Building Clean Galaxy Samples From SDSS: An Assessment of Galaxy Selection
Abstract
We present an assessment of querying galaxy samples through the Sloan Digital Sky Survey database. We performed SQL queries on 26 galaxy cluster fields, which consist of a total of 7437 galaxies. A thorough visual inspection of the samples revealed the inclusion of artifacts, stars, or quasars in our sample. Moreover, there are galaxies that are not reliable in terms of photometry, and such galaxies are included in samples even when queried with the Clean Photometry procedure. In this work, we investigated several SDSS photometry tags and proposed a modified SQL query to obtain more reliable galaxy samples, at least for studies concerning cluster member galaxies. The newly proposed query in this work recovers 338 galaxies that were originally excluded by Clean Photometry and removes an additional 156 objects that are either not real galaxies or not photometrically reliable.
Keywords
Supporting Institution
Thanks
References
- Abazajian K., et al., 2003, AJ (doi:10.1086/378165), 126, 2081
- Abazajian K. N., et al., 2009, ApJS (doi:10.1088/0067-0049/182/2/543), 182, 543
- Abdurro'uf et al., 2022, ApJS (doi:10.3847/1538-4365/ac4414), 259, 35
- Ahumada R., et al., 2020, ApJS (doi:10.3847/1538-4365/ab929e), 249, 3
- Aliş S., 2024, Journal of Advanced Research in Natural and Applied Sciences (doi:10.28979/jarnas.1562591), 10, 954
- Barrena R., Girardi M., Boschin W., 2013, MNRAS (doi:10.1093/mnras/stt144), 430, 3453
- Brescia M., Cavuoti S., Longo G., 2015, MNRAS (doi:10.1093/mnras/stv854), 450, 3893
- Coupon J., Czakon N., Bosch J., Komiyama Y., Medezinski E., Miyazaki S., Oguri M., 2018, PASJ (doi:10.1093/pasj/psx047), 70, S7
Details
Primary Language
English
Subjects
Cosmology and Extragalactic Astronomy
Journal Section
Research Article
Publication Date
April 9, 2026
Submission Date
January 22, 2026
Acceptance Date
January 29, 2026
Published in Issue
Year 2026 Volume: 7