Gliese 105

Last updated
Gliese 105
Gliese 105.gif
Gliese 105 A (left) and C (right).
Observation data
Epoch J2000       Equinox J2000
Constellation Cetus
Gliese 105 A
Right ascension 02h 36m 04.89466s [1]
Declination +06° 53′ 12.7466″ [1]
Apparent magnitude  (V)5.83 [2]
Gliese 105 B
Right ascension 02h 36m 15.357s [3]
Declination +06° 52′ 19.14″ [3]
Apparent magnitude  (V)11.670 [4]
Gliese 105 C
Right ascension 02h 36m 04.66s [5]
Declination +06° 53′ 14.8″ [5]
Apparent magnitude  (V)16.77 [5]
Characteristics
Gliese 105 AC
Spectral type K3 V [2] + M7 V [6]
U−B color index +0.800 [7]
B−V color index +0.972 [7]
Gliese 105 B
Spectral type M4.0 V
U−B color index +1.10 [8]
B−V color index +1.61 [8]
Variable type BY Dra
Astrometry
Gliese 105 A
Radial velocity (Rv)25.8 ± 0.1 [9]  km/s
Proper motion (μ)RA: 1778.585±0.430 [10]   mas/yr
Dec.: 1477.306±0.248 [10]   mas/yr
Parallax (π)138.3400 ± 0.3177  mas [10]
Distance 23.58 ± 0.05  ly
(7.23 ± 0.02  pc)
Absolute magnitude  (MV)6.50 [11]
Gliese 105 B
Proper motion (μ)RA: 1801.671±0.043 [12]   mas/yr
Dec.: 1450.487±0.038 [12]   mas/yr
Parallax (π)138.4371 ± 0.0420  mas [12]
Distance 23.560 ± 0.007  ly
(7.223 ± 0.002  pc)
Orbit [13]
Period (P)76.107 ± 1.820 yr
Semi-major axis (a)17.0 ± 0.7 au
Eccentricity (e)0.641 ± 0.004
Inclination (i)45.5 ± 2.8°
Longitude of the node (Ω)122.5 ± 3.4°
Periastron epoch (T)JD 2430414 ± 669
Argument of periastron (ω)
(primary)		133.4 ± 0.6°
Semi-amplitude (K1)
(primary)		711.7 ± 2.2 km/s
Details
Gliese 105 A
Mass 0.70 ± 0.10 [14]   M☉
Radius 0.650 ± 0.053 [2]   R☉
Luminosity (bolometric)0.26 [14]   L☉
Surface gravity (log g)4.40 ± 0.24 [15]   cgs
Temperature 4777 ± 91 [15]   K
Metallicity [Fe/H]−0.03 ± 0.09 [15]   dex
Gliese 105 B
Mass 0.246 ± 0.025 [4]   M☉
Radius 0.278 ± 0.010 [4]   R☉
Temperature 3284 ± 60 [4]   K
Metallicity [Fe/H]−0.12 ± 0.03 [4]   dex
Other designations
268 G. Cet, Gl  105, CCDM  J02361+0653, BD+06° 398
Gliese 105 AC: HR  753, HD  16160, LHS  15, LTT  10858, SAO  110636, FK5  1073, G  73-70, G 76-11, LFT  217, HIP  12114
Gliese 105 B: BX  Cet, LHS  16, LTT  10859, G  73-71, G 76-12, LFT  217
Database references
SIMBAD Gl 105
Gl 105 A
Gl 105 B
Gl 105 C
Cetus constellation map.svg
Red circle.svg
Gliese 105
Location of Gliese 105 in the constellation Cetus

Gliese 105 (also known as 268 G. Ceti) is a triple star system in the constellation of Cetus. It is located relatively near the Sun at a distance of 23.6 light-years (7.2 parsecs). [10] [12] Despite this, even the brightest component is barely visible with the unaided eye (see Bortle scale). No planets have yet been detected around any of the stars in this system.

