Decomposition of distant galaxies with spiral arms

We perform the photometric decomposition, including spiral arms, of 159 galaxies at $0.1 \leq z \leq 3.3$ imaged by HST and JWST in optical and near-infrared in rest-frame. We measure various properties of spiral structure and, in particular, we confirm that pitch angles increase and azimuthal length decrease with increasing $z$, implying that spiral structure becomes more wound with time. We also measure band-shifting effects, or the spiral-to-total ratio and width relative to the disc exponential scale, and find that band-shifting effects can be as significant, or even stronger than, evolutionary effects. Furthermore, the spiral structure becomes more asymmetric at higher redshifts.

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Published
2024-12-27
DOI
https://doi.org/10.26119/vak2024.020
Primary Topic
Galaxies: Formation, Evolution, Phenomena
Type
article
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article

Decomposition of distant galaxies with spiral arms

Alexander A. Marchuk, Ilia V. Chugunov
Galaxies: Formation, Evolution, Phenomena
article

Decomposition of distant galaxies with spiral arms

Alexander A. Marchuk, Ilia V. Chugunov
article en

Abstract

We perform the photometric decomposition, including spiral arms, of 159 galaxies at $0.1 \leq z \leq 3.3$ imaged by HST and JWST in optical and near-infrared in rest-frame. We measure various properties of spiral structure and, in particular, we confirm that pitch angles increase and azimuthal length decrease with increasing $z$, implying that spiral structure becomes more wound with time. We also measure band-shifting effects, or the spiral-to-total ratio and width relative to the disc exponential scale, and find that band-shifting effects can be as significant, or even stronger than, evolutionary effects. Furthermore, the spiral structure becomes more asymmetric at higher redshifts.

St Petersburg University (RU), Pulkovo Observatory (RU)
Openalex Percentile: Top 82%
Galaxies: Formation, Evolution, Phenomena
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