J/A+A/622/A128 SINFONI datacube of NGC 1365 (Fazeli+, 2019)
Near-infrared observations of star formation and gas flows in the NUGA galaxy
NGC 1365.
Fazeli N., Busch G., Valencia-S. M., Eckart A., Zajacek M., Combes F.,
Garcia-Burillo S.
<Astron. Astrophys. 622, A128 (2019)>
=2019A&A...622A.128F 2019A&A...622A.128F (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, Seyfert ; Photometry, infrared
Keywords: galaxies: active - galaxies: Seyfert - galaxies: nuclei -
galaxies: kinematics and dynamics - infrared: galaxies -
galaxies: star formation
Abstract:
In the framework of understanding the gas and stellar kinematics and
their relations to AGNs and galaxy evolution scenarios, we present
spatially resolved distributions and kinematics of the stars and gas
in the central ∼800-pc radius of the nearby Seyfert galaxy NGC 1365.
We obtained H + K- and K-band near-infrared (NIR) integral-field
observations from VLT/SINFONI. Our results reveal strong broad and
narrow emission-line components of ionized gas (hydrogen recombination
lines Paα and Brγ) in the nuclear region, as well as hot
dust with a temperature of ∼1300K, both typical for type-1 AGNs.
From MBH-σ* and the broad components of hydrogen
recombination lines, we find a black-hole mass of
(5-10)x106M☉. In the central ∼800pc, we find a hot molecular
gas mass of ∼615M , which corresponds to a cold molecular gas
reservoir of (2-8)x108M☉. However, there is a molecular gas
deficiency in the nuclear region. The gas and stellar-velocity maps
both show rotation patterns consistent with the large-scale rotation
of the galaxy. However, the gaseous and stellar kinematics show
deviations from pure disk rotation, which suggest streaming motions in
the central <200pc and a velocity twist at the location of the ring
which indicates deviations in disk and ring rotation velocities in
accordance with published CO kinematics. We detect a blueshifted
emission line split in Paα, associated with the nuclear region
only. We investigate the star-formation properties of the hot spots in
the circumnuclear ring which have starburst ages of 10Myr and find
indications for an age gradient on the western side of the ring. In
addition, our high-resolution data reveal further substructure within
this ring which also shows enhanced star forming activity close to the
nucleus.
Description:
Central kiloparsec of the galaxy NGC 1365 observed with Spectrograph
for INtegral Field Observations in the Near Infrared (SINFONI) using
H+K grating. The data cube contains a 100x100 pixels image with the
spectra of each pixel. The flux is in arbitrary units.
All the necessary information can be found in the header of the FITs
file.
Objects:
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RA (2000) DE Designation(s)
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03 33 36.46 -36 08 26.4 NGC 1365 = MRC 0331-363
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 250 1 Information on datacube
fits/* . 1 Datacube
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See also:
J/A+A/295/585 : CO observations in NGC 1365 (Sandqvist+, 1995)
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 I3 --- Nx Number of pixels along X-axis
24- 26 I3 --- Ny Number of pixels along Y-axis
28- 31 I4 --- Nz Number of pixels along Z-axis
33- 56 A24 "datime" Obs.date Observation date
58- 63 F6.4 um bWAVE Lower value of wavelength interval
65- 69 F5.3 um BWAVE Upper value of wavelength interval
71- 76 F6.4 um dWAVE Wavelenght resolution
78- 83 I6 Kibyte size Size of FITS file
85-100 A16 --- FileName Name of FITS file, in subdirectory fits
102-250 A149 --- Title Title of the FITS file
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Acknowledgements:
Nastaran Fazeli, fazeli(at)ph1.uni-koeln.de
(End) Patricia Vannier [CDS] 15-Jan-2019