The 8-13 Micron Spectrum of Arp 299C

Details The 8-13 Micron Spectrum of Arp 299C The 8-13 Micron Spectrum of Arp 299C

1993-02-19

arxiv.org/abs/astro-ph/9302011v1

Astrophys.J. 407 (1993) L65

Astronomy and Astrophysics

Astrophysics

Eight pages with one figure included, Plain TeX with psfig macros included, IfA-93

Scientific paper

10.1086/186807

Arp 299C is a $5 \times 10^{10}$ \Lsun infrared source in the merging galaxy system Arp 299. It is the most luminous object known that is not obviously associated with a galaxy nucleus. Our data show that the 8--13 \mum spectrum of Arp 299C has a strong \NeII emission line and emission features like those of polycyclic aromatic hydrocarbon molecules. These emission features are characteristic of \HII regions associated with a burst of star formation. We did not detect any high-excitation ionic lines characteristic of an active galactic nucleus, nor a deep silicate absorption feature that might indicate a hidden compact nucleus. We deduce that Arp 299C is powered by an intense burst of star formation.

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