Introduction
Those with ideas for future newsletter items should contact the LSST:UK Project Managers (George Beckett and Terry Sloan: lusc_pm@mlist.is.ed.ac.uk), while everyone is encouraged to subscribe to the Rubin Observatory Digest for more general news from the US observatory team.
The low-surface-brightness Universe: unlocking LSST’s extragalactic discovery space
The low-surface-brightness (LSB) Universe, defined as the domain that is undetectable in past wide-area surveys, represents the extra-galactic discovery space in LSST’s deep-wide images. LSB galaxies (which include all dwarf galaxies at cosmological distances and massive diffuse disks) dominate the galaxy number density. And LSB structures, such as intra-cluster light and merger-indued tidal features, offer strong constraints on our theoretical paradigm. However, while LSST’s unique combination of area and depth is capable of opening up the LSB Universe, its ability to do so depends on the preservation of LSB flux by the data processing pipeline. Developing precise sky subtraction algorithms that preserve LSB flux is key to enabling LSST’s extragalactic discovery space and the purpose of this project (WP 3.7).
DESC Tomographic Challenge
Merlin article
Recent LSST:UK outputs
LSST:UK has recently produced the following technical reports.
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