The JWST FRESCO Survey: Legacy NIRCam/Grism Spectroscopy and Imaging in the two GOODS Fields

P A Oesch, G Brammer, R P Naidu, R J Bouwens, J Chisholm, G D Illingworth, J Matthee, E Nelson, Y Qin, N Reddy, A Shapley, I Shivaei, P Van dokkum, A Weibel, K Whitaker, S Wuyts, A Covelo-Paz, R Endsley, Y Fudamoto, E GiovinazzoT Herard-Demanche, J Kerutt, I Kramarenko, I Labbe, E Leonova, J Lin, D Magee, D Marchesini, M Maseda, C Mason, J Matharu, R A Meyer, C Neufeld, G Prieto Lyon, D Schaerer, R Sharma, M Shuntov, R Smit, M Stefanon, J S B Wyithe, M Xiao

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Abstract

We present the JWST cycle 1 53.8 h medium program FRESCO, short for 'First Reionization Epoch Spectroscopically Complete Observations'. FRESCO covers 62 arcmin2 in each of the two GOODS/CANDELS fields for a total area of 124 arcmin2 exploiting JWST's powerful new grism spectroscopic capabilities at near-infrared wavelengths. By obtaining ∼2 h deep NIRCam/grism observations with the F444W filter, FRESCO yields unprecedented spectra at R ∼1600 covering 3.8-5.0 μm for most galaxies in the NIRCam field of view. This setup enables emission line measurements over most of cosmic history, from strong PAH lines at z ∼0.2-0.5, to Pa α and Pa β at z ∼1-3, He i and [S iii] at z ∼2.5-4.5, H α and [N ii] at z ∼5-6.5, up to [O iii] and H β for z ∼7-9 galaxies. FRESCO's grism observations provide total line fluxes for accurately estimating galaxy stellar masses and calibrating slit-loss corrections of NIRSpec/MSA spectra in the same field. Additionally, FRESCO results in a mosaic of F182M, F210M, and F444W imaging in the same fields to a depth of ∼28.2 mag (5σ in 032 diameter apertures). Here, we describe the overall survey design and the key science goals that can be addressed with FRESCO. We also highlight several, early science results, including: spectroscopic redshifts of Lyman break galaxies that were identified almost 20 yr ago, the discovery of broad-line active galactic nuclei at z > 4, and resolved Pa α maps of galaxies at z ∼1.4. These results demonstrate the enormous power for serendipitous discovery of NIRCam/grism observations.

Original languageEnglish
Article numberstad2411
Pages (from-to)2864-2874
Number of pages11
JournalMonthly Notices of the Royal Astronomical Society
Volume525
Issue number2
Early online date16 Aug 2023
DOIs
Publication statusPublished - 31 Oct 2023

Bibliographical note

Funding Information:
Support for this work was provided by NASA through grant JWST-GO-01895 awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.

Funding Information:
RAM acknowledges support from the ERC Advanced Grant 740246 (Cosmic_Gas).

Funding Information:
RPN acknowledges funding from JWST programs GO-1933 and GO-2279. Support for this work was provided by NASA through the NASA Hubble Fellowship grant HST-HF2-51515.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555.

Funding Information:
CM and GPL acknowledge support by the VILLUM FONDEN under grant 37459.

Funding Information:
YF acknowledges support from NAOJ ALMA Scientific Research Grant number 2020-16B.

Funding Information:
This work has received funding from the Swiss State Secretariat for Education, Research and Innovation (SERI) under contract number MB22.00072, as well as from the Swiss National Science Foundation (SNSF) through project grant 200020_207349. The Cosmic Dawn Center (DAWN) is funded by the Danish National Research Foundation under grant no. 140.

Funding Information:
YQ and JSBW acknowledge support from the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013.

Keywords

  • dark ages, reionization, first stars
  • galaxies: evolution
  • galaxies: formation
  • galaxies: high-redshift
  • surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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