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Subhajeet Karmakar, Jeewan Chandra Pandey, Nikita Rawat, Gurpreet Singh & Riddhi Shedge

AstroSat Investigation of X-ray Flares on Two Active K-M Systems: CC Eri and AB Dor

(Volume 93 - Année 2024 — No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation)
DOI: 10.25518/0037-9565.11701
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Abstract

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 1031−33 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 ∼1054 for CC Eri and ∼1055 cm−3 for AB Dor. Global metallic abundances were also found to increase during flares.

Keywords : stars: activity, stars: coronae, stars: flare, stars: AB Dor, stars: CC Eri, stars: low-mass, stars: magnetic field.

Pour citer cet article

Subhajeet Karmakar, Jeewan Chandra Pandey, Nikita Rawat, Gurpreet Singh & Riddhi Shedge, «AstroSat Investigation of X-ray Flares on Two Active K-M Systems: CC Eri and AB Dor», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 93 - Année 2024, No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation, 333-340 URL : http://popups.ulg.be/0037-9565/index.php?id=11701.

A propos de : Subhajeet Karmakar

Monterey Institute for Research in Astronomy (MIRA), 200 Eighth Street, Marina, California 93933, USA. Corresponding author: subhajeet09@gmail.com, sk@mira.org

A propos de : Jeewan Chandra Pandey

Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263002, India

A propos de : Nikita Rawat

Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263002, India

A propos de : Gurpreet Singh

Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263002, India

A propos de : Riddhi Shedge

Monterey Institute for Research in Astronomy (MIRA), 200 Eighth Street, Marina, California 93933, USA and Monta Vista High School, 21840 McClellan Rd, Cupertino, CA 95014, USA