Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.9708o&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #97.08; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
We present results from a study of the presence of dust lanes in edge-on galaxies. Our sample consists of 281 edge-on galaxies selected from the Sloan Digital Sky Survey (SDSS), all of which have single dish HI data. We combined the SDSS optical data with NIR images from the 2 Micron All Sky Survey (2MASS) to produce false color optical-NIR images for 168 galaxies. We visually inspect the resulting images for the presence of dust lanes. We show that the presence of dust lanes is a strong function of rotation speed, confirming previous results, which found that dust lanes are absent in low mass galaxies. For our larger, more diverse sample, the transition occurs at rotation speeds of 140 km/s, slightly higher than the original 120 km/s seen in the bulge-less undisturbed sample studied previously. Only 25 galaxies (9%) do not follow the transition. We discuss the outliers and the possible causes for the differences in the dust lane presence as well as their morphology.
Dalcanton Julianne J.
Obric Mirela
West Andrew A.
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