Program: GS-2008B-Q-50
| Title: | Tracing the IGM-galaxy distribution around three closely-spaced QSO sight-lines |
| PI: | Neil Crighton |
| Co-I(s): | Simon Morris, Allen Shone, Buell Jannuzi, Jill Bechtold |
Abstract
The distribution of the gaseous intergalactic medium (IGM) around galaxies is fundamentally important to our understanding of galaxy evolution. We propose to use GMOS in MOS mode to observe galaxies at z<1.0 around three QSO sight-lines to directly compare the 3-D IGM gas distribution to the large scale structure as traced by galaxies in the same volume. The unusual combination of three closely-spaced sight-lines allows us to simultaneously constrain the size and geometry of gas overdensities in the IGM, which is not possible with only one or two QSO sight-lines. The QSOs have emission redshifts of 0.96,96 and 0.73, and archival HST FOS spectra exist covering their Lyman-alpha forest region. The sight-lines within each group have separations of ~400 kpc to ~1 Mpc and thus probe the expected scales of gas overdensities. These observations will show whether IGM absorbers follow the same large-scale structure traced by galaxies up to z=1.
Publications using this program's data
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[data]
[ADS] On the connection between the intergalactic medium and galaxies: the H I-galaxy cross-correlation at z ≲ 1
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[data]
[ADS] On the connection between the metal-enriched intergalactic medium and galaxies: an O VI-galaxy cross-correlation study at z < 1
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[data]
[ADS] Pair lines of sight observations of multiphase gas bearing O VI in a galaxy environment
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[data]
[ADS] The relationship between gas and galaxies at z < 1 using the Q0107 quasar triplet
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[data]
[ADS] Signatures of extended discs and outflows in the circumgalactic medium using the Q0107 quasar triplet
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[data]
[ADS] Modelling gas around galaxy pairs and groups using the Q0107 quasar triplet