Suppression of Star Formation in Galaxy Pairs

Shuai Feng; Shi-Yin Shen; Fang-Ting Yuan; Wen-Xin Zhong; Wen-Yuan Cui; Lin-Lin Li

doi:10.3847/1538-4357/ad343e

The Astrophysical Journal (Jan 2024)

Suppression of Star Formation in Galaxy Pairs

Shuai Feng,
Shi-Yin Shen,
Fang-Ting Yuan,
Wen-Xin Zhong,
Wen-Yuan Cui,
Lin-Lin Li

Affiliations

Shuai Feng: ORCiD; College of Physics, Hebei Normal University , 20 South Erhuan Road, Shijiazhuang 050024, People's Republic of China ; [email protected]; Guoshoujing Institute of Astronomy, Hebei Normal University , 20 South Erhuan Road, Shijiazhuang 050024, People's Republic of China; Hebei Key Laboratory of Photophysics Research and Application , Shijiazhuang 050024, People's Republic of China
Shi-Yin Shen: ORCiD; Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences , 80 Nandan Road, Shanghai 200030, People's Republic of China ; [email protected]; Key Lab for Astrophysics , Shanghai 200234, People's Republic of China
Fang-Ting Yuan: ORCiD; Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences , 80 Nandan Road, Shanghai 200030, People's Republic of China ; [email protected]
Wen-Xin Zhong: ORCiD; Sanda University , No. 2727 Jinhai Road, Shanghai 201209, People's Republic of China
Wen-Yuan Cui: ORCiD; College of Physics, Hebei Normal University , 20 South Erhuan Road, Shijiazhuang 050024, People's Republic of China ; [email protected]; Guoshoujing Institute of Astronomy, Hebei Normal University , 20 South Erhuan Road, Shijiazhuang 050024, People's Republic of China
Lin-Lin Li: ORCiD; College of Physics, Hebei Normal University , 20 South Erhuan Road, Shijiazhuang 050024, People's Republic of China ; [email protected]; Guoshoujing Institute of Astronomy, Hebei Normal University , 20 South Erhuan Road, Shijiazhuang 050024, People's Republic of China

DOI: https://doi.org/10.3847/1538-4357/ad343e
Journal volume & issue: Vol. 965, no. 1
p. 60

Abstract

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We investigate the suppression of star formation in galaxy pairs based on the isolated galaxy pair sample derived from the Sloan Digital Sky Survey survey. By comparing the star formation rate between late-type galaxies (LTGs) in galaxy pairs and those in the isolated environment, we detect a signal of the suppression of star formation in galaxy pairs at d _p 2.5). The suppression of star formation in wide galaxy pairs at 200 kpc < d _p < 350 kpc mainly occurs in massive LTGs, while in close galaxy pairs at d _p < 100 kpc, it only appears in LTGs with a massive companion ( $\mathrm{log}{M}_{\star }\gt 11.0$ ), nearly independent of their own stellar mass. Based on these findings, we infer that the suppression of star formation in wide galaxy pairs is actually a result of galaxy conformity, while in close galaxy pairs, it stems from the influence of hot circumgalactic medium surrounding companion galaxies.

Published in The Astrophysical Journal

ISSN: 1538-4357 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Astronomy: Astrophysics
Website: https://iopscience.iop.org/journal/0004-637X

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