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Program Information for 2020B-0201


PI: Kyoung-Soo Lee, Purdue U., soolee@purdue.edu
Address: 525 Northwestern Ave, West Lafayette, Indiana 47907-2036 United States

CoI: Eric Gawiser (Co-Pi), Rutgers U.
CoI: Changbom Park, Korea Institute for Advanced Study
CoI: Robin Ciardullo, Pennsylvania State U.
CoI: Yi-Kuan Chiang, Ohio State U.
CoI: Arjun Dey, NOIRLab
CoI: Steven Finkelstein, U. of Texas, Austin
CoI: Stephen Appleby, Korea Institute for Advanced Study
CoI: Jenny Greene, Princeton U.
CoI: Caryl Gronwall, Pennsylvania State U.
CoI: Sungryong Hong, KASI
CoI: Ho Seong Hwang, KASI
CoI: Woong-Seob Jeong, KASI
CoI: Hwihyun Kim, NOIRLab
CoI: Dustin Lang, Perimeter Institute
CoI: Alexie Leauthaud, UC Santa Cruz
CoI: John Moustakas, Siena College
CoI: David J Schlegel, LBNL
CoI: Alex Pope, U. Mass
CoI: Hyunmi Song, Yonsei University, Republic of Korea
CoI: Frank Valdes, NOIRLab
CoI: Yujin Yang, KASI
CoI: Humna Awan, Rutgers U.
CoI: Adam Broussard, Rutgers U.
CoI: V Ramakrishnan, Purdue U.
CoI: Yun Huang, Purdue U.

Title: A 100 Deg^2 DECam Narrow-band Survey for the LSST Era: Tracing the Largest Cosmic Structures in the Distant Universe

Abstract: In the distant universe, redshifted Ly$alpha$ emission provides a unique view into the large-scale structures of the universe and the nascent galaxies that trace them. In the new era of deep wide-field imaging ushered in by the Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST), one crucial application of Ly$alpha$ mapping will be its unique capability to identify the rarest massive cosmic structures, or `protoclusters'; these systems will evolve into present- day galaxy clusters. We propose a DECam survey to image an unprecedented volume (91~deg$^2$ to AB$sim) with three custom narrow- band filters to sample Ly$alpha$ emission at $zsim2.4$, 3.1, and 4.5, straddling the crucial epoch in which the mass assembly in cluster galaxies reached its peak. In conjunction with deep public broad-band imaging, we will i) conduct a search for protoclusters; ii) identify a large number of rare extended Ly$alpha$ nebulae and study their relationship with the large-scale structure; and iii) determine the masses of halos hosting Ly$alpha$-emitting galaxies as a function of their physical properties through angular clustering measurements. In addition to the immediate scientific return, the proposed data will have a lasting legacy value well beyond 2023 when LSST begins %its operation and generates even deeper broad-band data and coordinated follow-up spectroscopy. Significant additional science will result from synergy with DESI, HETDEX, Euclid, SPHEREx, WFIRST, and JWST.

Program Type: Survey

Scheduled Nights:
Run 1 (2021A):  CT-4m/DECam -- 8n on Feb 07 - Feb 14 2021
Run 1 (2021B):  CT-4m/DECam -- 15.5n on Sep 29 - Sep 30 2021, Oct 02 - Oct 03 2021, Oct 05 - Oct 06 2021, Oct 08 - Oct 15 2021, Oct 28 - Nov 03 2021


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2020B-0201

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