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

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

arXiv · 2309.10191

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

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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.

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Kyoung-Soo Lee, Eric Gawiser, Changbom Park, Yujin Yang, Francisco Valdes, Dustin Lang, Vandana Ramakrishnan, Byeongha Moon, Nicole Firestone, Stephen Appleby, Maria Celeste Artale, Moira Andrews, Franz E. Bauer, Barbara Benda, Adam Broussard, Yi-Kuan Chiang, Robin Ciardullo, Arjun Dey, Rameen Farooq, Caryl Gronwall, Lucia Guaita, Yun Huang, Ho Seong Hwang, Sanghyeok Im, Woong-Seob Jeong, Shreya Karthikeyan, Hwihyun Kim, Seongjae Kim, Gautam Nagaraj, Julie Nantais, Nelson Padilla, Jaehong Park, Alexandra Pope, Roxana Popescu, David J. Schlegel, Eunsuk Seo, Akriti Singh, Hyunmi Song, Paulina Troncoso, A. Katherina Vivas, Ann Zabludoff, Alfredo Zenteno. 2023-09-18. The One-hundred-deg^2 DECam Imaging in Narrowbands (ODIN): Survey Design and Science Goals. https://arxiv.org/abs/2309.10191

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