Maximizing the scientific return of Roman and Rubin with a joint wide-sky observing strategy
arxiv(2024)
摘要
This work presents the case for a single-band LSST-matched depth Roman
Community Survey over the footprint of the Vera C. Rubin Observatory Legacy
Survey of Space and Time (LSST) Wide-Fast-Deep to enhance the key science
programs of both missions. We propose to observe the 18K sq deg LSST
Wide-Fast-Deep footprint in the F146 filter to mAB 25; this will take
approximately 5 months of Roman observing time. The combination of the
multiwavelength nature of LSST and angular resolution of Roman would lead to
enhanced scientific returns for both the Roman and LSST surveys. Galaxy
deblending and crowded field photometry will be significantly improved. The
extension of Rubin LSST six-band optical photometry to IR wavelengths would
improve photometric redshift (photo-z) estimation, leading to improved
cosmological parameter estimation, penetrate interstellar dust in the Galactic
plane, improve differential chromatic refraction derived Spectral Energy
Distributions, maximize galaxy-star separation and minimize crowding confusion
through improved angular resolution. Conversely, the LSST survey will provide a
time-domain extension of the Roman survey on the shared footprint and 6-band
optical photometry with sensitivity extending all the way to ultraviolet
wavelengths.
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