The Trans-Heliospheric Survey
| Author(s) | Maruca, Bennett A. | |
| Author(s) | Qudsi, Ramiz A. | |
| Author(s) | Alterman, B. L. | |
| Author(s) | Walsh, Brian M. | |
| Author(s) | Korreck, Kelly E. | |
| Author(s) | Verscharen, Daniel | |
| Author(s) | Bandyopadhyay, Riddhi | |
| Author(s) | Chhiber, Rohit | |
| Author(s) | Chasapis, Alexandros | |
| Author(s) | Parashar, Tulasi N. | |
| Author(s) | Matthaeus, William H. | |
| Author(s) | Goldstein, Melvyn L. | |
| Date Accessioned | 2023-11-06T20:05:49Z | |
| Date Available | 2023-11-06T20:05:49Z | |
| Publication Date | 2023-07-24 | |
| Description | This article was originally published in Astronomy & Astrophysics. The version of record is available at: https://doi.org/10.1051/0004-6361/202345951. © The Authors 2023. | |
| Abstract | Context. Though the solar wind is characterized by spatial and temporal variability across a wide range of scales, long-term averages of in situ measurements have revealed clear radial trends: changes in average values of basic plasma parameters (e.g., density, temperature, and speed) and a magnetic field with a distance from the Sun. Aims. To establish our current understanding of the solar wind's average expansion through the heliosphere, data from multiple spacecraft needed to be combined and standardized into a single dataset. Methods. In this study, data from twelve heliospheric and planetary spacecraft - Parker Solar Probe (PSP), Helios 1 and 2, Mariner 2 and 10, Ulysses, Cassini, Pioneer 10 and 11, New Horizons, and Voyager 1 and 2 - were compiled into a dataset spanning over three orders of magnitude in heliocentric distance. To avoid introducing artifacts into this composite dataset, special attention was given to the solar cycle, spacecraft heliocentric elevation, and instrument calibration. Results. The radial trend in each parameter was found to be generally well described by a power-law fit, though up to two break points were identified in each fit. Conclusions. These radial trends are publicly released here to benefit research groups in the validation of global heliospheric simulations and in the development of new deep-space missions such as Interstellar Probe. | |
| Sponsor | B.A.M., R.A.Q., B.L.A., and B.M.W. acknowledge support from NASA Grant 80NSSC22K0645. B.L.A. is also supported by NASA Grants 80NSSC22K1011 and 80NSSC20K1844. B.A.M. and W.H.M. are supported by the Delaware Space Observation Center (DSpOC), which is funded by NASA Grant 80NSSC22K0884. W.H.M. is also partially supported by NASA under a Heliophysics GI Program Grant 80NSSC21K1765 and by the IMAP project through Princeton Subcontract SUB0000317 to the University of Delaware. D.V. is supported by STFC Ernest Rutherford Fellowship ST/P003826/1 and STFC Consolidated Grants ST/S000240/1 and ST/W001004/1. R.B. is supported by NASA Grants 80NSSC21K1767, 80NSSC21K1458 and 80NSSC21K0739. R.C. acknowledges support from NASA Grants 80NSSC18K1210 and 80NSSC18K1648. The authors extend their sincere thanks to the spacecraft/instrument teams whose data were used in this study and the teams behind the OMNI dataset, OMNIWeb, COHOWeb, and CDAWeb. B.A.M. thanks Parisa S. Mostafavi, Michael V. Paul, Justyna M. Sokol, and Lynn B. Wilson, III for useful discussions and the anonymous reviewer for several helpful suggestions. B.A.M. and D.V. benefited from discussion at the International Space Science Institute (ISSI) in Bern, through ISSI International Team project #563, which is led by Leon Ofman and Lan K. Jian. The preparation of this manuscript made use of the SAO/NASA Astrophysics Data System (ADS). | |
| Citation | Maruca, Bennett A., Ramiz A. Qudsi, B. L. Alterman, Brian M. Walsh, Kelly E. Korreck, Daniel Verscharen, Riddhi Bandyopadhyay, et al. “The Trans-Heliospheric Survey.” A&A 675 (2023). https://doi.org/10.1051/0004-6361/202345951. | |
| ISSN | 1432-0746 | |
| URL | https://udspace.udel.edu/handle/19716/33607 | |
| Language | en_US | |
| Publisher | Astronomy & Astrophysics | |
| dc.rights.uri | https://creativecommons.org/licenses/by/4.0 | |
| Keywords | Sun: heliosphere | |
| Keywords | solar wind | |
| Keywords | Sun: corona | |
| Title | The Trans-Heliospheric Survey | |
| Type | Article |
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