X-Ray bright active galactic nuclei in massive galaxy clusters - II. The fraction of galaxies hosting active nuclei
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X-Ray bright active galactic nuclei in massive galaxy clusters - II. The fraction of galaxies hosting active nuclei. / Ehlert, S.; von der Linden, A.; Allen, S. W.; Brandt, W. N.; Xue, Y. Q.; Luo, B.; Mantz, A.; Morris, R. G.; Applegate, D.; Kelly, P.
In: Monthly Notices of the Royal Astronomical Society, Vol. 437, No. 2, stt2025, 01.11.2013, p. 1942-1949.Research output: Contribution to journal › Journal article › Research › peer-review
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T1 - X-Ray bright active galactic nuclei in massive galaxy clusters - II. The fraction of galaxies hosting active nuclei
AU - Ehlert, S.
AU - von der Linden, A.
AU - Allen, S. W.
AU - Brandt, W. N.
AU - Xue, Y. Q.
AU - Luo, B.
AU - Mantz, A.
AU - Morris, R. G.
AU - Applegate, D.
AU - Kelly, P.
PY - 2013/11/1
Y1 - 2013/11/1
N2 - We present a measurement of the fraction of cluster galaxies hosting X-ray bright active galactic nuclei (AGN) as a function of clustercentric distance scaled in units of r500. Our analysis employs high-quality Chandra X-ray and Subaru optical imaging for 42 massive X-ray-selected galaxy cluster fields spanning the redshift range 0.2 < z < 0.7. In total, our study involves 176 AGN with bright (R < 23) optical counterparts above a 0.5-8.0 keV flux limit of 10-14 erg cm-2 s-1. When excluding central dominant galaxies from the calculation, we measure a cluster galaxy AGN fraction in the central regions of the clusters that is~3 times lower than the field value. This fraction increases with clustercentric distance before becoming consistent with the field at ~2.5r500. Our data exhibit similar radial trends to those observed for star formation and optically selected AGN in cluster member galaxies, both of which are also suppressed near cluster centres to a comparable extent. These results strongly support the idea that X-ray AGN activity and strong star formation are linked through their common dependence on available reservoirs of cold gas.
AB - We present a measurement of the fraction of cluster galaxies hosting X-ray bright active galactic nuclei (AGN) as a function of clustercentric distance scaled in units of r500. Our analysis employs high-quality Chandra X-ray and Subaru optical imaging for 42 massive X-ray-selected galaxy cluster fields spanning the redshift range 0.2 < z < 0.7. In total, our study involves 176 AGN with bright (R < 23) optical counterparts above a 0.5-8.0 keV flux limit of 10-14 erg cm-2 s-1. When excluding central dominant galaxies from the calculation, we measure a cluster galaxy AGN fraction in the central regions of the clusters that is~3 times lower than the field value. This fraction increases with clustercentric distance before becoming consistent with the field at ~2.5r500. Our data exhibit similar radial trends to those observed for star formation and optically selected AGN in cluster member galaxies, both of which are also suppressed near cluster centres to a comparable extent. These results strongly support the idea that X-ray AGN activity and strong star formation are linked through their common dependence on available reservoirs of cold gas.
KW - Galaxies: Active
KW - Galaxies: Clusters: General
KW - Galaxies: Photometry
KW - X-rays: Galaxies
KW - Xrays: Galaxies: Clusters
U2 - 10.1093/mnras/stt2025
DO - 10.1093/mnras/stt2025
M3 - Journal article
AN - SCOPUS:84890932106
VL - 437
SP - 1942
EP - 1949
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 2
M1 - stt2025
ER -
ID: 122297356