J/A+A/623/A171 Mkn 848 MaNGA 3-D data cube (Perna+, 2019)
Multi-phase outflows in Mkn 848 observed with SDSS-MaNGA integral field
spectroscopy.
Perna M., Cresci G., Brusa M., Lanzuisi G., Concas A., Mainieri V.,
Mannucci F., Marconi A.
<Astron. Astrophys. 623, A171 (2019)>
=2019A&A...623A.171P 2019A&A...623A.171P (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, spectra ; Interstellar medium
Keywords: galaxies: active - ISM: jets and outflows -
galaxies: individual: Mkn 848
Abstract:
The characterisation of galaxy-scale outflows in terms of their
multi-phase and multi-scale nature, amount, and effects of flowing
material is crucial to place constraints on models of galaxy formation
and evolution. This study can proceed only with the detailed
investigation of individual targets.
We present a spatially resolved spectroscopic optical data analysis of
Mkn 848, a complex system consisting of two merging galaxies at z∼0.04
that are separated by a projected distance of 7.5kpc. Motivated by the
presence of a multi-phase outflow in the north-west system revealed by
the SDSS integrated spectrum, we analysed the publicly available MaNGA
data, which cover almost the entire merging system, to study the
kinematic and physical properties of cool and warm gas in detail.
Galaxy-wide outflowing gas in multiple phases is revealed for the
first time in the two merging galaxies. We also detect spatially
resolved resonant NaID emission associated with the outflows. The
derived outflow energetics (mass rate, and kinetic and momentum power)
may be consistent with a scenario in which both winds are accelerated
by stellar processes and AGN activity, although we favour an AGN
origin given the high outflow velocities and the ionisation conditions
observed in the outflow regions. Further deeper multi-wavelength
observations are required, however, to better constrain the nature of
these multi-phase outflows. Outflow energetics in the north-west
system are strongly different between the ionised and atomic gas
components, the latter of which is associated with mass outflow rate
and kinetic and momentum powers that are one or two dex higher; those
associated with the south-east galaxy are instead similar.
Strong kiloparsec-scale outflows are revealed in an ongoing merger
system, suggesting that feedback can potentially impact the host
galaxy even in the early merger phases. The characterisation of the
neutral and ionised gas phases has proved to be crucial for a
comprehensive study of the outflow phenomena.
Description:
MaNGA 3-D data cube, with two spatial dimensions and one spectral
dimension. The data cube contains sky-subtracted,
spectrophotometrically calibrated spectra.
The LOGCUBE data cube has logarithmic wavelength sampling, and
0.5-arcsec spatial pixels (spaxels). It contains extensions for the
flux (in units of 10-17erg/s/cm2/Å/spaxel), inverse variance,
pixel mask, wavelength vector, median spectral resolution and standard
deviation thereof, and a binary table describing the individual
exposures that make up the file. Additional information can be found
here: https://www.sdss.org/dr13/manga/manga-data/data-model/#Cubes
Objects:
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RA (2000) DE Designation(s)
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15 18 06.12 +42 44 44.6 Mkn 848 = MaNGA 12-193481
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 135 1 Information of 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- 25 I2 --- Nx Number of pixels along X-axis
27- 28 I2 --- Ny Number of pixels along Y-axis
30- 33 I4 --- Nz Number of slices
35- 44 A10 "date" Obs.Date Observation date
46- 51 F6.1 0.1nm bWAVE Lower value of wavelength interval
53- 59 F7.2 0.1nm BWAVE Upper value of wavelength interval
61- 68 F8.6 0.1nm dWAVE Wavelength resolution
70- 74 I5 Kibyte size Size of FITS file
76-104 A29 --- FileName Name of FITS file, in subdirectory fits
106-135 A30 --- Title Title of the FITS file
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Acknowledgements:
Michele Perna, perna(at)arcetri.inaf.it
References:
Bundy, Bershady, Law et al., 2015ApJ...798....7B 2015ApJ...798....7B
Law, Cherinka, Yan et al., 2016AJ....152...83L 2016AJ....152...83L
(End) Patricia Vannier [CDS] 07-Feb-2019