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arXiv 2202.10044astro-ph.GA
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用亚毫米波数据拟合SED确定活动星系核宿主星系的恒星形成率

Determining star formation rates of active galactic nuclei host galaxies based on SED fitting with sub-mm data

Changseok Kim, Jong-Hak Woo, Yashashree Jadhav, Aeree Chung, Junhyun Baek, Jeong Ae Lee, Jaejin Shin, Ho Seong Hwang, Rongxin Luo, Donghoon Son, HyunGi Kim, Hyuk Woo

摘要:

我们提出的恒星形成率(SFR)测量的基础上的光谱能量分布(SED)分析与新的亚毫米流量结合档案的多波长数据的52个AGN的主机星系在z $<0.2$。我们进行了亚毫米观测使用SCUBA-2相机在詹姆斯·克拉克麦克斯韦望远镜,并获得通量或上限在450和850 $μ$ m的每个目标。通过实验发现,如果忽略活动星系核的贡献,尘埃的光度会被高估。虽然与基于尘埃光度的SFR相比,基于4000 μ m break的SFR显示出显著的偏移,但通过人工神经网络获得的SFR(Ellison et al. 2016)通常显示出一致性,尽管散射很大。我们发现,SFR与活动星系核流出强度相关,这些流出强度由[OIII] $λ5007$发射线表现出来,并且具有较高爱丁顿比和较强流出的活动星系核通常由具有较高SFR的星系托管,这与Woo et al.(2020)报道的相关性一致。这表明,由于活动星系核的反馈,恒星的形成没有瞬时猝灭。

英文摘要:

We present the star formation rate (SFR) measurements based on the spectral energy distribution (SED) analysis with new sub-mm fluxes combined with archival multi-wavelength data for a sample of 52 AGN host galaxies at z $<0.2$. We carried out sub-mm observations using the SCUBA-2 camera at the James Clerk Maxwell Telescope, and obtained flux or an upper limit at 450 and 850 $μ$m for each target. By experimenting the effect of the AGN dust component in the SED fit, we find that dust luminosity can be overestimated if AGN contribution is ignored. While the SFR based on 4000Å break shows a significant offset compared to dust luminosity based SFR, the SFR obtained by the artificial neural network (Ellison et al. 2016) generally shows consistency albeit with a large scatter. We find that SFR correlates with AGN outflow strength manifested by the [OIII] $λ5007$ emission line, and that AGNs with higher Eddington ratios and stronger outflows are in general hosted by galaxies with higher SFR, which is consistent with the correlation reported by Woo et al. (2020). This suggests no instantaneous quenching of star formation due to AGN feedback.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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