J/A+A/644/A15 MUSE data for MR 2251-178 and PG 1126-041 (Marasco+, 2020)
Galaxy-scale ionised winds driven by ultra-fast outflows in two nearby quasars.
Marasco A., Cresci G., Nardini E., Mannucci F., Marconi A., Tozzi P.,
Tozzi G., Amiri A., Venturi G., Piconcelli E., Lanzuisi G., Tombesi F.,
Mingozzi M., Perna M., Carniani S., Brusa M., di Serego Alighieri S.
<Astron. Astrophys. 644, A15 (2020)>
=2020A&A...644A..15M 2020A&A...644A..15M (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; Galaxies, nearby ; Spectroscopy ; Optical
Keywords: quasars: individual: MR 2251-178 - quasars: individual: PG 1126-041 -
ISM: jets and outflows - techniques: imaging spectroscopy -
galaxies: ISM
Abstract:
We use MUSE adaptive optics (AO) data in Narrow Field Mode to study
the properties of the ionised gas in MR 2251-178 and PG 1126-041, two
nearby (z∼0.06) bright quasars hosting sub-pc scale Ultra Fast
Outflows (UFOs) detected in the X-ray band. We decompose the optical
emission from diffuse gas into a low- and a high-velocity components.
The former is characterised by a clean, regular velocity field and a
low (∼80 km/s) velocity dispersion. It traces regularly rotating gas
in PG 1126-041, while in MR 2251-178 it is possibly associated to
tidal debris from a recent merger or flyby. The other component is
found to be extended up to a few kpc from the nuclei, and shows a high
(∼800km/s) velocity dispersion and a blue-shifted mean velocity, as
expected from AGN-driven outflows. We estimate mass outflow rates up
to a few Mo/yr and kinetic efficiencies between 0.1-0.4 per cent, in
line with those of galaxies hosting AGNs of similar luminosity. The
momentum rates of these ionised outflows are comparable to those
measured for the UFOs at sub-pc scales, consistent with a
momentum-driven wind propagation. Pure energy-driven winds are
excluded unless about 100x additional momentum is locked in massive
molecular winds. By comparing the outflow properties of our sources
with those of a small sample of well-studied QSOs hosting UFOs from
the literature, we find that winds seem to systematically lie either
in a momentum-driven or in an energy-driven regime, indicating that
these two theoretical models bracket very well the physics of
AGN-driven winds.
Description:
Reduced MUSE (AO-NFM) datacubes for MR 2251-178 and PG 1126-041.
Original data were collected on 8 May 2019, 4 Aug. 2019 and 6 Aug.
2019, under program 0103.B-0762 (PI G. Cresci). The data consisted of
two Observing Blocks (OBs) for each target, for a total of eight
exposures of 480s (MR 2251-178) and 12 exposures of 460s (PG 1126-041)
each, together with four 100s sky exposures for each galaxy. The
exposures were dithered and rotated by 90deg in order to remove the
pattern produced by the 24 channels associated to each IFU, as well as
to optimize the cosmic rays removal and background subtraction. The
sky exposures were used during the data reduction to create a model of
the sky lines and sky continuum, to be subtracted from the science
exposures. The data reduction has been carried out by G. Venturi with
the MUSE pipeline v1.6, using ESO Reflex, which gives a graphical and
automated way to execute with EsoRex the Common Pipeline Library (CPL)
reduction recipes, within the Kepler workflow engine (Freudling+,
2013). Details on the MUSE AO-assisted PSFs are given in Appendix A of
the paper.
Objects:
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RA (2000) DE Designation(s)
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22 54 05.94 -17 34 53.87 MR2251-178 = MR 2251-178
11 29 16.70 -04 24 06.66 PG1126-041 = PG 1126-041
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 140 2 List of fits datacubes
fits/* . 2 Individual fits datacubes
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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- 25 F6.4 arcsec/pix scale Scale of the image
27- 29 I3 --- Nx Number of pixels along X-axis
31- 33 I3 --- Ny Number of pixels along Y-axis
35- 38 I4 --- Nz Number of slices
40- 62 A23 "datime" Obs.date Observation date
64- 70 F7.2 0.1nm bAWAV Lower value of wavelength interval
72- 78 F7.2 0.1nm BAWAV Upper value of wavelength interval
80- 83 F4.2 0.1nm dAWAV Upper Wavelength resolution
85- 91 I7 Kibyte size Size of FITS file
93-103 A11 --- FileName Name of FITS file, in subdirectory fits
105-140 A36 --- Title Title of the FITS file
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Acknowledgements:
Antonio Marasco, antonino.marasco(at)inaf.it
(End) Antonio Marasco [INAF-Arcetri Obs.], Patricia Vannier [CDS] 28-Sep-2020