The Westerbork HI Survey of Spiral and Irregular Galaxies II. R-Band Surface Photometry of Late-type Dwarf Galaxies

TL;DR

This study provides detailed R-band surface photometry for 171 late-type dwarf and irregular galaxies, including photometric parameters and HI data, supporting research on their structure and dark matter content.

Contribution

It offers a comprehensive photometric dataset for late-type dwarf galaxies, including B-band data for a subset, and integrates HI observations from the WHISP project, enhancing understanding of their properties.

Findings

Photometry accurate to 0.1 mag for 77% of the sample.

Surface brightness profiles consistent with previous data within uncertainties.

HI data available for most galaxies, enabling kinematic and dark matter studies.

Abstract

R-band surface photometry is presented for 171 late-type dwarf and irregular galaxies. For a subsample of 46 galaxies B-band photometry is presented as well. We present surface brightness profiles as well as isophotal and photometric parameters including magnitudes, diameters and central surface brightnesses. Absolute photometry is accurate to 0.1 mag or better for 77% of the sample. For over 85% of the galaxies the radial surface brightness profiles are consistent with published data within the measured photometric uncertainty. For most of the galaxies in the sample HI data have been obtained with the Westerbork Synthesis Radio Telescope. The galaxies in our sample are part of the WHISP project (Westerbork HI Survey of Spiral and Irregular Galaxies), which aims at mapping about 500 nearby spiral and irregular galaxies in HI. The availability of HI data makes this data set useful for a wide range of studies of the structure, dark matter content and kinematics of late-type dwarf galaxies.