Title: Time Dependence of the IBEX Ribbon and the Globally Distributed Energetic Neutral Atom Flux Using the First 9 Years of Observations

Journal Article · · The Astrophysical Journal. Supplement Series (Online)
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [4];  [5]; ORCiD logo [2];  [1];  [6]; ORCiD logo [7];  [2]; ORCiD logo [8];  [9];  [3]; ORCiD logo [10]; ORCiD logo [1]; ORCiD logo [7]; ORCiD logo [3]; ORCiD logo [10]; ORCiD logo [10]; ORCiD logo [8] more »; ORCiD logo [10] « less
  1. Univ. of New Hampshire, Durham, NH (United States)
  2. Southwest Research Inst. (SwRI), San Antonio, TX (United States); Univ. of Texas, San Antonio, TX (United States)
  3. Polish Academy of Sciences (PAS), Krakow (Poland)
  4. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  5. Southwest Research Inst. (SwRI), San Antonio, TX (United States)
  6. Univ. of Chicago, IL (United States)
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  8. Univ. of Bern (Switzerland)
  9. Univ. of Montana, Missoula, MT (United States)
  10. Princeton Univ., NJ (United States)
+ Show Author Affiliations

Observations from the Interstellar Boundary Explorer (IBEX) of energetic neutral atoms (ENAs) reveal two populations, those emitted from a narrow (~20°–40°) ribbon that is centered on the local interstellar magnetic field, and a globally distributed flux (GDF) that is controlled by processes in the heliosheath. This is a third study utilizing a previously developed technique to separate ENA emissions in the ribbon from the GDF. In the first ribbon separation study, we analyzed the first year of IBEX data at the energies of 0.7 keV and above; the second study analyzed data down to 0.2 keV using the first five years of IBEX data. Here, we utilize the separation analysis from 0.7 keV and above to study time evolution in 3 year intervals over the first nine years of IBEX data. This study is the first to reveal the global time evolution of the GDF distinct from that of the IBEX ribbon. We show that the time evolution of the GDF within 40° of the upwind pressure maximum is driven by changes in the solar wind ram pressure through compression and rarefaction in the heliosheath. In contrast, the GDF is relatively stable in the region centered on the heliotail downwind with respect to the interstellar flow. The evolution of the IBEX ribbon is observed to have a time lag with respect to the upwind GDF evolution, likely due to the secondary (neutral) solar wind source. The time lag observed in the ribbon evolution is consistent with the generation of ions retained for several years beyond the heliopause. These observations lend further support to secondary solar wind models of the IBEX ribbon, but also require that there is a significant several year time lag for reneutralization of ions that form the IBEX ribbon. We use this study of the 9 year separation of the IBEX ribbon from the globally distributed flux to prepare for a formal IBEX data release of ribbon and globally distributed flux maps to the heliophysics community.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
NASA; USDOE
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1558966
Report Number(s):
LA-UR-18-29466
Journal Information:
The Astrophysical Journal. Supplement Series (Online), Journal Name: The Astrophysical Journal. Supplement Series (Online) Journal Issue: 1 Vol. 239; ISSN 1538-4365
Publisher:
American Astronomical Society/IOPCopyright Statement
Country of Publication:
United States
Language:
English

References (78)

