J/A+A/641/A151 NGC 7213 central region molecular gas (Salvestrini+, 2020)
Molecular gas in the central region of NGC 7213.
Salvestrini F., Gruppioni C., Pozzi F., Vignali C., Giannetti A.,
Paladino R., Hatziminaoglou E.
<Astron. Astrophys. 641, A151 (2020)>
=2020A&A...641A.151S 2020A&A...641A.151S (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; X-ray sources ; Radio sources ;
Spectra, millimetric/submm
Keywords: galaxies: ISM - galaxies: Seyfert - galaxies: spiral -
galaxies: active - X-rays: galaxies
Abstract:
We present a multi-wavelength study (from X-ray to mm) of the nearby
low-luminosity active galactic nucleus (LLAGN) NGC 7213.
We combine the information from the different bands to characterise
the source in terms of contribution from the AGN and the host-galaxy
interstellar medium (ISM).
This approach allows us to provide a coherent picture of the role of
the AGN and its impact, if any, on the star formation and molecular
gas properties of the host galaxy.
We focused our study on archival ALMA Cycle 1 observations, where the
CO(2-1) emission line has been used as a tracer of the molecular gas.
Using the 3DBarolo code on ALMA data, we performed the modelling of
the molecular gas kinematics traced by the CO(2-1) emission, finding a
rotationally dominated pattern.
The molecular gas mass of the host galaxy was estimated from the
integrated CO(2-1) emission line obtained with APEX data, assuming an
alpha_co conversion factor.
Had we used the ALMA data, we would have underestimated the gas masses
by a factor ∼3, given the filtering out of the large-scale emission in
interferometric observations.
We also performed a complete X-ray spectral analysis on archival
observations, revealing a relatively faint and unobscured AGN.
The AGN proved to be too faint to significantly affect the properties
of the host galaxy, such as star formation activity and molecular gas
kinematics and distribution.
Description:
Reduced datacube (ALMA) and spectra (APEX, NuSTAR, XMM-Newton) of
NGC 7213. Data were analysed with the aim of provising a complete
picture the interplay between the nuclear activity and the host-galaxy
star formation. Details about the calibration procedures for each
dataset are provided in the dedicated sections of the paper
Objects:
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RA (2000) DE Designation(s)
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22 09 16.21 -47 10 00.1 NGC 7213 = 1RXS J220916.6-471002
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig4.dat 19 82 CO(2-1) line profile from APEX
list.dat 150 22 List of fits files
fits/* . 22 Individual fits files
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Byte-by-byte Description of file: fig4.dat
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Bytes Format Units Label Explanations
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1- 7 F7.2 km/s Vel Velocity
10- 19 E10.6 K Ta Antenna temperature
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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- 23 I4 --- Nx Number of pixels along X-axis
25- 28 I4 --- Ny ? Number of pixels along Y-axis
30- 31 I2 --- Nz ? Number of slices, for the datacube
33- 55 A23 "datime" Obs.date Observation date
57- 61 I5 Kibyte size Size of FITS file
63-101 A39 --- FileName Name of FITS file, in subdirectory fits
103-150 A48 --- Title Title of the FITS file
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Acknowledgements:
Francesco Salvestrini, francesc.salvestrin2(at)unibo.it
(End) Francesco Salvestrini [Bologna, Italy], Patricia Vannier [CDS] 28-Aug-2020