AstroSat investigation of X-ray flares on two active K-M systems: CC Eri and AB Dor
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866917557300101120 |
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| author | Karmakar, Subhajeet Pandey, Jeewan C. Rawat, Nikita Singh, Gurpreet Shedge, Riddhi |
| author_facet | Karmakar, Subhajeet Pandey, Jeewan C. Rawat, Nikita Singh, Gurpreet Shedge, Riddhi |
| contents | We present an X-ray and UV investigation of five X-ray flares detected on two active systems, CC Eri and AB Dor, using the AstroSat observatory. The peak X-ray luminosities of the flares in the 0.3$-$7.0 keV band are found to be within 10$^{31-33}$ erg s$^{-1}$. Preliminary spectral analysis indicates the presence of three and four-temperature corona for CC Eri and AB Dor, respectively, where the highest temperature is found to vary with flare. The flare temperatures peaked at 51$-$59 MK for CC Eri and 29$-$44 MK for AB Dor. The peak emission measures of the flaring loops are estimated to be $\sim$10$^{54}$ for CC Eri and $\sim$10$^{55}$ cm$^{-3}$ for AB Dor. Global metallic abundances were also found to increase during flares. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_00117 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | AstroSat investigation of X-ray flares on two active K-M systems: CC Eri and AB Dor Karmakar, Subhajeet Pandey, Jeewan C. Rawat, Nikita Singh, Gurpreet Shedge, Riddhi Solar and Stellar Astrophysics High Energy Astrophysical Phenomena We present an X-ray and UV investigation of five X-ray flares detected on two active systems, CC Eri and AB Dor, using the AstroSat observatory. The peak X-ray luminosities of the flares in the 0.3$-$7.0 keV band are found to be within 10$^{31-33}$ erg s$^{-1}$. Preliminary spectral analysis indicates the presence of three and four-temperature corona for CC Eri and AB Dor, respectively, where the highest temperature is found to vary with flare. The flare temperatures peaked at 51$-$59 MK for CC Eri and 29$-$44 MK for AB Dor. The peak emission measures of the flaring loops are estimated to be $\sim$10$^{54}$ for CC Eri and $\sim$10$^{55}$ cm$^{-3}$ for AB Dor. Global metallic abundances were also found to increase during flares. |
| title | AstroSat investigation of X-ray flares on two active K-M systems: CC Eri and AB Dor |
| topic | Solar and Stellar Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2401.00117 |