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Neutral Hydrogen Gas in Star Forming Galaxies at z=0.24

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Date

2008

Authors

Lah, Philip
Chengalur, Jayaram
Briggs, Franklin
Colless, Matthew
De Propris, Roberto
Pracy, Michael
de Blok, Willem

Journal Title

Journal ISSN

Volume Title

Publisher

Cambridge University Press

Abstract

We use observations from the Giant Metrewave Radio Telescope (GMRT) to measure the atomic hydrogen gas content of star-forming galaxies at z = 0.24 (i.e. a look-backtime of ~3 Gyr). To measure the HI 21 cm emission signal we stack the signal from 121 galaxies with known optical positions and redshifts. We find an average HI mass for the galaxies of (2.26 0.90) 109 M. We translate this HI measurement into a cosmic density of neutral gas at z=0.24 of gas = (0.91 0.42) 103. This value is consistent with that estimated from damped Ly systems around this redshift.

Description

Keywords

Keywords: Galaxies: evolution; Galaxies: ISM; Radio continuum: galaxies; Radio lines: galaxies

Citation

URI

http://hdl.handle.net/1885/18028

Collections

Open Access Research

Source

Dark Galaxies and Lost Baryons

Type

Conference paper

Book Title

Entity type

Access Statement

License Rights

DOI

10.1017/S1743921307014305

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