Preprint
Exploring the Spectral Energy Distributions of Luminous Broad Absorption Line Quasars at High Redshift
04 Apr 2025
Abstract
We present the multiwavelength spectral energy distributions (SEDs) for 65
luminous broad absorption line (BAL) quasars with redshifts $1.55 \lesssim z
\lesssim 3.50$ 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 dataset 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 - U. North TexasSarah C Gallagher - U. Western OntarioOhad Shemmer - U. North TexasMichael S Brotherton - U. WyomingCooper Dix - U. Texas at AustinLeigh Parrott - U. North TexasGordon T Richards - Drexel U
- Resource Type
- Preprint
- Language
- English
- Academic Unit
- Physics
- Other Identifier
- 991022047146404721