IBEX's Enigmatic Ribbon in the sky and its many possible sources: THE IBEX RIBBON AND ITS SOURCES journal February 2014
Proton velocity ring-driven instabilities and their dependence on the ring speed: Linear theory: PROTON RING-DRIVEN INSTABILITIES journal August 2017
Reconstruction of Helio-Latitudinal Structure of the Solar Wind Proton Speed and Density journal September 2015
Reconstruction of the Sunspot Group Number: The Backbone Method journal February 2016
The IBEX-Lo Sensor journal May 2009
IBEX—Interstellar Boundary Explorer journal April 2009
The Interstellar Boundary Explorer High Energy (IBEX-Hi) Neutral Atom Imager journal April 2009
CRaTER: The Cosmic Ray Telescope for the Effects of Radiation Experiment on the Lunar Reconnaissance Orbiter Mission journal January 2010
Kinetic parameters of interstellar neutral helium: updated results from the ULYSSES/GAS-instrument journal January 2004
Solar wind spatial scales in and comparisons of hourly Wind and ACE plasma and magnetic field data journal January 2005
Charge transfer cross sections for energetic neutral atom data analysis journal January 2005
Pickup proton instabilities and scattering in the distant solar wind and the outer heliosheath: Hybrid simulations: PICKUP PROTON INSTABILITIES AND SCATTERING journal October 2012
An asymmetric solar wind termination shock journal July 2008
Cool heliosheath plasma and deceleration of the upstream solar wind at the termination shock journal July 2008
Magnetic fields at the solar wind termination shock journal July 2008
The bubble-like shape of the heliosphere observed by Voyager and Cassini journal April 2017
The inner heliosheath source for keV-ENAs observed with IBEX: Shock-processed downstream pick-up ions journal February 2012
Dependence of Heliospheric Lyα Absorption on the Interstellar Magnetic Field journal April 2007
STABILITY OF A PICKUP ION RING-BEAM POPULATION IN THE OUTER HELIOSHEATH: IMPLICATIONS FOR THE IBEX RIBBON journal July 2010
PITCH ANGLE SCATTERING IN THE OUTER HELIOSHEATH AND FORMATION OF THE INTERSTELLAR BOUNDARY EXPLORER RIBBON journal December 2010
SEPARATION OF THE INTERSTELLAR BOUNDARY EXPLORER RIBBON FROM GLOBALLY DISTRIBUTED ENERGETIC NEUTRAL ATOM FLUX journal March 2011
INTERSTELLAR BOUNDARY EXPLORER MEASUREMENTS AND MAGNETIC FIELD IN THE VICINITY OF THE HELIOPAUSE journal November 2011
EFFECTS OF FAST AND SLOW SOLAR WIND ON THE ENERGETIC NEUTRAL ATOM (ENA) SPECTRA MEASURED BY THE INTERSTELLAR BOUNDARY EXPLORER ( IBEX ) AT THE HELIOSPHERIC POLES journal March 2012
The Effects of Local Interstellar Magnetic Field on Energetic Neutral atom sky maps journal August 2012
The Interstellar Magnetic Field Close to the sun. ii. journal November 2012
SPATIAL RETENTION OF IONS PRODUCING THE IBEX RIBBON journal January 2013
ANALYTIC MODEL OF THE IBEX RIBBON WITH NEUTRAL SOLAR WIND BASED ION PICKUP BEYOND THE HELIOPAUSE journal March 2013
THE 2-3 kHz HELIOSPHERIC RADIATION, THE IBEX RIBBON, AND THE THREE-DIMENSIONAL SHAPE OF THE HELIOPAUSE journal June 2013
CIRCULARITY OF THE INTERSTELLAR BOUNDARY EXPLORER RIBBON OF ENHANCED ENERGETIC NEUTRAL ATOM (ENA) FLUX journal September 2013
A THREE-COORDINATE SYSTEM (ECLIPTIC, GALACTIC, ISMF) SPECTRAL ANALYSIS OF HELIOSPHERIC ENA EMISSIONS USING CASSINI /INCA MEASUREMENTS journal November 2013
SPATIAL CONFINEMENT OF THE IBEX RIBBON: A DOMINANT TURBULENCE MECHANISM journal May 2014
On the Stability of Pick-Up ion ring Distributions in the Outer Heliosheath journal September 2014
WARMER LOCAL INTERSTELLAR MEDIUM: A POSSIBLE RESOLUTION OF THE ULYSSES - IBEX ENIGMA journal February 2015
REVISITING THE ISN FLOW PARAMETERS, USING A VARIABLE IBEX POINTING STRATEGY journal April 2015
CHARTING THE INTERSTELLAR MAGNETIC FIELD CAUSING THE INTERSTELLAR BOUNDARY EXPLORER ( IBEX ) RIBBON OF ENERGETIC NEUTRAL ATOMS journal November 2015
THE FIRST THREE YEARS OF IBEX OBSERVATIONS AND OUR EVOLVING HELIOSPHERE journal October 2012
SEPARATION OF THE RIBBON FROM GLOBALLY DISTRIBUTED ENERGETIC NEUTRAL ATOM FLUX USING THE FIRST FIVE YEARS OF IBEX OBSERVATIONS journal October 2014
INTERSTELLAR FLOW AND TEMPERATURE DETERMINATION WITH IBEX : ROBUSTNESS AND SENSITIVITY TO SYSTEMATIC EFFECTS journal October 2015
DETERMINATION OF INTERSTELLAR He PARAMETERS USING FIVE YEARS OF DATA FROM THE IBEX : BEYOND CLOSED FORM APPROXIMATIONS journal October 2015
