TY - JOUR
T1 - A Sample of Nearby Isolated Dwarf Galaxies
T2 - A First Look at the Mass Function of Field Dwarfs
AU - Carlsten, Scott G.
AU - Li, Jiaxuan
AU - Greene, Jenny E.
AU - Drlica-Wagner, Alex
AU - Danieli, Shany
N1 - Publisher Copyright:
© 2026. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
PY - 2026/4/20
Y1 - 2026/4/20
N2 - We present the results of the Exploration of Local VolumE Survey-Field, a survey of the dwarf galaxies in the Local Volume (LV; D < 10 Mpc) over roughly 3000 deg2, focusing on the field dwarf population. Candidates are detected using a semiautomated algorithm tailored for low-surface brightness dwarfs. Using tests with injected galaxies, we show the detection is 50% complete to mg ∼ 20 mag and M⋆ ∼ 106M⊙. Candidates are confirmed to be true nearby dwarfs through distance measurements including redshift, tip of the red giant branch, and surface brightness fluctuations. We identify isolated field dwarfs using various environmental criteria. Over the survey footprint, we detect and confirm 95 LV dwarfs, 44 of which we consider isolated. Using this sample, we infer the field dwarf mass function and find good agreement at the high-mass end with previous redshift surveys and with the predictions of the Illustris-TNG simulation. This sample of isolated field dwarfs represents a powerful dataset to investigate aspects of small-scale structure and the effect of environment on dwarf galaxy evolution.
AB - We present the results of the Exploration of Local VolumE Survey-Field, a survey of the dwarf galaxies in the Local Volume (LV; D < 10 Mpc) over roughly 3000 deg2, focusing on the field dwarf population. Candidates are detected using a semiautomated algorithm tailored for low-surface brightness dwarfs. Using tests with injected galaxies, we show the detection is 50% complete to mg ∼ 20 mag and M⋆ ∼ 106M⊙. Candidates are confirmed to be true nearby dwarfs through distance measurements including redshift, tip of the red giant branch, and surface brightness fluctuations. We identify isolated field dwarfs using various environmental criteria. Over the survey footprint, we detect and confirm 95 LV dwarfs, 44 of which we consider isolated. Using this sample, we infer the field dwarf mass function and find good agreement at the high-mass end with previous redshift surveys and with the predictions of the Illustris-TNG simulation. This sample of isolated field dwarfs represents a powerful dataset to investigate aspects of small-scale structure and the effect of environment on dwarf galaxy evolution.
KW - Dwarf galaxies (416)
KW - Field galaxies (533)
KW - Low surface brightness galaxies (940)
UR - https://www.scopus.com/pages/publications/105037523459
U2 - 10.3847/1538-4357/ae4c5c
DO - 10.3847/1538-4357/ae4c5c
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AN - SCOPUS:105037523459
SN - 0004-637X
VL - 1001
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
ER -