J/A+A/614/A94 ESO 362-G18 datacube (Humire+, 2018)
An outflow in the Seyfert ESO 362-G18 revealed by Gemini-GMOS/IFU observations.
Humire P.K., Neil N.M., Finlez C., Firpo V., Slater R., Lena D., Soto P.R.,
Munoz D., Riel R., Schmitt H.R., Kraemer S.B., Schnorr-Mueller A.,
Fischer T.C., Robinson A., Storchi-Bergmann T., Crenshaw M., Elvis M.S
<Astron. Astrophys. 614, A94 (2018)>
=2018A&A...614A..94H 2018A&A...614A..94H (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, Seyfert ; Spectrophotometry ; Optical
Keywords: galaxies: active - galaxies: individual: ESO 362-G18 -
galaxies: Seyfert - galaxies: nuclei -
galaxies: kinematics and dynamics
Abstract:
We present two-dimensional stellar and gaseous kinematics of the inner
0.7x1.2kpc2 of the Seyfert 1.5 galaxy ESO 362-G18, derived from
optical (4092-7338Å) spectra obtained with the GMOS integral field
spectrograph on the Gemini South telescope at a spatial resolution of
170 pc and spectral resolution of 36km/s. ESO 362-G18 is a strongly
perturbed galaxy of morphological type Sa or S0/a, with a minor merger
approaching along the NE direction. Previous studies have shown that
the [OIII] emission shows a fan-shaped extension of ∼10" to the SE. We
detect the [OIII] doublet, [NII] and Hα emission lines
throughout our FOV. The stellar kinematics is dominated by circular
motions in the galaxy plane, with a kinematic position angle of
∼137° and is centred approximately on the continuum peak. The gas
kinematics is also dominated by rotation, with kinematic position
angles ranging from 122° to 139°, projected velocity
amplitudes of the order of 100km/s, and a mean velocity dispersion of
100km/s. A double-Gaussian fit to the [OIII]λ5007 and Hα
lines, which have the highest signal to noise ratios of the emission
lines, reveal two kinematic components: (1) a component at lower
radial velocities which we interpret as gas rotating in the galactic
disk; and (2) a component with line of sight (LOS) velocities
100-250km/s higher than the systemic velocity, interpreted as
originating in the outflowing gas within the AGN ionization cone. We
estimate a mass outflow rate of 7.4x10-2M☉/yr in the SE
ionization cone (this rate doubles if we assume a biconical
configuration), and a mass accretion rate on the supermassive black
hole (SMBH) of 2.2x10-2M☉/yr. The total ionized gas mass
within 84pc of the nucleus is 3.3x105M☉; infall velocities of
∼34km/s in this gas would be required to feed both the outflow and
SMBH accretion.
Description:
The observations were obtained with the integral field unit of the
Gemini Multi-Object Spectrograph (GMOS-IFU) at the Gemini South
telescope on the night of December 23, 2014 (Gemini project
GS-2014B-Q-20). The observations were made in the one-slit mode of
GMOS-IFU, in which the science IFU has a field of view (hereafter FOV)
of 3.5"x5". Two pointings, shifted by 0.5" were observed so that the
total sky coverage was 4"x5" centred on the nucleus. Two exposures of
900 seconds were made at each pointing with a shift in the central
wavelength of 50Å between the two.
Objects:
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RA (2000) DE Designation(s)
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05 19 35.81 -32 39 28.0 ESO 362-G18 = ESO 362-18
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 99 1 Informations on fits datacube
fits/* . 1 Datacube
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 21 I2 --- Nx Number of pixels along X-axis
23- 24 I2 --- Ny Number of pixels along Y-axis
26- 29 I4 --- Nz Number of slices
31- 37 F7.2 0.1nm blambda Lower value of wavelength interval
39- 45 F7.2 0.1nm Blambda Upper value of wavelength interval
47- 54 F8.6 0.1nm dlambda Wavelength resolution
56- 60 I5 Kibyte size Size of FITS file
62- 70 A9 --- FileName Name of FITS file, in subdirectory fits
72- 99 A28 --- Title Title of the FITS file
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Acknowledgements:
Pedro Humire, phumire(at)udec.cl
(End) Patricia Vannier [CDS] 19-Jun-2018