MgII absorbers high-resolution QSOs spectra. I. Virtual Observatory Resource

Authors
  1. Churchill C.W.
  2. Evans J.L.
  3. Stemock B.
  4. Nielsen N.M.
  5. Kacprzak G.G.,Murphy M.T.
  6. Published by
    CDS
Abstract

We present the Voigt profile (VP) models, column densities, Doppler b parameters, kinematics, and distribution of components for 422 MgII absorbers found in a survey of 249 HIRES and UVES quasar spectra. The equivalent width range of the sample is 0.006<~W_r_(2796)<~6.23{AA} and the redshift range is 0.19<~z<~2.55, with a mean of <z>=1.18. Based on historical precedent, we classified 180 absorbers as weak systems (W_r_(2796)<0.3{AA}) and 242 as strong systems (W_r_(2796)>~0.3{AA}). Assuming a minimum number of significant components per system, the VP fitting, yielded a total of 2989 components, with an average of 2.7 and 10.3 components found for the weak and strong MgII subsamples, respectively. The VP component line density for the full sample is 8.62{+/-}0.23clouds/{AA}. The distribution of VP component column density over the range 12.4<~logN(MgII)<~17.0/cm^2^ is well modeled with a power-law slope of -1.45{+/-}0.01. The median Doppler b parameters are 4.5{+/-}3.5km/s, 6.0{+/-}4.5km/s, and 5.7{+/-}4.4km/s for the weak, strong, and full samples. We modeled the probability of component velocity splitting (the two-point velocity correlation function) of our full sample using a three-component composite Gaussian function. Our resulting velocity dispersions are {sigma}_1_=25.4km/s, {sigma}_2_=68.7km/s, and {sigma}_3_=207.1km/s. These data provide an excellent database for studying the cosmic evolution of MgII absorber kinematic evolution.

Keywords
  1. quasars
  2. visible-astronomy
  3. spectroscopy
  4. infrared-astronomy
  5. redshifted
  6. chemical-abundances
Bibliographic source Bibcode
2020ApJ...904...28C
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/904/28
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/904/28
Document Object Identifer DOI
doi:10.26093/cds/vizier.19040028

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/904/28
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/904/28
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/904/28
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/904/28/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/904/28/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/904/28/table1?

History

2022-03-18T07:00:00Z
Resource record created
2022-03-18T07:00:00Z
Created
2022-06-13T09:50:54Z
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