Protoplanetary disks around young stellar and substellar objects in the ? Orionis cluster

Title

Protoplanetary disks around young stellar and substellar objects in the ? Orionis cluster

Creator

Damian B.; Jose J.; Biller B.; Paul K.T.

Description

Understanding the evolution and dissipation of protoplanetary disks are crucial in star and planet formation studies. We report the protoplanetary disk population in the nearby young ? Orionis cluster (d? 408 pc; age ? 1.8 Myr) and analyse the disk properties, such as dependence on stellar mass and disk evolution. We utilize the comprehensive census of 170 spectroscopic members of the region refined using astrometry from Gaia DR3 for a wide mass range of ? 190.004 M? . Using the near-infrared (2MASS) and mid-infrared (WISE) photometries, we classify the sources based on the spectral index, into class I, class II, flat spectrum and class III young stellar objects. The frequency of sources hosting a disk with stellar mass <2 M? in this region is 41 7 %, which is consistent with the disk fraction estimated in previous studies. We see that there is no significant dependence of disk fraction on stellar mass among T Tauri stars (<2 M?), but we propose rapid disk depletion around higher mass stars (>2 M?). Furthermore, we found the lowest mass of a disk-bearing object to be ? 20 MJup and the pronounced disk-fraction among the brown dwarf population hints at the formation scenario that brown dwarfs form similar to low-mass stars. 2023, Indian Academy of Sciences.

Source

Journal of Astrophysics and Astronomy, Vol-44, No. 2

Date

2023-01-01

Publisher

Springer

Subject

protoplanetary disks; Star forming regions; young stellar objects

Coverage

Damian B., Department of Physics and Electronics, CHRIST (Deemed to be University), Hosur Road, Bengaluru, 560029, India; Jose J., Indian Institute of Science Education and Research (IISER) Tirupati, Rami Reddy Nagar, Karakambadi Road, Mangalam (P.O.), Tirupati, 517507, India; Biller B., SUPA, Institute for Astronomy, University of Edinburgh, Blackford Hill, Edinburgh, EH9 3HJ, United Kingdom, Centre for Exoplanet Science, University of Edinburgh, Edinburgh, United Kingdom; Paul K.T., Department of Physics and Electronics, CHRIST (Deemed to be University), Hosur Road, Bengaluru, 560029, India

Rights

All Open Access; Green Open Access

Relation

ISSN: 2506335

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.1007/s12036-023-09968-2

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