Infrared Fabry-Perot Imaging of M82 [Fe II] Emission. II. Tracing Extragalactic Supernova Remnants

Details Infrared Fabry-Perot Imaging of M82 [Fe II] Emission. II. Tracing Extragalactic Supernova Remnants Infrared Fabry-Perot Imaging of M82 [Fe II] Emission. II. Tracing Extragalactic Supernova Remnants

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...476..105g&link_type=abstract

Astrophysical Journal v.476, p.105

Astronomy and Astrophysics

Astronomy

26

Galaxies: Individual Messier Number: M82, Galaxies: Stellar Content, Galaxies: Structure, Infrared: Galaxies, Ism: Supernova Remnants, Techniques: Interferometric

Scientific paper

We report high spatial and spectral resolution [Fe II] 1.644 mu m Fabry-Perot imaging observations of M82. We present extinction-corrected [Fe II] images and discuss the nature of compact [Fe II] emission regions revealed by these new data. We conclude that these [Fe II] sources trace a population of supernova remnants in M82 that are substantially older than those revealed previously on 6 cm radiographs. In addition, we find that M82 contains a distributed [Fe II] emission component that is extended along the southern minor axis and that accounts for 90% of the galaxy's [Fe II] luminosity. We interpret this extended emission as tracing disk material entrained in a super wind that has broken out of the galactic disk to the south. We find that the [Fe II]/Br gamma line ratio throughout M82 correlates with the age of the starburst as reflected by the color of the photospheric emission from the galaxy's stars. This correlation suggests that the [Fe II] emission regions in M82 are colocated with a post--main-sequence stellar population. The engineering details of our Fabry-Perot imaging methodology are also discussed.

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