Weak Gravitational Lensing around Field Galaxies in HST Survey Images

Details Weak Gravitational Lensing around Field Galaxies in HST Survey Images Weak Gravitational Lensing around Field Galaxies in HST Survey Images

1996-05-17

arxiv.org/abs/astro-ph/9605109v1

Astronomy and Astrophysics

Astrophysics

To be published in MNRAS letters, 5 pages, 4 figures

Scientific paper

Using data from the HST Medium Deep Survey, a long-term Key Project, together with generically similar archived data, we have discovered evidence for weak gravitational `shear' of background field galaxies (I = 22 -- 26) in the vicinity of isolated, foreground galaxies ( I = 15 -- 22), especially those of early type. The statistical lensing is demonstrated by the slight preferential orientation of the major axes of the background galaxies in directions at right angles to the lines joining them to the foreground ones. The detected shear is at the level of $\delta\phi = 2.5^{o}\pm 1.2^{o}$ averaged over the background galaxies at about ~10 half-light radii from 400 foreground ellipticals, corresponding to a polarization of about 0.04. A positive but less significant result is also reported for foreground spirals. This result excludes the de Vaucouleurs model for the mass distribution of ellipticals, but is consistent with elliptical galaxies having total M/L ~ 100 and extensive dark halos.

Affiliated with

Also associated with

No associations

Rating

Weak Gravitational Lensing around Field Galaxies in HST Survey Images 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 Weak Gravitational Lensing around Field Galaxies in HST Survey Images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Weak Gravitational Lensing around Field Galaxies in HST Survey Images will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-719687