This is a triple system with three stars that are all less massive than the Sun. The brightest component is designated HD 16160, and is known as Gliese 105 A. It is a K-type main-sequence star, [2] about 70% the mass of the Sun. [14] This star is unusual because its eruptions appear to not conform to the Waldmeier effect—i.e., the strongest eruptions of HD 16160 are not the ones characterized by the fast eruption onset. [16]

A nearby star has a similar proper motion to Gliese 105 A, so it is assumed to be physically associated with the primary, and is known as Gliese 105 B. The two have an estimated separation of 1,200 astronomical units (au). It is a BY Draconis variable star whose brightness varies between 11.64 and 11.68 magnitudes; for that reason it has been given the designation BX Ceti. [17]

A third companion, known as Gliese 105 C, lies much closer to A, currently at a distance of approximately 24 au. [6] The pair A-C have an estimated orbital period of about 70 years. [13] While detected directly, Gliese 105 C has also been observed to perturb Gliese 105 A from its usual position; [6] from that, its orbit is estimated to have a high eccentricity of around 0.64 and a semimajor axis of 17 au. [13] Gliese 105 C is an extremely faint red dwarf. [6] It is roughly 8 to 9 percent the mass of the Sun, and it is about 20,000 times fainter than its parent star in visible light—at a distance of 1 au (the distance from the Earth to the Sun) it would only be four times brighter than the full moon. [18]

Related Research Articles

Gliese 674(GJ 674) is a small red dwarf star with an exoplanetary companion in the southern constellation of Ara. It is too faint to be visible to the naked eye, having an apparent visual magnitude of 9.38 and an absolute magnitude of 11.09. The system is located at a distance of 14.8 light-years from the Sun based on parallax measurements, but is drifting closer with a radial velocity of −2.9 km/s. It is a candidate member of the 200 million year old Castor stream of co-moving stars.

<span class="mw-page-title-main">28 Andromedae</span> Star in the constellation Andromeda

28 Andromedae is a Delta Scuti variable star in the constellation Andromeda. 28 Andromedae is the Flamsteed designation. It also bears the variable star name GN Andromedae. Its apparent magnitude is 5.214, varying by less than 0.1 magnitudes.

<span class="mw-page-title-main">9 Aurigae</span> Multiple star system in the constellation Auriga

9 Aurigae is a star system in Auriga (constellation). It has an apparent magnitude of about 5, making it visible to the naked eye in many suburban skies. Parallax estimates made by the Hipparcos spacecraft put it at about 86 light-years from the solar system, although individual Gaia Data Release 3 parallaxes place all three components at 88 light years.

Gliese 673 is an orange dwarf star in the constellation Ophiuchus. It has a stellar classification of K7V. Main sequence stars with this spectra have a mass in the range of 60–70% of solar mass (M☉).

Gliese 176 is a red dwarf in the constellation of Taurus. Based upon parallax measurements from the Hipparcos mission, it is located 31 light-years away. The star is orbited by a Super-Earth.

<span class="mw-page-title-main">HD 29697</span> Star in the constellation Taurus

HD 29697 is a variable star of BY Draconis type in the constellation Taurus. It has an apparent magnitude around 8 and is approximately 43 ly away.

HD 118508 is a suspected variable star in the northern constellation of Boötes. Its apparent magnitude may vary with an amplitude of 0.04, discovered during a search for small-amplitude red variables. It is a red giant about 552 light years away.

<span class="mw-page-title-main">HD 128333</span> Star in the constellation Boötes

HD 128333 or CH Boötis is an irregular variable star in the northern constellation of Boötes. It is currently on the asymptotic giant branch of the HR diagram.

HD 112028 is an evolved star in the northern constellation of Camelopardalis. It has spectral peculiarities that have been interpreted as a shell, and also relatively weak magnesium and silicon lines. Its spectral class has been variously assigned between B9 and A2, and its luminosity class between a subgiant and bright giant.

