SIMBAD references

1998AJ....116.2154K - Astron. J., 116, 2154-2165 (1998/November-0)

A photometric method for quantifying asymmetries in disk galaxies.

KORNREICH D.A., HAYNES M.P. and LOVELACE R.V.E.

Abstract (from CDS):

A photometric method for quantifying deviations from axisymmetry in optical images of disk galaxies is applied to a sample of 32 face-on and nearly face-on spirals. The method involves comparing the relative fluxes contained within trapezoidal sectors arranged symmetrically about the galaxy center of light, excluding the bulge and/or barred regions. Such a method has several advantages over others, especially when quantifying asymmetry in flocculent galaxies. Specifically, the averaging of large regions improves the signal-to-noise in the measurements; the method is not strongly affected by the presence of spiral arms; and it identifies the kinds of asymmetry that are likely to be dynamically important. Application of this ``method of sectors'' to R-band images of 32 disk galaxies indicates that about 30% of spirals show deviations from axisymmetry at the 5 σ level.

Abstract Copyright:

Journal keyword(s): Galaxies: Photometry - Galaxies: Structure - Techniques: Photometric

Status at CDS:  

Simbad objects: 33

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:1998AJ....116.2154K and select 'bookmark this link' or equivalent in the popup menu


2020.06.07-02:35:08

© Université de Strasbourg/CNRS

    • Contact