B/pollux POLLUX database of synthetic stellar spectra (Palacios+ 2010-2024)
The POLLUX database of synthetic stellar spectra.
Palacios A., Gebran M., Josselin E., Martins F., Plez B., Belmas M.,
Lebre A.
<Astron. Astrophys. 516, A13 (2010); 545, A67 (2021)>
=2010A&A...516A..13P 2010A&A...516A..13P
+2021A&A...545A..67B 2021A&A...545A..67B
ADC_Keywords: Spectroscopy ; Models
Keywords: astronomical data bases: miscellaneous - stars: general -
techniques: spectroscopic
Abstract:
Synthetic spectra are needed to determine fundamental stellar and wind
parameters of all types of stars. They are also used for the
construction of theoretical spectral libraries helpful for stellar
population synthesis. Therefore, a database of theoretical spectra is
required to allow rapid and quantitative comparisons to spectroscopic
data. We provide such a database offering an unprecedented coverage of
the entire Hertzsprung-Russell diagram.
We present the POLLUX database of synthetic stellar spectra. For
objects with Teff≤6000K, MARCS atmosphere models are computed and the
program TURBOSPECTRUM provides the synthetic spectra. ATLAS12 models
are computed for stars with 7000K≤Teff≤15000K. SYNSPEC gives the
corresponding spectra. Finally, the code CMFGEN provides atmosphere
models for the hottest stars (Teff>25000K). Their spectra are computed
with CMFFLUX. STAGGER 3D RHD models are computed for stars with
3900K≤Teff≤7000K. OPTIM3D gives the corresponding spectra. MARCS
(from the AMBRE project, https://doi.org/10.1051/0004-6361/201219330)
and ATLAS12 data consist of high resolution (R>150000) optical spectra
in the range 3000 to 12000Å for a large variety of metallicities
and chemical compositions. The CMFGEN data are high resolution (R >
150000) spectra in the optical, the UV and the IR domains and spectral
energy distributions extending from the UV to near-IR ranges at solar
metallicity and at the subsolar metallicities of Z=1/5Zsun and
Z=1/30Zsun (https://arxiv.org/pdf/2010.13430.pdf). The OPTIM3D-STAGGER
data are medium resolution (R=20000) spectra in the optical, the UV
and the IR domains from 2000 to 200000Å. The OPTIM3D-Gaia data are
very high resolution spectra (R=300000) in the Gaia-RVS spectral
domain (from 8395Å to 8905Å )
(https://doi.org/10.1051/0004-6361/201732147). All the spectra cover
the HR diagram at various metallicities. We propose a wide variety of
synthetic spectra for various types of stars in a format that is
compliant with th Virtual Observatory standards. A user-friendly web
interface allows an easy selection of spectra and data retrieval.
Upcoming developments will include an extension to a large range of
metallicities and to the near-IR high resolution spectra, as well as a
better coverage of the HR diagram, with the inclusion of models for
Wolf-Rayet stars and large datasets for cool stars. The POLLUX
database is accessible at http://pollux.oreme.org/ and through the
Virtual Observatory.
Description:
A description of the data (high resolution synthetic spectra and
spectral energy distributions) in the POLLUX database is presented in
the form of an ascii table providing parameters that can be queried
(Teff, logg, code, metallicity) and giving the filename and URL where
a fits file can be retrieved.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
sed.dat 272 833 *Pollux energy distributions in the POLLUX
database (version 16/07/2024)
sshrflux.dat 298 18444 *High resolution synthetic spectra in the
POLLUX database (version 16/07/2024)
sshrint.dat 189 5373 *High resolution synthetic intensity in the
Pollux database (version 16/07/2024)
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Note on sed.dat, sshrflux.dat and sshrint.dat: Model atmosphere and codes for
spectral synthesis used are CMFGEN/CMF_FLUX for O-type stars, ATLAS12/SYNSPEC
for A and F-type stars, MARCS/TURBOSPECTRUM for G to M type stars.
STAGGER/OPTIM3D spectra based of 3D RHD simulations are also provided for G
to M type stars in the optical domain and in the Gaia-RVS spectral domain.
