PG 1159-035

PG 1159-035

A light curve for GW Virginis, adapted from Winget et al. (1985)[1]
Observation data
Epoch J2000.0 (ICRS)      Equinox J2000.0 (ICRS)
Constellation Virgo
Right ascension 12h 01m 45.9729s[2]
Declination −03° 45′ 40.6279″[2]
Apparent magnitude (V) 14.9[3]
Astrometry
Proper motion (μ) RA: −14.213±0.155[2] mas/yr
Dec.: −3.260±0.064[2] mas/yr
Parallax (π)1.8131 ± 0.0821 mas[2]
Distance1,800 ± 80 ly
(550 ± 20 pc)
Details
Mass0.63[4] M☉
Radius0.0254 ± 0.005[5] R☉
Luminosity (bolometric)200[5] L☉
Surface gravity (log g)7.59[4] cgs
Temperature136,000[4] K
Other designations
GW Vir, GW Virginis, 2E 2572, WD 1159-034
Database references
SIMBADdata

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[6] and, like the other PG 1159 stars, is in transition between being the central star of a planetary nebula and being a white dwarf.[7]

The luminosity of PG 1159-035 was observed to vary in 1979,[8] and it was given the variable star designation GW Vir in 1985.[9] Variable PG 1159 stars may be called GW Vir stars, or the class may be split into DOV and PNNV stars.[10][11] The variability of PG 1139-035, like that of other GW Vir stars, arises from non-radial gravity wave pulsations within itself.[12] 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.[13] [14]

  1. ^ Cite error: The named reference Winget was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  3. ^ "PG 1159-035". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 June 2007.
  4. ^ a b c Cite error: The named reference chen2019 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference kb94 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference pgcat was invoked but never defined (see the help page).
  7. ^ 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.
  8. ^ 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.
  9. ^ 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.
  10. ^ 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.
  11. ^ 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. S2CID 122695910.
  12. ^ 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. S2CID 250749380.
  13. ^ 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.
  14. ^ 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.