Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007chjaa...7..764l&link_type=abstract
Chinese Journal of Astronomy and Astrophysics, Volume 7, Issue 6, pp. 764-770 (2007).
Astronomy and Astrophysics
Astrophysics
1
Scientific paper
We present a study of the dwarf elliptical galaxy NGC 855 using the narrow-band Hα and Spitzer data. Both the Hα and Spitzer IRAC images confirm star-forming activity in the center of NGC 855. We obtained a star formation rate (SFR) of 0.022 and 0.025Modot yr-1, respectively, from the Spitzer IRAC 8.0 μm and MIPS 24 μm emission data. The HI observation suggests that the star-forming activity might be triggered by a minor merger. We also find that there is a distinct IR emission region in 5.8 and 8.0 μm bands, located at about 10'' away from the nucleus of NGC 855. Given the strong 8.0 μm but faint Hα emission, we expect that it is a heavily obscured star-forming region, which needs to be confirmed by further optical spectroscopic observations.
Gu Qiu-Sheng
Huang Jia-Sheng
Li Sheng-Peng
Luo Xin-lian
Zhao Ying-He
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