A search for dark matter in elliptical galaxies.

Details A search for dark matter in elliptical galaxies. A search for dark matter in elliptical galaxies.

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989msngr..56...19b&link_type=abstract

The Messenger, vol. 56, p. 19-21

Mathematics

Logic

13

Elliptical Galaxies: Dark Matter

Scientific paper

One of the most remarkable discoveries of recent years is that of the presence of extended dark massive halos around spiral galaxies (see e.g. Rubin 1986). For these galaxies, the overall mass distribution is inferred from rotation curves derived from both ionized gas and atomic hydrogen emission. The best evidence for dark matter comes from the fact that the rotation curves remain flat, well beyond the optical disk. This result implies that the mass-to-light ratio M/L increases outwards, indicating a substantial amount of dark matter at large radii. A well-known case is NGC 31 98, where the observed H I rotation curve is flat out to 11 exponential scale lengths h; here even the conservative maximum-disk analysis requires a dark to luminous mass ratio Md/Ml = 0.8 at R25 and Md/Ml = 3.9 at the outer edge (R = 1 1 h) (van Albada et al. 1985). The cosmological consequences of this result have been widely discussed in the context of the problem of the "missing mass" in the universe.

Affiliated with

Also associated with

No associations

Rating

A search for dark matter in elliptical galaxies. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A search for dark matter in elliptical galaxies., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A search for dark matter in elliptical galaxies. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1856006