CDROM/AJ/V109/P1608 Virgo Cluster Spirals (Rauscher 1995) ================================================================================ Near-Infrared Surface Photometry and Morphology in Virgo Cluster Spiral Galaxy Nuclear Regions Bernard J. Rauscher <1995, AJ, 109, 1608> =1995AJ....109.1608R ================================================================================ Abstract: This paper presents very high spatial resolution (seeing 0.75 arcsec FWHM) K band surface photometry of 15 Virgo cluster spiral galaxy nuclear regions (radii <1 kpc). It presents B and I band CCD images of 13 of these galaxies. The goals of the study were: (1) to begin to establish a K band baseline of normal spiral galaxy nuclear regions against which peculiar galaxies may be compared, (2) to provide better constraints on N-body models, and (3) to complement near-infrared studies of large scale structure in spiral galaxies with very high resolution imaging of the important nuclear regions. The principal findings are: (1) between 1/4 and 1/3 of these nuclear regions show K band evidence of triaxiality, (2) approximately 1/2 of these galaxies have axisymmetric nuclear regions, and (3) NGC 4321 has a bar that is not detectable in the optical images. Description: The tables contain elliptical isophotes interactively fit to the K images using the Space Telescope Science Data Analysis Software (STSDAS) task ELLIPSE. File Summary: -------------------------------------------------------------------------------- File Name Lrecl Records Explanations -------------------------------------------------------------------------------- ngc4192.dat 41 18 NGC 4192 K band surface photometry ngc4216.dat 41 11 NGC 4216 K band surface photometry ngc4254.dat 41 20 NGC 4254 K band surface photometry ngc4303.dat 41 17 NGC 4303 K band surface photometry ngc4321.dat 41 23 NGC 4321 K band surface photometry ngc4394.dat 41 18 NGC 4394 K band surface photometry ngc4438.dat 41 20 NGC 4438 K band surface photometry ngc4457.dat 41 18 NGC 4457 K band surface photometry ngc4501.dat 41 17 NGC 4501 K band surface photometry ngc4535.dat 41 20 NGC 4535 K band surface photometry ngc4548.dat 41 16 NGC 4548 K band surface photometry ngc4567.dat 41 11 NGC 4567 K band surface photometry ngc4568.dat 41 24 NGC 4568 K band surface photometry ngc4639.dat 41 23 NGC 4639 K band surface photometry ngc4651.dat 41 22 NGC 4651 K band surface photometry -------------------------------------------------------------------------------- Byte-by-byte Description of file: ngc4192.dat ngc4216.dat ngc4254.dat ngc4303.dat ngc4321.dat ngc4394.dat ngc4438.dat ngc4457.dat ngc4501.dat ngc4535.dat ngc4548.dat ngc4567.dat ngc4568.dat ngc4639.dat ngc4651.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 6 F6.3 arcsec MajAxis Semi-major axis 7-14 F8.3 mag/arcsec2 SurfBr Surface brightness 15-19 F5.2 mag/arcsec2 e_SurfBr Surface brightness relative error 20-26 F7.3 --- Ellip Ellipticity 27-31 F5.2 --- e_Ellip Ellipticity probable error 32-36 I5 deg PA Position angle, north through east 37-41 I5 deg e_PA Position angle probable error -------------------------------------------------------------------------------- ================================================================================ (End) Lee Brotzman [ADS] 04-May-1995