HR 3407

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This article is about C Velorum. For c Velorum, see HD 78004.
HR 3407
Observation data
Epoch J2000      Equinox J2000
Constellation Vela
Right ascension 08h 34m 43.59703s[1]
Declination −49° 56′ 39.1359″[1]
Apparent magnitude (V) 5.01[2]
Characteristics
Evolutionary stage Giant star[3]
Spectral type K1.5Ib[4]
U−B color index +1.38[2]
B−V color index +1.33[2]
Variable type microvariable[5]
Astrometry
Radial velocity (Rv)4.25±0.17[1] km/s
Proper motion (μ) RA: −14.236±0.322[1] mas/yr
Dec.: +18.540±0.353[1] mas/yr
Parallax (π)3.1501±0.1571 mas[1]
Distance1,040 ± 50 ly
(320 ± 20 pc)
Absolute magnitude (MV)–2.06[6]
Details
Mass3.3±1.1[3] M☉
Radius56[7] R☉
Luminosity1,010±131[3] L☉
Surface gravity (log g)2.0[8] cgs
Temperature4,245[3] K
Metallicity [Fe/H]−0.4[8] dex
Rotational velocity (v sin i)4.1[8] km/s
Other designations
C Vel, CD−49°3646, FK5 2674, HD 73155, HIP 42088, HR 3407, SAO 220138[9]
Database references
SIMBADdata

HR 3407 is a single[10] star in the southern constellation of Vela. It has the Bayer designation C Velorum; HR 3407 is the designation in the Bright Star Catalogue.[9] It is an orange-hued star that is dimly visible to the naked eye with an apparent visual magnitude of 5.01.[2] The distance to this object is approximately 1,040 light years based on parallax measurements, and it is drifting further away with a radial velocity of 4 km/s.[1]

This star has stellar classification of K1.5Ib,[4] which would suggest it is a supergiant, but is actually a giant star according to modern studies.[3] It has about three times the mass of the Sun[3] and has expanded to around 56 times the Sun's radius.[7] The latter is equivalent to 0.26 AU. It is spinning with a projected rotational velocity of 4.1.[8] The star displays microvariability with a period of 10.99 cycles per day and an amplitude of 0.0036 in magnitude.[5] It is radiating around 1,010 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,245 K.[3]

References

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  1. ^ a b c d e f g 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.
  2. ^ a b c d Hoffleit, D.; Warren, W. H. (1995), "Bright Star Catalogue", VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H, 5050 (5th Revised ed.), Bibcode:1995yCat.5050....0H.
  3. ^ a b c d e f g Stello, D.; et al. (2008), "Oscillating K Giants with the WIRE Satellite: Determination of Their Asteroseismic Masses", The Astrophysical Journal Letters, 674 (1): L53 – L56, arXiv:0801.2155, Bibcode:2008ApJ...674L..53S, doi:10.1086/528936, S2CID 15094067.
  4. ^ a b Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins Catalog of Revised MK Types for the Cooler Stars", The Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373, S2CID 123149047.
  5. ^ a b Koen, Chris; Eyer, Laurent (2002), "New periodic variables from the Hipparcos epoch photometry", Monthly Notices of the Royal Astronomical Society, 331 (1): 45–59, arXiv:astro-ph/0112194, Bibcode:2002MNRAS.331...45K, doi:10.1046/j.1365-8711.2002.05150.x, S2CID 10505995.
  6. ^ 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, S2CID 119257644.
  7. ^ a b McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017-10-01), "Fundamental parameters and infrared excesses of Tycho-Gaia stars", Monthly Notices of the Royal Astronomical Society, 471: 770–791, arXiv:1706.02208, Bibcode:2017MNRAS.471..770M, doi:10.1093/mnras/stx1433, ISSN 0035-8711 HR 3407's database entry at VizieR.
  8. ^ a b c d Lèbre, A.; de Laverny, P.; Do Nascimento, J. D. Jr.; de Medeiros, J. R. (May 2006), "Lithium abundances and rotational behavior for bright giant stars" (PDF), Astronomy and Astrophysics, 450 (3): 1173–1179, Bibcode:2006A&A...450.1173L, doi:10.1051/0004-6361:20053485.
  9. ^ a b "C Vel". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-04.
  10. ^ 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, S2CID 119257644.