N Carinae

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N Carinae
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Carina [1]
Right ascension 06h 34m 58.580s [2]
Declination −52° 58′ 32.19″ [2]
Apparent magnitude  (V)4.35 [1]
Characteristics
Spectral type A0II [3] or B9III [4]
B−V color index −0.021±0.016 [1]
Astrometry
Radial velocity (Rv)+22.5±0.5 [1] km/s
Proper motion (μ)RA: −7.537 mas/yr [2]
Dec.: +10.643 mas/yr [2]
Parallax (π)1.9235±0.0926  mas [5]
Distance 1,700 ± 80  ly
(520 ± 30  pc)
Absolute magnitude  (MV)−3.75 [1]
Details
Mass 5.1 [6]   M☉
Radius 20 [7]   R☉
Luminosity 3,249 [8]   L☉
Surface gravity (log g)2.50 [9]   cgs
Temperature 9,738 [8]   K
Rotational velocity (v sin i)47 [10]  km/s
Age 87 [6]   Myr
Other designations
N Car, CPD−52°953, FK5 2508, GC 8604, HD 47306, HIP 31407, HR 2435, SAO 234589 [11]
Database references
SIMBAD data

N Carinae is a single star [12] in the constellation Carina, just to the northeast of the prominent star Canopus. Its name is a Bayer designation. This object has a white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.35. [1] Based on parallax, it is located at a distance of approximately 1,700  light years from the Sun. [2] It has an absolute magnitude of −3.75, [1] and is drifting further away with a radial velocity of +22.5 km/s. [1]

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. [13] The star is 87 million years old with 5.1 times the mass of the Sun. [6] It is spinning with a projected rotational velocity of 47 km/s. [10] N Carinae is radiating 3,249 times the luminosity of the Sun from its photosphere at an effective temperature of 9,738  K . [8]

References

  1. 1 2 3 4 5 6 7 8 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.
  2. 1 2 3 4 5 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.
  3. 1 2 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. 1 2 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. ↑ 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.
  6. 1 2 3 Borisov, Sviatoslav B.; et al. (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 .
  7. ↑ 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 .
  8. 1 2 3 Fetherolf, Tara; et al. (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 .
  9. ↑ Verberne, Sill; et al. (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.
  10. 1 2 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.
  11. ↑ "N Car". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-02-12.
  12. ↑ 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.
  13. ↑ 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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