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PG 1159-035

Star in the constellation Virgo

Star in the constellation Virgo

PG 1159-035 is the prototypical PG 1159 star after which the class of PG 1159 stars was named. It was discovered in the Palomar-Green survey of ultraviolet-excess stellar objects and, like the other PG 1159 stars, is in transition between being the central star of a planetary nebula and being a white dwarf.

The luminosity of PG 1159-035 was observed to vary in 1979, and it was given the variable star designation GW Virginis (abbreviation GW Vir) in 1985. Variable PG 1159 stars may be called GW Vir stars, or the class may be split into DOV and PNNV stars. The variability of PG 1139-035, like that of other GW Vir stars, arises from non-radial gravity wave pulsations within itself. Its light curve was observed intensively by the Whole Earth Telescope over a 264-hour period in March 1989, and over 100 of its vibrational modes have been found in the resulting vibrational spectrum, with periods ranging from 300 to 1,000 seconds.

References

References

  1. (1993). "An Atlas of Optical Spectra of White-Dwarf Stars". Publications of the Astronomical Society of the Pacific.
  2. (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports.
  3. "PG 1159-035".
  4. (2007). "High-resolution ultraviolet spectroscopy of PG 1159-035 with HST and FUSE". Astronomy and Astrophysics.
  5. (1979). "PG 1159-035: A New, Hot, Non-Da Pulsating Degenerate". IAU Colloq. 53: White Dwarfs and Variable Degenerate Stars.
  6. (1985). "The 67th Name-List of Variable Stars". Information Bulletin on Variable Stars.
  7. (2004). "Detection of non-radial g-mode pulsations in the newly discovered PG 1159 star HE 1429-1209". Astronomy and Astrophysics.
  8. (2007). "Mapping the Instability Domains of GW vir Stars in the Effective Temperature-Surface Gravity Diagram". The Astrophysical Journal Supplement Series.
  9. (1998). "Asteroseismology of white dwarf stars". Journal of Physics: Condensed Matter.
  10. (1991). "Asteroseismology of the DOV Star PG 1159-035 with the Whole Earth Telescope". The Astrophysical Journal.
  11. (2008). "The pulsation modes of the pre-white dwarf PG 1159-035". Astronomy and Astrophysics.
  12. {{cite Gaia DR3. 3600841623951744640
  13. (May 1985). "A measurement of secular evolution in the pre-white dwarf star PG 1159-035". The Astrophysical Journal.
  14. (2007-02-20). "The Palomar-Green Catalog of Ultraviolet-Excess Stellar Objects". The Astrophysical Journal Supplement Series.
  15. (2019). "Asteroseismology of the DOV star PG 1159-035". Monthly Notices of the Royal Astronomical Society.
  16. (1994). "Precision asteroseismology of pulsating PG 1159 stars". The Astrophysical Journal.
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