Astronomy:PG 1159-035

From HandWiki
Short description: Star in the constellation Virgo
PG 1159-035
250px
A light curve for GW Virginis, adapted from Winget et al. (1985)[1]
Observation data
Equinox J2000.0]] (ICRS)
Constellation Virgo
Right ascension  12h 01m 45.9731s[2]
Declination −03° 45′ 40.629″[2]
Apparent magnitude (V) 14.9[3]
Characteristics
Evolutionary stage PG 1159[4]
Spectral type DOQZ1[5]
Variable type GW Vir[3]
Astrometry
Proper motion (μ) RA: −14.495[2] mas/yr
Dec.: −3.207[2] mas/yr
Parallax (π)1.6905 ± 0.0642[2] mas
Distance1,930 ± 70 ly
(590 ± 20 pc)
Details
Mass0.63[6] M☉
Radius0.0254 ± 0.005[7] R☉
Luminosity (bolometric)200[7] L☉
Surface gravity (log g)7.59[6] cgs
Temperature136,000[6] K
Other designations
GW Vir, GW Virginis, 2E 2572, WD 1159-034[8]
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[9] and, like the other PG 1159 stars, is in transition between being the central star of a planetary nebula and being a white dwarf.[4]

The luminosity of PG 1159-035 was observed to vary in 1979,[10] and it was given the variable star designation GW Virginis (abbreviation GW Vir) in 1985.[11] Variable PG 1159 stars may be called GW Vir stars, or the class may be split into DOV and PNNV stars.[12][13] The variability of PG 1139-035, like that of other GW Vir stars, arises from non-radial gravity wave pulsations within itself.[14] 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.[15] [16]

References

  1. ↑ Winget, D. E.; Kepler, S. O.; Robinson, E. L.; Nather, R. E.; O’Donoghue, Darragh (May 1985). "A measurement of secular evolution in the pre-white dwarf star PG 1159-035". The Astrophysical Journal 292: 606–613. doi:10.1086/163193. Bibcode: 1985ApJ...292..606W. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports 61 (1): 80. doi:10.1134/S1063772917010085. Bibcode: 2017ARep...61...80S. 
  4. ↑ 4.0 4.1 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. doi:10.1051/0004-6361:20065901. Bibcode: 2007A&A...462..281J. 
  5. ↑ Wesemael, F.; Greenstein, J. L.; Liebert, James; Lamontagne, R.; Fontaine, G.; Bergeron, P.; Glaspey, J. W. (1993). "An Atlas of Optical Spectra of White-Dwarf Stars". Publications of the Astronomical Society of the Pacific 105: 761. doi:10.1086/133228. Bibcode: 1993PASP..105..761W. 
  6. ↑ 6.0 6.1 6.2 Chen, Y. H. (2019). "Asteroseismology of the DOV star PG 1159-035". Monthly Notices of the Royal Astronomical Society 488 (2): 2253. doi:10.1093/mnras/stz1813. Bibcode: 2019MNRAS.488.2253C. 
  7. ↑ 7.0 7.1 Kawaler, Steven D.; Bradley, Paul A. (1994). "Precision asteroseismology of pulsating PG 1159 stars". The Astrophysical Journal 427: 415. doi:10.1086/174152. Bibcode: 1994ApJ...427..415K. 
  8. ↑ "PG 1159-035". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=PG+1159-035. 
  9. ↑ Green, R. F.; Schmidt, M.; Liebert, J. (1986). "The Palomar-Green Catalog of Ultraviolet-Excess Stellar Objects". The Astrophysical Journal Supplement Series 61: 305. doi:10.1086/191115. Bibcode: 1986ApJS...61..305G.  CDS ID II/207 .
  10. ↑ 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. 
  11. ↑ 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. 
  12. ↑ 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. doi:10.1051/0004-6361:200400079. Bibcode: 2004A&A...426L..45N. 
  13. ↑ 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. doi:10.1086/513870. Bibcode: 2007ApJS..171..219Q. 
  14. ↑ Winget, D. E. (1998). "Asteroseismology of white dwarf stars". Journal of Physics: Condensed Matter 10 (49): 11247–11261. doi:10.1088/0953-8984/10/49/014. Bibcode: 1998JPCM...1011247W. 
  15. ↑ Winget, D. E. et al. (1991). "Asteroseismology of the DOV Star PG 1159-035 with the Whole Earth Telescope". The Astrophysical Journal 378: 326. doi:10.1086/170434. Bibcode: 1991ApJ...378..326W. 
  16. ↑ Costa, J. E. S. et al. (2008). "The pulsation modes of the pre-white dwarf PG 1159-035". Astronomy and Astrophysics 477 (2): 627. doi:10.1051/0004-6361:20053470. Bibcode: 2008A&A...477..627C. 



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:PG_1159-035&oldid=3930317"