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Warm molecular and ionized gas kinematics in the Type-2 quasar J0945+1737
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Warm molecular and ionized gas kinematics in the Type-2 quasar J0945+1737
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Warm molecular and ionized gas kinematics in the Type-2 quasar J0945+1737
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Paper
Warm molecular and ionized gas kinematics in the Type-2 quasar J0945+1737
2022
Overview
We analyze Near-Infrared Integral Field Spectrograph (NIFS) observations of the type-2 quasar (QSO2) SDSS J094521.33+173753.2 to investigate its warm molecular and ionized gas kinematics. This QSO2 has a bolometric luminosity of 10\\(^{45.7}\\) erg s\\(^{-1}\\) and a redshift of z = 0.128. The K-band spectra provided by NIFS cover a range of 1.99-2.40 \\(\\mu\\)m where low-ionization (Pa\\(\\alpha\\) and Br\\(\\delta\\)), high ionization ([S XI]\\(\\lambda\\)1.920 \\(\\mu\\)m and [Si~VI]\\(\\lambda\\)1.963 \\(\\mu\\)m) and warm molecular lines (from H\\(_2\\) 1-0S(5) to 1-0S(1)) are detected, allowing us to study the multi-phase gas kinematics. Our analysis reveals gas in ordinary rotation in all the emission lines detected and also outflowing gas in the case of the low- and high-ionization emission lines. In the case of the nuclear spectrum, which corresponds to a circular aperture of 0.3\\arcsec~(686 pc) in diameter, the warm molecular lines can be characterized using a single Gaussian component of full width at half maximum (FWHM)= 350-400 km s\\(^{-1}\\), while Pa\\(\\alpha\\), Br\\(\\delta\\), and [Si~VI] are best fitted with two blue-shifted Gaussian components of FWHM\\(\\sim\\)800 and 1700 km s\\(^{-1}\\), in addition to a narrow component of \\(\\sim\\)300 km s\\(^{-1}\\). We interpret the blue-shifted broad components as outflowing gas, which reaches the highest velocities, of up to \\(-\\)840 km s\\(^{-1}\\), in the south-east direction (PA\\(\\sim\\)125\\(^{\\circ}\\)), extending up to a distance of \\(\\sim\\)3.4 kpc from the nucleus. The ionized outflow has a maximum mass outflow rate of \\(\\dot{\\text{{M}}}_{\\text{{out, max}}}\\)=42-51 M\\(_\\odot\\) yr\\(^{-1}\\), and its kinetic power represents 0.1\\(\\%\\) of the quasar bolometric luminosity.
Publisher
Cornell University Library, arXiv.org
Subject
