The Astronomical Journal (Jan 2023)
COSMOS2020: Exploring the Dawn of Quenching for Massive Galaxies at 3 < z < 5 with a New Color-selection Method
- Katriona M. L. Gould,
- Gabriel Brammer,
- Francesco Valentino,
- Katherine E. Whitaker,
- John. R. Weaver,
- Claudia del P. Lagos,
- Francesca Rizzo,
- Maximilien Franco,
- Bau-Ching Hsieh,
- Olivier Ilbert,
- Shuowen Jin,
- Georgios Magdis,
- Henry J. McCracken,
- Bahram Mobasher,
- Marko Shuntov,
- Charles L. Steinhardt,
- Victoria Strait,
- Sune Toft
Affiliations
- Katriona M. L. Gould
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200 Copenhagen N, Denmark
- Gabriel Brammer
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200 Copenhagen N, Denmark
- Francesco Valentino
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200 Copenhagen N, Denmark; European Southern Observatory , Karl-Schwarzschild-Strasse 2, D-85748 Garching bei Munchen, Germany
- Katherine E. Whitaker
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Department of Astronomy, University of Massachusetts , Amherst, MA 01003, USA
- John. R. Weaver
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200 Copenhagen N, Denmark; Department of Astronomy, University of Massachusetts , Amherst, MA 01003, USA
- Claudia del P. Lagos
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; International Centre for Radio Astronomy Research (ICRAR), M468, University of Western Australia , 35 Stirling Hwy, Crawley, WA 6009, Australia; ARC of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) , Australia
- Francesca Rizzo
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200 Copenhagen N, Denmark
- Maximilien Franco
- ORCiD
- Department of Astronomy, The University of Texas at Austin , Austin, TX 78712, USA
- Bau-Ching Hsieh
- ORCiD
- Academia Sinica Institute of Astronomy and Astrophysics , No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
- Olivier Ilbert
- ORCiD
- Aix Marseille Univ , CNRS, CNES, LAM, Marseille, France
- Shuowen Jin
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; DTU-Space, Technical University of Denmark , Elektrovej 327, DK-2800 Kgs. Lyngby, Denmark
- Georgios Magdis
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200 Copenhagen N, Denmark; DTU-Space, Technical University of Denmark , Elektrovej 327, DK-2800 Kgs. Lyngby, Denmark
- Henry J. McCracken
- ORCiD
- Institut d’Astrophysique de Paris, UMR 7095, CNRS, and Sorbonne Université , 98 bis boulevard Arago, F-75014 Paris, France
- Bahram Mobasher
- ORCiD
- Department of Physics and Astronomy, University of California, Riverside , 900 University Avenue, Riverside, CA 92521, USA
- Marko Shuntov
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200 Copenhagen N, Denmark
- Charles L. Steinhardt
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200 Copenhagen N, Denmark
- Victoria Strait
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200 Copenhagen N, Denmark
- Sune Toft
- ORCiD
- Cosmic Dawn Center (DAWN) , Denmark; Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200 Copenhagen N, Denmark
- DOI
- https://doi.org/10.3847/1538-3881/accadc
- Journal volume & issue
-
Vol. 165,
no. 6
p. 248
Abstract
We select and characterize a sample of massive (log( M _* / M _⊙ ) > 10.6) quiescent galaxies (QGs) at 3 3. We compute median rest-frame spectral energy distributions for our sample and find the median QG at 3 < z < 5 has a strong Balmer/4000 Å break, and residual NUV flux indicating recent quenching. We find the number densities of the entire quiescent population (including post-starbursts) more than doubles from 3.5 ± 2.2 × 10 ^−6 Mpc ^−3 at 4 < z < 5 to 1.4 ± 0.4 × 10 ^−5 Mpc ^−3 at 3 < z < 4, confirming that the onset of massive galaxy quenching occurs as early as 3 < z < 5.
Keywords
