STRRINGS: STReams in Residual Images of Nearby GalaxieS
E. Sola, D. Chemaly, V. Belokurov, O. M\"uller, A. Ardern-Arentsen, E. Y. Davies, J. Laguna-Miralles, G. Myeong, K. Panagiotakis, H. Zhang, D. Erkal, S. E. Koposov, D. Lang, J. Nibauer

TL;DR
This study identifies and characterizes stellar streams in nearby galaxies using residual imaging, providing a large sample for modeling and insights into galaxy assembly and dark matter halos.
Contribution
The paper introduces STRRINGS, a new catalog of stellar streams in nearby galaxies, with detailed measurements and analysis for the first time.
Findings
11.9% of galaxies host detectable tidal features
Stream properties correlate with galaxy mass and morphology
Median stream length is 124 kpc, longer than previous studies
Abstract
Tidal features from galaxy mergers, particularly stellar streams, offer valuable insights into galaxy assembly and dark matter halo properties. This paper aims to identify a large sample of nearby stellar streams suitable for detailed modelling and comparison with simulations to enable population-level constraints on halo properties. We visually inspect and compile a tidal feature catalogue for galaxies with redshift from the Siena Galaxy Atlas 2020 using original, model, and residual images from the DESI Legacy Imaging Surveys. Residual images, produced by subtracting models of all sources, enhance the detectability of faint asymmetries such as tidal features. We find that of galaxies host detectable tidal features, more frequently around early-type than late-type galaxies. The tidal feature fraction increases with stellar mass, from $2.4 \pm…
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