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The Interstellar Boundary Explorer (IBEX) spacecraft is providing the first all-sky maps of the energetic neutral atoms (ENAs) produced by charge-exchange between interstellar neutral \HI\ atoms and heliospheric solar wind and pickup ions…

The Interstellar Boundary Explorer (IBEX) mission is exploring the frontiers of the heliosphere where energetic neutral atoms (ENAs) are formed from charge exchange between interstellar neutral hydrogen atoms and solar wind ions and pickup…

Astrophysics of Galaxies · Physics 2015-03-17 Priscilla C. Frisch , David J. McComas

The Energetic Neutral Atom (ENA) full-sky maps obtained with the Interstellar Boundary Explorer (IBEX) show an unexpected bright narrow band of increased intensity. This so-called ENA ribbon results from charge exchange of interstellar…

Solar and Stellar Astrophysics · Physics 2015-10-07 Adama Sylla , Horst Fichtner

The Interstellar Boundary Explorer (IBEX) images the heliosphere by observing energetic neutral atoms (ENAs). The IBEX-Hi instrument onboard IBEX provides full-sky maps of ENA fluxes produced in the heliosphere and very local interstellar…

Space Physics · Physics 2023-06-07 P. Swaczyna , M. A. Dayeh , E. J. Zirnstein

Full sky maps of energetic neutral atoms (ENA) obtained with the Interstellar Boundary Explorer revealed a bright, arc-like Ribbon. We compare possible, though as yet undetected, He ENA emission in two models of the Ribbon origin. The…

Solar and Stellar Astrophysics · Physics 2014-02-05 P. Swaczyna , S. Grzedzielski , M. Bzowski

The brightest and most surprising feature in the first all-sky maps of Energetic Neutral Atoms (ENA) emissions (0.2-6 keV) produced by the Interstellar Boundary Explorer (IBEX) is an almost circular ribbon of a ~140{\deg} opening angle,…

Astrophysics of Galaxies · Physics 2015-05-18 S. Grzedzielski , M. Bzowski , A. Czechowski , H. O. Funsten , D. J. McComas , N. A. Schwadron

The Interstellar Boundary Explorer (IBEX) has been measuring fluxes of the Energetic Neutral Atoms (ENAs) using the IBEX-Hi (0.3 -- 6 keV) instrument since 2008. We have developed a numerical time-depended code to calculate globally…

Space Physics · Physics 2020-10-01 I. I. Baliukin , V. V. Izmodenov , D. B. Alexashov

The Interstellar Boundary Explorer (IBEX) has now operated in space for 7 years and returned nearly continuous observations that have led to scientific discoveries and reshaped our entire understanding of the outer heliosphere and its…

One of the most remarkable discoveries by the IBEX is the ribbon - a narrow band of enhanced ENA fluxes observed in the sky. The prevailing explanation attributes the IBEX ribbon to the secondary ENA mechanism. In this process, primary H…

Space Physics · Physics 2025-05-28 Igor Baliukin , Vladislav Izmodenov

Maps of Energetic Neutral Atom (ENA) fluxes obtained from Interstellar Boundary Explorer (IBEX) observations revealed a bright structure extending over the sky, subsequently dubbed the IBEX ribbon. The ribbon had not been expected from the…

Solar and Stellar Astrophysics · Physics 2016-06-03 P. Swaczyna , M. Bzowski , E. R. Christian , H. O. Funsten , D. J. McComas , N. A. Schwadron

We present new kinetic-gasdynamic model of the solar wind interaction with the local interstellar medium. The model incorporates several processes suggested by McComas et al. (2009) for the origin of the heliospheric ENA ribbon -- the most…

Solar and Stellar Astrophysics · Physics 2015-05-18 S. V. Chalov , D. B. Alexashov , D. McComas , V. V. Izmodenov , Yu. G. Malama , N. Schwadron

Observations of energetic neutral atoms (ENAs) allow for remote studies of the plasma condition in the heliosphere and the neighboring local interstellar medium. The first IBEX results revealed an arc-like enhancement of the ENA intensity…

Solar and Stellar Astrophysics · Physics 2018-01-30 Paweł Swaczyna , Maciej Bzowski , Justyna M. Sokół

A Ribbon of enhanced energetic neutral atom (ENA) emissions was discovered by the Interstellar Boundary Explorer (IBEX) in 2009, redefining our understanding of the heliosphere boundaries and the physical processes occurring at the…

Solar and Stellar Astrophysics · Physics 2024-11-26 Maher A. Dayeh , Eric J. Zirnstein , Pawel Swaczyna , David J. McComas

Since 2008, the Interstellar Boundary Explorer (IBEX) satellite has been gathering data on heliospheric energetic neutral atoms (ENAs) while being exposed to various sources of background noise, such as cosmic rays and solar energetic…

Instrumentation and Methods for Astrophysics · Physics 2023-11-30 Kelly R. Moran , Dave Osthus , Brian P. Weaver , Lauren J. Beesley , Madeline A. Stricklin , Paul H. Janzen , Daniel B. Reisenfeld

The Interstellar Boundary Explorer (IBEX) satellite has been in orbit since 2008 and detects energy-resolved energetic neutral atoms (ENAs) originating from the heliosphere. Different regions of the heliosphere generate ENAs at different…

Instrumentation and Methods for Astrophysics · Physics 2022-10-24 Dave Osthus , Brian P. Weaver , Lauren J. Beesley , Kelly R. Moran , Madeline A. Ausdemore , Eric J. Zirnstein , Paul H. Janzen , Daniel B. Reisenfeld

The Interstellar Boundary Explorer (IBEX) satellite collects data on energetic neutral atoms (ENAs) that provide insight into the heliosphere, the region surrounding our solar system and separating it from interstellar space. IBEX collects…

We present a first comparison of Energetic Neutral Atom (ENA) heliosheath measurements, remotely sensed by the Interstellar Boundary Explorer (IBEX) mission and the Ion and Neutral Camera (INCA) on the Cassini mission, with modeled ENA…

Several concepts for heliospheric missions operating at heliocentric distances far beyond Earth orbit are currently investigated by the scientific community. The mission concept of the Interstellar Probe (McNutt et al. 2018), e.g., aims at…

Solar and Stellar Astrophysics · Physics 2020-01-08 Andre Galli , Peter Wurz , Horst Fichtner , Yoshifumi Futaana , Stas Barabash

Energetic neutral atoms (ENA) are an important tool for investigating the structure of the heliosphere. Recently, it was observed that fluxes of ENAs (with energy $\le$ 55 keV) coming from the upwind and downwind regions of the heliosphere…

Understanding the outer heliospheric interface is a major challenge, especially in the light of recent observations by the IBEX and Voyager missions. We present further details on a new required theoretical correction that has been…

Solar and Stellar Astrophysics · Physics 2014-08-27 M. Siewert , H. -J. Fahr
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