dc.contributor.author | Wolz, Laura | |
dc.contributor.author | Pourtsidou, Alkistis | |
dc.contributor.author | Masui, Kiyoshi W | |
dc.contributor.author | Chang, Tzu-Ching | |
dc.contributor.author | Bautista, Julian E | |
dc.contributor.author | Müller, Eva-Maria | |
dc.contributor.author | Avila, Santiago | |
dc.contributor.author | Bacon, David | |
dc.contributor.author | Percival, Will J | |
dc.contributor.author | Cunnington, Steven | |
dc.contributor.author | Anderson, Chris | |
dc.contributor.author | Chen, Xuelei | |
dc.contributor.author | Kneib, Jean-Paul | |
dc.contributor.author | Li, Yi-Chao | |
dc.contributor.author | Liao, Yu-Wei | |
dc.contributor.author | Pen, Ue-Li | |
dc.contributor.author | Peterson, Jeffrey B | |
dc.contributor.author | Rossi, Graziano | |
dc.contributor.author | Schneider, Donald P | |
dc.contributor.author | Yadav, Jaswant | |
dc.contributor.author | Zhao, Gong-Bo | |
dc.date.accessioned | 2022-04-27T18:03:26Z | |
dc.date.available | 2022-04-27T18:03:26Z | |
dc.date.issued | 2022 | |
dc.identifier.uri | https://hdl.handle.net/1721.1/142156 | |
dc.description.abstract | <jats:title>ABSTRACT</jats:title>
<jats:p>We present the joint analysis of Neutral Hydrogen (H i) Intensity Mapping observations with three galaxy samples: the Luminous Red Galaxy (LRG) and Emission Line Galaxy (ELG) samples from the eBOSS survey, and the WiggleZ Dark Energy Survey sample. The H i intensity maps are Green Bank Telescope observations of the redshifted $21\rm cm$ emission on $100 \, {\rm deg}^2$ covering the redshift range 0.6 &lt; z &lt; 1.0. We process the data by separating and removing the foregrounds present in the radio frequencies with FastI ICA. We verify the quality of the foreground separation with mock realizations, and construct a transfer function to correct for the effects of foreground removal on the H i signal. We cross-correlate the cleaned H i data with the galaxy samples and study the overall amplitude as well as the scale dependence of the power spectrum. We also qualitatively compare our findings with the predictions by a semianalytical galaxy evolution simulation. The cross-correlations constrain the quantity $\Omega _{\rm {H\,\small {I}}} b_{\rm {H\,\small {I}}} r_{\rm {H\,\small {I}},{\rm opt}}$ at an effective scale keff, where $\Omega _\rm {H\,\small {I}}$ is the H i density fraction, $b_\rm {H\,\small {I}}$ is the H i bias, and $r_{\rm {H\,\small {I}},{\rm opt}}$ the galaxy–hydrogen correlation coefficient, which is dependent on the H i content of the optical galaxy sample. At $k_{\rm eff}=0.31 \, h\,{\rm Mpc^{-1}}$ we find $\Omega _{\rm {H\,\small {I}}} b_{\rm {H\,\small {I}}} r_{\rm {H\,\small {I}},{\rm Wig}} = [0.58 \pm 0.09 \, {\rm (stat) \pm 0.05 \, {\rm (sys)}}] \times 10^{-3}$ for GBT-WiggleZ, $\Omega _{\rm {H\,\small {I}}} b_{\rm {H\,\small {I}}} r_{\rm {H\,\small {I}},{\rm ELG}} = [0.40 \pm 0.09 \, {\rm (stat) \pm 0.04 \, {\rm (sys)}}] \times 10^{-3}$ for GBT-ELG, and $\Omega _{\rm {H\,\small {I}}} b_{\rm {H\,\small {I}}} r_{\rm {H\,\small {I}},{\rm LRG}} = [0.35 \pm 0.08 \, {\rm (stat) \pm 0.03 \, {\rm (sys)}}] \times 10^{-3}$ for GBT-LRG, at z ≃ 0.8. We also report results at $k_{\rm eff}=0.24$ and $k_{\rm eff}=0.48 \, h\,{\rm Mpc^{-1}}$. With little information on H i parameters beyond our local Universe, these are amongst the most precise constraints on neutral hydrogen density fluctuations in an underexplored redshift range.</jats:p> | en_US |
dc.language.iso | en | |
dc.publisher | Oxford University Press (OUP) | en_US |
dc.relation.isversionof | 10.1093/MNRAS/STAB3621 | en_US |
dc.rights | Creative Commons Attribution-Noncommercial-Share Alike | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/ | en_US |
dc.source | arXiv | en_US |
dc.title | H i constraints from the cross-correlation of eBOSS galaxies and Green Bank Telescope intensity maps | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Wolz, Laura, Pourtsidou, Alkistis, Masui, Kiyoshi W, Chang, Tzu-Ching, Bautista, Julian E et al. 2022. "H i constraints from the cross-correlation of eBOSS galaxies and Green Bank Telescope intensity maps." Monthly Notices of the Royal Astronomical Society, 510 (3). | |
dc.contributor.department | MIT Kavli Institute for Astrophysics and Space Research | |
dc.contributor.department | Massachusetts Institute of Technology. Department of Physics | |
dc.relation.journal | Monthly Notices of the Royal Astronomical Society | en_US |
dc.eprint.version | Author's final manuscript | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dc.date.updated | 2022-04-27T17:54:53Z | |
dspace.orderedauthors | Wolz, L; Pourtsidou, A; Masui, KW; Chang, T-C; Bautista, JE; Müller, E-M; Avila, S; Bacon, D; Percival, WJ; Cunnington, S; Anderson, C; Chen, X; Kneib, J-P; Li, Y-C; Liao, Y-W; Pen, U-L; Peterson, JB; Rossi, G; Schneider, DP; Yadav, J; Zhao, G-B | en_US |
dspace.date.submission | 2022-04-27T17:54:55Z | |
mit.journal.volume | 510 | en_US |
mit.journal.issue | 3 | en_US |
mit.license | OPEN_ACCESS_POLICY | |
mit.metadata.status | Authority Work and Publication Information Needed | en_US |