دورية أكاديمية
Solar Terrestrial Relations Observatory (STEREO) Observations of Stream Interaction Regions in 2007 - 2016: Relationship with Heliospheric Current Sheets, Solar Cycle Variations, and Dual Observations.
| العنوان: | Solar Terrestrial Relations Observatory (STEREO) Observations of Stream Interaction Regions in 2007 - 2016: Relationship with Heliospheric Current Sheets, Solar Cycle Variations, and Dual Observations. |
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| المؤلفون: | Jian LK; Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA., Luhmann JG; Space Science Laboratory, University of California, Berkeley, CA 94720, USA., Russell CT; Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095, USA.; Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA 90095, USA., Galvin AB; Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824, USA.; Department of Physics, University of New Hampshire, Durham, NH 03824, USA. |
| المصدر: | Solar physics [Sol Phys] 2019 Mar; Vol. 294 (3). Date of Electronic Publication: 2019 Mar 06. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Springer Netherlands Country of Publication: Netherlands NLM ID: 101659554 Publication Model: Print-Electronic Cited Medium: Print ISSN: 0038-0938 (Print) Linking ISSN: 00380938 NLM ISO Abbreviation: Sol Phys Subsets: PubMed not MEDLINE |
| أسماء مطبوعة: | Publication: <2004-> : Dordrecht : Springer Netherlands Original Publication: Dordrecht, Holland, Boston, Kluwer, etc. |
| مستخلص: | We have conducted a survey of 575 slow-to-fast stream interaction regions (SIRs) using Solar Terrestrial Relations Observatory (STEREO) A and B data, analyzing their properties while extending a Level-3 data product through 2016. Among 518 pristine SIRs, 54% are associated with heliospheric current sheet (HCS) crossings, and 34% are without any HCS crossing. The other 12% of the SIRs often occur in association with magnetic sectors shorter than three days. The SIRs with HCS crossings have slightly slower speeds but higher maximum number densities, magnetic-field strengths, dynamic pressures, and total pressures than the SIRs without an HCS. The iron charge state is higher throughout the SIRs with an HCS than the SIRs without an HCS, by about 1/3 charge unit. In contrast with the comparable phases of Solar Cycle 23, slightly more SIRs and higher recurrence rates are observed in the years 2009 - 2016 of Cycle 24, with a lower HCS association rate, possibly attributed to persistent equatorial coronal holes and more pseudo-streamers in this recent cycle. The solar-wind speed, peak magnetic field, and peak pressures of SIRs are all lower in this cycle, but the weakening is less than for the comparable background solar-wind parameters. Before STEREO-B lost contact in October 2014, 151 SIR pairs were observed by the twin spacecraft. Of the dual observations, the maximum speed is the best correlated of the plasma parameters. We have obtained a sample of plasma-parameter differences analogous to those that would be observed by a mission at Lagrange points 4 or 5. By studying several cases with large discrepancies between the dual observations, we investigate the effects of HCS relative location, tilt of stream interface, and small transients on the SIR properties. To resolve the physical reasons for the variability of SIR structures, mesoscale multi-point observations and time-dependent solar-wind modeling are ultimately required. Competing Interests: Disclosure of Potential Conflicts of Interest The authors declare that they have no conflicts of interest. |
| References: | Rev Sci Instrum. 1978 Sep;49(9):1260. (PMID: 18699298) Sol Phys. 2019 Mar;294(3):. (PMID: 31057186) Space Weather. 2018 Oct 17;16(11):1644-1667. (PMID: 32021590) Science. 1996 May 31;272(5266):1284-6. (PMID: 8662455) |
| فهرسة مساهمة: | Keywords: Corotating interaction region; STEREO mission; Shock; Solar Cycle; Solar wind; Stream interaction |
| تواريخ الأحداث: | Date Created: 20190507 Latest Revision: 20240716 |
| رمز التحديث: | 20240716 |
| مُعرف محوري في PubMed: | PMC6491050 |
| DOI: | 10.1007/s11207-019-1416-8 |
| PMID: | 31057186 |
| قاعدة البيانات: | MEDLINE |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 0038-0938 |
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| DOI: | 10.1007/s11207-019-1416-8 |