Access to Astronomical Catalogues

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