Clumps identified in z<0.06 SDSS Stripe 82 sample Virtual Observatory Resource

Authors
  1. Mehta V.
  2. Scarlata C.
  3. Fortson L.
  4. Dickinson H.
  5. Adams D.
  6. Chevallard J.,Charlot S.
  7. Beck M.
  8. Kruk S.
  9. Simmons B.
  10. Published by
    CDS
Abstract

Giant, star-forming clumps are a common feature prevalent among high-redshift star-forming galaxies and play a critical role in shaping their chaotic morphologies and yet, their nature and role in galaxy evolution remains to be fully understood. A majority of the effort to study clumps has been focused at high redshifts, and local clump studies have often suffered from small sample sizes. In this work, we present an analysis of clump properties in the local universe, and for the first time, performed with a statistically significant sample. With the help of the citizen science-powered Galaxy Zoo: Hubble project, we select a sample of 92 z<0.06 clumpy galaxies in Sloan Digital Sky Survey Stripe 82 galaxies. Within this sample, we identify 543 clumps using a contrast-based image analysis algorithm and perform photometry as well as estimate their stellar population properties. The overall properties of our z<0.06 clump sample are comparable to the high-redshift clumps. However, contrary to the high-redshift studies, we find no evidence of a gradient in clump ages or masses as a function of their galactocentric distances. Our results challenge the inward migration scenario for clump evolution for the local universe, potentially suggesting a larger contribution of ex situ clumps and/or longer clump migration timescales.

Keywords
  1. galaxies
  2. visible-astronomy
  3. sloan-photometry
  4. chemical-abundances
  5. redshifted
  6. star-forming-regions
  7. extinction
Bibliographic source Bibcode
2021ApJ...912...49M
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/912/49
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/912/49
Document Object Identifer DOI
doi:10.26093/cds/vizier.19120049

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/912/49
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/912/49
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/912/49
IVOA Table Access TAP
https://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).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/912/49/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/912/49/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/912/49/table1?

History

2022-11-22T17:30:11Z
Resource record created
2022-11-22T17:30:11Z
Created
2022-12-05T13:55:41Z
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