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Abstract / Description of output
We develop a new Multi-Tracer Halo Occupation Distribution (MTHOD) framework for the galaxy distribution and apply it to the extended Baryon Oscillation Spectroscopic Survey (eBOSS) final data between z = 0:7 - 1:1. We obtain a best fit MTHOD for each tracer and describe the host halo properties of these galaxies. The mean halo masses for LRGs, ELGs and QSOs are found to be 1.9 x 1013 h-1M ο, 1.1 x 1012 h-1Mο and 5x1012 h-1Mο respectively in the eBOSS data. We use the MTHOD framework to create
mock galaxy catalogues and predict auto- and cross-correlation functions for all the tracers. Comparing these results with data, we investigate galactic conformity, the phenomenon whereby the properties of neighbouring galaxies are mutually correlated in a manner that is not captured by the basic halo model. We detect 1-halo conformity at more than 3σ statistical signifcance, while obtaining upper limits on 2-halo confor-mity. We also look at the environmental dependence of the galaxy quenching effciency and find that halo mass driven quenching successfully explains the behaviour in high density regions, but it fails to describe the quenching effciency in low density regions.
In particular, we show that the quenching effciency in low density filaments is higher in the observed data, as compared to the prediction of the MTHOD with halo mass driven quenching. The mock galaxy catalogue constructed in this paper is publicly available on this website.
mock galaxy catalogues and predict auto- and cross-correlation functions for all the tracers. Comparing these results with data, we investigate galactic conformity, the phenomenon whereby the properties of neighbouring galaxies are mutually correlated in a manner that is not captured by the basic halo model. We detect 1-halo conformity at more than 3σ statistical signifcance, while obtaining upper limits on 2-halo confor-mity. We also look at the environmental dependence of the galaxy quenching effciency and find that halo mass driven quenching successfully explains the behaviour in high density regions, but it fails to describe the quenching effciency in low density regions.
In particular, we show that the quenching effciency in low density filaments is higher in the observed data, as compared to the prediction of the MTHOD with halo mass driven quenching. The mock galaxy catalogue constructed in this paper is publicly available on this website.
Original language | English |
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Pages (from-to) | 581-595 |
Number of pages | 15 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 497 |
Issue number | 1 |
Early online date | 8 Jul 2020 |
DOIs | |
Publication status | Published - 1 Sept 2020 |
Keywords / Materials (for Non-textual outputs)
- astro-ph.CO
- astro-ph.GA
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- 1 Finished
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COSFORM: Cosmological Structure Formation in the Multiverse (034531/1)
1/10/15 → 30/09/21
Project: Research