New Candidate Eruptive Young Stars in Lynds 1340

Kun, Mária and Apai, D. and O'Linger-Luscusk, J. and Moór, Attila and Stecklum, B. and Szegedi-Elek, Elza and Wolf-Chase, G. (2014) New Candidate Eruptive Young Stars in Lynds 1340. ASTROPHYSICAL JOURNAL LETTERS, 795 (2). ISSN 2041-8205

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Abstract

We report on the discovery of three candidate eruptive young stars, found during our comprehensive multi-wavelength study of the young stellar popula- tion of the dark cloud L1340. These stars are as follows. (1) IRAS 02224+7227 (2MASS 02270555+7241167, HH 487 S) exhibited FUor-like spectrum in our low- resolution optical spectra. The available photometric data restrict its luminosity to 23 L⊙ < Lbol < 59 L⊙. (2) 2MASS 02263797+7304575, identified as a clas- sical T Tauri star during our Hα survey, exhibited an EXor type brightening in 2005 November, at the time of the SDSS 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 DSS1 and DSS2 surveys, leading to the appearance of a faint optical nebula. Our [S II] and Hα images, as well as the Spitzer IRAC 4.5 μm images revealed Herbig–Haro objects associated with this star. Our results suggest that amplitudes and time scales of outbursts do not necessarily correlate with the evolutionary stage of the stars.

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