Resolving the buried starburst in Arp299

Details Resolving the buried starburst in Arp299 Resolving the buried starburst in Arp299

2002-01-17

arxiv.org/abs/astro-ph/0201278v1

Astronomy and Astrophysics

Astrophysics

9 pages, 2 figures. Accepted in The Astrophysical Journal on 16 Jan. 2002

Scientific paper

10.1086/339896

We present new 37.7 micron far-infrared imaging of the infrared luminous (L_IR ~ 5.16x10^{11} L_sun) interacting galaxy Arp299 (= IC694 + NGC3690). We show that the 38 micron flux, like the 60 and 100 micron emission, traces the luminosity of star forming galaxies, but at considerably higher spatial resolution. Our data establish that the major star formation activity of the galaxy originates from a point source in its eastern component, IC694, which is inconspicuous in the optical, becoming visible only at the near and mid-infrared. We find that IC694 is two times more luminous than NGC3690, contributing to more than 46% of the total energy output of the system at this wavelength. The spectral energy distribution of the different components of the system clearly shows that IC694, has 6 times the infrared luminosity of M82 and it is the primary source responsible for the bolometric luminosity of Arp299.

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