Extragalactic Stellar Tidal Streams in the Dark Energy Survey
Juan Miro-Carretero, David Martinez-Delgado, Maria A. Gomez-Flechoso,, Andrew Cooper, Mohammad Akhlaghi, Giuseppe Donatiello, Konrad Kuijken, Dmitry, Makarov, Seppo Laine, Santi Roca-Fabrega

TL;DR
This study systematically identifies and characterizes 63 stellar tidal streams around 700 nearby galaxies using DES data, providing insights into galaxy evolution and dark matter distribution.
Contribution
First large-scale survey of faint stellar tidal streams in the Local Universe, expanding the known sample and characterizing their properties and frequency.
Findings
Detected 63 streams, 59 new discoveries.
Stream detection frequency of 9.1%.
Average surface brightness measured across bands.
Abstract
Stellar tidal streams are a key tracer of galaxy evolution and have the potential to provide an indirect means for tracing dark matter. For the Local Group, many diffuse substructures have been identified and their link to galaxy evolution has been traced. However, an analysis of a larger sample is required to better probe the frequency and characteristics of these streams to verify the predictions of the Lambda-CDM model and its implementation in cosmological simulations. For that purpose, we are carrying out the first systematic survey of faint stellar debris from tidally disrupted dwarf satellites around nearby galaxies up to a distance of 100 Mpc. In this paper, we present a catalogue with the results of the first harvest of stellar tidal streams found by visual inspection in deep images of ~ 700 galaxies from the Dark Energy Survey (DES). We include a photometric characterisation…
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Gamma-ray bursts and supernovae