HD 30442 is a solitary star in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye with an apparent magnitude of 5.47 and is estimated to be 403 light years away from the Solar System. The object has a heliocentric radial velocity of −37 km/s, indicating that it is drifting closer.

<span class="mw-page-title-main">HD 190007</span> Star in the constellation Aquila

HD 190007, also known as Gliese 775, is a star in the constellation of Aquila. Parallax measurements by Gaia put the star at a distance of 41.5 light-years away.

<span class="mw-page-title-main">HD 93607</span> Star in the constellation Carina

HD 93607 is a star in the constellation Carina. Its apparent magnitude is 4.87. Its parent cluster is IC 2602.

90 Tauri is a star in the zodiac constellation of Taurus, located 144 light-years away from the Sun. It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 4.27. 90 Tauri is a member of the Hyades cluster and is listed as a double star.

<span class="mw-page-title-main">QZ Puppis</span> Star in the constellation Puppis

QZ Puppis is a class B2.5V star in the constellation Puppis. Its apparent magnitude is 4.5 and it is approximately 650 light years away based on parallax.

Gliese 251, also known as HIP 33226 or HD 265866, is a star located about 18 light years away from the Solar System. Located in the constellation of Gemini, it is the nearest star in this constellation. It is located near the boundary with Auriga, 49 arcminutes away from the bright star Theta Geminorum; due to its apparent magnitude of +9.89 it cannot be observed with the naked eye. The closest star to Gliese 251 is QY Aurigae, which is located 3.5 light years away.

<span class="mw-page-title-main">GL Virginis</span> Star in the constellation Virgo

GL Virginis, also known as G 12-30, is a star in the constellation of Virgo. It is a faint red dwarf, like more than 70% of the stars located within 10 parsecs of the Solar System; its magnitude visual magnitude is 13.898, making it impossible to see with the naked eye.

<span class="mw-page-title-main">32 Tauri</span> Yellow-white hued subgiant star in the constellation Taurus.

32 Tauri is the Flamsteed designation for a solitary star in the zodiac constellation of Taurus. It has a visual magnitude of 5.64, making it visible to the naked eye from suburban skies. The position of this star near the ecliptic plane means that it is subject to occultations by the Moon. Parallax measurements put it at a distance of 144 light years from the Sun. It is drifting further away with a radial velocity of +31.9 km/s, having come to within 88.9 light-years some 759,000 years ago.

<span class="mw-page-title-main">Gliese 569</span> Nearby red dwarf in the constellation Boötes

Gliese 569 is a ternary star system composed of a main-sequence star orbited by a pair of brown dwarfs in the constellation of Boötes about 32 light years away.

HD 46815 is a solitary star in the southern constellation Columba. It is faintly visible to the naked eye with an apparent magnitude of 5.4 and is estimated to be 408 light years away. However, it is receding with a heliocentric radial velocity of 32.2 km/s.

15 Delphini is a star in the equatorial constellation Delphinus. It has an apparent magnitude of 5.99, allowing it to be faintly seen with the naked eye. The star is relatively close at a distance of 99 light years but is receding with a heliocentric radial velocity of 4.1 km/s.

