Near-infrared Hydrogen and Helium QSO Emission Lines

We present 14 near-infrared (NIR) quasar spectra observed with the Flamingos-2 NIR spectrometer instrument at the Gemini South Observatory. The targets were selected with redshifts of (0.58 ≤ z ≤ 0.63) to ensure the spectral wavelength range included specifically identified hydrogen and helium broad...

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Bibliographic Details
Published inThe Astronomical journal Vol. 158; no. 3; pp. 129 - 136
Main Authors Kenyon, C. E. G., Labrie, K., Webster, R. L., King, A. L.
Format Journal Article
LanguageEnglish
Published Madison The American Astronomical Society 01.09.2019
IOP Publishing
Subjects
Astronomy
Emission lines
Emission measurements
Galactic evolution
Galaxies
Gas density
Helium
Hydrogen
Infrared spectra
infrared: galaxies
Near infrared radiation
Photoionization
Quasars
quasars: emission lines
quasars: general
Sky surveys (astronomy)
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Summary:We present 14 near-infrared (NIR) quasar spectra observed with the Flamingos-2 NIR spectrometer instrument at the Gemini South Observatory. The targets were selected with redshifts of (0.58 ≤ z ≤ 0.63) to ensure the spectral wavelength range included specifically identified hydrogen and helium broad emission lines. We present measurements of their FWHM, equivalent widths, and flux ratios relative to H . The quasars are all within the Sloan Digital Sky Survey (SDSS) Stripe 82 region which, then also provides multi-epoch rest-frame UV and optical spectroscopic observations of our targets. In future work, these data and those from Galaxy Evolution Explorer and NUV spectra will be utilized to constrain photoionization models to determine physical conditions within the broad emission line regions, such as the incident ionizing photon flux and gas density.
Bibliography:Galaxies and Cosmology
AAS12612
ISSN:0004-6256
1538-3881
DOI:10.3847/1538-3881/ab3a31