The close binary nature of this star was discovered by Dutch American astronomer Dirk Reuyl in 1941, based upon an elongation of the star found in photographs.[3] The two stars in the Wolf 424 system orbit about each other with a semi-major axis of 4.1 AU and an eccentricity of 0.3. The stars have an orbital period of 15.5 years and have a combined apparent magnitude of about 12.5.
Wolf 424A is a cool main sequencered dwarfstar of approximately 0.14 solar masses (147 Jupiters) and a radius of 0.17 solar radii. Its companion, Wolf 424B, is a cool main sequencered dwarfstar of approximately 0.13 solar masses (136 Jupiters) and a radius of 0.14 solar radii. They are two of the dimmest known objects within 15 light years of the Sun. In 1967, it was discovered that both are flare stars that undergo random increases in luminosity. The system has been designated FL Virginis, and may experience sunspot activity. The stars may undergo variation in the level of flare activity over periods lasting several years.[4]
^Moffett, T. J. (January 1973). "Wolf 424: a neglected flare star". Monthly Notices of the Royal Astronomical Society. 164: 11–20. Bibcode:1973MNRAS.164...11M. doi:10.1093/mnras/164.1.11.
^ abCutri, 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.
^ abcdTorres, Guillermo; et al. (January 1999). "The Nearby Low-Mass Visual Binary Wolf 424". The Astronomical Journal. 117 (1): 562–573. Bibcode:1999AJ....117..562T. doi:10.1086/300708.
^Wilson, Ralph Elmer (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Washington: Carnegie Institution of Washington. Bibcode:1953GCRV..C......0W.
^ abcBrown, 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.
^ abcBrown, 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.
W. D. Heintz, "Astrometric study of 4 binary stars", 1972, Astronomical Journal, 77, 160.
Cohen, E. Richard; David R. Lide; George L. Trigg (2003). AIP Physics Desk Reference. Birkhäuser. p. 100. ISBN0-387-98973-0.
wolf, binary, star, system, comprising, dwarf, stars, distance, approximately, light, years, from, located, constellation, virgo, between, stars, virginis, virginis, ultraviolet, band, light, curve, virginis, adapted, from, moffett, 1972, plot, shows, intensit. Wolf 424 is a binary star system comprising two red dwarf stars at a distance of approximately 14 2 light years from the Sun It is located in the constellation Virgo between the stars e Virginis and o Virginis Wolf 424 A BAn ultraviolet band light curve for FL Virginis adapted from Moffett 1972 1 The plot shows intensity above the star s quiescent intensity Observation dataEpoch J2000 Equinox J2000 Constellation Virgo Right ascension 12h 33m 17 38s 2 Declination 09 01 15 8 2 Apparent magnitude V A 13 22 0 01 B 13 21 0 01 3 Characteristics Spectral type dM6e dM6e 4 U B color index 1 19 B V color index 1 84 Variable type Flare stars AstrometryWolf 424 ARadial velocity Rv 2 5 km sProper motion m RA 1710 468 0 554 6 mas yr Dec 203 098 0 451 6 mas yrParallax p 223 4775 0 4665 mas 6 Distance14 59 0 03 ly 4 475 0 009 pc Absolute magnitude MV 15 03 7 Wolf 424 BProper motion m RA 1795 661 0 565 8 mas yr Dec 217 789 0 550 8 mas yrParallax p 231 1185 0 5119 mas 8 Distance14 11 0 03 ly 4 327 0 010 pc Absolute magnitude MV 15 02 7 Orbit 3 PrimaryGJ 473 ACompanionGJ 473 BPeriod P 15 532 0 096 yrSemi major axis a 0 9257 0 0049 4 062 0 098 AU Eccentricity e 0 2950 0 0035Inclination i 103 00 0 15 Longitude of the node W 143 48 0 19 Periastron epoch T 1992 297 0 056Argument of periastron w secondary 347 2 1 5 DetailsMassA 0 143 0 011 B 0 131 0 010 3 M Other designationsFL Vir G 60 14 LFT 923 Ci 20 716 G 12 43 LHS 333 Cl Melotte 25 GJ 473 USNO B1 0 0990 00217846 GSC 00874 00306 LTT 13546 VVO 74 Wolf 424 2E 2769 JP11 5148 GCRV 7553 JP11 5149 PLX 2890 Database referencesSIMBADdataARICNSAB Wolf 424Location of Wolf 424 in the constellation Virgo The close binary nature of this star was discovered by Dutch American astronomer Dirk Reuyl in 1941 based upon an elongation of the star found in photographs 3 The two stars in the Wolf 424 system orbit about each other with a semi major axis of 4 1 AU and an eccentricity of 0 3 The stars have an orbital period of 15 5 years and have a combined apparent magnitude of about 12 5 Wolf 424A is a cool main sequence red dwarf star of approximately 0 14 solar masses 147 Jupiters and a radius of 0 17 solar radii Its companion Wolf 424B is a cool main sequence red dwarf star of approximately 0 13 solar masses 136 Jupiters and a radius of 0 14 solar radii They are two of the dimmest known objects within 15 light years of the Sun In 1967 it was discovered that both are flare stars that undergo random increases in luminosity The system has been designated FL Virginis and may experience sunspot activity The stars may undergo variation in the level of flare activity over periods lasting several years 4 See also editList of nearest stars and brown dwarfsReferences edit Moffett T J January 1973 Wolf 424 a neglected flare star Monthly Notices of the Royal Astronomical Society 164 11 20 Bibcode 1973MNRAS 164 11M doi 10 1093 mnras 164 1 11 a b 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 a b c d Torres Guillermo et al January 1999 The Nearby Low Mass Visual Binary Wolf 424 The Astronomical Journal 117 1 562 573 Bibcode 1999AJ 117 562T doi 10 1086 300708 a b Pettersen B R May 2006 Flare variability in the close binary FL Vir Monthly Notices of the Royal Astronomical Society 368 3 1392 1394 Bibcode 2006MNRAS 368 1392P doi 10 1111 j 1365 2966 2006 10210 x Wilson Ralph Elmer 1953 General Catalogue of Stellar Radial Velocities Carnegie Institute Washington D C Publication Washington Carnegie Institution of Washington Bibcode 1953GCRV C 0W a b c Brown A G A et al Gaia collaboration 2021 Gaia Early Data Release 3 Summary of the contents and survey properties Astronomy amp Astrophysics 649 A1 arXiv 2012 01533 Bibcode 2021A amp 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 a b Staff January 1 2010 List of the Nearest 100 Stellar Systems Research Consortium on Nearby Stars Retrieved 2011 07 01 a b c Brown A G A et al Gaia collaboration 2021 Gaia Early Data Release 3 Summary of the contents and survey properties Astronomy amp Astrophysics 649 A1 arXiv 2012 01533 Bibcode 2021A amp 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 W D Heintz Astrometric study of 4 binary stars 1972 Astronomical Journal 77 160 Cohen E Richard David R Lide George L Trigg 2003 AIP Physics Desk Reference Birkhauser p 100 ISBN 0 387 98973 0 External links editWolf 424 Data page Wolf 424 AB A NASA image of Wolf 424 AB V FL Vir SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved from https en wikipedia org w index php title Wolf 424 amp oldid 1219620427, wikipedia, wiki, book, books, library,
