COSMOS2020: Ubiquitous AGN Activity of Massive Quiescent Galaxies at 0 < z < 5 Revealed by X-Ray and Radio Stacking
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COSMOS2020 : Ubiquitous AGN Activity of Massive Quiescent Galaxies at 0 < z < 5 Revealed by X-Ray and Radio Stacking. / Ito, Kei; Tanaka, Masayuki; Miyaji, Takamitsu; Ilbert, Olivier; Kauffmann, Olivier B.; Koekemoer, Anton M.; Marchesi, Stefano; Shuntov, Marko; Toft, Sune; Valentino, Francesco; Weaver, John R.
In: Astrophysical Journal, Vol. 929, No. 1, 53, 01.04.2022.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - COSMOS2020
T2 - Ubiquitous AGN Activity of Massive Quiescent Galaxies at 0 < z < 5 Revealed by X-Ray and Radio Stacking
AU - Ito, Kei
AU - Tanaka, Masayuki
AU - Miyaji, Takamitsu
AU - Ilbert, Olivier
AU - Kauffmann, Olivier B.
AU - Koekemoer, Anton M.
AU - Marchesi, Stefano
AU - Shuntov, Marko
AU - Toft, Sune
AU - Valentino, Francesco
AU - Weaver, John R.
PY - 2022/4/1
Y1 - 2022/4/1
N2 - We characterize the average X-ray and radio properties of quiescent galaxies (QGs) with log(M-*/M-circle dot)> 10 at 0 < z < 5. QGs are photometrically selected from the latest COSMOS2020 catalog. We conduct the stacking analysis of X-ray images of the Chandra COSMOS Legacy Survey for individually undetected QGs. Thanks to the large sample and deep images, the stacked X-ray signal is significantly detected up to z similar to 5. The average X-ray luminosity cannot be explained by the X-ray luminosity of X-ray binaries, suggesting that the low-luminosity active galactic nuclei (AGNs) ubiquitously exist in QGs. Moreover, the X-ray AGN luminosity of QGs at z > 1.5 is higher than that of star-forming galaxies (SFGs), derived in the same manner as QGs. The stacking analysis of the VLA-COSMOS images is conducted for the identical sample, and the radio signal for QGs is also detected up to z similar to 5. We find that the radio AGN luminosity of QGs at z > 1.5 is also higher than SFGs, which is in good agreement with the X-ray analysis. The enhanced AGN activity in QGs suggested by the individual analysis in the X-ray and radio wavelength supports its important role for quenching at high redshift. Their enhanced AGN activity is less obvious at z < 1.5, which can be interpreted as an increasing role of others at lower redshifts, such as environmental quenching.
AB - We characterize the average X-ray and radio properties of quiescent galaxies (QGs) with log(M-*/M-circle dot)> 10 at 0 < z < 5. QGs are photometrically selected from the latest COSMOS2020 catalog. We conduct the stacking analysis of X-ray images of the Chandra COSMOS Legacy Survey for individually undetected QGs. Thanks to the large sample and deep images, the stacked X-ray signal is significantly detected up to z similar to 5. The average X-ray luminosity cannot be explained by the X-ray luminosity of X-ray binaries, suggesting that the low-luminosity active galactic nuclei (AGNs) ubiquitously exist in QGs. Moreover, the X-ray AGN luminosity of QGs at z > 1.5 is higher than that of star-forming galaxies (SFGs), derived in the same manner as QGs. The stacking analysis of the VLA-COSMOS images is conducted for the identical sample, and the radio signal for QGs is also detected up to z similar to 5. We find that the radio AGN luminosity of QGs at z > 1.5 is also higher than SFGs, which is in good agreement with the X-ray analysis. The enhanced AGN activity in QGs suggested by the individual analysis in the X-ray and radio wavelength supports its important role for quenching at high redshift. Their enhanced AGN activity is less obvious at z < 1.5, which can be interpreted as an increasing role of others at lower redshifts, such as environmental quenching.
KW - HUBBLE-SPACE-TELESCOPE
KW - STAR-FORMATION
KW - GALACTIC NUCLEI
KW - STELLAR MASS
KW - PASSIVE GALAXIES
KW - COOLING FLOWS
KW - BLACK-HOLES
KW - EVOLUTION
KW - ENVIRONMENT
KW - POPULATION
U2 - 10.3847/1538-4357/ac5aaf
DO - 10.3847/1538-4357/ac5aaf
M3 - Journal article
VL - 929
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1
M1 - 53
ER -
ID: 319533788