Astrophys. J., 918, 88-88 (2021/September-2)
Resolved dwarf galaxy searches within ∼5 Mpc with the Vera Rubin Observatory and Subaru Hyper Suprime-Cam.
MUTLU-PAKDIL B., SAND D.J., CRNOJEVIC D., DRLICA-WAGNER A., CALDWELL N., GUHATHAKURTA P., SETH A.C., SIMON J.D., STRADER J. and TOLOBA E.
Abstract (from CDS):
We present a preview of the faint dwarf galaxy discoveries that will be possible with the Vera C. Rubin Observatory and Subaru Hyper Suprime-Cam in the next decade. In this work, we combine deep ground-based images from the Panoramic Imaging Survey of Centaurus and Sculptor and extensive image simulations to investigate the recovery of faint, resolved dwarf galaxies in the Local Volume with a matched-filter technique. We adopt three fiducial distances (1.5, 3.5, and 5 Mpc) and quantitatively evaluate the effects on dwarf detection of varied stellar backgrounds, ellipticity, and Milky Way foreground contamination and extinction. We show that our matched-filter method is powerful for identifying both compact and extended systems, and near-future surveys will be able to probe at least ∼4.5 mag below the tip of the red giant branch (TRGB) for a distance of up to 1.5 Mpc and ∼2 mag below the TRGB at 5 Mpc. This will push the discovery frontier for resolved dwarf galaxies to fainter magnitudes, lower surface brightnesses, and larger distances. Our simulations show the secure census of dwarf galaxies down to MV ≃ -5, -7, and -8 will soon be within reach, out to 1.5, 3.5, and 5 Mpc, respectively, allowing us to quantify the statistical fluctuations in satellite abundances around hosts and parse environmental effects as a function of host properties.
© 2021. The American Astronomical Society. All rights reserved.
Dwarf galaxies - Photometry - Galaxies - Cosmology - Local Group
View the references in ADS
To bookmark this query, right click on this link: simbad:2021ApJ...918...88M and select 'bookmark this link' or equivalent in the popup menu