Binary star system in the constellation Hercules
106 Herculis is a variable star in the northern constellation Hercules . It is visible to the naked eye as a faint, red-hued point of light with a baseline apparent visual magnitude of 4.96.[ 3] Based on its parallax , it is estimated to lie 383 light-years (117 parsecs) away from the Sun.[ 4] The star is moving closer to the Earth with a heliocentric radial velocity of -35 km/s.[ 8]
Eggleton and Tokovinin (2008) listed this as a suspected binary star system consisting of two roughly equal components.[ 11] It appears as an ageing red giant with a stellar classification of M0III. This is a suspected semiregular variable star with a very small amplitude and a period of 40 days or more.[ 7] Having exhausted the supply of hydrogen at its core , it has expanded to 44[ 2] times the Sun's radius . It is radiating around 414[ 2] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of about 3,789 K.[ 4]
References
^ "MAST: Barbara A. Mikulski Archive for Space Telescopes" . Space Telescope Science Institute. Retrieved 27 November 2023 .
^ a b c d e f g h i Brown, A. G. A. ; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties" . Astronomy & Astrophysics . 616 . A1. arXiv :1804.09365 . Bibcode :2018A&A...616A...1G . doi :10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR .
^ a b J. R., Ducati (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues . 2237 . Bibcode :2002yCat.2237....0D .
^ a b c d e f Wu, Yue; et al. (2010). "Coudé-feed stellar spectral library – atmospheric parameters". Astronomy & Astrophysics . 525 : A71. arXiv :1009.1491 . Bibcode :2011A&A...525A..71W . doi :10.1051/0004-6361/201015014 . S2CID 53480665 .
^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data . Bibcode :1986EgUBV........0M .
^ 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 : B/gcvs. Bibcode :2009yCat....102025S .
^ a b Percy, John R. (1993). "The photometric variability of K giants" . Publications of the Astronomical Society of the Pacific . 105 : 1422. Bibcode :1993PASP..105.1422P . doi :10.1086/133324 .
^ a b c Soubiran, C.; Bienaymé, O.; Mishenina, T. V.; Kovtyukh, V. V. (2008). "Vertical distribution of Galactic disk stars". Astronomy & Astrophysics . 480 (1): 91– 101. arXiv :0712.1370 . Bibcode :2008A&A...480...91S . doi :10.1051/0004-6361:20078788 . S2CID 16602121 .
^ Zamanov, R. K.; et al. (October 2008). "Rotational velocities of the giants in symbiotic stars - III. Evidence of fast rotation in S-type symbiotics" . Monthly Notices of the Royal Astronomical Society . 390 (1): 377– 382. arXiv :0807.3817 . Bibcode :2008MNRAS.390..377Z . doi :10.1111/j.1365-2966.2008.13751.x . S2CID 118697261 .
^ "106 Her" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-06-17 .
^ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems" . Monthly Notices of the Royal Astronomical Society . 389 (2): 869– 879. arXiv :0806.2878 . Bibcode :2008MNRAS.389..869E . doi :10.1111/j.1365-2966.2008.13596.x . S2CID 14878976 .