Gliese 1061

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Gliese 1061
Observation data
Epoch J2000      Equinox J2000
Constellation Horologium
Right ascension  03h 35m 59.69s[1]
Declination −44° 30′ 45.3″[1]
Apparent magnitude (V) 13.03[2]
Characteristics
Spectral type M5.5 V[2]
Apparent magnitude (J) 7.52 ± 0.02[3]
U−B color index 1.52[3]
B−V color index 1.90[3]
Astrometry
Radial velocity (Rv)−8 km/s
Proper motion (μ) RA: 750.01[4] mas/yr
Dec.: -349.98[5] mas/yr
Parallax (π)270.86 ± 1.29[6] mas
Distance12.04 ± 0.06 ly
(3.69 ± 0.02 pc)
Absolute magnitude (MV)15.26[4]
Details
Mass0.113[5] M
Luminosity0.001[5] L
Metallicity [Fe/H]−0.09±0.09[7] dex
Rotational velocity (v sin i)≤ 5[8] km/s
Other designations
GJ 1061, LHS 1565, LFT 295, LTT 1702, LP 995-46, L 372-58.[3]
Database references
SIMBADdata

Gliese 1061 is a type of star known as a red dwarf, located approximately 12 light-years from Earth in the southern constellation of Horologium. Even though it is a relatively nearby star it has an apparent visual magnitude of about 13[2] so it can only be seen with at least a moderately-sized telescope.

The proper motion of Gliese 1061 has been known since 1974, but it was estimated to be further away: approximately 25 light years distant based upon an estimated parallax of 0.130. Its distance was only accurately determined in 1997 by the RECONS team. At that time, it was the 20th nearest star system to the Sun. The discovery team noted that many more stars such as this are likely to be discovered nearby.[2]

This star is a very small, dim, red dwarf, close to the lower mass limit for a star. It has an estimated mass of about 11.3% of the Sun and is only 0.1% as luminous.[5] The star has been examined for the presence of an astrometric companion, but none has been detected.[9] Nor does it display a significant infrared excess due to circumstellar dust.[10]

Planetary System[edit]

On August 13th, 2019, a planetary system was announced orbiting the star Gliese 1061 by the Red Dots project of detecting terrestrial planets around nearby red Dwarf stars.[11] The planet, Gliese 1016 d, orbits on the conservative circumstellar habitable zone of its star and the planet Gliese 1016 c orbit in the inner edge of the habitable zone.[12]

The Gliese 1061 planetary system
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 1.38+0.16
−0.15
 M
0.021 ± 0.001 3.204 ± 0.001 < 0.31
c 1.75 ± 0.23 M 0.035 ± 0.001 6.689 ± 0.005 < 0.29
d 1.68+0.25
−0.24
 M
0.054 ± 0.001 13.031+0.025
−0.032
< 0.53

See also[edit]

References[edit]

  1. ^ a b Cutri, R. M.; et al. (June 2003), "2MASS All-Sky Catalog of Point Sources", VizieR Online Data Catalog: II/246, Bibcode:2003yCat.2246....0C.
  2. ^ a b c d Henry, Todd J.; et al. (1997). "The solar neighborhood IV: discovery of the twentieth nearest star". The Astronomical Journal. 114: 388–395. Bibcode:1997AJ....114..388H. doi:10.1086/118482.
  3. ^ a b c d "LHS 1565". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2008-12-11.
  4. ^ a b Scholz, R.-D.; et al. (2000). "New high-proper motion survey in the Southern sky". Astronomy and Astrophysics. 353: 958–969. Bibcode:2000A&A...353..958S.
  5. ^ a b c d "The One Hundred Nearest Star Systems". RECONS. 2008-01-01. Retrieved 2008-12-11.
  6. ^ Lurie, John C.; et al. (2014). "The Solar Neighborhood. XXXIV. a Search for Planets Orbiting Nearby M Dwarfs Using Astrometry". The Astronomical Journal. 148 (5): 91. arXiv:1407.4820. Bibcode:2014AJ....148...91L. doi:10.1088/0004-6256/148/5/91.
  7. ^ Neves, V.; et al. (August 2014), "Metallicity of M dwarfs. IV. A high-precision [Fe/H] and Teff technique from high-resolution optical spectra for M dwarfs", Astronomy & Astrophysics, 568: 22, arXiv:1406.6127, Bibcode:2014A&A...568A.121N, doi:10.1051/0004-6361/201424139, A121.
  8. ^ Barnes, J. R.; et al. (April 2014), "Precision radial velocities of 15 M5-M9 dwarfs", Monthly Notices of the Royal Astronomical Society, 439 (3): 3094–3113, arXiv:1401.5350, Bibcode:2014MNRAS.439.3094B, doi:10.1093/mnras/stu172.
  9. ^ Bartlett, Jennifer L.; et al. (April 2009), "A Search for Astrometric Companions to Stars in the Southern Hemisphere", Publications of the Astronomical Society of the Pacific, 121 (878): 365–376, Bibcode:2009PASP..121..365B, doi:10.1086/599044.
  10. ^ Avenhaus, H.; et al. (December 2012), "The nearby population of M-dwarfs with WISE: a search for warm circumstellar dust", Astronomy & Astrophysics, 548: 15, arXiv:1209.0678, Bibcode:2012A&A...548A.105A, doi:10.1051/0004-6361/201219783, A105.
  11. ^ "Red Dots – A search for terrestrial planets around the nearest red dwarfs". Retrieved 2019-08-14.
  12. ^ Anglada-Escudé, G.; Reiners, A.; Pallé, E.; Ribas, I.; Berdiñas, Z. M.; López, C. Rodríguez; Morales, N.; López-González, M. J.; Hambsch, F.-J. (2019-08-13). "Red Dots: A temperate 1.5 Earth-mass planet in a compact multi-terrestrial planet system around GJ1061".

External links[edit]