J/A+A/612/A19 Abell 2052 VLT/MUSE datacubes (Balmaverde+, 2018)
The VLT/MUSE view of the central galaxy in Abell 2052.
Ionized gas swept by the expanding radio source.
Balmaverde B., Capetti A., Marconi A., Venturi G.
<Astron. Astrophys. 612, A19 (2018)>
=2018A&A...612A..19B 2018A&A...612A..19B (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry
Keywords: galaxies: active - galaxies: nuclei - galaxies: clusters: general -
galaxies: clusters: individual (A2052) - galaxies: star formation -
ISM: jets and outflows
Abstract:
We report observations of the radio galaxy 3C317 (at z=0.0345) located
at the center of the Abell cluster A2052, obtained with the VLT/MUSE
integral field spectrograph. The Chandra images of this cluster show
cavities in the X-ray emitting gas, which were produced by the
expansion of the radio lobes inflated by the active galactic nucleus
(AGN). Our exquisite MUSE data show with unprecedented detail the
complex network of line emitting filaments enshrouding the northern
X-ray cavity. We do not detect any emission lines from the southern
cavity, with a luminosity asymmetry between the two regions higher
than ∼75. The emission lines produced by the warm phase of the
interstellar medium (WIM) enable us to obtain unique information on
the properties of the emitting gas. We find dense gas (up to
270cm-3) that makes up part of a global quasi spherical outflow that
is driven by the radio source, and obtain a direct estimate of the
expansion velocity of the cavities (265km/s). The emission lines
diagnostic rules out ionization from the AGN or from star-forming
regions, suggesting instead ionization from slow shocks or from cosmic
rays. The striking asymmetric line emission observed between the two
cavities contrasts with the less pronounced differences between the
north and south sides in the hot gas; this represents a significant
new ingredient for our understanding of the process of the exchange of
energy between the relativistic plasma and the external medium. We
conclude that the expanding radio lobes displace the hot tenuous phase
of the interstellar medium (ISM), but also impact the colder and
denser ISM phases. These results show the effects of the AGN on its
host and the importance of radio mode feedback.
Description:
Combined datacube from OBJECT observations (with the SKY observation
subtracted) for the programme 097.B-0766(A), "The AGN/clusters
feedback: a direct measurement of the expansion speed of the X-rays
cavities." The data have been reduced with the MUSE pipeline, as
described in the paper.
Objects:
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RA (2000) DE Designation(s)
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15 16 45.5 +07 00 01 A2052 = Abell 2052
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 165 1 Information on fits image
fits/* . 1 Fits image
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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- 22 F3.1 arcsec/pix scale Scale of the image
24- 26 I3 --- Nx Number of pixels along X-axis
28- 30 I3 --- Ny Number of pixels along Y-axis
32- 35 I4 --- Nz Number of slices
37- 59 A23 --- Obs.date Observation date (YYYY-MM-DDThh:mm:ss.sss)
61- 67 F7.2 0.1nm blambda Lower value of wavelength interval
69- 75 F7.2 0.1nm Blambda Lower value of wavelength interval
77- 80 F4.2 0.1nm dlambda Spectral resolution
82- 88 I7 Kibyte size Size of FITS file
90-119 A30 --- FileName Name of FITS file, in subdirectory fits
121-165 A45 --- Title Title of the FITS file
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Acknowledgements:
Barbara Balmaverde, balmaverde(at)oato.inaf.it
(End) Barbara Balmaverde [SNS, Italy], Patricia Vannier [CDS] 24-Jan-2018