Origin of Metals around Galaxies. I. Catalogs of Metal-line Absorption Doublets from High-resolution Quasar Spectra - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue The Astrophysical journal letters Année : 2018

Origin of Metals around Galaxies. I. Catalogs of Metal-line Absorption Doublets from High-resolution Quasar Spectra

Lluís Mas-Ribas
  • Fonction : Auteur
Signe Riemer-Sørensen
  • Fonction : Auteur
Joseph F. Hennawi
  • Fonction : Auteur
Jordi Miralda-Escudé
  • Fonction : Auteur
John M. O'Meara
  • Fonction : Auteur
Michael T. Murphy
  • Fonction : Auteur
John K. Webb
  • Fonction : Auteur
Joseph Hennawi
John O’meara
  • Fonction : Auteur
John Webb
  • Fonction : Auteur

Résumé

We present the first paper of the series Origin of Metals around Galaxies (OMG) aimed to study the origin of the metals observed in the circumgalactic and intergalactic media. In this work we extract and build the catalogs of metal absorbers that will be used in future analyses, and make our results publicly available to the community. We design a fully automatic algorithm to search for absorption metal-line doublets of the species CIV, NV, SiIV and MgII in high-resolution ($R\gtrsim30\,000$) quasar spectra without human intervention, and apply it to the high-resolution and signal-to-noise ratio spectra of 690 quasars, observed with the UVES and HIRES instruments. We obtain $5\,656$ CIV doublets, $7\,919$ doublets of MgII, $2\,258$ of SiIV, and 239 of NV, constituting the largest high-resolution metal-doublet samples to date, and estimate the dependence of their completeness and purity on various doublet parameters such as equivalent width and redshift, using real and artificial quasar spectra. The catalogs include doublets with rest-frame line equivalent widths down to a few ${\rm m\AA}$, all detected at a significance above 3$\sigma$, and covering the redshifts between $1

Dates et versions

hal-02044552 , version 1 (21-02-2019)

Identifiants

Citer

Lluís Mas-Ribas, Signe Riemer-Sørensen, Joseph F. Hennawi, Jordi Miralda-Escudé, John M. O'Meara, et al.. Origin of Metals around Galaxies. I. Catalogs of Metal-line Absorption Doublets from High-resolution Quasar Spectra. The Astrophysical journal letters, 2018, 862 (1), pp.50. ⟨10.3847/1538-4357/aac81a⟩. ⟨hal-02044552⟩
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