Value-added catalog of physical properties for more than 1.3 million galaxies from the DESI survey

Siudek, M.; Pucha, R.; Mezcua, M.; Juneau, S.; Aguilar, J.; Ahlen, S.; Brooks, D.; Circosta, C.; Claybaugh, T.; Cole, S.; Dawson, K.; de la Macorra, A.; Dey, A.; Dey, B.; Doel, P.; Font-Ribera, A.; Forero-Romero, J. E.; Gaztañaga, E.; Gontcho A Gontcho, S.; Gutierrez, G.; Honscheid, K.; Howlett, C.; Ishak, M.; Kehoe, R.; Kirkby, D.; Kisner, T.; Kremin, A.; Lambert, A.; Landriau, M.; Le Guillou, L.; Manera, M.; Martini, P.; Meisner, A.; Miquel, R.; Moustakas, J.; Newman, J. A.; Niz, G.; Pan, Z.; Percival, W. J.; Poppett, C.; Prada, F.; Rossi, G.; Saintonge, A.; Sanchez, E.; Schlegel, D.; Scholte, D.; Schubnell, M.; Seo, H.; Speranza, F.; Sprayberry, D.; Tarlé, G.; Weaver, B. A.; Zou, H.

Abstract

Aims. We present an extensive catalog of the physical properties of more than a million galaxies investigated with the Dark Energy Spectroscopic Instrument (DESI), one of the largest spectroscopic surveys to date. Spanning a full range of target types, including emission-line galaxies, luminous red galaxies, and quasars, our survey encompasses an unprecedented range of spectroscopic redshifts, all the way from 0 to 6.

Methods. The physical properties, such as stellar masses and star formation rates, were derived via the CIGALE spectral energy distribution (SED) fitting code accounting for the contribution coming from active galactic nuclei (AGNs). Based on the modeling of the optical-mid-infrared (grz supplemented with WISE photometry) SEDs, we studied the galaxy properties with respect to their location on the main sequence.

Results. We have revised the dependence of stellar mass estimates on model choices and on the availability of WISE photometry. Indeed, the WISE data are required to minimize the misclassification of star-forming galaxies as AGNs. The lack of WISE bands in SED fits leads to elevated AGN fractions for 68% of star-forming galaxies identified using emission line diagnostic diagrams, but this does not significantly affect their stellar mass or star formation estimates.

Citation

Siudek, M., Pucha, R., Mezcua, M., Juneau, S., Aguilar, J., Ahlen, S., Brooks, D., Circosta, C., Claybaugh, T., Cole, S., Dawson, K., de la Macorra, A., Dey, A., Dey, B., Doel, P., Font-Ribera, A., Forero-Romero, J. E., Gaztañaga, E., Gontcho A Gontcho, S., Gutierrez, G., …Zou, H. (2024). Value-added catalog of physical properties for more than 1.3 million galaxies from the DESI survey. Astronomy & Astrophysics, 691, Article A308. https://doi.org/10.1051/0004-6361/202451761

• Journal Article Type: Article
• Acceptance Date: Oct 1, 2024
• Online Publication Date: Nov 25, 2024
• Publication Date: 2024-11
• Deposit Date: Jan 16, 2025
• Publicly Available Date: Jan 16, 2025
• Journal: Astronomy & Astrophysics
• Print ISSN: 0004-6361
• Electronic ISSN: 1432-0746
• Publisher: EDP Sciences
• Peer Reviewed: Peer Reviewed
• Volume: 691
• Article Number: A308
• DOI: https://doi.org/10.1051/0004-6361/202451761
• Public URL: https://durham-repository.worktribe.com/output/3337018