MACSJ1206.2-08474714 clumps photometry Virtual Observatory Resource

Authors
  1. Cava A.
  2. Schaerer D.
  3. Richard J.
  4. Perez-Gonzalez P.G.,Dessauges-Zavadsky M.
  5. Mayer L.
  6. Tamburello V.
  7. Published by
    CDS
Abstract

Giant stellar clumps are ubiquitous in high-redshift galaxies. They are thought to play an important role in the build-up of galactic bulges and as diagnostics of star formation feedback in galactic discs4. Hubble Space Telescope (HST) blank field imaging surveys have estimated that these clumps have masses of up to 10^9.5^M_{sun}_ and linear sizes of ~1kpc. Recently, gravitational lensing has also been used to get higher spatial resolution. However, both recent lensed observations and models suggest that the clumps' properties may be overestimated by the limited resolution of standard imaging techniques. A definitive proof of this observational bias is nevertheless still missing. Here we investigate directly the effect of resolution on clump properties by analysing multiple gravitationally lensed images of the same galaxy at different spatial resolutions, down to 30pc. We show that the typical mass and size of giant clumps, generally observed at ~1kpc resolution in high-redshift galaxies, are systematically overestimated. The high spatial resolution data, only enabled by strong gravitational lensing using currently available facilities, support smaller scales of clump formation by fragmentation of the galactic gas disk via gravitational instabilities.

Keywords
  1. galaxy-clusters
  2. gravitational-lensing
  3. hst-photometry
  4. ultraviolet-photometry
  5. visible-astronomy
  6. infrared-astronomy
Bibliographic source Bibcode
2018NatAs...2...76C
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/NatAs/2.76
IVOA Identifier IVOID
ivo://CDS.VizieR/J/other/NatAs/2.76

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/NatAs/2.76
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/NatAs/2.76
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/NatAs/2.76
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/NatAs/2.76/table4?
https://vizier.iucaa.in/viz-bin/conesearch/J/other/NatAs/2.76/table4?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/NatAs/2.76/table4?

History

2023-08-30T16:18:26Z
Resource record created
2023-08-30T16:18:26Z
Created
2023-11-09T12:55:10Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr