A PECULIAR YOUNG ERUPTIVE STAR IN THE DARK CLOUD LYNDS 1340
- Konkoly Observatory, H-1121 Budapest, Konkoly Thege ut 15-17 (Hungary)
- Instituto de Astrofisica de Canarias, E-38200, La Laguna, Tenerife, Canary Islands (Spain)
- Steward Observatory and Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721 (United States)
- Baja Astronomical Observatory of Bacs-Kiskun County, P.O. Box 766, 6500 Baja (Hungary)
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{sub C} band) brightness variations on 2-3 years timescales, flat spectral energy distribution (SED), and extremely strong (300{approx}< EW/A {approx}< 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.
- OSTI ID:
- 21562673
- Journal Information:
- Astrophysical Journal Letters, Vol. 733, Issue 1; Other Information: DOI: 10.1088/2041-8205/733/1/L8; ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
Similar Records
HIGHLY VARIABLE EXTINCTION AND ACCRETION IN THE JET-DRIVING CLASS I-TYPE YOUNG STAR PTF 10nvg (V2492 Cyg, IRAS 20496+4354)
THE YOUNG STELLAR POPULATION OF LYNDS 1340. AN INFRARED VIEW