The cosmic evolution of the metal content of the intergalactic medium puts stringent constraints on the properties of galactic outflows and on the nature of UV background. In this paper, we present a new measure of the redshift evolution of the mass density of C IV, Omega(C) (IV), in the interval 1.5 less than or similar to z less than or similar to 4 based on a sample of more than 1500 C IV lines with column densities 10(12) less than or similar to N(C IV) less than or similar to 10(15) cm(-2). This sample more than doubles the absorption redshift path covered in the range z < 2.5 by previous samples. The result shows a significant increase of Omega(C IV) towards the lower redshifts at variance with the previously pictured constant behaviour.

The rise of the CIV mass density at z < 2.5 / D'Odorico, V.; Calura, F.; Cristiani, S.; Viel, Matteo. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - 401:4(2010), pp. 2715-2721. [10.1111/j.1365-2966.2009.15856.x]

The rise of the CIV mass density at z < 2.5

Viel, Matteo
2010-01-01

Abstract

The cosmic evolution of the metal content of the intergalactic medium puts stringent constraints on the properties of galactic outflows and on the nature of UV background. In this paper, we present a new measure of the redshift evolution of the mass density of C IV, Omega(C) (IV), in the interval 1.5 less than or similar to z less than or similar to 4 based on a sample of more than 1500 C IV lines with column densities 10(12) less than or similar to N(C IV) less than or similar to 10(15) cm(-2). This sample more than doubles the absorption redshift path covered in the range z < 2.5 by previous samples. The result shows a significant increase of Omega(C IV) towards the lower redshifts at variance with the previously pictured constant behaviour.
2010
401
4
2715
2721
https://arxiv.org/abs/0910.2126
D'Odorico, V.; Calura, F.; Cristiani, S.; Viel, Matteo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/12720
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