|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ИНХС РАН |
||
LO Peg: Surface Differential Rotation, Flares, and Spot-topographic evolutionстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 26 августа 2016 г.
- Авторы: Authors: Karmakar Subhajeet, Pandey J.C., Savanov I.S., Tas G., Pandey S.B., Misra K., Joshi S., Dmitrienko E.S., Sakamoto T., Gehrels N., Okajima T.
- Журнал: Monthly Notices of the Royal Astronomical Society
- Том: 459
- Номер: 3
- Год издания: 2016
- Издательство: Oxford Journals, Oxford University Press
- Местоположение издательства: Oxford, UK, England
- Первая страница: 3112
- Последняя страница: 3129
- DOI: 10.1093/mnras/stw855
- Аннотация: Abstract Using the wealth of ˜24 yr multi-band data, we present an in-depth study of the starspot cycles, Surface Differential Rotations (SDR), optical flares, evolution of starspot distributions, and coronal activities on the surface of young, single, main-sequence, Ultra Fast Rotator (UFR) LO Peg. From the long-term V-band photometry, we derive rotational period of LO Peg to be 0.4231 ± 0.0001 d. Using the seasonal variations on the rotational period, the SDR pattern is investigated, and shows a solar-like pattern of SDR. A cyclic pattern with period of ˜2.7 yr appears to be present in rotational period variation. During the observations, 20 optical flares are detected with a flare frequency of ˜1 flare per two days and with flare energy of ˜1031-34 erg. The surface coverage of cool spots is found to be in the range of ˜9-26 per cent. It appears that the high and low latitude spots are interchanging their positions. Quasi-simultaneous observations in X-ray, UV, and optical photometric bands show a signature of an excess of X-ray and UV activities in spotted regions.
- Добавил в систему: Дмитриенко Елена Сергеевна