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SEEDisCS. II. Molecular gas in galaxy clusters and their large-scale structure: low gas fraction galaxies, the case of CL1301.7−1139

Spérone-Longin, D. and Jablonka, P. and Combes, F. and Castignani, G. and Krips, M. and Rudnick, G. and Desjardins, T. and Zaritsky, D. and Finn, R. A. and De Lucia, G. and Desai, V. (2021) SEEDisCS. II. Molecular gas in galaxy clusters and their large-scale structure: low gas fraction galaxies, the case of CL1301.7−1139. Astronomy and Astrophysics, 654 . Art. No. A69. ISSN 0004-6361. doi:10.1051/0004-6361/202140941.

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This paper is the second of a series that tackles the properties of molecular gas in galaxies residing in clusters and their related large-scale structures. Out of 21 targeted fields, 19 galaxies were detected in CO(3–2) with the Atacama Large Millimeter Array, including two detections within a single field. These galaxies are either bona fide members of the CL1301.7−1139 cluster (z = 0.4828, σ_(cl) = 681 km s⁻¹), or located within ∼7 × R₂₀₀, its virial radius. They have been selected to sample the range of photometric local densities around CL1301.7−1139, with stellar masses above log(M_(star)) = 10, and to be located in the blue clump of star-forming galaxies derived from the u, g, and i photometric bands. Unlike previous works, our sample selection does not impose a minimum star formation rate or detection in the far-infrared. As such and as much as possible, it delivers an unbiased view of the gas content of normal star-forming galaxies at z ∼ 0.5. Our study highlights the variety of paths to star formation quenching, and most likely the variety of physical properties (i.e., temperature, density) of the corresponding galaxy’s cold molecular gas. Just as in the case of CL1411.1−1148, although to a smaller extent, we identify a number of galaxies with lower gas fraction than classically found in other surveys. These galaxies can still be on the star-forming main sequence. When these galaxies are not inside the cluster virialised region, we provide hints that they are linked to their infall regions within ∼4 × R₂₀₀.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Spérone-Longin, D.0000-0002-3752-2502
Combes, F.0000-0003-2658-7893
Castignani, G.0000-0001-6831-0687
Rudnick, G.0000-0001-5851-1856
Desjardins, T.0000-0001-6905-1859
Zaritsky, D.0000-0002-5177-727X
Finn, R. A.0000-0001-8518-4862
De Lucia, G.0000-0002-6220-9104
Desai, V.0000-0002-1340-0543
Additional Information:© ESO 2021. Article published by EDP Sciences. Received 30 March 2021; Accepted 26 July 2021; Published online 12 October 2021. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2017.1.00257.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. The authors are indebted to the International Space Science Institute (ISSI), Bern, Switzerland, for supporting and funding the international team ‘The Effect of Dense Environments on Gas in Galaxies over 10 Billion Years of Cosmic Time’. We are grateful to the Numpy (Oliphant 2006; Van Der Walt et al. 2011), SciPy (Virtanen et al. 2020), Matplotlib (Hunter 2007), IPython (Pérez & Granger 2007), and Astropy (Astropy Collaboration 2013, 2018) teams for providing the scientific community with essential Python tools.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
International Space Science Institute (ISSI)UNSPECIFIED
Subject Keywords:galaxies: evolution – galaxies: clusters: general – submillimeter: galaxies
Record Number:CaltechAUTHORS:20211022-164929687
Persistent URL:
Official Citation:SEEDisCS - II. Molecular gas in galaxy clusters and their large-scale structure: low gas fraction galaxies, the case of CL1301.7−1139. D. Spérone-Longin, P. Jablonka, F. Combes, G. Castignani, M. Krips, G. Rudnick, T. Desjardins, D. Zaritsky, R. A. Finn, G. De Lucia and V. Desai. A&A, 654 (2021) A69; DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:111603
Deposited By: Tony Diaz
Deposited On:22 Oct 2021 23:51
Last Modified:26 Oct 2021 16:30

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