OU Puppis

Last updated
OU Puppis
Puppis constellation map.svg
Red circle.svg
Location of OU Puppis (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Puppis
Right ascension 07h 13m 13.35060s [1]
Declination −45° 10 57.8554 [1]
Apparent magnitude  (V)4.87 [2]
Characteristics
Spectral type A0pSi [3]
U−B color index −0.07 [4]
B−V color index −0.03 [4]
Variable type α2 CVn [5]
Astrometry
Radial velocity (Rv)+4.30 [6] km/s
Proper motion (μ)RA: −25.166 [1] mas/yr
Dec.: −87.380 [1] mas/yr
Parallax (π)17.3622±0.0768  mas [1]
Distance 187.9 ± 0.8  ly
(57.6 ± 0.3  pc)
Absolute magnitude  (MV)1.11 [2]
Details [1]
Mass 2.215  M
Radius 2.232  R
Luminosity 37.05  L
Surface gravity (log g)4.26 [7]   cgs
Temperature 9,568  K
Metallicity [Fe/H]−0.67  dex
Rotational velocity (v sin i)34 [7]  km/s
Age 382  Myr
Other designations
L1 Puppis, OU Pup, CD−44°3223, GC  9591, GSC  08119–01757, HIP  34899, HR  2746, HD  56022, SAO  218546
Database references
SIMBAD data

OU Puppis (OU Pup) is a chemically peculiar class A0 (white main-sequence) star in the constellation Puppis. Its apparent magnitude is about 4.9 and it is approximately 188 light-years away based on parallax.

A light curve for OU Puppis, plotted from TESS data OUPupLightCurve.png
A light curve for OU Puppis, plotted from TESS data

It is an α2 CVn variable, ranging from 4.93 to 4.86 magnitudes with a period of 0.92 of a day. [5] Its spectrum has unusually strong lines of silicon, chromium, and strontium, making it an Ap star. [9]

Unlike the majority of star pairs, the number attached to the Bayer designation 'L' is generally a subscript: L1. Its better-known companion L2 Puppis is similarly represented. [10]

References

  1. 1 2 3 4 5 6 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.
  2. 1 2 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. Vizier catalog entry
  3. Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H.
  4. 1 2 Mermilliod, J. C. (2006). "VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991)". VizieR On-line Data Catalog: II/168. Originally Published in: Institut d'Astronomie. 2168. Bibcode:2006yCat.2168....0M. Vizier catalog entry
  5. 1 2 Samus, 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.
  6. Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institution for Science. Bibcode:1953GCRV..C......0W. ISBN   9780598216885. LCCN   54001336.{{cite journal}}: ISBN / Date incompatibility (help)
  7. 1 2 David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv: 1501.03154 . Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. S2CID   33401607. Vizier catalog entry
  8. "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
  9. Renson, P.; Manfroid, J. (May 2009). "Catalogue of Ap, HgMn and Am stars". Astronomy and Astrophysics. 498 (3): 961–966. Bibcode:2009A&A...498..961R. doi: 10.1051/0004-6361/200810788 .
  10. Robert Burnham (1978). Burnham's Celestial Handbook: An Observer's Guide to the Universe Beyond the Solar System. Courier Corporation. ISBN   978-0-486-23673-5.