Issue |
A&A
Volume 449, Number 1, April I 2006
|
|
---|---|---|
Page(s) | 67 - 78 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361:20054065 | |
Published online | 16 March 2006 |
Surface photometry and structure of high redshift disk galaxies in the HDF-S NICMOS field
1
Institute of Theoretical Physics, Tartu University, Tähe 4, Tartu, 51010, Estonia
2
Tartu Observatory, Tõravere, Tartumaa, 61602 Estonia e-mail: [atamm;ptenjes]@ut.ee
Received:
18
August
2005
Accepted:
22
November
2005
Aims.We report on a photometric study of a sample of 22 disk galaxies in
the Hubble Deep Field South NICMOS parallel field. The redshift
range of the galaxies is .Methods.We use deep NICMOS J and H
band and STIS open mode images, taken as part of the HDF-S project,
to construct rest-frame B-profiles and
color profiles of
the galaxies. Before fitting isophotes, images are deconvolved with
PSF. Derived surface brightness profiles are approximated by
Sérsic luminosity distribution.Results.Significantly large population
of disks cannot be represented by an exponential disk, but this can
be well done by Sérsic law, if
. This might be the same
phenomenon which has earlier been referred to as truncation of
disks. Parameter n does not vary significantly with redshift.
Galactic sizes decrease with redshift as
.
The rest frame
color shows a clear decrease at
,
concordantly with the understanding of more intense star formation
at earlier epochs. Color gradients
are small
and roughly constant at
. At
, dominantly positive
gradients appear, possibly indicating centrally concentrated
star-formation. On the basis of
color and chemical evolution
models, the disks observed at
have formed between
. Scale radii re of the galaxies correlate with the
scale surface brightnesses
for the sample. None of the
studied parameters shows clear dependence on absolute B luminosity
for the galaxies.
© ESO, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.