A PECULIAR YOUNG ERUPTIVE STAR IN THE DARK CLOUD LYNDS 1340

被引：19
|
作者：
Kun, M. [1 ]
Szegedi-Elek, E. [1 ]
Moor, A. [1 ]
Abraham, P. [1 ]
Acosta-Pulido, J. A. [2 ]
Apai, D. [3 ,4 ]
Kelemen, J. [1 ]
Pal, A. [1 ]
Racz, M. [1 ]
Regaly, Zs. [1 ]
Szakats, R. [5 ]
Szalai, N. [1 ]
Szing, A. [1 ]
机构：
[1] Konkoly Observ Budapest, H-1121 Budapest, Hungary
[2] Inst Astrofis Canarias, E-38200 Tenerife, Canary Islands, Spain
[3] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA
[4] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA
[5] Baja Astron Observ Bacs Kiskun Cty, H-6500 Baja, Hungary
来源：
ASTROPHYSICAL JOURNAL LETTERS | 2011年 / 733卷 / 01期
关键词：
stars: formation; stars: individual ([KOS94] HA11); stars: pre-main sequence; stars: variables: T Tauri; Herbig Ae/Be; MAIN-SEQUENCE STARS; H-ALPHA-EMISSION; T TAURI STARS; 2003-2006; OUTBURST; MCNEILS NEBULA; V1647; ORIONIS; VARIABILITY; ORI; MULTIWAVELENGTH; ACCRETION;
D O I：
10.1088/2041-8205/733/1/L8
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We conducted a long-term optical photometric and spectroscopic monitoring of the strongly variable, accreting young sun-like star [KOS94] HA11, associated with the dark cloud Lynds 1340 that exhibited large amplitude (5-6 mag in the I-C band) brightness variations on 2-3 years timescales, flat spectral energy distribution (SED), and extremely strong (300 less than or similar to EW/angstrom less than or similar to 900) H alpha emission. In this Letter we describe the basic properties of the star, derived from our observations between 1999 and 2011, and put into context the observed phenomena. The observed variations in the emission spectra, near-infrared colors, and SED suggest that [KOS94] HA11 (spectral type: K7-M0) is an eruptive young star, possibly similar in nature to V1647 Ori: its large-scale photometric variations are governed by variable accretion rate, associated with variations in the inner disk structure. The star recently has undergone strong and rapid brightness variations, thus its further observations may offer a rare opportunity for studying structural and chemical rearrangements of the inner disk, induced by variable central luminosity.
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页数：6
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