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- Title
Tidal Structures of z∼1 Galaxies in the Hubble Deep Field.
- Authors
Reshetnikov, V. P.
- Abstract
An analysis of the images of objects in the Northern Hubble Space Telescope Deep Field has revealed twelve galaxies with tidal tails at redshifts from 0.5 to 1.5. The integrated characteristics of the newly discovered tidal structures are found to be similar to those of the tails of local interacting galaxies. The space density of galaxies with tidal tails is found to depend on z as (1 + z)[sup 4 ± 1 (q[sub 0] = 0.05), according to the data on objects with z = 0.5-1.0. The exponent decreases to 3.6 if barred galaxies are included. The change in the rate of close encounters between galaxies of comparable masses (i.e., those that produce extended tidal structures) is estimated. If the rate of galactic mergers is governed by the same process, our data are indicative of the rapid evolution of galaxy merger rate toward z ∼ 1.
- Subjects
GALAXIES; HUBBLE deep field
- Publication
Astronomy Letters, 2000, Vol 26, Issue 2, p61
- ISSN
1063-7737
- Publication type
Article
- DOI
10.1134/1.20369