Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-06-09
Astronomy and Astrophysics
Astrophysics
8 pages, 3 figures, to be published in A&A
Scientific paper
10.1051/0004-6361:20010806
We present our recent spectrophotometric results of the infrared luminous Seyfert 2 galaxy NGC 7679. We find compelling evidence of the presence of a recent nuclear starburst, revealed by the observations of a) the spectral features of high order Balmer absorption lines, b) the weak equivalent widths for CaIIK $\lambda$3933, CN $\lambda$4200, G-band $\lambda$4300 and MgIb $\lambda$5173, and c) the suggested UV stellar wind resonance lines (N V $\lambda$1240, Si IV $\lambda$1400 and C IV $\lambda$1550) in the IUE spectrum. Using the simple stellar population synthesis model, we find that in the nuclear 2" $\times$ 2" region, the contributions from the old, intermediate and young components are 21.7%, 42.9% and 35.4%, respectively. These nuclear starburst activities might be triggered by the close encounter with NGC 7682, as suggested by recent numerical simulations.
Benitez Erika
de Diego Jose A.
Dultzin-Hacyan Deborah
Gu Qiang
Huang Jianwei
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