Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...255l..99s&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 255, Apr. 15, 1982, p. L99-L102.
Astronomy and Astrophysics
Astronomy
18
Abundance, Cosmic Dust, Galactic Structure, Spiral Galaxies, Ultraviolet Astronomy, Brightness, Galactic Radiation, H Ii Regions, Metals, Nebulae, Rocket-Borne Instruments
Scientific paper
Since extreme Population I dominates three rocketborne telescope UV images of the Sc I galaxy NGC 5457, the delineation of the spiral structure is sharper than that of ground photographs. The UV pictures, in which the H II regions appear as reflection nebulae and illumine the nearby dust, reveal faint arms which, although correlated with the 21 cm H I radiograph, are only marginally detectable on deep visual photographs. The surface brightness of the arms is explainable in terms of UV light scattering off dust from hot stars and bright H II regions, in which case the dust would have extinction properties and a dust-to-gas ratio similar to that in the solar neighborhood and would in addition suggest that the NGC 5457 outer arm metal content is similar to that of the galaxy.
Bohlin Ralph Charles
Hill Jesse K.
Jura Michael A.
Stecher Theodore P.
No associations
LandOfFree
Ultraviolet images of M101 - Observations of dust and inferences on the metallicity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Ultraviolet images of M101 - Observations of dust and inferences on the metallicity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultraviolet images of M101 - Observations of dust and inferences on the metallicity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-840857