PG 1159-035

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[5] and, like the other PG 1159 stars, is in transition between being the central star of a planetary nebula and being a white dwarf.[6]

PG 1159-035
Observation data
Epoch J2000.0 (ICRS)      Equinox J2000.0 (ICRS)
Constellation Virgo
Right ascension 12h 01m 45.9729s[1]
Declination −03° 45′ 40.6279″[1]
Apparent magnitude (V) 14.9[2]
Astrometry
Proper motion (μ) RA: −14.213±0.155[1] mas/yr
Dec.: −3.260±0.064[1] mas/yr
Parallax (π)1.8131 ± 0.0821 mas[1]
Distance1,800 ± 80 ly
(550 ± 20 pc)
Details
Mass0.63[3] M☉
Radius0.0254 ± 0.005[4] R☉
Luminosity (bolometric)200[4] L☉
Surface gravity (log g)7.59[3] cgs
Temperature136,000[3] K
Other designations
GW Vir, GW Virginis, 2E 2572, WD 1159-034
Database references
SIMBADdata

The luminosity of PG 1159-035 was observed to vary in 1979,[7] and it was given the variable star designation GW Vir in 1985.[8] Variable PG 1159 stars may be called GW Vir stars, or the class may be split into DOV and PNNV stars.[9][10] The variability of PG 1139-035, like that of other GW Vir stars, arises from non-radial gravity wave pulsations within itself.[11] Its light curve has been 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.[12] [13]

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. "PG 1159-035". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 June 2007.
  3. Chen, Y. H. (2019). "Asteroseismology of the DOV star PG 1159-035". Monthly Notices of the Royal Astronomical Society. 488 (2): 2253. arXiv:1907.01137. Bibcode:2019MNRAS.488.2253C. doi:10.1093/mnras/stz1813.
  4. Kawaler, Steven D.; Bradley, Paul A. (1994). "Precision asteroseismology of pulsating PG 1159 stars". The Astrophysical Journal. 427: 415. Bibcode:1994ApJ...427..415K. doi:10.1086/174152.
  5. Green, R. F.; Schmidt, M.; Liebert, J. (1986). "The Palomar-Green Catalog of Ultraviolet-Excess Stellar Objects". The Astrophysical Journal Supplement Series. 61: 305. Bibcode:1986ApJS...61..305G. doi:10.1086/191115. CDS ID II/207 Archived 2007-02-20 at the Wayback Machine.
  6. Jahn, D.; Rauch, T.; Reiff, E.; Werner, K.; Kruk, J. W.; Herwig, F. (2007). "High-resolution ultraviolet spectroscopy of PG 1159-035 with HST and FUSE". Astronomy and Astrophysics. 462 (1): 281. arXiv:astro-ph/0610592. Bibcode:2007A&A...462..281J. doi:10.1051/0004-6361:20065901. S2CID 17679220.
  7. McGraw, J. T.; Starrfield, S. G.; Liebert, J.; Green, R. (1979). "PG 1159-035: A New, Hot, Non-Da Pulsating Degenerate". IAU Colloq. 53: White Dwarfs and Variable Degenerate Stars: 377. Bibcode:1979wdvd.coll..377M.
  8. Kholopov, P. N.; Samus, N. N.; Kazarovets, E. V.; Perova, N. B. (1985). "The 67th Name-List of Variable Stars". Information Bulletin on Variable Stars. 2681: 1. Bibcode:1985IBVS.2681....1K.
  9. Nagel, T.; Werner, K. (2004). "Detection of non-radial g-mode pulsations in the newly discovered PG 1159 star <ASTROBJ>HE 1429-1209</ASTROBJ>". Astronomy and Astrophysics. 426. arXiv:astro-ph/0409243. Bibcode:2004A&A...426L..45N. doi:10.1051/0004-6361:200400079. S2CID 9481357.
  10. Quirion, P. -O; Fontaine, G.; Brassard, P. (2007). "Mapping the Instability Domains of GW vir Stars in the Effective Temperature-Surface Gravity Diagram". The Astrophysical Journal Supplement Series. 171 (1): 219. Bibcode:2007ApJS..171..219Q. doi:10.1086/513870.
  11. Winget, D. E. (1998). "Asteroseismology of white dwarf stars". Journal of Physics: Condensed Matter. 10 (49): 11247–11261. Bibcode:1998JPCM...1011247W. doi:10.1088/0953-8984/10/49/014.
  12. Winget, D. E.; et al. (1991). "Asteroseismology of the DOV Star PG 1159-035 with the Whole Earth Telescope". The Astrophysical Journal. 378: 326. Bibcode:1991ApJ...378..326W. doi:10.1086/170434. hdl:10183/108718.
  13. Costa, J. E. S.; et al. (2008). "The pulsation modes of the pre-white dwarf PG 1159-035". Astronomy and Astrophysics. 477 (2): 627. arXiv:0711.2244. Bibcode:2008A&A...477..627C. doi:10.1051/0004-6361:20053470. S2CID 6762152.
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