NEW CANDIDATE ERUPTIVE YOUNG STARS IN LYNDS 1340

作者：Kun M^*; Apai D; O'Linger Luscusk J; Moor A; Stecklum B; Szegedi Elek E; Wolf Chase G

来源：Astrophysical Journal Letters, 2014, 795(2): L26.

DOI：10.1088/2041-8205/795/2/L26

• stars: individual (IRAS 02224+7227, 2MASS 02263797+7304575, 2MASS 02325605+7246055)
• stars: pre-main sequence
• stars: protostars
• stars: variables: T Tauri, Herbig Ae/Be

We report on the discovery of three candidate eruptive young stars, found during our comprehensive multi-wavelength study of the young stellar population of the dark cloud L1340. These stars are as follows. (1) IRAS 02224+7227 (2MASS 02270555+7241167, HH 487S) exhibited FUor-like spectrum in our low-resolution optical spectra. The available photometric data restrict its luminosity to 23 L-circle dot < L-bol < 59 L-circle dot. (2) 2MASS 02263797+7304575, identified as a classical T Tauri star during our H alpha survey, exhibited an EXor-type brightening in 2005 November at the time of the Sloan Digital Sky Survey observations of the region. (3) 2MASS 02325605+7246055, a low-mass embedded young star, associated with a fan-shaped infrared nebula, underwent an outburst between the DSS 1 and DSS 2 surveys, leading to the appearance of a faint optical nebula. Our [S II] and Ha images, as well as the Spitzer Infrared Array Camera 4.5 mu m images, revealed Herbig-Haro objects associated with this star. Our results suggest that amplitudes and timescales of outbursts do not necessarily correlate with the evolutionary stage of the stars.

• 出版日期2014-11-10