INTERSTELLAR NEUTRAL HELIUM IN THE HELIOSPHERE FROM IBEX OBSERVATIONS. III. MACH NUMBER OF THE FLOW, VELOCITY VECTOR, AND TEMPERATURE FROM THE FIRST SIX YEARS OF MEASUREMENTS journal October 2015
PICK-UP IONS IN THE OUTER HELIOSHEATH: A POSSIBLE MECHANISM FOR THE INTERSTELLAR BOUNDARY EXplorer RIBBON journal December 2009
SCATTER-FREE PICKUP IONS BEYOND THE HELIOPAUSE AS A MODEL FOR THE INTERSTELLAR BOUNDARY EXPLORER RIBBON journal May 2010
IBEX RIBBON: WHAT COULD IT TELL ABOUT THE LOCAL INTERSTELLAR MAGNETIC FIELD? journal January 2011
WHY ARE THE MAGNETIC FIELD DIRECTIONS MEASURED BY VOYAGER 1 ON BOTH SIDES OF THE HELIOPAUSE SO SIMILAR? journal June 2014
PLASMA FLOWS AT VOYAGER 2 AWAY FROM THE MEASURED SUPRATHERMAL PRESSURES journal October 2014
STRUCTURE OF THE INTERSTELLAR BOUNDARY EXPLORER RIBBON FROM SECONDARY CHARGE-EXCHANGE AT THE SOLAR–INTERSTELLAR INTERFACE journal April 2015
A NEW MODEL FOR THE HELIOSPHERE’S “ IBEX RIBBON” journal October 2015
Triangulation of the Interstellar Magnetic Field journal October 2015
Deflection of the Interstellar Neutral Hydrogen Flow Across the Heliospheric Interface journal March 2005
Global Observations of the Interstellar Interaction from the Interstellar Boundary Explorer (IBEX) journal October 2009
Structures and Spectral Variations of the Outer Heliosphere in IBEX Energetic Neutral Atom Maps journal October 2009
Width and Variation of the ENA Flux Ribbon Observed by the Interstellar Boundary Explorer journal October 2009
Comparison of Interstellar Boundary Explorer Observations with 3D Global Heliospheric Models journal October 2009
Imaging the Interaction of the Heliosphere with the Interstellar Medium from Saturn with Cassini journal October 2009
Global Anisotropies in TeV Cosmic Rays Related to the Sun's Local Galactic Environment from IBEX journal February 2014
Major solar eruptions and high-energy particle events during solar cycle 24 journal September 2014
DISTANCE TO THE IBEX RIBBON SOURCE INFERRED FROM PARALLAX journal May 2016
THE IBEX RIBBON AND THE PICKUP ION RING STABILITY IN THE OUTER HELIOSHEATH. I. THEORY AND HYBRID SIMULATIONS journal July 2016
THE IBEX RIBBON AND THE PICKUP ION RING STABILITY IN THE OUTER HELIOSHEATH. II. MONTE-CARLO AND PARTICLE-IN-CELL MODEL RESULTS journal July 2016
THE ENERGY-DEPENDENT POSITION OF THE IBEX RIBBON DUE TO THE SOLAR WIND STRUCTURE journal August 2016
DETERMINATION OF INTERSTELLAR O PARAMETERS USING THE FIRST TWO YEARS OF DATA FROM THE INTERSTELLAR BOUNDARY EXPLORER journal September 2016
INTERSTELLAR NEUTRAL HELIUM IN THE HELIOSPHERE FROM IBEX OBSERVATIONS. IV. FLOW VECTOR, MACH NUMBER, AND ABUNDANCE OF THE WARM BREEZE journal April 2016
Effects of Solar Activity on the Local Interstellar Magnetic Field Observed by Voyager 1 and IBEX journal November 2017
The Downwind Hemisphere of the Heliosphere: Eight Years of IBEX -Lo Observations journal December 2017
The Role of Pickup Ion Dynamics Outside of the Heliopause in the Limit of Weak Pitch Angle Scattering: Implications for the Source of the IBEX Ribbon journal March 2018
The Heliosphere Is Not Round journal July 2018
LOCAL INTERSTELLAR MAGNETIC FIELD DETERMINED FROM THE INTERSTELLAR BOUNDARY EXPLORER RIBBON journal February 2016
Heliosphere Responds to a Large Solar Wind Intensification: Decisive Observations from IBEX journal March 2018
Spatial Confinement of the IBEX Ribbon: A Dominant Turbulence Mechanism text January 2014
Reconstruction of the Sunspot Group Number: the Backbone Method text January 2015
Reconstruction of Helio-latitudinal Structure of the Solar Wind Proton Speed and Density text January 2015
Interstellar neutral helium in the heliosphere from IBEX observations. IV. Flow vector, Mach number, and abundance of the Warm Breeze text January 2016
Distance to the IBEX Ribbon Source Inferred from Parallax text January 2016
The energy-dependent position of the IBEX ribbon due to the solar wind structure text January 2016
A Consistent Scenario for the IBEX Ribbon, Anisotropies in TeV Cosmic Rays, and the Local Interstellar Medium journal January 2015
Separation of the Ribbon from globally distributed energetic neutral Atom Flux using the first five Years of Ibex Observations text January 2014
Revisiting the ISN Flow Parameters, using a variable IBEX pointing strategy text January 2015
Interstellar neutral helium in the heliosphere from IBEX observations. IV. Flow vector, Mach number, and abundance of the Warm Breeze text January 2016

