78 citations · 464 across the 35 of their papers we have counts for
5 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…
Host Galaxy Extinction of SNIa: Co-evolution of ISM Structure and Extinction Law with Star-Formation
B. W. Holwerda
This paper presents a mechanism that may modify the extinction law for SNIa observed at higher redshift. Starting from the observations that (1) SNIa occur predominantly in spiral…
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…
The Vertical Dust Structure in Spiral Disks
B. W. Holwerda, P. Kamphuis, R. J. Allen +2
The halo of NGC 891 has been the subject of studies for more than a decade. One of its most striking features is the large asymmetry in H- emission. We have taken a quantitative…