40 Aurigae Binary star in the constellation Auriga
40 Aurigae
Observation dataEpoch J2000 Equinox J2000
Constellation Auriga [ 1]
Right ascension 06h 06m 35.09752s [ 2]
Declination +38° 28′ 57.5285″ [ 2]
Apparent magnitude (V)5.345[ 3]
Characteristics
Evolutionary stage main sequence [ 2]
Spectral type A4m[ 4]
U−B color index
+0.11[ 5]
B−V color index
+0.23[ 5]
Astrometry Radial velocity (Rv )± 7.4[ 6] km/s Proper motion (μ) RA: +9.452[ 2] mas /yr Dec.: −54.087[ 2] mas /yr Parallax (π)9.1085± 0.0728 mas [ 2] Distance 358 ± 3 ly pc ) Absolute magnitude (MV )+0.26[ 1] Orbit [ 4] Period (P)28.28 d Eccentricity (e)0.56 Periastron epoch (T)JD 2420468.197 Argument of periastron (ω)178.4° Semi-amplitude 1 )51.4 km/s Semi-amplitude (K2 )62.5 km/s Details Mass 1.81[ 7] M ☉ Radius 4.62[ 7] R ☉ Luminosity 68[ 7] L ☉ Surface gravity (log g )± 0.08[ 8] cgs Temperature ± 52[ 8] K Metallicity [Fe/H] ± 0.05[ 8] dex Rotational velocity (v sin i )71[ 9] km/s Age 559[ 2] Myr Other designations AG +38°663BD +38°1377FK5 2465GC 7723HD 41357HIP 28946HR 2143SAO 58749PPM 71223PLX 1403TYC 2925-806-1GCRV 3828GSC 02925-00806IRAS 06031+38292MASS J06063509+3828578Database references SIMBAD data
40 Aurigae is a binary star in the constellation Auriga . Its apparent magnitude is 5.345,[ 3] parallax estimates made by the Hipparcos spacecraft, the system is located some 340 light-years (104 parsecs ) away.
40 Aurigae is a spectroscopic binary , meaning the two stars are too close to be individually resolved , but periodic Doppler shifts in their spectra indicate there must be orbital motion . In this case, light from both stars can be detected and it is a double-lined spectroscopic binary.[ 4] orbital period of 28.28 days and a fairly high eccentricity of 0.56.[ 4] A-type main-sequence star and shows unusual absorption lines in its spectrum, so it is an Am star [ 4] effective temperature of K [ 8]
References
1 2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. arXiv :1108.4971 Bibcode :2012AstL...38..331A . doi :10.1134/S1063773712050015 . XHIP record for this object at VizieR .1 2 3 4 5 6 7 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1. arXiv :2208.00211 Bibcode :2023A& A...674A...1G . doi :10.1051/0004-6361/202243940 S2CID 244398875 . Gaia DR3 record for this source at VizieR .1 2 Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics . 355 : L27– L30. Bibcode :2000A& A...355L..27H . 1 2 3 4 5 Pourbaix, D.; et al. (2004). "SB9 : The ninth catalogue of spectroscopic binary orbits". Astronomy and Astrophysics . 424 (2): 727– 732. arXiv :astro-ph/0406573 Bibcode :2004A& A...424..727P . doi :10.1051/0004-6361:20041213 . S2CID 119387088 . 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 . ↑ Kharchenko, N. V.; et al. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten . 328 (9): 889. arXiv :0705.0878 Bibcode :2007AN....328..889K . doi :10.1002/asna.200710776 . S2CID 119323941 . 1 2 3 Stassun, Keivan G.; et al. (2019). "The Revised TESS Input Catalog and Candidate Target List" . The Astronomical Journal . 158 (4): 138. arXiv :1905.10694 Bibcode :2019AJ....158..138S . doi :10.3847/1538-3881/ab3467 1 2 3 4 Koleva, M.; Vazdekis, A. (2012). "Stellar population models in the UV. I. Characterisation of the New Generation Stellar Library". Astronomy & Astrophysics . 538 : A143. arXiv :1111.5449 Bibcode :2012A& A...538A.143K . doi :10.1051/0004-6361/201118065 . S2CID 53999614 . ↑ Royer, F.; Grenier, S.; Baylac, M.-O.; Gómez, A. E.; Zorec, J. (2002). "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin I". Astronomy and Astrophysics . 393 : 897. arXiv :astro-ph/0205255 Bibcode :2002A& A...393..897R . doi :10.1051/0004-6361:20020943 .
