Journal article
Exploring the Spectral Energy Distributions of Luminous Broad Absorption Line Quasars at High Redshift
The Astrophysical journal, v 985(2), 207
01 Jun 2025
Abstract
We present the multiwavelength spectral energy distributions (SEDs) for 65 luminous broad absorption line (BAL) quasars with redshifts 1.55 ≲ z ≲ 3.50 from the Gemini Near Infrared Spectrograph–Distant Quasar Survey (GNIRS-DQS). We integrate data from a variety of ground- and space-based observatories to construct a comprehensive spectral profile of these objects from radio through X-rays. In addition, we present a mid-infrared to X-ray composite SED of these sources. Our data set represents the most uniform sample of BAL quasars, providing a statistically robust set of SEDs. Our findings indicate that the BAL quasars in the GNIRS-DQS sample exhibit significant reddening in the ultraviolet-optical continuum relative to their non-BAL counterparts, consistent with previous studies. Notably, our analysis reveals no significant differences in the mid- or near-infrared spectral regime between BAL and non-BAL quasars. In line with previous work, we find no strong evidence that BAL and non-BAL quasars possess fundamentally different SEDs, also consistent with recent findings that both groups display similar rest-frame optical emission-line properties.
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Details
- Title
- Exploring the Spectral Energy Distributions of Luminous Broad Absorption Line Quasars at High Redshift
- Creators
- Harum Ahmed - University of North Texas Department of Physics, Denton, TX 76203, USASarah C. Gallagher - Western UniversityOhad Shemmer - University of North Texas Department of Physics, Denton, TX 76203, USAMichael S. Brotherton - University of WyomingCooper Dix - The University of Texas at AustinLeigh Parrott - University of North Texas Department of Physics, Denton, TX 76203, USAGordon T. Richards - Drexel University Department of Physics, 32 S. 32nd Street, Philadelphia, PA 19104, USA
- Publication Details
- The Astrophysical journal, v 985(2), 207
- Publisher
- Institute of Physics
- Number of pages
- 22
- Grant note
- RGPIN-2021-04157 / Canadian Government ∣ Natural Sciences and Engineering Research Council of Canada (NSERC) (https://doi.org/10.13039/501100000038)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:001495160700001
- Scopus ID
- 2-s2.0-105006714584
- Other Identifier
- 991022054405904721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics