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N Carinae

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N Carinae
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 06h 34m 58.57993s[1]
Declination −52° 58′ 32.1919″[1]
Apparent magnitude (V) 4.35[2]
Characteristics
Spectral type A0II[3] or B9III[4]
B−V color index −0.021±0.016[2]
Astrometry
Radial velocity (Rv)+22.5±0.5[2] km/s
Proper motion (μ) RA: -7.65[1] mas/yr
Dec.: +10.54[1] mas/yr
Parallax (π)2.39±0.13 mas[1]
Distance1,360 ± 70 ly
(420 ± 20 pc)
Absolute magnitude (MV)−3.75[2]
Details
Mass5.1[5] M☉
Radius20[6] R☉
Luminosity3,249[7] L☉
Surface gravity (log g)2.50[8] cgs
Temperature9,738[7] K
Rotational velocity (v sin i)47[9] km/s
Age87[5] Myr
Other designations
N Car, CPD−52°953, FK5 2508, GC 8604, HD 47306, HIP 31407, HR 2435, SAO 234589[10]
Database references
SIMBADdata

N Carinae is a single[11] star in the constellation Carina, just to the northeast of the prominent star Canopus. This object has a white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.35.[2] Based on parallax, it is located at a distance of approximately 1,360 light years from the Sun.[1] It has an absolute magnitude of −3.75,[2] and is drifting further away with a radial velocity of +22.5 km/s.[2]

This object has a stellar classification of A0II,[3] matching a massive bright giant. In the past it had received a class of B9III,[4] which is sometimes still used.[12] The star is 87 million years old with 5.1 times the mass of the Sun.[5] It is spinning with a projected rotational velocity of 47 km/s.[9] N Carinae is radiating 3,249 times the luminosity of the Sun from its photosphere at an effective temperature of 9,738 K.[7]

References

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  1. ^ a b c d e f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
  2. ^ a b c d e f g 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.
  3. ^ a b Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 2. Ann Arbor: Dept. of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
  4. ^ a b Eggen, O. J. (1962). "Space-velocity vectors for 3483 stars with proper motion and radial velocity". Royal Observatory Bulletin. 51. Bibcode:1962RGOB...51...79E.
  5. ^ a b c Borisov, Sviatoslav B.; Chilingarian, Igor V.; Rubtsov, Evgenii V.; Ledoux, Cédric; Melo, Claudio; Grishin, Kirill A.; Katkov, Ivan Yu.; Goradzhanov, Vladimir S.; Afanasiev, Anton V.; Kasparova, Anastasia V.; Saburova, Anna S. (2023). "New Generation Stellar Spectral Libraries in the Optical and Near-infrared. I. The Recalibrated UVES-POP Library for Stellar Population Synthesis". The Astrophysical Journal Supplement Series. 266 (1): 11. arXiv:2211.09130. Bibcode:2023ApJS..266...11B. doi:10.3847/1538-4365/acc321.
  6. ^ 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.
  7. ^ a b c Fetherolf, Tara; Pepper, Joshua; Simpson, Emilie; Kane, Stephen R.; Močnik, Teo; English, John Edward; Antoci, Victoria; Huber, Daniel; Jenkins, Jon M.; Stassun, Keivan; Twicken, Joseph D.; Vanderspek, Roland; Winn, Joshua N. (2023). "Variability Catalog of Stars Observed during the TESS Prime Mission". The Astrophysical Journal Supplement Series. 268 (1): 4. arXiv:2208.11721. Bibcode:2023ApJS..268....4F. doi:10.3847/1538-4365/acdee5.
  8. ^ Verberne, Sill; Koposov, Sergey E.; Rossi, Elena Maria; Marchetti, Tommaso; Kuijken, Konrad; Penoyre, Zephyr (2024). "Radial velocities from Gaia BP/RP spectra". Astronomy and Astrophysics. 684: A29. arXiv:2310.18101. Bibcode:2024A&A...684A..29V. doi:10.1051/0004-6361/202348406.
  9. ^ a b Royer, F.; et al. (January 2002). "Rotational velocities of A-type stars. I. Measurement of v sin i in the southern hemisphere". Astronomy and Astrophysics. 381: 105–121. arXiv:astro-ph/0110490. Bibcode:2002A&A...381..105R. doi:10.1051/0004-6361:20011422. S2CID 13133418.
  10. ^ "N Car". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-12.
  11. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
  12. ^ Tetzlaff, 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.
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