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Nu1 Lyrae

From Wikipedia, the free encyclopedia
Star in the constellation Lyra
For other stars with thisBayer designation, seeν Lyrae
ν1 Lyrae
Observation data
EpochJ2000.0      EquinoxJ2000.0 (ICRS)
ConstellationLyra
Right ascension18h 49m 45.91823s[1]
Declination+32° 48′ 46.1464″[1]
Apparent magnitude (V)5.91[2]
Characteristics
Spectral typeB3 IV[3]
U−Bcolor index−0.71[2]
B−Vcolor index−0.16[2]
Variable typeSuspected[4]
Astrometry
Radial velocity (Rv)−26.30±1.2[5] km/s
Proper motion (μ)RA: +1.540[1]mas/yr
Dec.: −3.721[1]mas/yr
Parallax (π)2.6879±0.0507 mas[1]
Distance1,210 ± 20 ly
(372 ± 7 pc)
Absolute magnitude (MV)−1.73[6]
Details
Mass6.9±0.1[3] M
Radius5.9[7] R
Luminosity1,460[8] L
Surface gravity (log g)3.86[9] cgs
Temperature14,534[8] K
Metallicity [Fe/H]−0.08[10] dex
Rotational velocity (v sin i)145[11] km/s
Age39.8±3.7[3] Myr
Other designations
ν1 Lyr,8 Lyr,BD+32°3227,HD 174585,HIP 92398,HR 7100,SAO 67441[12]
Database references
SIMBADdata

Nu1 Lyrae1 Lyrae) is astar in the northernconstellation ofLyra. Based upon an annualparallax shift of 2.69 mas as seen from Earth, it is located around 1,210 light years from theSun.[1] At that distance, the visual magnitude of the star is diminished by anextinction factor of 0.35 due tointerstellar dust.[6] With anapparent visual magnitude of 5.91,[2] the star is barely bright enough to be visible with the naked eye on a dark night.

This is a blue-white huedB-typesubgiant star with astellar classification of B3 IV.[3] It is a suspectedvariable.[4] The star has nearly seven times themass of the Sun and, at an estimated age of about 40[3] million years, is spinning with aprojected rotational velocity of 145 km/s.[11] It radiates approximately 1460 times thesolar luminosity from itsphotosphere at aneffective temperature of 14,534 K.[8]

Nu1 Lyrae has five faint visual companions listed in theWashington Double Star Catalog, the nearest being a magnitude 13.0 star at anangular separation of 33.7 arc seconds along aposition angle of 76°, as of 2015.[13]

References

[edit]
  1. ^abcdefVallenari, 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 atVizieR.
  2. ^abcdNicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System",Astronomy and Astrophysics Supplement Series,34:1–49,Bibcode:1978A&AS...34....1N.
  3. ^abcdeTetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun",Monthly Notices of the Royal Astronomical Society,410 (1):190–200,arXiv:1007.4883,Bibcode:2011MNRAS.410..190T,doi:10.1111/j.1365-2966.2010.17434.x,S2CID 118629873.
  4. ^abSamus, 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,Bibcode:2009yCat....102025S.
  5. ^Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system",Astronomy Letters,32 (11):759–771,arXiv:1606.08053,Bibcode:2006AstL...32..759G,doi:10.1134/S1063773706110065,S2CID 119231169.
  6. ^abGontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars",Astronomy Letters,38 (11):694–706,arXiv:1606.09028,Bibcode:2012AstL...38..694G,doi:10.1134/S1063773712110035,S2CID 119108982.
  7. ^McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017), "Fundamental parameters and infrared excesses of Tycho-Gaia stars",Monthly Notices of the Royal Astronomical Society,471 (1): 770,arXiv:1706.02208,Bibcode:2017MNRAS.471..770M,doi:10.1093/mnras/stx1433.
  8. ^abcMcDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars",Monthly Notices of the Royal Astronomical Society,427 (1):343–57,arXiv:1208.2037,Bibcode:2012MNRAS.427..343M,doi:10.1111/j.1365-2966.2012.21873.x,S2CID 118665352.
  9. ^Gerbaldi, M.; et al. (November 2001), "Binary systems with post-T Tauri secondaries",Astronomy and Astrophysics,379:162–184,Bibcode:2001A&A...379..162G,doi:10.1051/0004-6361:20011298.
  10. ^Cardiel, Nicolás; Zamorano, Jaime; Carrasco, Josep Manel; Masana, Eduard; Bará, Salvador; González, Rafael; Izquierdo, Jaime; Pascual, Sergio; Sánchez De Miguel, Alejandro (2021), "RGB photometric calibration of 15 million Gaia stars",Monthly Notices of the Royal Astronomical Society,507 (1): 318,arXiv:2107.08734,Bibcode:2021MNRAS.507..318C,doi:10.1093/mnras/stab2124.
  11. ^abAbt, Helmut A.; et al. (July 2002), "Rotational Velocities of B Stars",The Astrophysical Journal,573 (1):359–365,Bibcode:2002ApJ...573..359A,doi:10.1086/340590.
  12. ^"nu.01 Lyr",SIMBAD,Centre de données astronomiques de Strasbourg, retrieved2017-03-17.
  13. ^Mason, B. D.; et al. (2014),"The Washington Visual Double Star Catalog",The Astronomical Journal,122 (6):3466–3471,Bibcode:2001AJ....122.3466M,doi:10.1086/323920, retrieved2015-07-22.
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