7 papers · 1 filter
An extended dust disk in a spiral galaxy; An occulting galaxy pair in ANGST
B. W. Holwerda, W. C. Keel, B. Williams +2
We present an analysis of an occulting galaxy pair, serendipitously discovered in ACS Nearby Galaxy Survey Treasury (ANGST) observations of NGC 253 taken with Hubble Space Telescop…
Spitzer's View of Edge-on Spirals
B. W. Holwerda, R. S. de Jong, A. Seth +4
Edge-on spiral galaxies offer a unique perspective on disks. One can accurately determine the height distribution of stars and ISM and the line-of-sight integration allows for the…
Structure and Evolution of the Opacity of Spiral Disks
B. W. Holwerda, R. A. Gonzalez, W. C. Keel +3
The opacity of a spiral disk due to dust absorption influences every measurement we make of it in the UV and optical. Two separate techniques directly measure the total absorption…
Structure and Evolution of the Opacity of Spiral Disks
B. W. Holwerda, R. A. González, W. C. Keel +3
The opacity of a spiral disk due to dust absorption influences every measurement we make of it in the UV and optical. Two separate techniques directly measure the total absorption…
Spitzer's View of Edge-on Spirals
B. W. Holwerda, R. S. de Jong, A. Seth +4
Edge-on spiral galaxies offer a unique perspective on disks. One can accurately determine the height distribution of stars and ISM and the line-of-sight integration allows for the…
Galaxy Structural Parameters in Source Extractor
B. W. Holwerda
Over the last decade, the Concentration, Asymmetry and Smoothness (CAS), as well as the M20 and GINI parameters have become popular to automatically classify distant galaxies in im…