An Optimal Estimator of Intrinsic Alignments for Star-forming Galaxies in IllustrisTNG Simulation

@article{Shi2021AnOE,
title={An Optimal Estimator of Intrinsic Alignments for Star-forming Galaxies in IllustrisTNG Simulation},
author={Jingjing Shi and Ken Osato and Toshiki Kurita and Masahiro Takada},
journal={The Astrophysical Journal},
year={2021},
volume={917}
}
• Published 26 April 2021
• Physics
• The Astrophysical Journal
Emission line galaxies (ELGs), more generally star-forming galaxies, are valuable tracers of large-scale structure and therefore main targets of upcoming wide-area spectroscopic galaxy surveys. We propose a fixed-aperture shape estimator of each ELG for extracting the intrinsic alignment (IA) signal, and assess the performance of the method using image simulations of ELGs generated from the IllustrisTNG simulation including observational effects such as the sky background noise. We show that…
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Physical Review D
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Rank-2 tensor fields of large-scale structure, e.g. a tensor field inferred from shapes of galaxies, open up a window to directly access 2-scalar, 2-vector and 2-tensor modes, where the scalar fields
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• Physics
The Astrophysical Journal Letters
• 2021
We report the first evidence for intrinsic alignment (IA) of red galaxies at z > 1. We measure the gravitational shear-intrinsic ellipticity cross correlation function at z ∼ 1.3 using galaxy

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