Coronal Modulation in the Ultra-fast Rotator LO Peg
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.
- Publication:
-
Bulletin de la Societe Royale des Sciences de Liege
- Pub Date:
- June 2024
- DOI:
- 10.25518/0037-9565.11630
- arXiv:
- arXiv:2405.04857
- Bibcode:
- 2024BSRSL..93..146S
- Keywords:
-
- Stellar activity;
- Stellar coronae;
- X-rays: stars;
- X-ray astronomy;
- Stellar imaging;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- Accepted for publication in Bulletin de la Soci\'et\'e Royale des Sciences de Li\`ege (BSRSL)