Rotational Variability and Detection of Superflares in a Young Brown Dwarf by TESS
Rajib Kumbhakar,
S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700106, India. Corresponding author: rajskbuph0@gmail.com
Soumen Mondal,
S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700106, India. Corresponding author: soumen.mondal@bose.res.in
Samrat Ghosh,
S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700106, India
Diya Ram,
S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700106, India
Sudip Pramanik,
S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700106, India
Abstract
We present a comprehensive analysis of a Transiting Exoplanet Survey Satellite (TESS) high-quality light curve for a young brown dwarf, MHO 4 having spectral type M7.0, in the Taurus star-forming region. We investigate the rotation periods and characterize the brown dwarf’s dynamic atmosphere and surface features. Our light curve analysis of MHO 4 reveals a rotation period of approximately 2.224 days. Remarkably, MHO 4 exhibits two significant flaring events. Furthermore, we estimate the bolometric flare energies to be within the energy range of 1034 to 1035 erg, classifying them as superflares.
Keywords : brown dwarfs, TESS, photometric variability, periodic variables, starspots
Pour citer cet article
Rajib Kumbhakar, Soumen Mondal, Samrat Ghosh, Diya Ram & Sudip Pramanik, «Rotational Variability and Detection of Superflares in a Young Brown Dwarf by TESS», 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, 370-380 URL : http://popups.ulg.be/0037-9565/index.php?id=11722.