SMBH accretion properties of radio-selected AGN out to z ∼ 4

SMBH accretion properties of radio-selected AGN out to z ∼ 4
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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
J. Delhaize
中科院分区:
物理与天体物理2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

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探索放射性活动星系核(AGN)的行为和演化是了解AGN反馈如何影响星系演化的关键。在这项工作中,我们研究了1.4 GHz的无线电连续活动星系核光度(LAGN 1.4),比黑洞吸积率(s-BHAR,定义为吸积光度相对于星系恒星质量)和红移之间的关系,在VLA COSMOS 3 GHz大型项目的无线电选择活动星系核的亮度完整的样本。该样本最初是从3 GHz的射电连续观测中选取的,包括大约1800个射电活动星系核,这些活动星系核是通过相对于恒星形成星系的红外-射电相关的射电过剩(>2σ)来识别的。我们进一步选取了一个包含1200多个射电活动星系核的子样本,这些活动星系核在不同的红移范围内都是完整的,直到z~4,并利用X射线叠加计算了每个LAGN 1.4-z仓中的平均s-BHAR。我们发现,平均s-BHAR是独立的LAGN 1.4,在所有的红移。然而,我们看到s-BHAR随着红移的强烈增加,在固定的LAGN 1.4。这种趋势类似于在固定LAGN 1.4时,恒星形成宿主星系的比例(基于(NUV−r)/(r−J)颜色)随着红移的强烈增加。对这种相似性的一个可能的解释可能意味着活动星系核的平均辐射功率和宿主星系内冷气供应的可用性之间的联系。这项研究证实了这样的想法,即无线电选择AGN变得更辐射效率对早期的时代,独立于他们的无线电功率。
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
DOI: 10.1093/mnras/stu1776
发表时间: 2014-11-21
影响因子: 4.8
作者:
Best, P. N.;Ker, L. M.;Sabater, J.
通讯作者: Sabater, J.