Multiple Sources of Solar High-energy Protons

被引：14

作者：

Kocharov, Leon ^{[1
,2
]}

Omodei, Nicola ^{[3
,4
]}

Mishev, Alexander ^{[1
,2
]}

Pesce-Rollins, Melissa ^{[5
]}

Longo, Francesco ^{[6
,7
]}

Yu, Sijie ^{[8
]}

Gary, Dale E. ^{[8
]}

Vainio, Rami ^{[9
]}

Usoskin, Ilya ^{[1
,2
]}

机构：

[1] Fac Sci, Space Phys & Astron Res Unit, POB 3000, FI-90014 Oulu, Finland

[2] Univ Oulu, Sodankyla Geophys Observ, FI-90014 Oulu, Finland

[3] Stanford Univ, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, Stanford, CA 94305 USA

[4] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA

[5] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy

[6] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy

[7] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy

[8] New Jersey Inst Technol, Ctr Solar Terr Res, Newark, NJ 07102 USA

[9] Univ Turku, Dept Phys & Astron, Space Res Lab, FI-20014 Turku, Finland

来源：

ASTROPHYSICAL JOURNAL | 2021年 / 915卷 / 01期

基金：

芬兰科学院;

关键词：

PARTICLE-ACCELERATION; INTERACTING PROTONS; MAGNETIC RECONNECTION; INTERPLANETARY PROTONS; RELATIVISTIC PROTONS; IMPULSIVE PHASE; FLARE; SHOCK; MICROWAVE; MODEL;

D O I：

10.3847/1538-4357/abff57

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

During the 24th solar cycle, the Fermi Large Area Telescope (LAT) has observed a total of 27 solar flares possessing delayed gamma-ray emission, including the exceptionally well-observed flare and coronal mass ejection (CME) on 2017 September 10. Based on the Fermi/LAT data, we plot, for the first time, maps of possible sources of the delayed >100 MeV gamma-ray emission of the 2017 September 10 event. The long-lasting gamma-ray emission is localized under the CME core. The gamma-ray spectrum exhibits intermittent changes in time, implying that more than one source of high-energy protons was formed during the flare-CME eruption. We find a good statistical correlation between the gamma-ray fluences of the Fermi/LAT-observed delayed events and the products of corresponding CME speed and the square root of the soft X-ray flare magnitude. Data support the idea that both flares and CMEs jointly contribute to the production of subrelativistic and relativistic protons near the Sun.

引用

页数：9

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