Year: 2024
Type: article
Abstract: We investigate the long-term persistence of the time series of energetic neutral atom (ENA) fluxes recorded by the Interstellar Boundary Explorer (IBEX). ENAs provide global information about the outer heliosphere and its interactions with the very local interstellar medium. To avoid the IBEX Ribbon, here, we focus our analysis solely on the polar regions N60°–N90° and S60°–S90°. Each year, IBEX takes two measurements of every pixel in the sky. We make use of the whole set of 14 yr of IBEX data and adhere to the correct time order for the construction of the flux time series. We examine in detail both the trend and the fluctuations of these time series. Using modern methods of time series analysis and persistence characterization, we show that the time series (i) trend is influenced by the solar cycle, (ii) persistence can be established independently of the presence of this trend, and (iii) statistical properties of the fluctuations differs between north and south, pointing to the existence of anisotropy and thus a north–south asymmetry.
Source: The Astrophysical Journal
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
Awards: G6539802142, THE PLANNED PERIOD OF PERFORMANCE IS NOVEMBER 1 2017 THROUGH OCTOBER 31 2019. THE FOLLOWING ACTIVITIES WILL BE PERFORMED DURING THE EXTENDED MISSION BY PRINCETON. A. PROVIDE PI LEADERSHIP OF THE IBEX SCIENCE EFFORT THROUGHOUT THE EXTENDED MISSION B. MANAGE THE PRINCETON SCIENCE EFFORT THROUGHOUT THE EXTENDED MISSION C. PREPARE AND SUBMIT QUARTERLY TECHNICAL PROGRESS REPORTS D. SUPPORT TEAM TELECONS 1 TO 2 TIMES PER MONTH E. ATTEND SCIENCE TEAM MEETINGS AND SCIENTIFIC CONFERENCES AS CALLED BY THE PI F. DEVELOP ALGORITHMS AND SOFTWARE AS REQUEST BY THE PI IN SUPPORT OF IBEX DATA ANALYSIS OR THEORY EFFORTS G. ANALYZE AND PUBLISH IBEX INVESTIGATION SCIENCE DATA H. RECEIVE AND ANALYZE PAYLOAD SCIENCE DATA; WORK WITH THE IBEX TEAM TO DEVELOP MODELS ALGORITHMS ETC. TO ANALYZE THE SCIENCE DATA; PUBLISH IBEX SCIENCE RESULTS; SUPPORT THE ARCHIVAL OF SCIENCE DATA
OpenAlex ID: W4404339310