GAMA blended spectra catalogue Virtual Observatory Resource

Authors
  1. Holwerda B.W.
  2. Baldry I.K.
  3. Alpaslan M.
  4. Bauer A.
  5. Bland-Hawthorn J.,Brough S.
  6. Brown M.J.I.
  7. Cluver M.E.
  8. Conselice C.
  9. Driver S.P.,Hopkins A.M.
  10. Jones D.H.
  11. Lopez-Sanchez A.R.
  12. Loveday J.
  13. Meyer M.J.,Moffett A.
  14. Published by
    CDS
Abstract

We present the catalogue of blended galaxy spectra from the Galaxy And Mass Assembly (GAMA) survey. These are cases where light from two galaxies are significantly detected in a single GAMA fibre. Galaxy pairs identified from their blended spectrum fall into two principal classes: they are either strong lenses, a passive galaxy lensing an emission-line galaxy; or occulting galaxies, serendipitous overlaps of two galaxies, of any type. Blended spectra can thus be used to reliably identify strong lenses for follow-up observations (high-resolution imaging) and occulting pairs, especially those that are a late-type partly obscuring an early-type galaxy which are of interest for the study of dust content of spiral and irregular galaxies. The GAMA survey setup and its AUTOZ automated redshift determination were used to identify candidate blended galaxy spectra from the cross-correlation peaks. We identify 280 blended spectra with a minimum velocity separation of 600km/s, of which 104 are lens pair candidates, 71 emission-line-passive pairs, 78 are pairs of emission-line galaxies and 27 are pairs of galaxies with passive spectra. We have visually inspected the candidates in the Sloan Digital Sky Survey (SDSS) and Kilo Degree Survey (KiDS) images. Many blended objects are ellipticals with blue fuzz (Ef in our classification). These latter 'Ef' classifications are candidates for possible strong lenses, massive ellipticals with an emission-line galaxy in one or more lensed images. The GAMA lens and occulting galaxy candidate samples are similar in size to those identified in the entire SDSS. This blended spectrum sample stands as a testament of the power of this highly complete, second-largest spectroscopic survey in existence and offers the possibility to expand e.g. strong gravitational lens surveys.

Keywords
  1. galaxies
  2. spectroscopy
  3. redshifted
  4. gravitational-lensing
Bibliographic source Bibcode
2015MNRAS.449.4277H
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/449/4277
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/449/4277
Document Object Identifer DOI
doi:10.26093/cds/vizier.74494277

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/449/4277
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/449/4277
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/449/4277
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/MNRAS/449/4277/table3?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/449/4277/table3?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/449/4277/table3?

History

2016-02-12T13:34:09Z
Resource record created
2016-02-12T13:34:09Z
Created
2024-08-14T20:21:26Z
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