TY - JOUR
T1 - A peculiar young eruptive star in the dark cloud Lynds 1340
AU - Kun, M.
AU - Szegedi-Elek, E.
AU - Moór, A.
AU - Brahm, P.
AU - Acosta-Pulido, J. A.
AU - Apai, Daniel
AU - Kelemen, J.
AU - Pl, A.
AU - Rcz, M.
AU - Regly, Zs
AU - Szakts, R.
AU - Szalai, N.
AU - Szing, A.
PY - 2011/5/20
Y1 - 2011/5/20
N2 - 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≲ EW/ ≲ 900) Hα 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.
AB - 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≲ EW/ ≲ 900) Hα 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.
KW - stars: formation
KW - stars: individual ([KOS94] HA11)
KW - stars: pre-main sequence
KW - stars: variables: T Tauri, Herbig Ae/Be
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U2 - 10.1088/2041-8205/733/1/L8
DO - 10.1088/2041-8205/733/1/L8
M3 - Article
AN - SCOPUS:79959724754
VL - 733
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
SN - 2041-8205
IS - 1 PART 2
M1 - L8
ER -