A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE): Broad-line AGN at $z=4-5$ revealed by JWST/NIRCam WFSS
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2024
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| author | Lin, Xiaojing Wang, Feige Fan, Xiaohui Cai, Zheng Champagne, Jaclyn B. Sun, Fengwu Volonteri, Marta Yang, Jinyi Hennawi, Joseph F. Bañados, Eduardo Barth, Aaron Eilers, Anna-Christina Farina, Emanuele Paolo Liu, Weizhe Jin, Xiangyu Jun, Hyunsung D. Lupi, Alessandro Kakiichi, Koki Mazzucchelli, Chiara Onoue, Masafusa Pan, Zhiwei Pizzati, Elia Rojas-Ruiz, Sofía Schindler, Jan-Torge Trakhtenbrot, Benny Shen, Yue Trebitsch, Maxime Zhuang, Ming-Yang Endsley, Ryan Meyer, Romain A. Li, Zihao Li, Mingyu Pudoka, Maria Tee, Wei Leong Wu, Yunjing Zhang, Haowen |
| author_facet | Lin, Xiaojing Wang, Feige Fan, Xiaohui Cai, Zheng Champagne, Jaclyn B. Sun, Fengwu Volonteri, Marta Yang, Jinyi Hennawi, Joseph F. Bañados, Eduardo Barth, Aaron Eilers, Anna-Christina Farina, Emanuele Paolo Liu, Weizhe Jin, Xiangyu Jun, Hyunsung D. Lupi, Alessandro Kakiichi, Koki Mazzucchelli, Chiara Onoue, Masafusa Pan, Zhiwei Pizzati, Elia Rojas-Ruiz, Sofía Schindler, Jan-Torge Trakhtenbrot, Benny Shen, Yue Trebitsch, Maxime Zhuang, Ming-Yang Endsley, Ryan Meyer, Romain A. Li, Zihao Li, Mingyu Pudoka, Maria Tee, Wei Leong Wu, Yunjing Zhang, Haowen |
| contents | Low-luminosity AGNs with low-mass black holes (BHs) in the early universe are fundamental to understanding the BH growth and their co-evolution with the host galaxies. Utilizing JWST NIRCam Wide Field Slitless Spectroscopy (WFSS), we perform a systematic search for broad-line ${\rm Hα}$ emitters (BHAEs) at $z\approx 4-5$ in 25 fields of the ASPIRE (A SPectroscopic survey of biased halos In the Reionization Era) project, covering a total area of 275 arcmin$^2$. We identify 16 BHAEs with FWHM of the broad components spanning from $\sim$ 1000 km s$^{-1}$ to 3000 km s$^{-1}$. Assuming the broad linewidths arise due to Doppler broadening around BHs, the implied BH masses range from $10^7$ to $10^{8}~M_\odot$, with broad ${\rm Hα}$-converted bolometric luminosity of $10^{44.5}-10^{45.5}$ erg s$^{-1}$ and Eddington ratios of $0.07-0.47$. The spatially extended structure of the F200W stacked image may trace the stellar light from the host galaxies. The ${\rm Hα}$ luminosity function indicates an increasing AGN fraction towards the higher ${\rm Hα}$ luminosities. We find possible evidence for clustering of BHAEs: two sources are at the same redshift with a projected separation of 519 kpc; one BHAE appears as a composite system residing in an overdense region with three close companion ${\rm Hα}$ emitters. Three BHAEs exhibit blueshifted absorption troughs indicative of the presence of high-column-density gas. We find the broad-line and photometrically selected BHAE samples exhibit different distributions in the optical continuum slopes, which can be attributed to their different selection methods. The ASPIRE broad-line ${\rm Hα}$ sample provides a good database for future studies of faint AGN populations at high redshift. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_17570 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE): Broad-line AGN at $z=4-5$ revealed by JWST/NIRCam WFSS Lin, Xiaojing Wang, Feige Fan, Xiaohui Cai, Zheng Champagne, Jaclyn B. Sun, Fengwu Volonteri, Marta Yang, Jinyi Hennawi, Joseph F. Bañados, Eduardo Barth, Aaron Eilers, Anna-Christina Farina, Emanuele Paolo Liu, Weizhe Jin, Xiangyu Jun, Hyunsung D. Lupi, Alessandro Kakiichi, Koki Mazzucchelli, Chiara Onoue, Masafusa Pan, Zhiwei Pizzati, Elia Rojas-Ruiz, Sofía Schindler, Jan-Torge Trakhtenbrot, Benny Shen, Yue Trebitsch, Maxime Zhuang, Ming-Yang Endsley, Ryan Meyer, Romain A. Li, Zihao Li, Mingyu Pudoka, Maria Tee, Wei Leong Wu, Yunjing Zhang, Haowen Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics Low-luminosity AGNs with low-mass black holes (BHs) in the early universe are fundamental to understanding the BH growth and their co-evolution with the host galaxies. Utilizing JWST NIRCam Wide Field Slitless Spectroscopy (WFSS), we perform a systematic search for broad-line ${\rm Hα}$ emitters (BHAEs) at $z\approx 4-5$ in 25 fields of the ASPIRE (A SPectroscopic survey of biased halos In the Reionization Era) project, covering a total area of 275 arcmin$^2$. We identify 16 BHAEs with FWHM of the broad components spanning from $\sim$ 1000 km s$^{-1}$ to 3000 km s$^{-1}$. Assuming the broad linewidths arise due to Doppler broadening around BHs, the implied BH masses range from $10^7$ to $10^{8}~M_\odot$, with broad ${\rm Hα}$-converted bolometric luminosity of $10^{44.5}-10^{45.5}$ erg s$^{-1}$ and Eddington ratios of $0.07-0.47$. The spatially extended structure of the F200W stacked image may trace the stellar light from the host galaxies. The ${\rm Hα}$ luminosity function indicates an increasing AGN fraction towards the higher ${\rm Hα}$ luminosities. We find possible evidence for clustering of BHAEs: two sources are at the same redshift with a projected separation of 519 kpc; one BHAE appears as a composite system residing in an overdense region with three close companion ${\rm Hα}$ emitters. Three BHAEs exhibit blueshifted absorption troughs indicative of the presence of high-column-density gas. We find the broad-line and photometrically selected BHAE samples exhibit different distributions in the optical continuum slopes, which can be attributed to their different selection methods. The ASPIRE broad-line ${\rm Hα}$ sample provides a good database for future studies of faint AGN populations at high redshift. |
| title | A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE): Broad-line AGN at $z=4-5$ revealed by JWST/NIRCam WFSS |
| topic | Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2407.17570 |