Zhang, Hanyu;
Samushia, Lado;
Brooks, David;
de la Macorra, Axel;
Doel, Peter;
Gaztanaga, Enrique;
Gontcho, Satya Gontcho A;
... Zou, Hu; + view all
(2022)
Constraining galaxy-halo connection with high-order statistics.
Monthly Notices of the Royal Astronomical Society
, 515
(4)
pp. 6133-6150.
10.1093/mnras/stac2147.
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Abstract
We investigate using three-point statistics in constraining the galaxy–halo connection. We show that for some galaxy samples, the constraints on the halo occupation distribution parameters are dominated by the three-point function signal (over its two-point counterpart). We demonstrate this on mock catalogues corresponding to the Luminous red galaxies (LRGs), Emission-line galaxies (ELGs), and quasars (QSOs) targeted by the Dark Energy Spectroscopic Instrument (DESI) Survey. The projected three-point function for triangle sides less up to 20 h−1 Mpc measured from a cubic Gpc of data can constrain the characteristic minimum mass of the LRGs with a preci sion of 0.46 per cent. For comparison, similar constraints from the projected two-point function are 1.55 per cent. The improvements for the ELGs and QSOs targets are more modest. In the case of the QSOs, it is caused by the high shot-noise of the sample, and in the case of the ELGs, it is caused by the range of halo masses of the host haloes. The most time-consuming part of our pipeline is the measurement of the three-point functions. We adopt a tabulation method, proposed in earlier works for the two-point function, to significantly reduce the required compute time for the three-point analysis.
| Type: | Article |
|---|---|
| Title: | Constraining galaxy-halo connection with high-order statistics |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stac2147 |
| Publisher version: | https://doi.org/10.1093/mnras/stac2147 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | cosmology: theory, galaxies: haloes, large-scale structure of Universe |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10155515 |
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