Coronal Modulation in the Ultra-fast Rotator LO Peg
Gurpreet Singh,
Aryabhatta Research Institute of observational sciencES, Manora Peak, Nainital, 263001, India and Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, 273009, India. Corresponding author: gurpreet@aries.res.in
Jeewan Chandra Pandey,
Aryabhatta Research Institute of observational sciencES, Manora Peak, Nainital, 263001, India
Umesh Yadava,
Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, 273009, India
Abstract
We present coronal imaging of the ultra-fast rotator, LO Peg, using the X-ray observations from XMM-Newton. The X-ray light curves show one strong flare at the end of observation, as reported in an earlier study. On removal of flaring events, the quiescent state light curve shows rotational modulations, which are modelled using a maximum likelihood model. The results obtained from modelling show that the corona of LO Peg is not uniform. Active regions are concentrated around two longitudes, where one active region appears to be compact. The large coronal area that covers almost 60 degrees along longitude from the poles to the equator does not consist of active regions.
Keywords : Stellar activity, Stellar Coronae, X-ray star, X-ray astronomy, Stellar imaging
Pour citer cet article
Gurpreet Singh, Jeewan Chandra Pandey & Umesh Yadava, «Coronal Modulation in the Ultra-fast Rotator LO Peg», 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, 146-154 URL : https://popups.uliege.be/0037-9565/index.php?id=11630.