NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-26 T09:25:41 PDT
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For refcode 1993ApJS...88..415R:
Retrieve 25 NED objects in this reference.
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NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
1993ApJS...88..415R AN H{alpha} ATLAS OF NEARBY SOUTHERN SPIRAL GALAXIES STUART D. RYDER AND MICHAEL A. DOPITA Mount Stromlo and Siding Spring Observatories, Australian National University, Weston Creek P.O., ACT 2611, Australia Received 1992 December 18; accepted 1993 March 17 ABSTRACT We present here an atlas of CCD images of 25 nearby southern spiral galaxies taken through narrow-band (15 A) H{alpha} filters, and accompanying red continuum (6676 A) images. Most of these galaxies have never previously been imaged in H{alpha} and will complement the earlier photographic atlas of Hodge & Kennicutt. We comment on the individual distributions of the H II regions in relation to the morphology and characteristics of each galaxy. Nearly half of the galaxies surveyed exhibit rather asymmetrical distributions of star formation activity, even though the stellar distributions may be quite regular. Among galaxies possessing both a strong stellar bar and an encircling inner ring, there appears to be a decrease in the number of H II regions tracing out the bar as the number of H II regions in the ring itself increases, and vice versa. The images should prove useful mainly as finding charts for in-depth studies of the H II region populations, as well as for the purposes of determining abundance gradients and the kinematics of these galaxies. Subject headings: atlases - galaxies: spiral - galaxies: structure - H II regions
Retrieve 25 NED objects in this reference.
Please click here for ADS abstract

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