Jump to content

Gliese 1

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by Cydebot (talk | contribs) at 10:37, 14 September 2012 (Robot - Moving category HIP objects to Category:Hipparcos objects per CFD at Wikipedia:Categories for discussion/Log/2012 August 10.). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Gliese 1
Observation data
Epoch J2000      Equinox J2000
Constellation Sculptor
Right ascension 00h 05m 24.4279s[1]
Declination −37° 21′ 26.503″[1]
Apparent magnitude (V) 8.57[2]
Characteristics
Spectral type M1.5V[2]
U−B color index +1.04[3]
B−V color index +1.46[3]
Variable type BY[4]
Astrometry
Radial velocity (Rv)+23.6 ± 2[5] km/s
Proper motion (μ) RA: 5633.95[1] mas/yr
Dec.: -2336.69[1] mas/yr
Parallax (π)230.42 ± 0.90 mas[1]
Distance14.15 ± 0.06 ly
(4.34 ± 0.02 pc)
Absolute magnitude (MV)10.35[6]
Details
Mass0.45[7]–0.48[8] M☉
Radius0.46–0.48[9] R☉
Temperature3,380[10] K
Rotational velocity (v sin i)4.8[11] km/s
Age(0.1 ± 0.1) × 106[12] years
Other designations
GJ 1, G 267-025, CD -37°15492, CPD−37°9435, GC 49, GCTP 5817.00, HD 225213, HIP 439, LHS 1, LTT 23, NLTT 134, NSV 15017, SAO 192348.[2]
Database references
SIMBADdata

Gliese 1 is a red dwarf star in the constellation Sculptor, which is found in the southern celestial hemisphere. It is one of the closest stars to the Sun, at an approximate distance of 14.2 light years. However with an apparent magnitude of about 8.5 it is too faint to be seen without a telescope.[2]

Properties

The stellar classification of this star has been rated from M1.5V to M4.0V by various sources.[13] Gliese 1 is estimated to have 45–48%[7][8] of the Sun's mass and 46–48%[9] of the Sun's radius.

This star is identified as a BY Draconis type variable star with the variable star designation NSV 15017.[4] It has also been identified as a flare star.[14] Like other flare stars, it emits X-rays.[15]

This star has been examined for an orbiting companion using speckle interferometry in the near infrared part of the spectrum. However, no companion was found to a magnitude limit of 10.5 at 1 AU from the primary, out to a magnitude limit of 12.5 at 10 AU.[16] Radial velocity measurements have likewise failed to reveal the presence of a companion orbiting this star. This search excludes a planet with a few Earth masses orbiting in the habitable zone, or a Jupiter-mass planet orbiting at a radius of 1 AU or less. The radial velocity shows little or no variability, with a measurement precision of less than 20 m/s.[17]

The space velocity components of this star are U = +77.2, V = -99.5 and W = -35.6 km/s.[18] It is orbiting through the Milky Way galaxy with an orbital eccentricity of 0.45, and a distance from the galactic core that varies from 3,510 to 9,150 parsecs. By comparison, the Sun is currently 8,500 parsecs from the core.[19] Stars with high peculiar velocities are termed runaway stars. This star has a high peculiar velocity of 111.3 km/s, and the velocity vector for this star may link it with the Tucana-Horologium and/or the AB Doradus stellar associations.[12]

As it lies very close to the origin of the astronomical right ascension coordinates during the 1950 Epoch, it became the first star in both the Gliese Catalogue of Nearby Stars and the Luyten Half-Second star catalogues.[20][21]

