Anthony J. Taylor, Steven L. Finkelstein, Dale D. Kocevski, Junehyoung Jeon, Volker Bromm, Ricardo O. Amorin, Pablo Arrabal Haro, Bren E. Backhaus, Micaela B. Bagley, Eduardo Bañados, Rachana Bhatawdekar, Madisyn Brooks, Antonello Calabro, Oscar A. Chavez Ortiz, Yingjie Cheng, Nikko J. Cleri, Justin W. Cole, Kelcey Davis, Mark Dickinson, Callum Donnan, James S. Dunlop, Richard S. Ellis, Vital Fernandez, Adriano Fontana, Seiji Fujimoto, Mauro Giavalisco, Andrea Grazian, Jingsong Guo, Nimish P. Hathi, Benne W. Holwerda, Michaela Hirschmann, Kohei Inayoshi, Jeyhan S. Kartaltepe, Yana Khusanova, Anton M. Koekemoer, Vasily Kokorev, Rebecca L. Larson, Gene C. K. Leung, Ray A. Lucas, Derek J. McLeod, Lorenzo Napolitano, Masafusa Onoue, Fabio Pacucci, Casey Papovich, Pablo G. Pérez-González, Nor Pirzkal, Rachel S. Somerville, Jonathan R. Trump, Stephen M. Wilkins, L. Y. Aaron Yung, Haowen Zhang
{"title":"Broad-Line AGN at $3.5","authors":"Anthony J. Taylor, Steven L. Finkelstein, Dale D. Kocevski, Junehyoung Jeon, Volker Bromm, Ricardo O. Amorin, Pablo Arrabal Haro, Bren E. Backhaus, Micaela B. Bagley, Eduardo Bañados, Rachana Bhatawdekar, Madisyn Brooks, Antonello Calabro, Oscar A. Chavez Ortiz, Yingjie Cheng, Nikko J. Cleri, Justin W. Cole, Kelcey Davis, Mark Dickinson, Callum Donnan, James S. Dunlop, Richard S. Ellis, Vital Fernandez, Adriano Fontana, Seiji Fujimoto, Mauro Giavalisco, Andrea Grazian, Jingsong Guo, Nimish P. Hathi, Benne W. Holwerda, Michaela Hirschmann, Kohei Inayoshi, Jeyhan S. Kartaltepe, Yana Khusanova, Anton M. Koekemoer, Vasily Kokorev, Rebecca L. Larson, Gene C. K. Leung, Ray A. Lucas, Derek J. McLeod, Lorenzo Napolitano, Masafusa Onoue, Fabio Pacucci, Casey Papovich, Pablo G. Pérez-González, Nor Pirzkal, Rachel S. Somerville, Jonathan R. Trump, Stephen M. Wilkins, L. Y. Aaron Yung, Haowen Zhang","doi":"arxiv-2409.06772","DOIUrl":null,"url":null,"abstract":"We present a sample of 50 H-alpha detected broad-line active galactic nuclei\n(BLAGN) at redshifts 3.5<z<6.8 using data from the CEERS and RUBIES surveys. We\nselect these sources directly from JWST/NIRSpec G395M/F290LP spectra. We use a\nmulti-step pre-selection and a Bayesian fitting procedure to ensure a\nhigh-quality sample of sources with broad Balmer lines and narrow forbidden\nlines. We compute rest-frame ultraviolet and optical spectral slopes for these\nobjects, and determine that 10 BLAGN in our sample are also little red dots\n(LRDs). These LRD BLAGN, when examined in aggregate, show broader H-alpha line\nprofiles and a higher fraction of broad-to-narrow component H-alpha emission\nthan non-LRD BLAGN. Moreover, we find that ~66% of these objects are\nintrinsically reddened (beta (optical)>0), independent of the contributions of\nemission lines to the broadband photometry. We construct the black hole (BH)\nmass function at 3.5<z<6 after computing robust observational and line\ndetection completeness corrections. This BH mass function shows broad agreement\nwith both recent JWST/NIRSpec and JWST/NIRCam WFSS based BH mass functions,\nthough we extend these earlier results to log(M(BH)/M(sun)) < 7. The derived BH\nmass function is consistent with a variety of theoretical models, indicating\nthat the observed abundance of black holes in the early universe is not\ndiscrepant with physically-motivated predictions. The BH mass function shape\nresembles a largely featureless power-law, suggesting that any signature from\nblack-hole seeding has been lost by redshift z~5-6. Finally, we compute the\nBLAGN UV luminosity function and find good agreement with JWST-detected BLAGN\nsamples from recent works, finding that BLAGN hosts constitute <10% of the\ntotal observed UV luminosity at all but the brightest luminosities.","PeriodicalId":501187,"journal":{"name":"arXiv - PHYS - Astrophysics of Galaxies","volume":"168 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Astrophysics of Galaxies","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.06772","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
We present a sample of 50 H-alpha detected broad-line active galactic nuclei
(BLAGN) at redshifts 3.50), independent of the contributions of
emission lines to the broadband photometry. We construct the black hole (BH)
mass function at 3.5