Astronomy:N Carinae

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Short description: Star in the constellation Carina
N Carinae
Observation data
Equinox J2000.0]] (ICRS)
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[2] mas/yr
Dec.: +10.643[2] mas/yr
Parallax (π)1.9235 ± 0.0926[5] mas
Distance1,700 ± 80 ly
(520 ± 30 pc)
Absolute magnitude (MV)−3.75[1]
Details
Mass5.1[6] M☉
Radius20[7] R☉
Luminosity3,249[8] L☉
Surface gravity (log g)2.50[9] cgs
Temperature9,738[8] K
Rotational velocity (v sin i)47[10] km/s
Age87[6] Myr
Other designations
N Car, CPD−52°953, FK5 2508, GC 8604, HD 47306, HIP 31407, HR 2435, SAO 234589[11]
Database references
SIMBADdata

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. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. 2. Ann Arbor: Dept. of Astronomy, University of Michigan. Bibcode: 1978mcts.book.....H. 
  4. ↑ 4.0 4.1 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. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. 
  6. ↑ 6.0 6.1 6.2 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. doi:10.3847/1538-4365/acc321. Bibcode: 2023ApJS..266...11B. 
  7. ↑ Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  8. ↑ 8.0 8.1 8.2 Fetherolf, Tara et al. (2023). "Variability Catalog of Stars Observed during the TESS Prime Mission". The Astrophysical Journal Supplement Series 268 (1): 4. doi:10.3847/1538-4365/acdee5. Bibcode: 2023ApJS..268....4F. 
  9. ↑ Verberne, Sill et al. (2024). "Radial velocities from Gaia BP/RP spectra". Astronomy and Astrophysics 684: A29. doi:10.1051/0004-6361/202348406. Bibcode: 2024A&A...684A..29V. 
  10. ↑ 10.0 10.1 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. doi:10.1051/0004-6361:20011422. Bibcode: 2002A&A...381..105R. 
  11. ↑ "N Car". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=N+Car. 
  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. doi:10.1111/j.1365-2966.2008.13596.x. Bibcode: 2008MNRAS.389..869E. 
  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. doi:10.1111/j.1365-2966.2010.17434.x. Bibcode: 2011MNRAS.410..190T. 



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