Skip to main content

Research Repository

Advanced Search

Probing dark energy with future redshift surveys: a comparison of emission line and broad-band selection in the near-infrared

Orsi, A.; Baugh, C.M.; Lacey, C.G.; Cimatti, A.; Wang, Y.; Zamorani, G.

Probing dark energy with future redshift surveys: a comparison of emission line and broad-band selection in the near-infrared Thumbnail


Authors

A. Orsi

A. Cimatti

Y. Wang

G. Zamorani



Abstract

Future galaxy surveys will map the galaxy distribution in the redshift interval 0.5 < z < 2 using near-infrared cameras and spectrographs. The primary scientific goal of such surveys is to constrain the nature of the dark energy by measuring the large-scale structure of the Universe. This requires a tracer of the underlying dark matter which maximizes the useful volume of the survey. We investigate two potential survey selection methods: an emission-line sample based on the Hα line and a sample selected in the H band. We present predictions for the abundance and clustering of such galaxies, using two published versions of the galform galaxy formation model. Our models predict that Hαselected galaxies tend to avoid massive dark matter haloes and instead trace the surrounding filamentary structure; H-band selected galaxies, on the other hand, are found in the highest mass haloes. This has implications for the measurement of the rate at which fluctuations grow due to gravitational instability. We use mock catalogues to compare the effective volumes sampled by a range of survey configurations. To give just two examples: a redshift survey down to HAB= 22 samples an effective volume that is approximately five to 10 times larger than that probed by an Hα survey with log(FHα[erg s−1 cm−2]) > −15.4 and a flux limit of at least log(FHα[erg s−1 cm−2]) =−16 is required for an Hα sample to become competitive in effective volume.

Citation

Orsi, A., Baugh, C., Lacey, C., Cimatti, A., Wang, Y., & Zamorani, G. (2010). Probing dark energy with future redshift surveys: a comparison of emission line and broad-band selection in the near-infrared. Monthly Notices of the Royal Astronomical Society, 405(2), 1006-1024. https://doi.org/10.1111/j.1365-2966.2010.16585.x

Journal Article Type Article
Publication Date Jun 21, 2010
Deposit Date Jan 31, 2012
Publicly Available Date Nov 26, 2014
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 405
Issue 2
Pages 1006-1024
DOI https://doi.org/10.1111/j.1365-2966.2010.16585.x
Keywords Methods: numerical, Galaxies: evolution, Galaxies: high-redshift, Dark energy, Large-scale structure of Universe
Public URL https://durham-repository.worktribe.com/output/1485503

Files

Published Journal Article (19.9 Mb)
PDF

Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2010 The Authors. Journal compilation © 2010 RAS. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.






You might also like



Downloadable Citations