The Edge of the Galactic Disc

Details The Edge of the Galactic Disc The Edge of the Galactic Disc

1992-10-02

arxiv.org/abs/astro-ph/9210001v1

Astrophys.J. 400 (1992) L25

Astronomy and Astrophysics

Astrophysics

8 pages, Besancon Observatory preprint n. 2

Scientific paper

10.1086/186640

As part of a stellar population sampling program, a series of photometric probes at various field sizes and depths have been obtained in a low extinction window in the galactic anticentre direction. Such data set strong constraints on the radial structure of the disc. At the forefront of this "drilling" program, very deep CCD frames probe the most external parts of the disc. Over the whole effective magnitude range (18 to 25), all contributions in the statistics which should be expected from old disc stars beyond 6 kpc vanish, although such stars dominate by far at distances less than 5 kpc. This is the signature of a sharp cut-off in the star density: the edge of the galactic disc between 5.5 and 6 kpc. As a consequence, the galactic radius does not exceed 14 kpc (assuming $R/-/(//sun/)$=8.5). Colours of elliptical galaxies measured in the field rule out the risk of being misled by undetected extinction.

Affiliated with

Also associated with

No associations

Rating

The Edge of the Galactic Disc 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 The Edge of the Galactic Disc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Edge of the Galactic Disc will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-370299