Astronomy:Gliese 293

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Short description: Star in the constellation Volans

Coordinates: Sky map 07h 53m 08.15s, −67° 47′ 31.4″

Gliese 293
Gliese 293 is located in the constellation Volans.
Gliese 293 is located in the constellation Volans.
           Gliese 293
Location of Gliese 293 in the constellation Volans

Observation data
Equinox J2000.0]] (ICRS)
Constellation Volans[1]
Right ascension  07h 53m 08.1439s[2]
Declination −67° 47′ 31.382″[2]
Apparent magnitude (V) 13.96[3]
Characteristics
Evolutionary stage white dwarf[4]
Spectral type DC8.8,[4] or DC10.3[5]
Apparent magnitude (B) 14.75[6]
Apparent magnitude (RKC) 13.58[3]
Apparent magnitude (IKC) 13.20[3]
Apparent magnitude (J) 12.726±0.023[7]
Apparent magnitude (H) 12.476±0.026[7]
Apparent magnitude (KS) 12.362±0.024[7]
Astrometry
Proper motion (μ) RA: 1,467.123[2] mas/yr
Dec.: −1,489.721[2] mas/yr
Parallax (π)122.4130 ± 0.0114[2] mas
Distance26.644 ± 0.002 ly
(8.1691 ± 0.0008 pc)
Absolute magnitude (MV)14.47±0.04[3]
Details
Mass0.59±0.01[3] M☉
Radius0.0128[3][note 1] R☉
Surface gravity (log g)8.00±0.02[3] cgs
Temperature5,700±90[3] K
Age2.65±0.10[3][note 2] Gyr
Other designations
GJ 293, EGGR 56, L 97-12, LAWD 26, LFT 555, LHS 34, LTT 2981, PLX 1882, WD 0752-676, 2MASS J07530814-6747314[8]
Database references
SIMBADdata

Gliese 293 (or WD 0752-676, or LHS 34, or L 97-12) is a nearby white dwarf star, located 26.64 light-years away in the constellation Volans. It is the nearest star in this constellation and also the only one within 10 parsecs.[9]: 84 

Distance

Gliese 293 is the 12th-nearest known white dwarf.[10] A trigonometric parallax of Gliese 293 was included in the YPC (Yale Parallax Catalog), and subsequently it was measured more precisely in CTIOPI (Cerro Tololo Inter-American Observatory (CTIO) Parallax Investigation) 0.9 m telescope program, and by Gaia.

Gliese 293 parallax measurements
Source Paper Parallax, mas Distance, pc Distance, ly Ref.
YPC van Altena et al., 1995 141.2±8.4 7.08±0.42 23.10±1.37 [11]
CTIOPI 0.9 m TSN-21 (Subasavage et al., 2009) 126.25±1.34 7.92±0.08 25.83±0.27 [3]
Gaia DR3 Gaia Collaboration 2023 122.4130±0.0114 8.1691±0.0008 26.644±0.002 [2]

Physical parameters

The mass of Gliese 293 is 0.59±0.01 Solar masses,[3] and its surface gravity is 108.00±0.02 cm/s2,[3] or approximately 102,000 times Earth's, corresponding to a radius of 8,887 kilometres (5,522 miles), or 139% of Earth's.

Gliese 293 has a temperature of 5,700±90 K,[3] almost like the Sun, and a cooling age, i.e. age as a degenerate star (not including its lifetime as a main-sequence star and a giant star) of 2.65±0.10 Gyr[3] It has a white appearance due to similar temperature to Sun.

See also

Notes

  1. ↑ From surface gravity and mass.
  2. ↑ White dwarf cooling age, i.e. age as degenerate star (not including lifetime as main-sequence star and as giant star)

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R  Constellation record for this object at VizieR.
  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. ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 3.11 3.12 3.13 Subasavage, John P.; Jao, Wei-Chun; Henry, Todd J.; Bergeron, P.; Dufour, P.; Ianna, Philip A.; Costa, Edgardo; Méndez, René A. (2009). "The Solar Neighborhood. XXI. Parallax Results from the CTIOPI 0.9 m Program: 20 New Members of the 25 Parsec White Dwarf Sample". The Astronomical Journal 137 (6): 4547. doi:10.1088/0004-6256/137/6/4547. Bibcode: 2009AJ....137.4547S. 
  4. ↑ 4.0 4.1 Holberg, J. B.; Sion; Oswalt; McCook; Foran; Subasavage (2008). "A New Look at the Local White Dwarf Population". The Astronomical Journal 135 (4): 1225–1238. doi:10.1088/0004-6256/135/4/1225. Bibcode: 2008AJ....135.1225H. https://commons.erau.edu/publication/886. 
  5. ↑ Sion, Edward M.; Holberg; Oswalt; McCook; Wasatonic (2009). "The White Dwarfs within 20 Parsecs of the Sun: Kinematics and Statistics". The Astronomical Journal 138 (6): 1681–1689. doi:10.1088/0004-6256/138/6/1681. Bibcode: 2009AJ....138.1681S. 
  6. ↑ Zacharias, N.; Monet, D. G.; Levine, S. E.; Urban, S. E.; Gaume, R.; Wycoff, G. L. (2004). "The Naval Observatory Merged Astrometric Dataset (NOMAD)". American Astronomical Society Meeting Abstracts 205. Bibcode: 2004AAS...205.4815Z. 
  7. ↑ 7.0 7.1 7.2 Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T. et al. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". Vizier Online Data Catalog. Bibcode: 2003yCat.2246....0C. 
  8. ↑ "GJ 293 -- White Dwarf". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=GJ+293+--+White+Dwarf. 
  9. ↑ Kirkpatrick, J. Davy et al. (April 2024). "The Initial Mass Function Based on the Full-sky 20 pc Census of ~3600 Stars and Brown Dwarfs". The Astrophysical Journal Supplement Series 271 (2): 55. doi:10.3847/1538-4365/ad24e2. Bibcode: 2024ApJS..271...55K. 
  10. ↑ Reylé, Céline; Jardine, Kevin; Fouqué, Pascal; Caballero, Jose A.; Smart, Richard L.; Sozzetti, Alessandro (30 April 2021). "The 10 parsec sample in the Gaia era". Astronomy & Astrophysics 650: A201. doi:10.1051/0004-6361/202140985. Bibcode: 2021A&A...650A.201R.  Data available at https://gruze.org/10pc/
  11. ↑ Van Altena, W. F.; Lee, J. T.; Hoffleit, E. D. (1995). The general catalogue of trigonometric [stellar] parallaxes. Bibcode: 1995gcts.book.....V. 



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