Deeper than DEEP: a spectroscopic survey of z > 3 Ly α emitters in the Extended Groth Strip

Author:

Stawinski Stephanie M Urbano1ORCID,Cooper M C1ORCID,Finkelstein Steven L2ORCID,Jung Intae3ORCID,Pérez-González Pablo G4ORCID,Bagley Micaela B2ORCID,Casey Caitlin M2ORCID,Cooper Olivia R2ORCID,Hathi Nimish P3ORCID,Holwerda Benne W5ORCID,Koekemoer Anton M3ORCID,Kartaltepe Jeyhan S6ORCID,Fernández Vital7ORCID,Larson Rebecca L6ORCID,Lucas Ray A3ORCID,Yung L Y Aaron8ORCID

Affiliation:

1. Department of Physics & Astronomy, University of California , Irvine, 4129 Reines Hall, Irvine, CA 92697 , USA

2. Department of Astronomy, The University of Texas at Austin , Austin, TX 78712 USA

3. Space Telescope Science Institute , 3700 San Martin Dr, Baltimore, MD 21218 , USA

4. Centro de Astrobiología (CAB), CSIC-INTA , Ctra. de Ajalvir km 4, Torrejón de Ardoz, E-28850 Madrid , Spain

5. Physics & Astronomy Department, University of Louisville , Louisville, KY 40292 USA

6. School of Physics and Astronomy, Rochester Institute of Technology , 84 Lomb Memorial Drive, Rochester, NY 14623 , USA

7. Instituto de Investigación Multidisciplinar en Ciencia y Tecnología, Universidad de La Serena , Raul Bitrán 1305, La Serena 2204000 , Chile

8. Astrophysics Science Division, NASA Goddard Space Flight Center , 8800 Greenbelt Rd, Greenbelt, MD 20771 , USA

Abstract

ABSTRACT We present a spectroscopic survey of Ly α emitters in the Extended Groth Strip (EGS) field, targeting the regime near the Epoch of Reionization. Using Keck/DEep Imaging Multi-Object Spectrograph, we observed 947 high-z candidates with photometric redshifts from 3 < zphot < 7 and down to an H-band (Hubble Space Telescope/Wide Field Camera 3 F160W) magnitude limit of <27.5. Observations were taken over the course of eight nights, with integration times ranging from 4 to 7.8 h. Our survey secured 137 unique redshifts, 126 of which are Ly α emitters at 2.8 < z < 6.3 with a mean redshift of $\overline{z} = 4.3$. We provide a comprehensive redshift catalogue for our targets, as well as the reduced one- and two-dimensional spectra for each object. These observations will provide an important auxiliary data set for the JWST Directors Discretionary Early Release Science programme the Cosmic Evolution Early Release Science Survey, which recently completed near- and mid-infrared imaging and spectroscopy of galaxies in the EGS field.

Funder

National Science Foundation

Ministerio de Ciencia e Innovación

MCIN

AEI

W. M. Keck Foundation

Publisher

Oxford University Press (OUP)

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