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Title: The Influence of Polar Coronal Holes on the Polar ENA Flux Observed by IBEX

Abstract

Polar coronal holes (PCHs) fill the high-latitude heliosphere with fast solar wind during the minimum phase of the solar cycle. This leads to a hardening of the energy spectrum of the proton plasma in the inner heliosheath (IHS), observed as energetic neutral atoms (ENAs) by the Interstellar Boundary Explorer (IBEX). In particular, the highest-energy channel of the IBEX-Hi instrument (at 4.3 keV) is a very sensitive indicator of pretermination shock fast wind entering the IHS. Herein, we show that the 4.3 keV ENA flux observed from the ecliptic poles is well correlated with the area of the solar surface covered by PCHs throughout the solar cycle, which demonstrates the existence of a direct connection between coronal structure and the dynamic properties of the IHS.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [3]; ORCiD logo [4];  [2]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Polish Academy of Sciences (CBK PAN), Warsaw (Poland). Space Research Centre
  3. Univ. of Montana, Missoula, MT (United States)
  4. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  5. Princeton Univ., NJ (United States)
  6. Univ. of New Hampshire, Durham, NH (United States). Space Science Center
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); National Aeronautics and Space Administration (NASA); National Science Centre of Poland (NCN)
OSTI Identifier:
1601396
Report Number(s):
LA-UR-19-22264
Journal ID: ISSN 1538-4357; TRN: US2103636
Grant/Contract Number:  
89233218CNA000001; 2015-18-M-ST9-00036
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 879; Journal Issue: 1; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; heliospheric and magnetospheric physics; solar wind; Sun: corona; Sun: heliosphere

Citation Formats

Reisenfeld, Daniel Brett, Bzowski, Maciej, Funsten III, Herbert O., Janzen, Paul H., Karna, Nishu, Kubiak, Marzena A., McComas, David J., Schwadron, Nathan A., and Sokół, Justyna M. The Influence of Polar Coronal Holes on the Polar ENA Flux Observed by IBEX. United States: N. p., 2019. Web. doi:10.3847/1538-4357/ab22c0.
Reisenfeld, Daniel Brett, Bzowski, Maciej, Funsten III, Herbert O., Janzen, Paul H., Karna, Nishu, Kubiak, Marzena A., McComas, David J., Schwadron, Nathan A., & Sokół, Justyna M. The Influence of Polar Coronal Holes on the Polar ENA Flux Observed by IBEX. United States. https://doi.org/10.3847/1538-4357/ab22c0
Reisenfeld, Daniel Brett, Bzowski, Maciej, Funsten III, Herbert O., Janzen, Paul H., Karna, Nishu, Kubiak, Marzena A., McComas, David J., Schwadron, Nathan A., and Sokół, Justyna M. Wed . "The Influence of Polar Coronal Holes on the Polar ENA Flux Observed by IBEX". United States. https://doi.org/10.3847/1538-4357/ab22c0. https://www.osti.gov/servlets/purl/1601396.
@article{osti_1601396,
title = {The Influence of Polar Coronal Holes on the Polar ENA Flux Observed by IBEX},
author = {Reisenfeld, Daniel Brett and Bzowski, Maciej and Funsten III, Herbert O. and Janzen, Paul H. and Karna, Nishu and Kubiak, Marzena A. and McComas, David J. and Schwadron, Nathan A. and Sokół, Justyna M.},
abstractNote = {Polar coronal holes (PCHs) fill the high-latitude heliosphere with fast solar wind during the minimum phase of the solar cycle. This leads to a hardening of the energy spectrum of the proton plasma in the inner heliosheath (IHS), observed as energetic neutral atoms (ENAs) by the Interstellar Boundary Explorer (IBEX). In particular, the highest-energy channel of the IBEX-Hi instrument (at 4.3 keV) is a very sensitive indicator of pretermination shock fast wind entering the IHS. Herein, we show that the 4.3 keV ENA flux observed from the ecliptic poles is well correlated with the area of the solar surface covered by PCHs throughout the solar cycle, which demonstrates the existence of a direct connection between coronal structure and the dynamic properties of the IHS.},
doi = {10.3847/1538-4357/ab22c0},
journal = {The Astrophysical Journal (Online)},
number = 1,
volume = 879,
place = {United States},
year = {2019},
month = {6}
}

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Works referencing / citing this record: