2019A&A...621A..83S


Query : 2019A&A...621A..83S

2019A&A...621A..83S - Astronomy and Astrophysics, volume 621A, 83-83 (2019/1-1)

Outflows in the inner kiloparsec of NGC 1566 as revealed by molecular (ALMA) and ionized gas (Gemini-GMOS/IFU) kinematics.

SLATER R., NAGAR N.M., SCHNORR-MULLER A., STORCHI-BERGMANN T., FINLEZ C., LENA D., RAMAKRISHNAN V., MUNDELL C.G., RIFFEL R.A., PETERSON B., ROBINSON A. and ORELLANA G.

Abstract (from CDS):


Context. Tracing nuclear inflows and outflows in active galactic nuclei (AGNs), determining the mass of gas involved in them, and their impact on the host galaxy and nuclear black hole requires 3D imaging studies of both the ionized and molecular gas.
Aims. We map the distribution and kinematics of molecular and ionized gas in a sample of active galaxies to quantify the nuclear inflows and outflows. Here, we analyze the nuclear kinematics of NGC 1566 via ALMA observations of the CO J:2-1 emission at 24pc spatial and ∼2.6km/s spectral resolution, and Gemini-GMOS/IFU observations of ionized gas emission lines and stellar absorption lines at similar spatial resolution, and 123km/s of intrinsic spectral resolution.
Methods. The morphology and kinematics of stellar, molecular (CO), and ionized ([NII]) emission lines are compared to the expectations from rotation, outflows, and streaming inflows.
Results. While both ionized and molecular gas show rotation signatures, there are significant non-circular motions in the innermost 200pc and along spiral arms in the central kpc (CO). The nucleus shows a double-peaked CO profile (full width at zero intensity of 200km/s), and prominent (∼80km/s) blue- and redshifted lobes are found along the minor axis in the inner arcseconds. Perturbations by the large-scale bar can qualitatively explain all features in the observed velocity field. We thus favor the presence of a molecular outflow in the disk with true velocities of ∼180km/s in the nucleus and decelerating to 0 by ∼72pc. The implied molecular outflow rate is 5.6M/yr, with this gas accumulating in the nuclear 2" arms. The ionized gas kinematics support an interpretation of a similar but more spherical outflow in the inner 100pc, with no signs of deceleration. There is some evidence of streaming inflows of ∼50km/s along specific spiral arms, and the estimated molecular mass inflow rate, ∼0.1M/yr, is significantly higher than the SMBH accretion rate (m=4.8x10–5M/yr).

Abstract Copyright: © ESO 2019

Journal keyword(s): galaxies: nuclei - galaxies: active - galaxies: kinematics and dynamics - galaxies: Seyfert

VizieR on-line data: <Available at CDS (J/A+A/621/A83): gen.dat kin.dat list.dat fits/*>

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 M 77 GiP 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4332 2
2 NGC 1566 Sy1 04 20 00.3968473248 -54 56 16.624708764 10.29 10.19 9.73 9.21 10.1 ~ 799 2
3 NAME NGC 1566 Group GrG 04 20 00.6 -54 56 17           ~ 141 0
4 NAME Pic A Sy1 05 19 49.7229323856 -45 46 43.852662732   15.73 15.77 14.85   ~ 605 1
5 NGC 2110 Sy2 05 52 11.3768668776 -07 27 22.507465392   14.77 13.51 11.86   ~ 628 1
6 NGC 2976 GiP 09 47 15.458 +67 54 58.97 11.77 11.03 10.16 9.51   ~ 624 1

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2022.06.26-07:46:03

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