Searching for Green Pea Galaxies in the SFACT Survey
- 1Indiana University
- 2NorthWest Arkansas Community College
- 3University of Texas
Abstract
Green Pea galaxies (GPs) are a class of rare, extreme star-forming galaxies whose physical properties closely resemble high-redshift Lyman continuum-emitting galaxies. Their high equivalent width [O iii ] emission lines make them readily identifiable in surveys of emission-line galaxies like the ongoing deep, narrowband Star Formation Across Cosmic Time (SFACT) survey. In this study, we use broadband gri colors and [O iii ] equivalent widths derived from narrowband images to select a new sample of ∼120 GP candidates from a catalog of [O iii ]-detected galaxies identified in the SFACT survey. All SFACT GP candidates have spectroscopically confirmed redshifts in the range z = 0.31–0.51. The median apparent magnitude of our sample is g = 22.9. We compare the properties of our GP candidate sample to other samples of known GPs. We find that the excellent depth of SFACT allows us to detect GP candidates to lower luminosities than these comparison samples. This is the first catalog of SFACT GP candidates; additional candidates will be added as the spectroscopic follow-up of the SFACT survey is completed.
Versions
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BibTeX
@article{baker2026searching,
title = {{Searching for Green Pea Galaxies in the SFACT Survey}},
author = {Kristin N. Baker and John J. Salzer and Brooke Kimsey-Miller and Samantha W. Brunker and David J. Carr and Jennifer Sieben and Steven Janowiecki and Samir Salim},
journal = {The Astrophysical Journal Supplement Series},
year = {2026},
month = oct,
doi = {10.3847/1538-4365/aea97c},
url = {https://iopscience.iop.org/article/10.3847/1538-4365/aea97c},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Searching for Green Pea Galaxies in the SFACT Survey
AU - Kristin N. Baker
AU - John J. Salzer
AU - Brooke Kimsey-Miller
AU - Samantha W. Brunker
AU - David J. Carr
AU - Jennifer Sieben
AU - Steven Janowiecki
AU - Samir Salim
PY - 2026
DA - 2026/10/12
JO - The Astrophysical Journal Supplement Series
DO - 10.3847/1538-4365/aea97c
UR - https://iopscience.iop.org/article/10.3847/1538-4365/aea97c
AB - Green Pea galaxies (GPs) are a class of rare, extreme star-forming galaxies whose physical properties closely resemble high-redshift Lyman continuum-emitting galaxies. Their high equivalent width [O iii ] emission lines make them readily identifiable in surveys of emission-line galaxies like the ongoing deep, narrowband Star Formation Across Cosmic Time (SFACT) survey. In this study, we use broadband gri colors and [O iii ] equivalent widths derived from narrowband images to select a new sample of ∼120 GP candidates from a catalog of [O iii ]-detected galaxies identified in the SFACT survey. All SFACT GP candidates have spectroscopically confirmed redshifts in the range z = 0.31–0.51. The median apparent magnitude of our sample is g = 22.9. We compare the properties of our GP candidate sample to other samples of known GPs. We find that the excellent depth of SFACT allows us to detect GP candidates to lower luminosities than these comparison samples. This is the first catalog of SFACT GP candidates; additional candidates will be added as the spectroscopic follow-up of the SFACT survey is completed.
SN - 0067-0049
SN - 1538-4365
ER -