DESI Survey Validation Data in the COSMOS/Hyper Suprime-Cam Field: Cool Gas Trace Main-sequence Star-forming Galaxies at the Cosmic Noon

Zou, Siwei; Jiang, Linhua; Cai, Zheng; Moustakas, John; Sun, Zechang; Pan, Zhiwei; Ding, Jiani; Forero-Romero, Jaime E.; Zou, Hu; Ting, Yuan-sen; Pieri, Matthew; Ahlen, Steven; Alexander, David; Brooks, David; Dey, Arjun; Font-Ribera, Andreu; Gontcho A. Gontcho, Satya; Honscheid, Klaus; Landriau, Martin; de la Macorra, Axel; Vargas Magana, Mariana; Meisner, Aaron; Miquel, Ramon; Schubnell, Michael; Tarlé, Gregory; Zhou, Zhimin

Abstract

We present the first result in exploring the gaseous halo and galaxy correlation using the Dark Energy Spectroscopic Instrument survey validation data in the Cosmic Evolution Survey (COSMOS) and Hyper Suprime-Cam field. We obtain multiphase gaseous halo properties in the circumgalactic medium by using 115 quasar spectra (signal-to-noise ratio > 3). We detect Mg ii absorption at redshift 0.6 < z < 2.5, C iv absorption at 1.6 < z < 3.6, and H i absorption associated with the Mg ii and C iv. By crossmatching the COSMOS2020 catalog, we identify the Mg ii and C iv host galaxies in 10 quasar fields at 0.9< z < 3.1. We find that within the impact parameter of 250 kpc, a tight correlation is seen between the strong Mg ii equivalent width and the host galaxy star formation rate. The covering fraction f c of the strong Mg ii selected galaxies, which is the ratio of the absorbing galaxy in a certain galaxy population, shows significant evolution in the main-sequence galaxies and marginal evolution in all the galaxy populations within 250 kpc at 0.9 < z < 2.2. The f c increase in the main-sequence galaxies likely suggests the coevolution of strong Mg ii absorbing gas and the main-sequence galaxies at the cosmic noon. Furthermore, Mg ii and C iv absorbing gas is detected out of the galaxy virial radius, tentatively indicating the feedback produced by the star formation and/or the environmental effects.

Citation

Zou, S., Jiang, L., Cai, Z., Moustakas, J., Sun, Z., Pan, Z., …Zhou, Z. (2024). DESI Survey Validation Data in the COSMOS/Hyper Suprime-Cam Field: Cool Gas Trace Main-sequence Star-forming Galaxies at the Cosmic Noon. Astrophysical Journal, 960(1), Article 34. https://doi.org/10.3847/1538-4357/ad09b2

• Journal Article Type: Article
• Acceptance Date: Nov 3, 2023
• Online Publication Date: Dec 20, 2023
• Publication Date: Jan 1, 2024
• Deposit Date: Jan 2, 2024
• Publicly Available Date: Jan 2, 2024
• Journal: The Astrophysical Journal
• Print ISSN: 0004-637X
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 960
• Issue: 1
• Article Number: 34
• DOI: https://doi.org/10.3847/1538-4357/ad09b2
• Keywords: Circumgalactic medium, Quasar absorption line spectroscopy, Galaxy environments, Star formation
• Public URL: https://durham-repository.worktribe.com/output/2050150