New Eruptive YSOs from SPICY and WISE

Carlos Contreras Peña, M. Ashraf, J. E. Lee, G. Herczeg, P. W. Lucas, Z. Guo, D. Johnstone, H. G. Lee, J. Jose

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This work presents four high-amplitude variable YSOs (≃3 mag at near-or mid-IR wavelengths) arising from the SPICY catalog. Three outbursts show a duration that is longer than 1 year, and are still ongoing. And additional YSO brightened over the last two epochs of NEOWISE observations and the duration of the outburst is thus unclear. Analysis of the spectra of the four sources confirms them as new members of the eruptive variable class. We find two YSOs that can be firmly classified as bona fide FUors and one object that falls in the V1647 Ori-like class. Given the uncertainty in the duration of its outburst, an additional YSO can only be classified as a candidate FUor. Continued monitoring and follow-up of these particular sources is important to better understand the accretion process of YSOs.

Original languageEnglish
Pages (from-to)253-262
Number of pages10
JournalJournal of the Korean Astronomical Society (JKAS)
Issue number2
Publication statusPublished - 28 Dec 2023


  • astro-ph.SR
  • stars: formation
  • stars: pre-main sequence
  • stars: protostars
  • stars: variables: T Tauri, Herbig Ae/Be


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