Local interstellar magnetic field determined from the interstellar boundary explorer ribbon

Zirnstein, E. J.; Heerikhuisen, J.; Funsten, H. O.; Livadiotis, G.; McComas, D. J.; Pogorelov, N. V.

doi:10.3847/2041-8205/818/1/L18

Local interstellar magnetic field determined from the interstellar boundary explorer ribbon

Journal Article · Mon Feb 08 00:00:00 EST 2016 · The Astrophysical Journal. Letters (Online)

DOI:https://doi.org/10.3847/2041-8205/818/1/L18· OSTI ID:1326081

^[1]; Heerikhuisen, J. ^[2]; ^[3]; Livadiotis, G. ^[4]; McComas, D. J. ^[5]; ^[2]

Southwest Research Inst. (SwRI), San Antonio, TX (United States); University of Alabama in Huntsville
Univ. of Alabama, Huntsville, AL (United States). Dept. of Space Science
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Southwest Research Inst. (SwRI), San Antonio, TX (United States)
Southwest Research Inst. (SwRI), San Antonio, TX (United States); Univ. of Texas, San Antonio, TX (United States)

The solar wind emanating from the Sun interacts with the local interstellar medium (LISM), forming the heliosphere. Hydrogen energetic neutral atoms (ENAs) produced by the solar-interstellar interaction carry important information about plasma properties from the boundaries of the heliosphere, and are currently being measured by NASA's Interstellar Boundary Explorer (IBEX). IBEX observations show the existence of a “ribbon” of intense ENA emission projecting a circle on the celestial sphere that is centered near the local interstellar magnetic field (ISMF) vector. Here we show that the source of the IBEX ribbon as a function of ENA energy outside the heliosphere, uniquely coupled to the draping of the ISMF around the heliopause, can be used to precisely determine the magnitude (2.93 ± 0.08 μG) and direction (227.°28 ± 0.°69, 34.°62 ± 0.°45 in ecliptic longitude and latitude) of the pristine ISMF far (~1000 AU) from the Sun. We find that the ISMF vector is offset from the ribbon center by ~8.°3 toward the direction of motion of the heliosphere through the LISM, and their vectors form a plane that is consistent with the direction of deflected interstellar neutral hydrogen, thought to be controlled by the ISMF. Lastly, our results yield draped ISMF properties close to that observed by Voyager 1, the only spacecraft to directly measure the ISMF close to the heliosphere, and give predictions of the pristine ISMF that Voyager 1 has yet to sample.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Alabama, Huntsville, AL (United States)

Sponsoring Organization:: NASA; National Aeronautic and Space Administration (NASA); National Science Foundation (NSF); USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)

Grant/Contract Number:: SC0008334

OSTI ID:: 1326081

Alternate ID(s):: OSTI ID: 22518613

Journal Information:: The Astrophysical Journal. Letters (Online), Journal Name: The Astrophysical Journal. Letters (Online) Journal Issue: 1 Vol. 818; ISSN 2041-8213

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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The Twist of the Draped Interstellar Magnetic Field Ahead of the Heliopause: A Magnetic Reconnection Driven Rotational Discontinuity Opher, M.; Drake, J. F.; Swisdak, M. arXiv https://doi.org/10.48550/arxiv.1702.06178	text	January 2017
The helium Warm Breeze in IBEX observations as a result of charge exchange collisions in the outer heliosheath Bzowski, Maciej; Kubiak, Marzena A.; Czechowski, Andrzej arXiv https://doi.org/10.48550/arxiv.1707.02193	text	January 2017
Galactic Cosmic-Ray Anisotropies: Voyager 1 in the Local Interstellar Medium Rankin, J. S.; Stone, E. C.; Cummings, A. C. arXiv https://doi.org/10.48550/arxiv.1905.11990	text	January 2019
Interstellar neutral helium in the heliosphere from IBEX observations. VI. The He$^+$ density and the ionization state in the Very Local Interstellar Matter Bzowski, M.; Czechowski, A.; Frisch, P. C. arXiv https://doi.org/10.48550/arxiv.1907.09645	text	January 2019
The interface between the outer heliosphere and the inner lism: Morphology of the local interstellar cloud, its hydrogen hole, stromgren shells, and $^{60}$Fe accretion Linsky, Jeffrey L.; Redfield, Seth; Tilipman, Dennis arXiv https://doi.org/10.48550/arxiv.1910.01243	text	January 2019
On the sensitivity of heliosphere models to the uncertainty of the low-energy charge exchange cross section Bzowski, M.; Heerikhuisen, J. arXiv https://doi.org/10.48550/arxiv.1911.09823	text	January 2019
Angular Scattering in Charge Exchange: Issues and Implications for Secondary Interstellar Hydrogen Swaczyna, P.; McComas, D. J.; Zirnstein, E. J. arXiv https://doi.org/10.48550/arxiv.1911.10230	text	January 2019
Heliosheath Processes and the Structure of the Heliopause: Modeling Energetic Particles, Cosmic Rays, and Magnetic Fields Czechowski, A.; Stone, E. C.; Pogorelov, N. V. Springer https://doi.org/10.7892/boris.105629	text	January 2017
Time Dependence of the IBEX Ribbon and the Globally Distributed Energetic Neutral Atom Flux Using the First 9 Years of Observations Schwadron, N. A.; Allegrini, F.; Bzowski, M. Institute of Physics Publishing IOP https://doi.org/10.7892/boris.122695	text	January 2018
Constraining the Evolution of the Proton Distribution Function in the Heliotail Zirnstein, E. J.; Kumar, R.; Heerikhuisen, J. Institute of Physics Publishing IOP https://doi.org/10.7892/boris.124959	text	January 2018
Interstellar Neutral Helium in the Heliosphere from IBEX Observations. VI. The He + Density and the Ionization State in the Very Local Interstellar Matter Bzowski, M.; Czechowski, A.; Frisch, P. C. Institute of Physics Publishing IOP https://doi.org/10.7892/boris.133459	text	January 2019

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ISM: atoms
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Local interstellar magnetic field determined from the interstellar boundary explorer ribbon

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