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The Rotation Velocity - Density Relation | | Lorraine A. Allen
; Margaret J. Geller
; | | Date: |
29 May 1996 | | Abstract: | We have assembled 21-cm linewidths for 376 of the 732 galaxies in a magnitude-limited redshift survey of the the Perseus-Pisces region.
We analyze a distance limited subset of 271 galaxies (131 widths) to examine the relationship between linewidth and local density. The sample indicates that galaxies with linewidths $gtrsim 480$ km/s are absent from regions where the galaxy density is $lesssim 0.03$ galaxies Mpc$^{-3}$ ($M_{B(0)}< -18.3$). This effect is in the direction predicted by standard CDM models. Galaxies with linewidths $lesssim$ 480 km/s appear throughout the sample.
The observational constraints could be substantially improved with a larger sample, IR photometry, and more uniform 21-cm data. | | Source: | arXiv, astro-ph/9605173 | | Services: | Forum | Review | PDF | Favorites | |
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