NEW CANDIDATE ERUPTIVE YOUNG STARS IN LYNDS 1340

被引:5
|
作者
Kun, M. [1 ]
Apai, D. [2 ,3 ]
O'Linger-Luscusk, J. [4 ]
Moor, A. [1 ]
Stecklum, B. [5 ]
Szegedi-Elek, E. [1 ]
Wolf-Chase, G. [6 ,7 ]
机构
[1] Konkoly Observ Budapest, H-1121 Budapest, Hungary
[2] Univ Arizona, Dept Astron, Tucson, AZ 85721 USA
[3] Univ Arizona, Dept Planetary Sci, Tucson, AZ 85721 USA
[4] CALTECH, Pasadena, CA 91125 USA
[5] Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany
[6] Adler Planetarium, Dept Astron, Chicago, IL 60605 USA
[7] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA
关键词
stars:; individual; (IRAS; 02224+7227; 2MASS; 02263797+7304575; 02325605+7246055); stars: pre-main sequence; stars: protostars; stars: variables: T Tauri; Herbig Ae/Be; SPITZER; HISTORY; SPECTROSCOPY; PHOTOMETER; PROTOSTARS; ACCRETION; EVOLUTION; OBJECTS; NEBULA; ORION;
D O I
10.1088/2041-8205/795/2/L26
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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.
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页数:6
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