J/MNRAS/492/4680 Ionized gas outflow signatures in MaNGA AGN (Wylezalek+, 2020)
Ionized gas outflow signatures in SDSS-IV MaNGA active galactic nuclei.
Wylezalek D., Flores A.M., Zakamska N.L., Greene J.E., Riffel R.A.
<Mon. Not. R. Astron. Soc., 492, 4680-4696 (2020)>
=2020MNRAS.492.4680W 2020MNRAS.492.4680W (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Galaxies, spectra ; Redshifts ; Optical
Keywords: techniques: imaging spectroscopy - techniques: spectroscopic -
galaxies: active
Abstract:
The prevalence of outflow and feedback signatures in active galactic
nuclei (AGNs is a major unresolved question which large integral field
unit (IFU) surveys now allow to address. In this paper, we present a
kinematic analysis of the ionized gas in 2778 galaxies at z∼0.05
observed by Sloan Digital Sky Survey-IV (SDSS-IV) Mapping Nearby
Galaxies at Apache Point Observatory (MaNGA). Specifically, we measure
the kinematics of the [OIII]λ5007Å emission line in each
spatial element and fit multiple Gaussian components to account for
possible non-gravitational motions of gas. Comparing the kinematics of
the ionized gas between 308 MaNGA-selected AGNs that have been
previously identified through emission-line diagnostics and sources
not classified as AGN, we find that while 25 per cent of
MaNGA-selected AGN show [OIII] components with emission-line widths of
>500km/s in more than 10 per cent of their spaxels, only 7 per cent of
MaNGA non-AGNs show a similar signature. Even the AGNs that do not
show nuclear AGN photoionization signatures and that were only
identified as AGN based on their larger scale photoionization
signatures show similar kinematic characteristics. In addition to
obscuration, another possibility is that outflow and mechanical
feedback signatures are longer lived than the AGN itself. Our
measurements demonstrate that high velocity gas is more prevalent in
AGN compared to non-AGN and that outflow and feedback signatures in
low-luminosity, low-redshift AGN may so far have been underestimated.
We show that higher luminosity MaNGA-selected AGNs are able to drive
larger scale outflows than lower luminosity AGN. But estimates of the
kinetic coupling efficiencies are ≪1 per cent and suggest that the
feedback signatures probed in this paper are unlikely to have a
significant impact on the AGN host galaxies. However, continuous
energy injection may still heat a fraction of the cool gas and delay
or suppress star formation in individual galaxies even when the AGN is
weak.
Description:
MaNGA is a spectroscopic survey as part of the SDSS-IV. MaNGA is a
two-dimensional spectroscopic survey that uses IFU observations to
take multiple spectral observations of each galaxy in the
3600-10000Å range using the BOSS Spectrograph (Gunn et al.
2006AJ....131.2332G 2006AJ....131.2332G; Smee et al. 2013AJ....146...32S 2013AJ....146...32S) at R∼2000. The
current data release DR14 (Abolfathi et al. 2018ApJS..235...42A 2018ApJS..235...42A)
contains 2778 galaxies at 0.01<z<0.15 with a mean z∼0.05.
The aim of this work is to compare the kinematic characteristics of
the [OIII] emission line for MaNGA-selected AGN and non-AGN in the
MaNGA sample. Wylezalek et al. (2018MNRAS.474.1499W 2018MNRAS.474.1499W) recently
developed spatially resolved techniques for identifying signatures of
AGN tailored to MaNGA IFU data identifying 303 AGN candidates. A minor
update to the selection code has increased the sample to 308 sources
which we adopt as the 'AGN' sample in this work (see Table 1).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 120 2778 Mean and 75th percentile [OIII] velocity width
measurements <W80> and W80,75th of all
MaNGA galaxies analysed in this work
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See also:
J/ApJS/262/36 : SDSS-IV MaNGA: pyPipe3D data for 10000 galaxies
(Sanchez+, 2022)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Galaxy name from MaNGA (NN-NNNNNN)
11- 24 F14.10 deg RAdeg Right ascension (J2000)
26- 43 F18.15 deg DEdeg Declination (J2000)
45- 54 F10.8 --- z Redshift
56- 74 F19.14 km/s W80 ? Mean [OIII] velocity width measurement
76- 94 F19.14 km/s W8075p ? 75th percentile [OIII] velocity width
measurement
96-116 F21.19 --- fspx ?=0.0 Fraction of spaxels with high S/N [OIII]
emission-line measurements (S/N>10)
118 I1 --- fAGN [0/1] Flag indicating whether the source is
identified as a MaNGA-selected AGN (1)
120 I1 --- ftype [0/4] Flag indicating the AGN's type (2)
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Note (1): Flag as follows:
0 = MaNGA-selected AGN (2470/2778)
1 = MaNGA non-AGN (308/2778)
Note (2): Flag as follows:
0 = MaNGA non-AGN or unclassified galaxy (2494/2778)
2 = Star-forming galaxy (109/2778)
3 = LINER-AGN (91/2778)
4 = Seyfert-AGN (84/2778)
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 29-Mar-2023