B/pollux POLLUX database of synthetic stellar spectra (Palacios+ 2010-2011)
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)> =2010A&A...516A..13P
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. Both high resolution (R>150000) optical spectra in the range 3000 to 12000Å and spectral energy distributions extending from the UV to near-IR ranges are presented. These spectra cover the HR diagram at solar metallicity. 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.graal.univ-montp2.fr/ 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:
FileName Lrecl Records Explanations
ReadMe 80 . This file pollux.dat 164 2451 *Description of the data in the POLLUX database (Version 2011-06-01)
Note on pollux.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.
See also: http://pollux.graal.univ-montp2.fr/ : POLLUX Database Home Page Byte-by-byte Description of file: pollux.dat
Bytes Format Units Label Explanations
2- 6 I5 --- Seq Internal Identification number 8-111 A104 --- Shortname Name of the data file in the database (1) 113-116 A4 --- Type Type of Data, "sed" or "spec" (1) 118-126 A9 --- Model Code used to compute model atmosphere 128-132 I5 K Teff Effective Temperature 134-138 F5.2 [cm/s2] logg ? Logarithm of the surface gravity 140-144 F5.1 km/s Vturb Microturbulent velocity 146-150 F5.2 [-] [Fe/H] Metallicity 152-157 I6 0.1nm lam.min Lower bound of the wavelength domain 159-164 I6 0.1nm lam.max Upper bound of the wavelength domain
Note (1): 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.
History: * 16-Apr-2010: Original version (1040 spectra) * 06-Jun-2011: Version 2451 spectra. Acknowledgements: Ana Palacios, ana.palacios(at)univ-montp2.fr
(End) Ana Palacios [CNRS/UM2, France], Patricia Vannier [CDS] 16-Apr-2010
|The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line|