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

doi:10.1093/mnras/stt1508

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

Steward Observatory

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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 language	English (US)
Pages (from-to)	3125-3132
Number of pages	8
Journal	Monthly Notices of the Royal Astronomical Society
Volume	435
Issue number	4
DOIs	https://doi.org/10.1093/mnras/stt1508
State	Published - 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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10.1093/mnras/stt1508

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title = "Evidence of increased UV fe ii emission in quasars in candidate overdense regions",

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 42 {\AA}) 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.",

keywords = "Galaxies: Abundances, Galaxies: Active, Large-scale structure of universe, Quasars: Emission lines",

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language = "English (US)",

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T1 - Evidence of increased UV fe ii emission in quasars in candidate overdense regions

AU - Harris, Kathryn A.

AU - Williger, G. M.

AU - Haberzettl, L.

AU - Mitchell, S.

AU - Farrah, D.

AU - Graham, M. J.

AU - Davé, R.

AU - Younger, M. P.

AU - Söchting, I. K.

PY - 2013/11

Y1 - 2013/11

N2 - 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 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.

AB - 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 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.

KW - Galaxies: Abundances

KW - Galaxies: Active

KW - Large-scale structure of universe

KW - Quasars: Emission lines

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

Abstract

Keywords

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