학술논문
A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE): A First Look at the Rest-frame Optical Spectra of $z > 6.5$ Quasars Using JWST
Document Type
Working Paper
Author
Yang, Jinyi; Wang, Feige; Fan, Xiaohui; Hennawi, Joseph F.; Barth, Aaron J.; Bañados, Eduardo; Sun, Fengwu; Liu, Weizhe; Cai, Zheng; Jiang, Linhua; Li, Zihao; Onoue, Masafusa; Schindler, Jan-Torge; Shen, Yue; Wu, Yunjing; Bhowmick, Aklant K.; Bieri, Rebekka; Blecha, Laura; Bosman, Sarah; Champagne, Jaclyn B.; Colina, Luis; Connor, Thomas; Costa, Tiago; Davies, Frederick B.; Decarli, Roberto; De Rosa, Gisella; Drake, Alyssa B.; Egami, Eiichi; Eilers, Anna-Christina; Evans, Analis E.; Farina, Emanuele Paolo; Habouzit, Melanie; Haiman, Zoltan; Jin, Xiangyu; Jun, Hyunsung D.; Kakiichi, Koki; Khusanova, Yana; Kulkarni, Girish; Loiacono, Federica; Lupi, Alessandro; Mazzucchelli, Chiara; Pan, Zhiwei; Rojas-Ruiz, Sofía; Strauss, Michael A.; Tee, Wei Leong; Trakhtenbrot, Benny; Trebitsch, Maxime; Venemans, Bram; Vestergaard, Marianne; Volonteri, Marta; Walter, Fabian; Xie, Zhang-Liang; Yue, Minghao; Zhang, Haowen; Zhang, Huanian; Zou, Siwei
Source
Subject
Language
Abstract
Studies of rest-frame optical emission in quasars at $z>6$ have historically been limited by the wavelengths accessible by ground-based telescopes. The James Webb Space Telescope (JWST) now offers the opportunity to probe this emission deep into the reionization epoch. We report the observations of eight quasars at $z>6.5$ using the JWST/NIRCam Wide Field Slitless Spectroscopy, as a part of the ''A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE)" program. Our JWST spectra cover the quasars' emission between rest frame $\sim$ 4100 and 5100 \r{A}. The profiles of these quasars' broad H$\beta$ emission lines span a FWHM from 3000 to 6000 $\rm{km~s^{-1}}$. The H$\beta$-based virial black hole (BH) masses, ranging from 0.6 to 2.1 billion solar masses, are generally consistent with their MgII-based BH masses. The new measurements based on the more reliable H$\beta$ tracer thus confirm the existence of billion solar-mass BHs in the reionization epoch. In the observed [OIII] $\lambda\lambda$4960,5008 doublets of these luminous quasars, broad components are more common than narrow core components ($\le~1200~\rm{km~s^{-1}}$), and only one quasar shows stronger narrow components than broad. Two quasars exhibit significantly broad and blueshifted [OIII] emission, thought to trace galactic-scale outflows, with median velocities of $-610~\rm{km~s^{-1}}$ and $-1430~\rm{km~s^{-1}}$ relative to the [CII] $158\,\mu$m line. All eight quasars show strong optical FeII emission, and follow the Eigenvector 1 relations defined by low-redshift quasars. The entire ASPIRE program will eventually cover 25 quasars and provide a statistical sample for the studies of the BHs and quasar spectral properties.
Comment: 13 pages, 4 figures, accepted for publication in ApJL
Comment: 13 pages, 4 figures, accepted for publication in ApJL