The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX). III. A Red Quasar with Extremely High Equivalent Widths Showing Powerful Outflows

Liu, Chenxu; Gebhardt, Karl; Kollatschny, Wolfram; Ciardullo, Robin; Cooper, Erin Mentuch; Davis, Dustin; Farrow, Daniel J. J.; Finkelstein, Steven L. L.; Gawiser, Eric; Gronwall, Caryl; Hill, Gary J. J.; House, Lindsay; Schneider, Donald P. P.; Urrutia, Tanya und Zeimann, Gregory R. R. (2022): The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX). III. A Red Quasar with Extremely High Equivalent Widths Showing Powerful Outflows. In: Astrophysical Journal, Bd. 940, Nr. 1, 40

Abstract

We report an active galactic nucleus (AGN) with an extremely high equivalent width (EW), EWLy alpha+N V,rest greater than or similar to 921 angstrom, in the rest frame, at z similar to 2.24 in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX), as a representative case of the high-EW AGN population. The continuum level is a nondetection in the HETDEX spectrum;thus the measured EW is a lower limit. The source is detected with significant emission lines (>7 sigma) at Ly alpha + N v lambda 1241, C iv lambda 1549, and a moderate emission line (similar to 4 sigma) at He ii lambda 1640 within the wavelength coverage of HETDEX (3500-5500 angstrom). The r-band magnitude is 24.57 from the Hyper Suprime-Cam-HETDEX joint survey with a detection limit of r = 25.12 at 5 sigma. The Ly alpha emission line spans a clearly resolved region of similar to 10 '' (85 kpc) in diameter. The Ly alpha line profile is strongly double peaked. The spectral decomposed blue gas and red gas Ly alpha emission are separated by similar to 1.'' 2 (10.1 kpc) with a line-of-sight velocity offset of similar to 1100 km s(-1). This source is probably an obscured AGN with powerful winds.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0004-637X
• Sprache: Englisch