ALMA-JELLY II. Constraining the radial profiles of the quenching timescales in ram-pressure-stripped galaxies
Abstract
We investigate the environmental quenching histories and spatial progression of ram-pressure stripping in 11 galaxies in the nearby Coma, Norma, and A1367 clusters. As part of the ALMA-JELLY large program, we combine high-sensitivity VLT/MUSE integral-field spectroscopy with ultraviolet-to-far-infrared photometry in 37 spatially resolved disc apertures. The sample spans log(M*/M⊙)∼7.5−10.5 and includes galaxies undergoing active or recent ram-pressure stripping, identified through prominent Hα or UV tails. We use Bayesian spectrophotometric modelling with exponentially declining star-formation histories and show with mock data that combining spectra and photometry breaks parameter degeneracies and improves quenching-age constraints. All galaxies show quenched outer discs and relatively old (≲1 Gyr) stellar populations. Massive galaxies (log(M*/M⊙)>9.5) exhibit clear outside-in quenching: inner regions quench about 500 Myr later than their outskirts. The small scatter in quenching age with distance from the truncation radius, despite differences in environment and stripping geometry, points to a common evolutionary sequence. Low-mass and dwarf galaxies instead show weak radial gradients, with quenching occurring more rapidly, typically within 300 Myr.
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BibTeX
@misc{infurna2026almajelly,
title = {{ALMA-JELLY II. Constraining the radial profiles of the quenching timescales in ram-pressure-stripped galaxies}},
author = {Roberto P. Infurna and Matteo Fossati and Alessandro Boselli and Michele Fumagalli and Jeffrey D. P. Kenney and Pavel Jáchym and Ming Sun and Elias Brinks and Françoise Combes and Patricia da Silva and Romana Grossová and Stephen Gwyn and Kokoro Hosogi and Alessandro Ignesti and Jin Koda and Jan Palouš and Nathanael Pichette and Sujith Ranasinghe and Tom C. Scott and Harrison J. Souchereau and Juhi Tiwari and Bernd Vollmer and Norbert Werner and Masafumi Yagi},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.15535},
eprint = {2609.15535},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.15535},
}
RIS
TY - UNPB
TI - ALMA-JELLY II. Constraining the radial profiles of the quenching timescales in ram-pressure-stripped galaxies
AU - Roberto P. Infurna
AU - Matteo Fossati
AU - Alessandro Boselli
AU - Michele Fumagalli
AU - Jeffrey D. P. Kenney
AU - Pavel Jáchym
AU - Ming Sun
AU - Elias Brinks
AU - Françoise Combes
AU - Patricia da Silva
AU - Romana Grossová
AU - Stephen Gwyn
AU - Kokoro Hosogi
AU - Alessandro Ignesti
AU - Jin Koda
AU - Jan Palouš
AU - Nathanael Pichette
AU - Sujith Ranasinghe
AU - Tom C. Scott
AU - Harrison J. Souchereau
AU - Juhi Tiwari
AU - Bernd Vollmer
AU - Norbert Werner
AU - Masafumi Yagi
PY - 2026
DA - 2026/09/14
PB - arXiv
DO - 10.48550/arxiv.2609.15535
UR - https://arxiv.org/abs/2609.15535
AB - We investigate the environmental quenching histories and spatial progression of ram-pressure stripping in 11 galaxies in the nearby Coma, Norma, and A1367 clusters. As part of the ALMA-JELLY large program, we combine high-sensitivity VLT/MUSE integral-field spectroscopy with ultraviolet-to-far-infrared photometry in 37 spatially resolved disc apertures. The sample spans log(M_*/M⊙)∼7.5−10.5 and includes galaxies undergoing active or recent ram-pressure stripping, identified through prominent Hα or UV tails. We use Bayesian spectrophotometric modelling with exponentially declining star-formation histories and show with mock data that combining spectra and photometry breaks parameter degeneracies and improves quenching-age constraints. All galaxies show quenched outer discs and relatively old (≲1 Gyr) stellar populations. Massive galaxies (log(M_*/M_⊙)>9.5) exhibit clear outside-in quenching: inner regions quench about 500 Myr later than their outskirts. The small scatter in quenching age with distance from the truncation radius, despite differences in environment and stripping geometry, points to a common evolutionary sequence. Low-mass and dwarf galaxies instead show weak radial gradients, with quenching occurring more rapidly, typically within 300 Myr.
ER -