Evidence of increased UV fe ii emission in quasars in candidate overdense regions

Kathryn A. Harris, G. M. Williger, L. Haberzettl, S. Mitchell, D. Farrah, M. J. Graham, R. Davé, M. P. Younger, I. K. Söchting

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We present evidence for a skewed distribution of UV Fe II emission in quasars within candidate overdense regions spanning spatial scales of~50 Mpc at 1.11<z<1.67, compared to quasars in field environments at comparable redshifts. The overdense regions have an excess of highequivalent- width sources (W2400 > 42 Å) and a dearth of low-equivalent-width sources. There are various possible explanations for this effect, including dust, Lyα fluorescence, microturbulence and iron abundance. We find that the most plausible of these is enhanced iron abundance in the overdense regions, consistent with an enhanced star formation rate in the overdense regions compared to the field.

Original languageEnglish (US)
Pages (from-to)3125-3132
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Volume435
Issue number4
DOIs
StatePublished - Nov 2013

Keywords

  • Galaxies: Abundances
  • Galaxies: Active
  • Large-scale structure of universe
  • Quasars: Emission lines

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Harris, K. A., Williger, G. M., Haberzettl, L., Mitchell, S., Farrah, D., Graham, M. J., Davé, R., Younger, M. P., & Söchting, I. K. (2013). Evidence of increased UV fe ii emission in quasars in candidate overdense regions. Monthly Notices of the Royal Astronomical Society, 435(4), 3125-3132. https://doi.org/10.1093/mnras/stt1508