Matches in SemOpenAlex for { <https://semopenalex.org/work/W3208342798> ?p ?o ?g. }
- W3208342798 endingPage "5017" @default.
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- W3208342798 abstract "ABSTRACT Giant radio galaxies provide important clues into the life cycles and triggering mechanisms of radio jets. With large-scale jets spanning 1.8 Mpc, ESO 422−G028 (z = 0.038) is a giant radio galaxy that also exhibits signs of restarted jet activity in the form of pc-scale jets. We present a study of the spatially resolved stellar and gas properties of ESO 422−G028 using optical integral field spectroscopy from the Wide-Field Spectrograph (WiFeS). In addition to the majority ${sim} 13, rm Gyr$ old stellar population, ESO 422−G028 exhibits a much younger (${lesssim} 10, rm Myr$ old) component with an estimated mass of $10^{7.6}, rm M_odot$ that is predominantly located in the north-west region of the galaxy. Unusually, the ionized gas kinematics reveal two distinct discs traced by narrow ($sigma _{rm Halpha } lt 100 , rm km, s^{-1}$) and broad ($sigma _{rm Halpha } gt 150 , rm km, s^{-1}$) Hα emission, respectively. Both ionized gas discs are misaligned with the axis of stellar rotation, suggesting an external origin. This is consistent with the prominent interstellar Na D absorption, which traces a $1 !-! 3 , rm M_odot , yr^{-1}$ inflow of neutral gas from the north. We posit that an inflow of gas – either from an accretion event or a gas-rich merger – has triggered both the starburst and the restarted jet activity, and that ESO 422−G028 is potentially on the brink of an epoch of powerful active galactic nucleus (AGN) activity." @default.
- W3208342798 created "2021-11-08" @default.
- W3208342798 creator A5003935765 @default.
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- W3208342798 creator A5028343638 @default.
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- W3208342798 creator A5087159933 @default.
- W3208342798 date "2021-11-01" @default.
- W3208342798 modified "2023-10-06" @default.
- W3208342798 title "Revisiting the giant radio galaxy ESO 422−G028 – I. Discovery of a neutral inflow and recent star formation in a restarted giant" @default.
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