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The One-hundred-deg^2 DECam Imaging in Narrowbands (ODIN): Survey Design and Science Goals

Authors :
Lee, Kyoung-Soo
Gawiser, Eric
Park, Changbom
Yang, Yujin
Valdes, Francisco
Lang, Dustin
Ramakrishnan, Vandana
Moon, Byeongha
Firestone, Nicole
Appleby, Stephen
Artale, Maria Celeste
Andrews, Moira
Bauer, Franz E.
Benda, Barbara
Broussard, Adam
Chiang, Yi-Kuan
Ciardullo, Robin
Dey, Arjun
Farooq, Rameen
Gronwall, Caryl
Guaita, Lucia
Huang, Yun
Hwang, Ho Seong
Im, Sanghyeok
Jeong, Woong-Seob
Karthikeyan, Shreya
Kim, Hwihyun
Kim, Seongjae
Nagaraj, Gautam
Nantais, Julie
Padilla, Nelson
Park, Jaehong
Pope, Alexandra
Popescu, Roxana
Schlegel, David J.
Seo, Eunsuk
Singh, Akriti
Song, Hyunmi
Troncoso, Paulina
Vivas, A. Katherina
Zabludoff, Ann
Zenteno, Alfredo
Publication Year :
2023

Abstract

We describe the survey design and science goals for ODIN (One-hundred-deg^2 DECam Imaging in Narrowbands), a NOIRLab survey using the Dark Energy Camera (DECam) to obtain deep (AB~25.7) narrow-band images over an unprecedented area of sky. The three custom-built narrow-band filters, N419, N501, and N673, have central wavelengths of 419, 501, and 673 nm and respective full-widthat-half-maxima of 7.2, 7.4, and 9.8 nm, corresponding to Lya at z=2.4, 3.1, and 4.5 and cosmic times of 2.8, 2.1, and 1.4 Gyr, respectively. When combined with even deeper, public broad-band data from Hyper Suprime-Cam, DECam, and in the future, LSST, the ODIN narrow-band images will enable the selection of over 100,000 Lya-emitting (LAE) galaxies at these epochs. ODIN-selected LAEs will identify protoclusters as galaxy overdensities, and the deep narrow-band images enable detection of highly extended Lya blobs (LABs). Primary science goals include measuring the clustering strength and dark matter halo connection of LAEs, LABs, and protoclusters, and their respective relationship to filaments in the cosmic web. The three epochs allow the redshift evolution of these properties to be determined during the period known as Cosmic Noon, where star formation was at its peak. The two narrow-band filter wavelengths are designed to enable interloper rejection and further scientific studies by revealing [O II] and [O III] at z=0.34, Lya and He II 1640 at z=3.1, and Lyman continuum plus Lya at z=4.5. Ancillary science includes similar studies of the lower-redshift emission-line galaxy samples and investigations of nearby star-forming galaxies resolved into numerous [O III] and [S II] emitting regions.<br />Comment: 21 pages, 8 figures, submitted to Astrophysical Journal

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2309.10191
Document Type :
Working Paper