Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1273..101g&link_type=abstract
17TH EUROPEAN WHITE DWARF WORKSHOP. AIP Conference Proceedings, Volume 1273, pp. 101-104 (2010).
Astronomy and Astrophysics
Astronomy
White Dwarfs, Photometry, Astrometry, Brightness, Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae, Photometric, Polarimetric, And Spectroscopic Instrumentation, Distances, Parallaxes, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification
Scientific paper
We present improved atmospheric parameters of nearby white dwarfs lying within 20 pc of the Sun. The aim of the current study is to obtain the best statistical model of the least-biased sample of the white dwarf population. A homogeneous analysis of the local population is performed combining detailed spectroscopic and photometric analyses based on improved model atmosphere calculations for various spectral types including DA, DQ, and DZ stars. The spectroscopic technique is applied to all stars in our sample for which optical spectra are available. Photometric energy distributions, when available, are also combined to trigonometric parallax measurements to derive effective temperatures, stellar radii, as well as atmospheric compositions. A revised catalog of white dwarfs in the solar neighborhood is completed. Effective temperature, mass distributions, and luminosity function are also discussed.
Bergeron Pierre
Dufour Patrick
Giammichele Noemi
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