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Somnath Dutta, Soumen Mondal, Santosh Joshi & Ramkrishna Das

Rotation rates of pre-main sequence stars: role of circumstellar disk

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Mots-clés : jeunes étoiles, observations optiques, variabilité photométrique, variables périodiques, matériau circumstellaire

Abstract

Photometric variability with new high-cadence, long-duration data has drawn a huge interest to explore the time domain behaviour of young stellar objects since the last few decades. Here we provide an overview of optical photometric observations of the young clusters, identification of variable nature from their light curves, characterization of their circumstellar disk. Based on our studies, we find that 50-65% of young stars are variable in our studied regions. Most of the periodic young stars have periods less than 10 days. Disk-bearing stars have relatively larger amplitudes than the older population, which indicate that the young stellar variability could be due to the effect of the hotspot, asymmetric disk obscuration, accretion outbursts or any other structural modification in the inner disk regions.

Keywords : young stars, optical observations, photometric variability, periodic variables, circumstellar material

To cite this article

Somnath Dutta, Soumen Mondal, Santosh Joshi & Ramkrishna Das, «Rotation rates of pre-main sequence stars: role of circumstellar disk», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 88 - Année 2019, Actes de colloques, 2nd Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - October 2018 - Brussels, Belgium, 103-109 URL : https://popups.uliege.be/0037-9565/index.php?id=8723.

About: Somnath Dutta

Indian Institute of Science Education and Research Tirupati, Tirupati -517 507, India, and S. N. Bose National Centre for Basic Sciences, Kolkata-700 106, India,  duttasomnath9@gmail.com

About: Soumen Mondal

S. N. Bose National Centre for Basic Sciences, Kolkata-700 106, India,  soumen.mondal@bose.res.in

About: Santosh Joshi

Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital-263 002, India

About: Ramkrishna Das

S. N. Bose National Centre for Basic Sciences, Kolkata-700 106, India