Rotational Variability and Detection of Superflares in a Young Brown Dwarf by TESS

Rajib Kumbhakar; Soumen Mondal; Samrat Ghosh; Diya Ram; Sudip Pramanik

doi:10.25518/0037-9565.11722

Bulletin de la Société Royale des Sciences de Liège

0037-9565 1783-5720

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Rajib Kumbhakar, Soumen Mondal, Samrat Ghosh, Diya Ram & Sudip Pramanik

Rotational Variability and Detection of Superflares in a Young Brown Dwarf by TESS

(Volume 93 - Année 2024 — No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation)

DOI: 10.25518/0037-9565.11722

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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

Om dit artikel te citeren:

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.