Variations of the energy spectra of solar X-ray flares: interconnection with the photospheric, chromospheric, and magnetic activity of the Sun (1972−2001)
The problem of flare energy distribution of the Sun is strongly related to the power-law energy spectra of flares on the UV Ceti-type stars. In a preliminary study (1972–1993), the X-ray flare integral energy spectrum (IES) was represented by a unique power law of N ~ E−b with index b = 0.76. Later...
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| Опубліковано в: : | Кинематика и физика небесных тел |
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| Дата: | 2005 |
| Автор: | |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Головна астрономічна обсерваторія НАН України
2005
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/79614 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Variations of the energy spectra of solar X-ray flares: interconnection with the photospheric, chromospheric, and magnetic activity of the Sun (1972−2001) / V. Kasinskii // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 105-109. — Бібліогр.: 5 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862544887592779776 |
|---|---|
| author | Kasinskii, V. |
| author_facet | Kasinskii, V. |
| citation_txt | Variations of the energy spectra of solar X-ray flares: interconnection with the photospheric, chromospheric, and magnetic activity of the Sun (1972−2001) / V. Kasinskii // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 105-109. — Бібліогр.: 5 назв. — англ. |
| collection | DSpace DC |
| container_title | Кинематика и физика небесных тел |
| description | The problem of flare energy distribution of the Sun is strongly related to the power-law energy spectra of flares on the UV Ceti-type stars. In a preliminary study (1972–1993), the X-ray flare integral energy spectrum (IES) was represented by a unique power law of N ~ E−b with index b = 0.76. Later it was shown that the exponent index b varies with the cycle phase, that is with the Wolf number. The purpose of this paper is to investigate the temporal variations in the power-law spectrum of soft X-ray flares over the three solar cycles (1972–2001). A more extensive statistic (56 000 flares) allows us to revise earlier results and to derive new ones. Not only b-index undergoes variations associated with a 11-year cycle but the limiting energy of flares (log Em) as well. The three-cycle-averaged b is 0.666, with variations in the range 0.50 < b < 0.80. The results may be useful for study of flare activity on red dwarf stars.
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| first_indexed | 2025-11-25T03:53:45Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-79614 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0233-7665 |
| language | English |
| last_indexed | 2025-11-25T03:53:45Z |
| publishDate | 2005 |
| publisher | Головна астрономічна обсерваторія НАН України |
| record_format | dspace |
| spelling | Kasinskii, V. 2015-04-03T15:26:59Z 2015-04-03T15:26:59Z 2005 Variations of the energy spectra of solar X-ray flares: interconnection with the photospheric, chromospheric, and magnetic activity of the Sun (1972−2001) / V. Kasinskii // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 105-109. — Бібліогр.: 5 назв. — англ. 0233-7665 https://nasplib.isofts.kiev.ua/handle/123456789/79614 The problem of flare energy distribution of the Sun is strongly related to the power-law energy spectra of flares on the UV Ceti-type stars. In a preliminary study (1972–1993), the X-ray flare integral energy spectrum (IES) was represented by a unique power law of N ~ E−b with index b = 0.76. Later it was shown that the exponent index b varies with the cycle phase, that is with the Wolf number. The purpose of this paper is to investigate the temporal variations in the power-law spectrum of soft X-ray flares over the three solar cycles (1972–2001). A more extensive statistic (56 000 flares) allows us to revise earlier results and to derive new ones. Not only b-index undergoes variations associated with a 11-year cycle but the limiting energy of flares (log Em) as well. The three-cycle-averaged b is 0.666, with variations in the range 0.50 < b < 0.80. The results may be useful for study of flare activity on red dwarf stars. The author is grateful to Prof. Ya. Yatskiv for official invitation to the MAO-2004 Conference, Kyiv, Ukraine, July 15–17, 2004. en Головна астрономічна обсерваторія НАН України Кинематика и физика небесных тел MS2: Physics of Solar Atmosphere Variations of the energy spectra of solar X-ray flares: interconnection with the photospheric, chromospheric, and magnetic activity of the Sun (1972−2001) Article published earlier |
| spellingShingle | Variations of the energy spectra of solar X-ray flares: interconnection with the photospheric, chromospheric, and magnetic activity of the Sun (1972−2001) Kasinskii, V. MS2: Physics of Solar Atmosphere |
| title | Variations of the energy spectra of solar X-ray flares: interconnection with the photospheric, chromospheric, and magnetic activity of the Sun (1972−2001) |
| title_full | Variations of the energy spectra of solar X-ray flares: interconnection with the photospheric, chromospheric, and magnetic activity of the Sun (1972−2001) |
| title_fullStr | Variations of the energy spectra of solar X-ray flares: interconnection with the photospheric, chromospheric, and magnetic activity of the Sun (1972−2001) |
| title_full_unstemmed | Variations of the energy spectra of solar X-ray flares: interconnection with the photospheric, chromospheric, and magnetic activity of the Sun (1972−2001) |
| title_short | Variations of the energy spectra of solar X-ray flares: interconnection with the photospheric, chromospheric, and magnetic activity of the Sun (1972−2001) |
| title_sort | variations of the energy spectra of solar x-ray flares: interconnection with the photospheric, chromospheric, and magnetic activity of the sun (1972−2001) |
| topic | MS2: Physics of Solar Atmosphere |
| topic_facet | MS2: Physics of Solar Atmosphere |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/79614 |
| work_keys_str_mv | AT kasinskiiv variationsoftheenergyspectraofsolarxrayflaresinterconnectionwiththephotosphericchromosphericandmagneticactivityofthesun19722001 |