Zinger, Elad;
Joshi, Gandhali D;
Pillepich, Annalisa;
Rohr, Eric;
Nelson, Dylan;
(2023)
Jellyfish galaxies with the IllustrisTNG simulations – Citizen-science results towards large distances, low-mass hosts, and high redshifts.
Monthly Notices of the Royal Astronomical Society
, 527
(3)
pp. 8257-8289.
10.1093/mnras/stad3716.
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Abstract
We present the “Cosmological Jellyfish” project - a citizen-science classification program to identify jellyfish galaxies within the IllustrisTNG cosmological simulations. Jellyfish (JF) are satellite galaxies that exhibit long trailing gas features – ‘tails’ – extending from their stellar body. Their distinctive morphology arises due to ram-pressure stripping (RPS) as they move through the background gaseous medium. Using the TNG50 and TNG100 simulations, we construct a sample of ∼80, 000 satellite galaxies spanning an unprecedented range of stellar masses, $10^{8.3-12.3}\, \mathrm{M_\odot }$, and host masses, $M_\mathrm{200,c}=10^{10.4-14.6}\, \mathrm{M_\odot }$ back to z = 2. Based on this sample, ∼90, 000 galaxy images were presented to volunteers in the citizen-science Zooniverse platform, who were asked to determine whether the galaxy image resembles a jellyfish. Based on volunteer votes, each galaxy received a score determining if it is a JF or not. This paper describes the project, the inspected satellite sample, the methodology, and the classification process that resulted in a data-set of 5,307 visually-identified jellyfish galaxies. We find that JF are common in nearly all group- and cluster-sized systems, with the JF fraction increasing with host mass and decreasing with satellite stellar mass. We highlight JF galaxies in three relatively unexplored regimes: low-mass hosts of M200, c ∼ 1011.5 − 13 M⊙, radial positions within hosts exceeding the virial radius R200, c, and at high redshift up to z = 2. The full data-set of our jellyfish scores is publicly available and can be used to select and study JF galaxies in the IllustrisTNG simulations.
| Type: | Article |
|---|---|
| Title: | Jellyfish galaxies with the IllustrisTNG simulations – Citizen-science results towards large distances, low-mass hosts, and high redshifts |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stad3716 |
| Publisher version: | http://dx.doi.org/10.1093/mnras/stad3716 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third-party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Galaxies: evolution, galaxies: formation, galaxies: haloes |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS 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 |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10184477 |
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