Morphological differences between optical and infrared images of the spiral galaxy NGC309

Details Morphological differences between optical and infrared images of the spiral galaxy NGC309 Morphological differences between optical and infrared images of the spiral galaxy NGC309

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.353...48b&link_type=abstract

Nature (ISSN 0028-0836), vol. 353, Sept. 5, 1991, p. 48-50.

Astronomy and Astrophysics

Astronomy

70

Astronomical Photography, Galactic Structure, Infrared Astronomy, Infrared Imagery, Spiral Galaxies, Visual Observation, Brightness Distribution, Luminosity

Scientific paper

Images at 2.1 micron of NGC309, one of the largest 'grand design' spiral galaxies, are presented. Optically NGC309 presents a classic multiarm morphology, but at 2.1 micron a two-arm spiral and the appearance of a prominent central bar are seen, so that NGC309 resembles the SBa galaxy NGC1358. These findings underscore existing indication that the disk structure of spiral galaxies may be unrelated to the Hubble type assigned from the transient population I morphology.

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