Contreras Peña, C., Lee, J. -E., Herczeg, G., Johnstone, D., Ábrahám, P., Antoniucci, S., Audard, M., Ashraf, M., Baek, G., Garatti, A. Caratti o, and others. (2025) The Outbursting YSOs Catalogue (OYCAT). Journal of The Korean Astronomical Society, 58 (2). pp. 209-230. ISSN 1225-4614. E-ISSN 2288-890X. (doi:10.5303/JKAS.2025.58.2.209) (KAR id:111449)
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| Official URL: https://doi.org/10.5303/JKAS.2025.58.2.209 |
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Abstract
Young stellar objects (YSOs) can display unpredictable and high-amplitude rises in brightness that can last from a few months to possibly over 100 years. These types of outbursts are explained by large changes in the mass accretion rate from the disk onto the central star. This type of variability has given support to a model of star formation (episodic accretion) where stars would spend most of their lifetimes accreting at low rates, and gain most of their mass through these short-lived accretion outbursts. The universality of episodic accretion, as well as its potential impact on stellar and planetary formation are still under debate. Improvement on the statistics of the members of the eruptive class is needed to better understand the episodic accretion phenomenon and its universality across different mass regimes and environments. In this paper we collect published information on the spectroscopic and photometric characteristics of 174 YSOs confirmed to belong to the eruptive variable class. We classify these objects into five different sub-classes (we find 49 FUor, 20 FUor-like, 16 EX Lupi-type, 81 Peculiar/V1647 Ori-like/MNors and 8 Periodic YSOs). The classification follows what has been done previously in the literature, and it is not an attempt to redefine these classes. In addition, we present a list of 18 embedded, and 6 massive YSOs, as additional categories of eruptive variable YSOs. Due to the complexity and/or faintness of these systems, it is hard to place them into the original classification scheme of this class of variable YSOs. Finally, we present a separate list of 355 candidate eruptive variable YSOs, which either lack spectroscopic information or the available spectroscopic data is not sufficient for an unambiguous classification. The online catalogue of confirmed and candidate eruptive YSOs will be maintained and updated in the future to serve as an important reference for the star formation community.
| Item Type: | Article |
|---|---|
| DOI/Identification number: | 10.5303/JKAS.2025.58.2.209 |
| Uncontrolled keywords: | Solar and Stellar Astrophysics, Astrophysics of Galaxies |
| Subjects: | Q Science > QB Astronomy > QB460 Astrophysics |
| Institutional Unit: | Schools > School of Engineering, Mathematics and Physics > Physics and Astronomy |
| Former Institutional Unit: |
There are no former institutional units.
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| Funders: | University of Kent (https://ror.org/00xkeyj56) |
| Depositing User: | Dirk Froebrich |
| Date Deposited: | 01 Oct 2025 10:41 UTC |
| Last Modified: | 03 Oct 2025 15:01 UTC |
| Resource URI: | https://kar.kent.ac.uk/id/eprint/111449 (The current URI for this page, for reference purposes) |
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