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See also:
http://pollux.oreme.org/ : POLLUX Database Home Page
Byte-by-byte Description of file: sed.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1-101 A101 --- oid DB key of the spectrum
103-200 A98 --- Shortname Short name of the spectrum file (G1)
202-204 A3 --- Type [sed spec] Spectrum type (G1)
206-225 A20 --- Collection Collection
227-231 I5 K Teff [20638/66450] Effective temperature
233-237 I5 K Tstar [33780/74300]? Temperature @ optical
depth = 20
239-243 F5.2 [cm/s2] logg [2.4/4.51]? Log10 of surface gravity
245-248 F4.1 km/s Vturb [10.0/50.0] Microturbulent velocity
250-254 F5.2 [Sun] [Fe/H] [-1.48/0.0] Metallicity
256-260 F5.2 0.1nm lam.min [43.14/50.0] Minimal wavelength
262-272 F11.4 0.1nm lam.max [199993.85/849462.0] Maximal wavelength
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Byte-by-byte Description of file: sshrflux.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1-113 A113 --- oid DB key of the spectrum
115-217 A103 --- Shortname Short name of the spectrum file (G1)
219-222 A4 --- Type [sed spec] Spectrum type (G1)
224-239 A16 --- Collection Collection
241-245 I5 K Teff [2000/66450] Effective temperature
247-251 I5 K Tstar [33780/74300]? Value for the
temperature @ optical depth = 20
253-257 F5.2 [cm/s2] logg [-0.5/5.5]? Log10 of surface gravity
259-265 F7.3 km/s Vturb [0.0/50.0]? Microturbulent velocity
267-271 F5.2 [Sun] [Fe/H] [-5.0/1.0] Metallicity
273-275 A3 --- SpecRange [UV VIS IR] Spectral domain (G2)
277-286 F10.4 0.1nm lam.min [900.0/12000.09] Minimal wavelength
288-298 F11.4 0.1nm lam.max [2999.98/200000.0] Maximal wavelength
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Byte-by-byte Description of file: sshrint.dat
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Bytes Format Units Label Explanations
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1- 68 A68 --- oid DB key of the spectrum
70-125 A56 --- Shortname Short name of the spectrum file (G1)
127-130 A4 --- Type [sed spec] Spectrum type (G1)
132-148 A17 --- Collection Collection
150-153 I4 K teff [3899/7000] Effective temperature
155-158 F4.2 [cm/s2] logg [1.5/5.0]? Log10 of surface gravity
160-163 F4.1 --- [Fe/H] [-4.0/0.5] Metallicity
165-168 F4.2 --- mu [0.01/1.0] Angle value
170-172 A3 --- SpecRange [UV VIS IR] Spectral domain (G2)
174-180 F7.1 0.1nm lam.min [2000.0/12000.0] Minimal wavelength
182-189 F8.1 0.1nm lam.max [3000.0/200000.0] Maximal wavelength
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Global notes:
Note (G1): The FITS file for this data can be retrieved at the url:
http://pollux.graal.univ-montp2.fr/ssaserver/tsap?Id=<Shortname>.FITS
* Files with extension ".spec" refer to high resolution synthetic
spectra (R>150000).
* Files with extension ".sed" refer to spectral energy distributions.
In both cases, the wavelength coverage is indicated by lamMin and lamMax.
Note (G2): Spectral domain indicated only for high resolution synthetic spectra.
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History:
* 16-Apr-2010: Original version (1040 spectra)
* 06-Jun-2011: Version 2451 spectra
* 15-Mar-2015: version 8134 spectra
* 13-Nov-2018: new version
* 24-Nov-2020: new version
* 16-Mar-2021: new version
* 26-May-2023: new version
* 16-Jul-2024: new version
Acknowledging :
When using POLLUX data for scientific publication, please quote the reference
Palacios A., Gebran M., Josselin E., Martins F., Plez B., Belmas M.,
Lebre A., 2010, A&A 516, A13
and mention the following sentence:
This research was achieved using the POLLUX database
( http://pollux.oreme.org ) operated at LUPM
(Universite Montpellier - CNRS, France)
with the support of the PNPS and INSU.
Acknowledgements:
Ana Palacios, umontpellier.fr
Michele Sanguillon, umontpellier.fr
(End) A. Palacios, M. Sanguillon [CNRS/UM2 France], P. Vannier [CDS] 26-May-2023