Far-infrared structure in the nuclear region of M51

Details Far-infrared structure in the nuclear region of M51 Far-infrared structure in the nuclear region of M51

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...302..280l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 302, March 1, 1986, p. 280-286.

Astronomy and Astrophysics

Astrophysics

31

Far Infrared Radiation, Galactic Nuclei, Infrared Stars, Spiral Galaxies, Maximum Entropy Method, Stellar Evolution

Scientific paper

Far-infrared (100-micron) scans across the nucleus of M51 are presented. These scans show that much of the far-infrared luminosity of this galaxy comes from a small, sharply bounded region within a 30 arcsec radius (700 pc) of the nucleus. This radius corresponds to the innermost spiral structure, as well as that estimated from dynamical models for the radius of the inner Lindblad resonance. The results of a nonlinear image restoration analysis of the data are presented. This analysis, carried out with two different algorithms, yields information on the spatial structure of star formation near the nucleus that exceeds the diffraction limit of the telescope at this wavelength. This 'superresolution' treatment shows that star formation is enhanced at the outer edge of this region compared to the nucleus, which appears to be relatively devoid of young stars. This ring of active star formation may be produced in the same way as that seen in our own Galaxy at a galactocentric radius of 4-5 kpc and may indicate that the region near the nucleus has been swept clean of material by violent processes.

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