Dissecting a galaxy: mass distribution of 2237+0305

Details Dissecting a galaxy: mass distribution of 2237+0305 Dissecting a galaxy: mass distribution of 2237+0305

2002-03-13

arxiv.org/abs/astro-ph/0203196v2

Mon.Not.Roy.Astron.Soc. 334 (2002) 621

Astronomy and Astrophysics

Astrophysics

11 pages, 6 figures, accepted by MNRAS, in press

Scientific paper

10.1046/j.1365-8711.2002.05542.x

We determine the mass distribution of a spiral galaxy, 2237+0305 using both gravitational lensing and dynamical constraints. We find that lensing can break the disc-halo degeneracy. 2237+0305 has a sub-maximal disc, contributing 57+/-3 per cent of the rotational support at the disc maximum. The disc mass-to-light ratio is 1.1+/-0.2 in the I-band and the bulge, 2.9+/-0.5. The dark matter halo, modelled as a softened isothermal sphere, has a large core radius (13.4+/-0.4 kpc, equivalent to 1.4r_d) to high accuracy for the best-fitting solution. The image positions are reasonably well fitted, but require further rotation information to obtain a unique solution.

Affiliated with

Also associated with

No associations

Rating

Dissecting a galaxy: mass distribution of 2237+0305 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 Dissecting a galaxy: mass distribution of 2237+0305, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dissecting a galaxy: mass distribution of 2237+0305 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-252772