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Voyager 2 Observations Near the Heliopause

Richardson, John D. and Belcher, John W. and Burlaga, Leonard F. and Cummings, Alan C. and Decker, Robert B. and Opher, Merav and Stone, Edward C. (2020) Voyager 2 Observations Near the Heliopause. Journal of Physics Conference Series, 1620 . Art. No. 012016. ISSN 1742-6588. doi:10.1088/1742-6596/1620/1/012016.

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This paper discusses plasma characteristics in the heliosheath region before the heliopause (HP), at the HP, and in the very local interstellar medium (VLISM). The Voyager 2 (V2) HP was a sharp boundary where the radial plasma currents went to background levels. The radial flow speeds derived from 53-85 keV (V1) and 28-43 keV (V2) ion data decreased about 2 years (8 AU) before the HP at V1 and V2. A speed decrease was not observed by the V2 plasma instrument until 160 days (1.5 AU) before the HP crossing when V2 entered the plasma boundary layer where the plasma density and 28-43 keV ion intensity increased. We determine the HP orientation based on the plasma flow and magnetic field data and show these observations are consistent with models predicting a blunt HP. Variations are observed in the currents observed in the VLISM; roll data from this region clearly show the plasma instrument observes the interstellar plasma and may be consistent with larger than expected VLISM temperatures near the HP.

Item Type:Article
Related URLs:
URLURL TypeDescription
Richardson, John D.0000-0003-4041-7540
Burlaga, Leonard F.0000-0002-5569-1553
Cummings, Alan C.0000-0002-3840-7696
Stone, Edward C.0000-0002-2010-5462
Additional Information:© 2020 Institute of Physics. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Accepted papers received: 10 August 2020; Published online: 30 September 2020. JDR was supported under NASA contract 959203 from the Jet Propulsion Laboratory to the Massachusetts Institute of Technology and NASA grant 80NSSC19K0260. RBD was supported by NASA contract NNN06AA01C. ECS and ACC were supported by NASA grant NNN12AA01C. ACC, RBD, MO, and JDR acknowledge support from NASA grant 18-DRIVE18_2-0029, Our Heliospheric Shield.
Group:Space Radiation Laboratory
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Record Number:CaltechAUTHORS:20201002-094021793
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Official Citation:John D. Richardson et al 2020 J. Phys.: Conf. Ser. 1620 012016
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:105751
Deposited By: Tony Diaz
Deposited On:02 Oct 2020 16:51
Last Modified:12 Jul 2022 16:56

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