Cited By (12)

Energetic Neutral Atoms from the Heliosheath as an Additional Population of Neutral Hydrogen in the Inner Heliosphere journal January 2019
Expanding Global Features in the Outer Heliosphere journal February 2019
Temporal Evolution of the Latitude and Energy Dependence of the Energetic Neutral Atom Spectral Indices Measured by the Interstellar Boundary Explorer ( IBEX ) Over the First Nine Years journal April 2019
Strong Scattering of ∼keV Pickup Ions in the Local Interstellar Magnetic Field Draped around Our Heliosphere: Implications for the IBEX Ribbon's Source and IMAP journal May 2019
Variability in the Position of the IBEX Ribbon over Nine Years: More Observational Evidence for a Secondary ENA Source journal July 2019
Parallax of the IBEX Ribbon Indicates a Spatially Retained Source journal July 2019
Heliosheath Properties Measured from a Voyager 2 to Voyager 1 Transient journal September 2019
Turbulence in the Local Interstellar Medium and the IBEX Ribbon journal January 2020
The Interstellar Ribbon: A Unifying Explanation journal December 2019
Energetic neutral atoms from the heliosheath as an additional population of neutral hydrogen in the inner heliosphere text January 2018
Heliosheath Properties Measured from a Voyager 2 to Voyager 1 Transient text January 2019
Energetic Neutral Atoms from the Heliosheath as an Additional Population of Neutral Hydrogen in the Inner Heliosphere text January 2019

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