The VLA-COSMOS 3 GHz Large Project: Star formation properties and radio luminosity functions of AGN with moderate-to-high radiative luminosities out to z∼ 6
The VLA-COSMOS 3 GHz Large Project: Star formation properties and radio luminosity functions of AGN with moderate-to-high radiative luminosities out to z∼ 6
复制标题
VLA-COSMOS 3 GHz 大型项目：恒星形成特性和 AGN 的射电光度函数，辐射光度高达 z 6
DOI：
10.1051/0004-6361/201833935
复制
发表时间：
2018
影响因子：
6.5
通讯作者：
Delvecchio
中科院分区：
文献类型：
--
作者：
Smolčić;Delvecchio
我们研究了在VLA-COSMOS 3ghz大型项目中选择的1604个中高辐射亮度活动星系核（HLAGN）样本。通过结合多种AGN诊断方法进行分类：x射线数据、中红外数据和宽带光谱能量分布拟合。通过测量相对于恒星形成星系的红外-射电相关性，我们将总射电1.4 GHz光度（L1.4 GHz， TOT）分解为恒星形成和AGN活动产生的辐射。为了量化过剩，对于每个源，我们计算了AGN分数（fAGN），定义为AGN活动的分数贡献。大部分HLAGN(68.0±1.5)%以恒星形成过程（fAGN≤0.5）为主，而（32.0±1.5）%以agn相关射电发射（0.5 <fAGN≤1）为主。我们利用AGN相关的1.4 GHz发射，推导出了HLAGN的1.4 GHz AGN光度函数。通过假设纯密度和纯光度演化模型，我们将它们的宇宙演化限制在toz ~ 6，得到Φ*(z)∝(1 +z)(2.64±0.10)+(−0.61±0.04)zandL*(z)∝(1 +z)(3.97±0.15)+(−0.92±0.06)z。这些演化规律表明，HLAGN的数量和光度密度从较高的红移（z ~ 6）开始增加，在红移范围1 <z< 2.5达到最大值，然后向局域值下降。通过使用标准转换将1.4 GHz AGN的光度缩放为动力学光度，我们估计了动力学光度密度作为红移的函数。我们将我们的结果与无线电模式反馈的半解析模型进行了比较，发现这种反馈可能在HLAGN中agn -宿主共同进化的背景下发挥了重要作用，这显示了agn相关无线电发射（fAGN>）的证据。
We have studied a sample of 1604 moderate-to-high radiative luminosity active galactic nuclei (HLAGN) selected at 3 GHz within the VLA-COSMOS 3 GHz Large Project. These were classified by combining multiple AGN diagnostics: X-ray data, mid-infrared data and broadband spectral energy distribution fitting. We decomposed the total radio 1.4 GHz luminosity (L1.4 GHz, TOT) into the emission originating from star formation and AGN activity by measuring the excess inL1.4 GHz, TOTrelative to the infrared-radio correlation of star-forming galaxies. To quantify the excess, for each source we calculated the AGN fraction (fAGN) defined as the fractional contribution of AGN activity toL1.4 GHz, TOT. The majority of the HLAGN, (68.0 ± 1.5)%, are dominated by star-forming processes (fAGN≤ 0.5), while (32.0 ± 1.5)% are dominated by AGN-related radio emission (0.5 <fAGN≤ 1). We used the AGN-related 1.4 GHz emission to derive the 1.4 GHz AGN luminosity functions of HLAGN. By assuming pure density and pure luminosity evolution models we constrained their cosmic evolution out toz∼ 6, finding Φ*(z)∝(1 +z)(2.64 ± 0.10)+(−0.61 ± 0.04)zandL*(z)∝(1 +z)(3.97 ± 0.15)+(−0.92 ± 0.06)z. These evolutionary laws show that the number and luminosity density of HLAGN increased from higher redshifts (z∼ 6) up to a maximum in the redshift range 1 <z< 2.5, followed by a decline toward local values. By scaling the 1.4 GHz AGN luminosity to kinetic luminosity using the standard conversion, we estimate the kinetic luminosity density as a function of redshift. We compare our result to the semi-analytic models of radio mode feedback, and find that this feedback could have played an important role in the context of AGN-host co-evolution in HLAGN which shows evidence of AGN-related radio emission (fAGN> 0).
登录
查看更多内容
DOI：
10.1086/163685
发表时间：
1985-12
期刊：
The Astrophysical Journal
影响因子：
--
作者：
H. Marshall
通讯作者：
H. Marshall
DOI：
10.3847/0067-0049/224/2/24
发表时间：
2016-04
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
C. Laigle;H. McCracken;O. Ilbert;B. Hsieh;I. Davidzon;P. Capak;G. Hasinger;J. Silverman;C. Pi
通讯作者：
C. Laigle;H. McCracken;O. Ilbert;B. Hsieh;I. Davidzon;P. Capak;G. Hasinger;J. Silverman;C. Pi
DOI：
10.1111/j.1365-2966.2006.09994.x
发表时间：
2006-02
影响因子：
4.8
作者：
D. Croton;G. Kauffmann;V. Springel;S. White;G. Lucia;A. Jenkins;J. Navarro;C. Frenk;Liang Gao-Lian
通讯作者：
D. Croton;G. Kauffmann;V. Springel;S. White;G. Lucia;A. Jenkins;J. Navarro;C. Frenk;Liang Gao-Lian
AGN 爆发对周围星系的影响
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
Y.Fujita;T.N.Kato;藤田 裕;藤田 裕;藤田 裕;藤田 裕
通讯作者：
藤田 裕
影响因子：
6.5
作者：
V. Smolčić;M. Novak;I. Delvecchio;L. Ceraj;M. Bondi;J. Delhaize;S. Marchesi;E. Murphy;E. Schinnerer;E. Vardoulaki;G. Zamorani
通讯作者：
V. Smolčić;M. Novak;I. Delvecchio;L. Ceraj;M. Bondi;J. Delhaize;S. Marchesi;E. Murphy;E. Schinnerer;E. Vardoulaki;G. Zamorani