J/A+A/674/A135 UMISSP - UV to Mid-Infrared SSP spectra (Vermot+, 2023)
A 3D model for the stellar populations in the nuclei of NGC 1433, NGC 1566
and NGC 1808. NIR photometry, CO absorption lines, and line-of-sight velocity
and its dispersion.
Vermot P., Palous J., Barna B., Ehlerova S., Morris M.R., Wuensch R.
<Astron. Astrophys. 674, A135 (2023)>
=2023A&A...674A.135V 2023A&A...674A.135V (SIMBAD/NED BibCode)
ADC_Keywords: Models ; Galaxies, spectra ; Ultraviolet ; Optical ; Infrared
Keywords: astronomical databases: miscellaneous -
galaxies: star clusters: general - stars: formation
Abstract:
we aim to characterize the properties of the stellar populations in
the central few hundred parsecs of nearby galactic nuclei: age, mass,
and 3D geometry.
We use spatially resolved spectroscopic observations of NGC 1433, NGC
1566 and NGC 1808 obtained with SINFONI to constrain a 3D model
composed of a spherically symmetric Nuclear Star Cluster (NSC) and an
extended thick stellar disk. We computed UV to Mid-Infrared Single
Stellar Population (UMISSP) spectra to determine the age of the
stellar populations and construct synthetic observations for our
model. To overcome usual degeneracies between key parameters, we
simultaneously fit the spatially resolved line-of-sight-velocity,
line-of-sight-velocity-dispersion, low spectral resolution NIR
continuum and high spectral resolution CO absorption features for each
pixel.
For the three objects, we derive the age and mass of the young
and old stellar populations in the NSC and surrounding disk, as well
as their 3D geometry: radius for the NSC; thickness, inclination and
position angle for the disk. These results are consistent
with published independent measurements when available.
Conclusions. The proposed method allows to derive a consistent 3D model
of the stellar populations in nearby galactic centers solely
based on a NIR IFU observation.
Description:
Spectra for 106M☉ Single Stellar Population with metallicity
ranging from -4 to 0.5, from 100 to 50000nm.
http://galaxy.asu.cas.cz/page/umisspr :
for each stellar population we provide: a) the initial mass histogram,
b) the MIST isochrone, c) the parameters of the isochrone and the ones
actually used for the spectrum attribution of each star.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 27 1071 List of spectra
sp/* . 1071 Individual spectra
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See also:
http://galaxy.asu.cas.cz/page/umisspr : UMISSPR Home Page
Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Z Metallicity
6- 10 I5 nm lambda Wavelength
14- 27 A14 --- FileName Name of the spectrum file in subdirectory sp
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Byte-by-byte Description of file: sp/*
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Bytes Format Units Label Explanations
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1- 14 E14.8 um lambda Wavelength
16- 29 E14.8 W/um spec Spectrum
31- 44 E14.8 W/um std Standard deviation over 10 realisations
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Acknowledgements:
Pierre Vermot, pierre.vermot(at)obspm.fr
(End) Patricia Vannier [CDS] 08-May-2023