A peculiar young eruptive star in the dark cloud Lynds 1340

M. Kun, E. Szegedi-Elek, A. Moór, P. Brahm, J. A. Acosta-Pulido, D. Apai, J. Kelemen, A. Pl, M. Rcz, Zs Regly, R. Szakts, N. Szalai, A. Szing

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article numberL8
JournalAstrophysical Journal Letters
Volume733
Issue number1 PART 2
DOIs
Publication statusPublished - May 20 2011

Fingerprint

stars
energy
near infrared
spectral energy distribution
accretion
timescale
brightness
monitoring
C band
sun
emission spectra
luminosity
distribution
young
color
rate
chemical

Keywords

  • stars: formation
  • stars: individual ([KOS94] HA11)
  • stars: pre-main sequence
  • stars: variables: T Tauri, Herbig Ae/Be

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Kun, M., Szegedi-Elek, E., Moór, A., Brahm, P., Acosta-Pulido, J. A., Apai, D., ... Szing, A. (2011). A peculiar young eruptive star in the dark cloud Lynds 1340. Astrophysical Journal Letters, 733(1 PART 2), [L8]. https://doi.org/10.1088/2041-8205/733/1/L8

A peculiar young eruptive star in the dark cloud Lynds 1340. / Kun, M.; Szegedi-Elek, E.; Moór, A.; Brahm, P.; Acosta-Pulido, J. A.; Apai, D.; Kelemen, J.; Pl, A.; Rcz, M.; Regly, Zs; Szakts, R.; Szalai, N.; Szing, A.

In: Astrophysical Journal Letters, Vol. 733, No. 1 PART 2, L8, 20.05.2011.

Research output: Contribution to journalArticle

Kun, M, Szegedi-Elek, E, Moór, A, Brahm, P, Acosta-Pulido, JA, Apai, D, Kelemen, J, Pl, A, Rcz, M, Regly, Z, Szakts, R, Szalai, N & Szing, A 2011, 'A peculiar young eruptive star in the dark cloud Lynds 1340', Astrophysical Journal Letters, vol. 733, no. 1 PART 2, L8. https://doi.org/10.1088/2041-8205/733/1/L8
Kun, M. ; Szegedi-Elek, E. ; Moór, A. ; Brahm, P. ; Acosta-Pulido, J. A. ; Apai, D. ; Kelemen, J. ; Pl, A. ; Rcz, M. ; Regly, Zs ; Szakts, R. ; Szalai, N. ; Szing, A. / A peculiar young eruptive star in the dark cloud Lynds 1340. In: Astrophysical Journal Letters. 2011 ; Vol. 733, No. 1 PART 2.
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