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HR 3407

From Wikipedia, the free encyclopedia
Star in the constellation Vela
This article is about C Velorum. For c Velorum, seeHD 78004.
HR 3407
Observation data
Epoch J2000      Equinox J2000
ConstellationVela
Right ascension08h 34m 43.59703s[1]
Declination–49° 56′ 39.1359″[1]
Apparent magnitude (V)5.01[2]
Characteristics
Evolutionary stagesupergiant
Spectral typeK1.5Ib[3]
U−Bcolor index+1.38[2]
B−Vcolor index+1.33[2]
Variable typemicrovariable[4]
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[5]
Details
Mass3.3±1.1[6] M
Radius73[7] R
Luminosity34.36 - 38.02[7] L
Surface gravity (log g)2.0[8] cgs
Temperature3,745±170[7] 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 southernconstellation ofVela. It has theBayer designationC Velorum;HR 3407 is the designation in theBright Star Catalogue.[9] It is an orange-hued star that is dimly visible to the naked eye with anapparent visual magnitude of 5.01.[2] The distance to this object is approximately 1,040 light years based onparallax measurements, and it is drifting further away with aradial velocity of 4 km/s.[1]

This object is an agingK-typesupergiant star with astellar classification of K1.5Ib.[3] It has about three[6] times themass of the Sun and has expanded to around 71[1] times theSun's radius. The latter is equivalent to 0.33 AU, or about one third the distance from the Sun to the Earth. It is spinning with aprojected 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.[4] It is radiating around 1,600 times theluminosity of the Sun from its enlargedphotosphere at aneffective temperature of 4,324 K.[1]

References

[edit]
  1. ^abcdefghiBrown, 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 atVizieR.
  2. ^abcdHoffleit, 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. ^abKeenan, 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.
  4. ^abKoen, 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.
  5. ^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.
  6. ^abStello, 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.
  7. ^abcMessineo, M.; Brown, A. G. A. (2019)."A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2".The Astronomical Journal.158 (1): 20.arXiv:1905.03744.Bibcode:2019AJ....158...20M.doi:10.3847/1538-3881/ab1cbd.S2CID 148571616.
  8. ^abcdLèbre, 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. ^ab"C Vel".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved2019-12-04.
  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.
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