J/A+A/619/A83 MURALES survey. I. 3C 459 data cube. (Balmaverde+, 2018)
The MURALES survey. I. A dual AGN in the radio galaxy 3C 459?
Balmaverde B., Capetti A., Marconi A., Venturi G., Chiaberge M.,
Baldi R.D., Baum S., Gilli R., Grandi P., Meyer E., Miley G., O'Dea C.,
Sparks W., Torresi E., Tremblay G.
<Astron. Astrophys. 619, A83 (2018)>
=2018A&A...619A..83B 2018A&A...619A..83B (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei
Keywords: galaxies: active - galaxies: nuclei - galaxies: star formation -
galaxies: jets
Abstract:
We observed the FR II radio galaxy 3C 459 (z=0.22) with the MUSE
spectrograph at the Very Large Telescope (VLT) as part of the MURALES
project (a MUse RAdio Loud Emission line Snapshot survey). We detected
diffuse nuclear emission and a filamentary ionized gas structure
forming a one-sided, triangular-shaped region extending out to ∼80kpc.
The central emission line region is dominated by two compact knots of
similar flux: the first (N1) cospatial with the radio core and the
(N2) second located 1.2" (5.3kpc) to the SE. The two regions differ
dramatically from the point of view of velocity (with an offset of
∼400km/s), line widths, and line ratios. This suggests that we are
observing a dual AGN system formed by a radio loud AGN and type 2 QSO
companion, which is the result of the recent merger that also produced
its disturbed host morphology. The alternative possibility that N2 is
just a bright emission line knot resulting from, for example, a
jet-cloud interaction, is disfavored because of 1) the presence of a
high ionization bicone whose apex is located at N2; 2) the observed
narrow line widths; 3) its line luminosity (∼1042erg/s) typical of
luminous QSOs; and 4) its location, which is offset from the jet path.
The putative secondary AGN must be highly obscured, since we do not
detect any emission in the Chandra and infrared Hubble Space Telescope
images.
Description:
Combined datacube from OBJECT observations for the programme
099.B-0137(A), "The MURALES survey: a MUse RAdio Loud Emission lines
Snapshot." The data have been reduced with the MUSE pipeline, as
described in the paper.
Objects:
-----------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------
23 16 35.232 +04 05 18.06 3C459 = 3C 459
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 101 1 Information on fits datacube
fits/* . 1 Fits 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- 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 pixels along Z-axis
37- 43 F7.2 0.1nm bWave Lower value of wavelength interval
45- 51 F7.2 0.1nm BWave Upper value of wavelength interval
53- 56 F4.2 0.1nm dWave Wavelength resolution
58- 63 I6 Kibyte size Size of FITS file
65- 77 A13 --- FileName Name of FITS file, in subdirectory fits
79-101 A23 --- Title Title of the FITS file
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Acknowledgements:
Barbara Balmaverde, balmaverde(at)oato.inaf.it
(End) Barbara Balmaverde [OAB, Italy], Patricia Vannier [CDS] 20-Aug-2018