Discovery of a red backsplash galaxy candidate near M81
Kirsten J. Casey, Johnny P. Greco, Annika H. G. Peter, A. Bianca Davis

TL;DR
This paper reports the discovery of a low-mass quenched galaxy near M81, using surface brightness fluctuations to suggest it is a backsplash galaxy influenced by the M81 group, offering insights into galaxy quenching processes.
Contribution
The discovery of a new low-mass quenched galaxy candidate near M81 and the use of SBF to determine its likely backsplash status.
Findings
The galaxy is approximately 3.21 Mpc away, likely outside the M81 group.
It has a stellar mass of about 10^7 solar masses.
It is a quenched galaxy possibly affected by environmental interactions.
Abstract
Understanding quenching mechanisms in low-mass galaxies is essential for understanding galaxy evolution overall. In particular, isolated galaxies are important tools to help disentangle the complex internal and external processes that impact star formation. Comparisons between quenched field and satellite galaxies in the low mass regime offer a substantial opportunity for discovery, although very few quenched galaxies with masses below are known outside the virial radius, , of any host halo. Importantly, simulations and observations suggest that an in-between population of backsplash galaxies also exists that may complement interpretations of environmental quenching. Backsplash galaxies -- like field galaxies -- reside outside the virial radius of a host halo, but their star formation can be deeply impacted by previous interactions with more…
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Taxonomy
TopicsGalaxies: Formation, Evolution, Phenomena · Spectroscopy and Laser Applications
