SMBH accretion properties of radio-selected AGN out to z ∼ 4
SMBH accretion properties of radio-selected AGN out to z ∼ 4
复制标题
无线电选择 AGN 的 SMBH 吸积特性到 z 〜 4
DOI:
10.1093/mnras/sty2600
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发表时间:
2018
影响因子:
4.8
通讯作者:
J. Delhaize
中科院分区:
文献类型:
--
作者:
I. Delvecchio;V. Smolčić;G. Zamorani;D. Rosario;M. Bondi;S. Marchesi;T. Miyaji;M. Novak;M. Sargent;D. Alexander;J. Delhaize
Exploring how radio-emitting active galactic nuclei (AGN) behave and evolve with time is critical for understanding how AGN feedback impacts galaxy evolution. In this work, we investigate the relationship between 1.4 GHz radio continuum AGN luminosity (LAGN1.4), specific black hole accretion rate (s-BHAR, defined as the accretion luminosity relative to the galaxy stellar mass) and redshift, for a luminosity-complete sample of radio-selected AGN in the VLA COSMOS 3 GHz Large Project. The sample was originally selected from radio-continuum observations at 3 GHz, and includes about 1800 radio AGN identified via (>2σ) radio-excess relative to the infrared-radio correlation of star-forming galaxies. We further select a subsample of over 1200 radio AGN that is complete in LAGN1.4 over different redshift ranges, out to z~4, and use X-ray stacking to calculate the average s-BHAR in each LAGN1.4-z bin. We find that the average s-BHAR is independent of LAGN1.4, at all redshifts. However, we see a strong increase of s-BHAR with redshift, at fixed LAGN1.4. This trend resembles the strong increase in the fraction of star-forming host galaxies (based on the (NUV−r) / (r−J) colours) with redshift, at fixed LAGN1.4. A possible explanation for this similarity might imply a link between average AGN radiative power and availability of cold gas supply within the host galaxy. This study corroborates the idea that radio-selected AGN become more radiatively efficient towards earlier epochs, independently of their radio power.
DOI:
10.1088/2041-8205/714/2/l190
发表时间:
2010-03
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
M. Sargent;E. Schinnerer;E. Murphy;C. Carilli;G. Helou;H. Aussel;É. Le Floc'h;D. Frayer;O. Ilbert;P. Oesch;M. Salvato;V. Smolčić;J. Kartaltepe;D. Sanders
通讯作者:
M. Sargent;E. Schinnerer;E. Murphy;C. Carilli;G. Helou;H. Aussel;É. Le Floc'h;D. Frayer;O. Ilbert;P. Oesch;M. Salvato;V. Smolčić;J. Kartaltepe;D. Sanders
DOI:
10.1088/0067-0049/188/2/384
发表时间:
2010-05
期刊:
The Astrophysical Journal Supplement Series
影响因子:
--
作者:
E. Schinnerer;M. Sargent;M. Bondi;V. Smolčić;A. Datta;C. Carilli;F. Bertoldi;A. Blain;P. Ciliegi;A. Koekemoer;N. Scoville
通讯作者:
E. Schinnerer;M. Sargent;M. Bondi;V. Smolčić;A. Datta;C. Carilli;F. Bertoldi;A. Blain;P. Ciliegi;A. Koekemoer;N. Scoville
影响因子:
4.8
作者:
Best, P. N.;Ker, L. M.;Sabater, J.
通讯作者:
Sabater, J.