Comparing Spiral Galaxy Morphology at Ultraviolet and Optical Wavelengths

Details Comparing Spiral Galaxy Morphology at Ultraviolet and Optical Wavelengths Comparing Spiral Galaxy Morphology at Ultraviolet and Optical Wavelengths

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...193.0814k&link_type=abstract

American Astronomical Society, 193rd AAS Meeting, #08.14; Bulletin of the American Astronomical Society, Vol. 30, p.1259

Mathematics

Logic

Scientific paper

We present far-ultraviolet (FUV) and optical (UBVI ) images and surface brightness profiles of several nearby spiral galaxies and discuss wavelength-dependent changes in their apparent morphology both qualitatively and quantitatively. This subset of the UIT Astro-2 sample contains Hubble types Sa-Im and was selected to emphasize late-type systems in which star formation produces prominent morphological features in the FUV ( ~ 1600 Angstroms). Spiral arms, rings, and circumnuclear star formation regions are clearly evident in comparisons of the FUV and optical images and dominate the azimuthally averaged FUV surface brightness and FUV-optical color profiles. The strong deviations from a smooth disk or disk+bulge profile that are seen in the FUV highlight the difficulty of determining traditional disk and bulge structural parameters from rest-frame UV galaxy images. We also calculate concentration and asymmetry indices for the sample galaxies in the FUV and UBVI bandpasses to investigate trends with wavelength. Measurements of these indices at ultraviolet as well as optical wavelengths will help quantify the ``morphological k-correction'' out to high redshift without the need to simulate band-shifting. Based on characteristics observed in the FUV galaxy images, we discuss some requirements for a classification scheme that would be applicable to rest-frame UV galaxy images, mergers and protogalaxies, and other situations in which the Hubble system does not adequately describe the observed morphology.

Affiliated with

Also associated with

No associations

Rating

Comparing Spiral Galaxy Morphology at Ultraviolet and Optical Wavelengths 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 Comparing Spiral Galaxy Morphology at Ultraviolet and Optical Wavelengths, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparing Spiral Galaxy Morphology at Ultraviolet and Optical Wavelengths will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-992611