Neutral hydrogen gas in star forming galaxies at z=0.24

Philip Lah*, Jayaram N. Chengalur, Frank H. Briggs, Matthew Colless, Roberto De Propris, Michael B. Pracy, W. J.G. De Blok

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    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.

    Original languageEnglish
    Pages (from-to)366-367
    Number of pages2
    JournalProceedings of the International Astronomical Union
    Volume3
    Issue numberS244
    DOIs
    Publication statusPublished - Jun 2007

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