See also

References

  1. ^ a b c d e Perryman, M. A. C.; et al. (1997), "The Hipparcos Catalogue", Astronomy & Astrophysics, 323: L49–L52, Bibcode:1997A&A...323L..49P
  2. ^ a b c d "NSV 15017 -- Flare Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2006-06-12.
  3. ^ a b Cousins, A. W. J. (1973). "UBV Photometry of Some Southern Stars (Third List)". Monthly Notes Astronomical Society of South Africa. 32 (2): 43–48.
  4. ^ a b "[[General Catalogue of Variable Stars]] NSV 15017". Centre de Données astronomiques de Strasbourg. Retrieved 2009-12-14. {{cite web}}: URL–wikilink conflict (help)
  5. ^ Wilson, R. E. (1953). General Catalogue of Stellar Radial Velocities. Carnegie Institute of Washington D.C. Bibcode:1953GCRV..C......0W. {{cite book}}: |access-date= requires |url= (help)
  6. ^ Schmitt JHMM, Liefke C (2004). "NEXXUS: A comprehensive ROSAT survey of coronal X-ray emission among nearby solar-like stars". Astron Astrophys. 417: 651–65. arXiv:astro-ph/0308510. Bibcode:2004A&A...417..651S. doi:10.1051/0004-6361:20030495. {{cite journal}}: Unknown parameter |month= ignored (help)
  7. ^ a b Zechmeister, M.; Kürster, M.; Endl, M. (August 6, 2009). "The M dwarf planet search programme at the ESO VLT + UVES. A search for terrestrial planets in the habitable zone of M dwarfs". arXiv:0908.0944. {{cite web}}: |access-date= requires |url= (help); Missing or empty |url= (help)CS1 maint: multiple names: authors list (link)
  8. ^ a b "The One Hundred Nearest Star Systems". RECONS. Georgia State University. 2009-01-01. Retrieved 2009-09-08.
  9. ^ a b Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy and Astrophysics. 367: 521–524. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451. {{cite journal}}: Unknown parameter |month= ignored (help)CS1 maint: multiple names: authors list (link) Note: Search the VizieR catalogue II/224 for HD 225213.
  10. ^ Gautier, Thomas N., III (2007). "Far-Infrared Properties of M Dwarfs". The Astrophysical Journal. 667 (1): 527–536. arXiv:0707.0464. Bibcode:2007ApJ...667..527G. doi:10.1086/520667. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help); Unknown parameter |month= ignored (help)CS1 maint: multiple names: authors list (link)
  11. ^ Schröder, C.; Reiners, A.; Schmitt, J. H. M. M. (2009). "Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo". Astronomy and Astrophysics. 493 (3): 1099–1107. Bibcode:2009A&A...493.1099S. doi:10.1051/0004-6361:200810377. {{cite journal}}: Unknown parameter |month= ignored (help)CS1 maint: multiple names: authors list (link)
  12. ^ a b Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. {{cite journal}}: Unknown parameter |month= ignored (help)CS1 maint: multiple names: authors list (link) CS1 maint: unflagged free DOI (link)
  13. ^ M1.5: SIMBAD. M3: Gautier, Thomas N., III; et al (2007). M3: Schmitt, J. H. M. M.; et al (2004). M4: Eggen, Olin J. (1996) M4: Pasinetti-Fracassini, L. E.; et al (2001).
  14. ^ Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (1999). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition". Astronomy and Astrophysics Supplement. 139: 555–558. Bibcode:1999A&AS..139..555G. doi:10.1051/aas:1999407. {{cite journal}}: Unknown parameter |month= ignored (help)CS1 maint: multiple names: authors list (link)
  15. ^ Schmitt JHMM, Fleming TA, Giampapa MS (1995). "The X-ray view of the low-mass stars in the solar neighborhood". Ap J. 450 (9): 392–400. Bibcode:1995ApJ...450..392S. doi:10.1086/176149. {{cite journal}}: Unknown parameter |month= ignored (help)CS1 maint: multiple names: authors list (link)
  16. ^ Leinert, C.; Henry, T.; Glindemann, A.; McCarthy, D. W., Jr. (1997). "A search for companions to nearby southern M dwarfs with near-infrared speckle interferometry". Astronomy and Astrophysics. 325: 159–166. Bibcode:1997A&A...325..159L. {{cite journal}}: Unknown parameter |month= ignored (help)CS1 maint: multiple names: authors list (link)
  17. ^ Zechmeister, M.; Kürster, M.; Endl, M. (2009). "The M dwarf planet search programme at the ESO VLT + UVES. A search for terrestrial planets in the habitable zone of M dwarfs". Astronomy and Astrophysics. 505 (2): 859–871. arXiv:0908.0944. Bibcode:2009A&A...505..859Z. doi:10.1051/0004-6361/200912479. {{cite journal}}: Unknown parameter |month= ignored (help)CS1 maint: multiple names: authors list (link)
  18. ^ Eggen, Olin J. (1996). "Distribution and Corrlation of Age, Abundance, and Motion of Lower Main Sequence Stars". Astronomical Journal. 111: 466–475. Bibcode:1996AJ....111..466E. doi:10.1086/117797. {{cite journal}}: Unknown parameter |month= ignored (help)
  19. ^ Allen, Christine; Santillan, Alfredo (1991). "An improved model of the galactic mass distribution for orbit computations". Revista Mexicana de Astronomia y Astrofisica. 22: 255–263. Bibcode:1991RMxAA..22..255A. {{cite journal}}: Unknown parameter |month= ignored (help)CS1 maint: multiple names: authors list (link)
  20. ^ Gliese, W. (1969). "Catalogue of Nearby Stars". Veröffentlichungen des Astronomischen Rechen-Instituts Heidelberg. Bibcode:1969VeARI..22....1G.
  21. ^ Luyten, W. J. (1976). LHS (Luyten half-second) Catalogue. Minneapolis, Minnesota: University of Minnesota. Retrieved 2009-09-09.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Gliese_1&oldid=512372139"