At the low-mass end - Light and H I distribution of GR 8

Details At the low-mass end - Light and H I distribution of GR 8 At the low-mass end - Light and H I distribution of GR 8

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99..178c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 99, Jan. 1990, p. 178-190. Research supported by NSERC.

Astronomy and Astrophysics

Astronomy

73

Astronomical Photometry, Dwarf Galaxies, Galactic Mass, H I Regions, Irregular Galaxies, Light Sources, Color-Magnitude Diagram, Dark Matter, Mass Distribution, Virgo Galactic Cluster

Scientific paper

The dwarf irregular galaxy GR 8, which is at the extreme faint end of the luminosity and mass functions, is studied using optical photometry and 21 cm H I line observations. For the light distribution, an exponential decline (as usual for more massive systems) is found with an extrapolated central surface brightness of B(O)c = 22.6 mag/sq arcsec and a scale length of 76 pc. The colors are typical of Im galaxies with (B - V) = 0.38. The H I is found to be clumpy with most of the gas just outside the optical image. Its radial distribution is well approximated by a Gaussian. From the kinematics, it is found that, contrary to what is normally observed, the rotation axis of the gas is parallel to the common major axis of the optical and H I distribution and not perpendicular. It is shown that rotation is only important to the gravitational support of the system in the inner parts (r less than 250 pc).

Affiliated with

Also associated with

No associations

Rating

At the low-mass end - Light and H I distribution of GR 8 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 At the low-mass end - Light and H I distribution of GR 8, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and At the low-mass end - Light and H I distribution of GR 8 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1560134