An extinction-free AGN selection by 18-band SED fitting in mid-infrared in the AKARI NEP deep field
An extinction-free AGN selection by 18-band SED fitting in mid-infrared in the AKARI NEP deep field
复制标题
通过 AKARI NEP 深场中红外 18 波段 SED 拟合进行无消光 AGN 选择
DOI:
10.1093/mnras/stx1947
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发表时间:
2017
影响因子:
4.8
通讯作者:
H. Matsuhara
中科院分区:
文献类型:
--
作者:
Ting;T. Goto;T. Hashimoto;N. Oi;H. Matsuhara
We have developed an efficient Active Galactic Nucleus (AGN) selection method using 18-band Spectral Energy Distribution (SED) fitting in mid-infrared (mid-IR). AGNs are often obscured by gas and dust, and those obscured AGNs tend to be missed in optical, UV and soft X-ray observations. Mid-IR light can help us to recover them in an obscuration free way using their thermal emission. On the other hand, Star-Forming Galaxies (SFG) also have strong PAH emission features in mid-IR. Hence, establishing an accurate method to separate populations of AGN and SFG is important. However, in previous mid-IR surveys, only 3 or 4 filters were available, and thus the selection was limited. We combined AKARI's continuous 9 mid-IR bands with WISE and Spitzer data to create 18 mid-IR bands for AGN selection. Among 4682 galaxies in the AKARI NEP deep field, 1388 are selected to be AGN hosts, which implies an AGN fraction of 29.6$\pm$0.8$\%$ (among them 47$\%$ are Seyfert 1.8 and 2). Comparing the result from SED fitting into WISE and Spitzer colour-colour diagram reveals that Seyferts are often missed by previous studies. Our result has been tested by stacking median magnitude for each sample. Using X-ray data from Chandra, we compared the result of our SED fitting with WISE's colour box selection. We recovered more X-ray detected AGN than previous methods by 20$\%$.
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DOI:
--
发表时间:
2006
期刊:
Publ.Astro.Soc.Japan 58(in press)
影响因子:
--
作者:
Hideo MATSUHARA;et al.;Hitoshi HANAMI;Toshinobu TAKAGI et al.;Hideo Matsuhara
通讯作者:
Hideo Matsuhara
DOI:
10.1111/j.1365-2966.2011.18499.x
发表时间:
2011-02
影响因子:
4.8
作者:
T. Goto;S. Arnouts;Matthew Malkan Toshinobu Takagi;H. Inami;C. Pearson;T. Wada;H. Matsuhara;C. Yamauchi;T. Takeuchi;T. Nakagawa;S. Oyabu;D. Ishihara;D. Sanders;E. Floc’h;Hyung-Mok Lee;W. Jeong;S. Serjeant;C. Sedgwick
通讯作者:
T. Goto;S. Arnouts;Matthew Malkan Toshinobu Takagi;H. Inami;C. Pearson;T. Wada;H. Matsuhara;C. Yamauchi;T. Takeuchi;T. Nakagawa;S. Oyabu;D. Ishihara;D. Sanders;E. Floc’h;Hyung-Mok Lee;W. Jeong;S. Serjeant;C. Sedgwick
DOI:
10.1086/422816
发表时间:
2004-05
期刊:
The Astrophysical Journal Supplement Series
影响因子:
--
作者:
M. Lacy;L. Storrie-Lombardi;A. Sajina;P. Appleton;L. Armus;S. Chapman;P. Choi;D. Fadda;F. Fang
通讯作者:
M. Lacy;L. Storrie-Lombardi;A. Sajina;P. Appleton;L. Armus;S. Chapman;P. Choi;D. Fadda;F. Fang
DOI:
10.1088/0004-6256/140/6/1868
发表时间:
2010-07
期刊:
The Astronomical Journal
影响因子:
--
作者:
E. Wright;P. Eisenhardt;A. Mainzer;M. Ressler;R. Cutri;T. Jarrett;J. Kirkpatrick;D. Padgett;
通讯作者:
E. Wright;P. Eisenhardt;A. Mainzer;M. Ressler;R. Cutri;T. Jarrett;J. Kirkpatrick;D. Padgett;
影响因子:
6.5
作者:
Murata;K.; Matsuhara;H.; Inami;H.; Wada;T.; Goto;T.; Armus;L.; Pearson;C.; Serjeant;S.;;Miyaji,T.
通讯作者:
Miyaji,T.