b24189d7912d53,

title = "Solar wind interactions with Comet 19P/Borrelly",

abstract = "The Plasma Experiment for Planetary Exploration (PEPE) made detailed observations of the plasma environment of Comet 19P/Borrelly during the Deep Space (DS1) flyby on September 22, 2001. Several distinct regions and boundaries have been identified on both inbound and outbound trajectories, including an upstream region of decelerated solar wind plasma and cometary ion pickup, the cometary bow shock, a sheath of heated and mixed solar wind and cometary ions, and a collisional inner coma dominated by cometary ions. All of these features were significantly offset to the north of the nucleus-Sun line, suggesting that the coma itself produces this offset, possibly because of well-collimated large dayside jets directed 8°-10° northward from the nucleus as observed by the DS1 MICAS camera. The maximum observed ion density was 1640 ion/cm3 at a distance of 2650 km from the nucleus while the flow speed dropped from 360 km/s in the solar wind to 8 km/s at closest approach. Preliminary analysis of PEPE mass spectra suggest that the ratio of CO+/H2O+ is lower than that observed with Giotto at 1P/Halley.",

keywords = "Comets, composition, Comets, dynamics, Solar wind",

author = "Young, {D. T.} and Crary, {F. J.} and Nordholt, {J. E.} and F. Bagenal and D. Boice and Burch, {J. L.} and A. Eviatar and R. Goldstein and Hanley, {J. J.} and Lawrence, {D. J.} and McComas, {D. J.} and R. Meier and D. Reisenfeld and K. Sauer and Wiens, {R. C.}",

note = "Funding Information: We thank Southwest Research Institute (IR project 15.R9771) and Los Alamos National Laboratory/Department of Energy (WO-9165), which supported initial research and development of the PEPE instrument. We also express our thanks to many exceptional engineers and technicians at Southwest Research Institute, Los Alamos National Laboratory, and the Jet Propulsion Laboratory for their dedication to the development and operation of the PEPE instrument. We also thank S.P. Gary and M.F. Thomsen of Los Alamos for their support. PEPE development, operations, and (minimal) data analysis were supported by NASA and the Jet Propulsion Laboratory under contracts 960439, 960619, 961207 to Southwest Research Institute, Agreement #DE-FI04-00AL66167 with LANL, and 1216657 to the University of Michigan.",

year = "2004",

month = jan,

doi = "10.1016/j.icarus.2003.09.011",

language = "English (US)",

volume = "167",

pages = "80--88",

journal = "Icarus",

issn = "0019-1035",

publisher = "Academic Press Inc.",

number = "1",

}

TY - JOUR

T1 - Solar wind interactions with Comet 19P/Borrelly

AU - Young, D. T.

AU - Crary, F. J.

AU - Nordholt, J. E.

AU - Bagenal, F.

AU - Boice, D.

AU - Burch, J. L.

AU - Eviatar, A.

AU - Goldstein, R.

AU - Hanley, J. J.

AU - Lawrence, D. J.

AU - McComas, D. J.

AU - Meier, R.

AU - Reisenfeld, D.

AU - Sauer, K.

AU - Wiens, R. C.

N1 - Funding Information: We thank Southwest Research Institute (IR project 15.R9771) and Los Alamos National Laboratory/Department of Energy (WO-9165), which supported initial research and development of the PEPE instrument. We also express our thanks to many exceptional engineers and technicians at Southwest Research Institute, Los Alamos National Laboratory, and the Jet Propulsion Laboratory for their dedication to the development and operation of the PEPE instrument. We also thank S.P. Gary and M.F. Thomsen of Los Alamos for their support. PEPE development, operations, and (minimal) data analysis were supported by NASA and the Jet Propulsion Laboratory under contracts 960439, 960619, 961207 to Southwest Research Institute, Agreement #DE-FI04-00AL66167 with LANL, and 1216657 to the University of Michigan.

PY - 2004/1

Y1 - 2004/1

N2 - The Plasma Experiment for Planetary Exploration (PEPE) made detailed observations of the plasma environment of Comet 19P/Borrelly during the Deep Space (DS1) flyby on September 22, 2001. Several distinct regions and boundaries have been identified on both inbound and outbound trajectories, including an upstream region of decelerated solar wind plasma and cometary ion pickup, the cometary bow shock, a sheath of heated and mixed solar wind and cometary ions, and a collisional inner coma dominated by cometary ions. All of these features were significantly offset to the north of the nucleus-Sun line, suggesting that the coma itself produces this offset, possibly because of well-collimated large dayside jets directed 8°-10° northward from the nucleus as observed by the DS1 MICAS camera. The maximum observed ion density was 1640 ion/cm3 at a distance of 2650 km from the nucleus while the flow speed dropped from 360 km/s in the solar wind to 8 km/s at closest approach. Preliminary analysis of PEPE mass spectra suggest that the ratio of CO+/H2O+ is lower than that observed with Giotto at 1P/Halley.

AB - The Plasma Experiment for Planetary Exploration (PEPE) made detailed observations of the plasma environment of Comet 19P/Borrelly during the Deep Space (DS1) flyby on September 22, 2001. Several distinct regions and boundaries have been identified on both inbound and outbound trajectories, including an upstream region of decelerated solar wind plasma and cometary ion pickup, the cometary bow shock, a sheath of heated and mixed solar wind and cometary ions, and a collisional inner coma dominated by cometary ions. All of these features were significantly offset to the north of the nucleus-Sun line, suggesting that the coma itself produces this offset, possibly because of well-collimated large dayside jets directed 8°-10° northward from the nucleus as observed by the DS1 MICAS camera. The maximum observed ion density was 1640 ion/cm3 at a distance of 2650 km from the nucleus while the flow speed dropped from 360 km/s in the solar wind to 8 km/s at closest approach. Preliminary analysis of PEPE mass spectra suggest that the ratio of CO+/H2O+ is lower than that observed with Giotto at 1P/Halley.

KW - Comets, composition

KW - Comets, dynamics

KW - Solar wind

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U2 - 10.1016/j.icarus.2003.09.011

DO - 10.1016/j.icarus.2003.09.011

M3 - Article

AN - SCOPUS:1642420532

SN - 0019-1035

VL - 167

SP - 80

EP - 88

JO - Icarus

JF - Icarus

IS - 1

ER -

Solar wind interactions with Comet 19P/Borrelly

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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