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Production of a short-lived filament by a surge

Zirin, H. (1976) Production of a short-lived filament by a surge. Solar Physics, 50 (2). pp. 399-404. ISSN 0038-0938. doi:10.1007/bf00155302.

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A large surge was observed on September 17, 1971, part of which, after travelling 200 000 km through the corona, returned to the surface to form a filament. The filament lasted about 30 min, then rose up and returned to the source of the surge. We interpret this as the filling of a semi-stable magnetic trap. The energetics of radio, X-ray, and surge expulsion are estimated. The radio spectrum and flux correspond to a thermal source of area 4 (arcmin)², T ∼ 190 000 K, N²_e V ∼ 7 × 10⁴⁸, which is optically deep at 8800 MHz. The soft X-ray source has T ∼ 12 × 10⁶ K, N²_e V ∼ 3 × 10⁴⁸; and if an equal mass is expelled in the surge, the kinetic energy of the surge is similar to the thermal energy of the X-ray source.

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Additional Information:© 1976 Kluwer Academic Publishers. Provided by the NASA Astrophysics Data System. Received 26 March; in final form 5 August, 1976. I would like to thank Drs John Castelli and Max Bleiweiss for providing the radio data. This work was supported by NASA grant NGR 05 002 034, NSF grant ATM74-13489 and Air Force Contract F19628-76-C-0055.
Funding AgencyGrant Number
NASANGR 05 002 034
Air Force Office of Scientific Research (AFOSR)F19628-76-C-0055
Subject Keywords:Kinetic Energy; Thermal Energy; Equal Mass; Radio Spectrum; Magnetic Trap
Issue or Number:2
Record Number:CaltechAUTHORS:20200616-073936474
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Official Citation:Zirin, H. Production of a short-lived filament by a surge. Sol Phys 50, 399–404 (1976).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103939
Deposited By: Tony Diaz
Deposited On:22 Jun 2020 17:23
Last Modified:16 Nov 2021 18:26

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