References

  1. 1 2 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv: 0708.1752 . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID   18759600. Vizier catalog entry
  2. 1 2 3 4 van Belle, Gerard T.; von Braun, Kaspar (2009). "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars". The Astrophysical Journal. 694 (2): 1085–1098. arXiv: 0901.1206 . Bibcode:2009ApJ...694.1085V. doi:10.1088/0004-637X/694/2/1085. S2CID   18370219.
  3. 1 2 Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C. S2CID   115529446.
  4. 1 2 3 4 5 Mann, Andrew W.; Feiden, Gregory A.; Gaidos, Eric; Boyajian, Tabetha; von Braun, Kaspar (2015). "How to Constrain Your M Dwarf: Measuring Effective Temperature, Bolometric Luminosity, Mass, and Radius". The Astrophysical Journal. 804 (1): 38. arXiv: 1501.01635 . Bibcode:2015ApJ...804...64M. doi:10.1088/0004-637X/804/1/64. S2CID   19269312.
  5. 1 2 3 "GJ 105 C". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 4 June 2017.
  6. 1 2 3 4 Golimowski, David A.; et al. (2000). "The Very Low Mass Component of the Gliese 105 System". The Astronomical Journal. 120 (4): 2082–2088. arXiv: astro-ph/0006230 . Bibcode:2000AJ....120.2082G. doi:10.1086/301567. S2CID   119505312.
  7. 1 2 González-Hernández, J. I.; Bonifacio, P. (2009). "A new implementation of the infrared flux method using the 2MASS catalogue". Astronomy & Astrophysics. 497 (2): 497. arXiv: 0901.3034 . Bibcode:2009A&A...497..497G. doi:10.1051/0004-6361/200810904. S2CID   16026032.
  8. 1 2 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  9. ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053 . Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID   119231169.
  10. 1 2 3 4 Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics . 649: A1. arXiv: 2012.01533 . Bibcode:2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657 . S2CID   227254300. (Erratum:  doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  11. ↑ Cardini, D. (January 2005), "Mg II chromospheric radiative loss rates in cool active and quiet stars", Astronomy and Astrophysics, 430: 303–311, arXiv: astro-ph/0409683 , Bibcode:2005A&A...430..303C, doi:10.1051/0004-6361:20041440, S2CID   12136256.
  12. 1 2 3 4 Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics . 649: A1. arXiv: 2012.01533 . Bibcode:2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657 . S2CID   227254300. (Erratum:  doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  13. 1 2 3 Feng, Fabo; Butler, R Paul; Jones, Hugh R A.; Phillips, Mark W.; Vogt, Steven S.; Oppenheimer, Rebecca; Holden, Bradford; Burt, Jennifer; Boss, Alan P. (2021). "Optimized modelling of Gaia–Hipparcos astrometry for the detection of the smallest cold Jupiter and confirmation of seven low-mass companions". Monthly Notices of the Royal Astronomical Society. 507 (2): 2856–2868. arXiv: 2107.14056 . Bibcode:2021MNRAS.507.2856F. doi:10.1093/mnras/stab2225.
  14. 1 2 3 Ghezzi, L.; Cunha, K.; Smith, V. V.; De Araújo, F. X.; Schuler, S. C.; de la Reza, R. (2010). "Stellar Parameters and Metallicities of Stars Hosting Jovian and Neptunian Mass Planets: A Possible Dependence of Planetary Mass on Metallicity". The Astrophysical Journal. 720 (2): 1290–1302. arXiv: 1007.2681 . Bibcode:2010ApJ...720.1290G. doi:10.1088/0004-637X/720/2/1290. S2CID   118565025.
  15. 1 2 3 Paletou, F.; Böhm, T.; Watson, V.; Trouilhet, J.-F. (2015). "Inversion of stellar fundamental parameters from ESPaDOnS and Narval high-resolution spectra". Astronomy & Astrophysics. 573: A67. arXiv: 1411.4859 . Bibcode:2015A&A...573A..67P. doi:10.1051/0004-6361/201424741. S2CID   118466868.
  16. ↑ Garg, Suyog; Karak, Bidya Binay; Egeland, Ricky; Soon, Willie; Baliunas, Sallie (2019), "Waldmeier Effect in Stellar Cycles", The Astrophysical Journal, 886 (2): 132, arXiv: 1909.12148 , Bibcode:2019ApJ...886..132G, doi: 10.3847/1538-4357/ab4a17 , S2CID   202888617
  17. ↑ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  18. ↑ "A Really Cool Star: The Dim, Low-Temperature GL 105C". HubbleSite. 14 September 1995. Retrieved 4 June 2017.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.