Investigating the Dominant Environmental Quenching Process in UVCANDELS/COSMOS Groups

Maxwell Kuschel, Claudia Scarlata, Vihang Mehta, Harry I. Teplitz, Marc Rafelski, Xin Wang, Ben Sunnquist, Laura Prichard, Norman Grogin, Anton Koekemoer, Rogier Windhorst, Michael Rutkowski, Anahita Alavi, Nima Chartab, Christopher J. Conselice, Y. Sophia Dai, Eric Gawiser, Mauro Giavalisco, Pablo Arrabal Haro, Nimish HathiRolf A. Jansen, Zhiyuan Ji, Ray A. Lucas, Kameswara Mantha, Bahram Mobasher, Robert W. O’Connell, Brant Robertson, Zahra Sattari, L. Y. Aaron Yung, Romeel Davé, Duilia DeMello, Mark Dickinson, Henry Ferguson, Steven L. Finkelstein, Matt Hayes, Justin Howell, Sugata Kaviraj, John W. Mackenty, Brian Siana

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Abstract

We explore how the fraction of quenched galaxies changes in groups of galaxies with respect to the distance to the center of the group, redshift, and stellar mass to determine the dominant process of environmental quenching in 0.2 < z < 0.8 groups. We use new UV data from the UVCANDELS project in addition to existing multiband photometry to derive new galaxy physical properties of the group galaxies from the zCOSMOS 20 k group catalog. Limiting our analysis to a complete sample of log (M */M ) > 10.56 group galaxies, we find that the probability of being quenched increases slowly with decreasing redshift, diverging from the stagnant field galaxy population. A corresponding analysis on how the probability of being quenched increases with time within groups suggests that the dominant environmental quenching process is characterized by slow (∼Gyr) timescales. We find a quenching time of approximately 4.91 − 1.47 + 0.91 Gyr, consistent with the slow processes of strangulation and delayed-then-rapid quenching although more data are needed to confirm this result.

Original languageEnglish
Article number17
Number of pages10
JournalThe Astrophysical Journal
Volume947
Issue number1
DOIs
Publication statusPublished - 12 Apr 2023

Keywords

  • 310
  • Galaxies and Cosmology

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