Direct photography of the GUM Nebula

Details Direct photography of the GUM Nebula Direct photography of the GUM Nebula

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...208..109b&link_type=abstract

Astrophysical Journal, vol. 208, Aug. 15, 1976, pt. 1, p. 109-112.

Astronomy and Astrophysics

Astrophysics

11

Astronomical Photography, Gum Nebula, Interstellar Gas, Astronomical Maps, H Alpha Line, Photographic Plates, Supernova Remnants, Wide Angle Lenses

Scientific paper

The paper discusses a series of wide-angle photographs taken of the Gum Nebula in the traditional region including H-alpha with the aid of a 40-cm and an 80-cm lens in both the red and the green. The photographs support the large dimensions (75 deg in galactic longitude by 40 deg in galactic latitude) of the Gum Nebula suggested earlier, and the appearance is consistent with an origin due to photons from a supernova outburst. The relatively high-density gas has cooled and is visible on the red plates. The low-density gas has remained at a high temperature and may be visible as diffuse emission on the green plates.

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