Astronomy:OU Puppis

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Short description: Star in the constellation Puppis
OU Puppis
Puppis constellation map.svg
Red circle.svg
Location of OU Puppis (circled)
Observation data
Equinox J2000.0]] (ICRS)
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[1] mas
Distance187.9 ± 0.8 ly
(57.6 ± 0.3 pc)
Absolute magnitude (MV)1.11[2]
Details
Mass2.3[1] M
Radius2.2[1] R
Luminosity36.48[2] L
Surface gravity (log g)4.26[7] cgs
Temperature10,413[7] K
Metallicity [Fe/H]−0.67[1] dex
Rotational velocity (v sin i)34[7] km/s
Age382[1] 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
SIMBADdata

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[8]

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. Jump up to: 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 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.
  2. Jump up to: 2.0 2.1 2.2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode2012AstL...38..331A.  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. Bibcode1995yCat.5050....0H. 
  4. Jump up to: 4.0 4.1 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. Bibcode2006yCat.2168....0M. Vizier catalog entry
  5. Jump up to: 5.0 5.1 Samus, N. N. 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. Bibcode2009yCat....102025S. 
  6. Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication (Carnegie Institution for Science). ISBN 9780598216885. Bibcode1953GCRV..C......0W. 
  7. Jump up to: 7.0 7.1 7.2 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. doi:10.1088/0004-637X/804/2/146. Bibcode2015ApJ...804..146D.  Vizier catalog entry
  8. "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html. 
  9. Renson, P.; Manfroid, J. (May 2009). "Catalogue of Ap, HgMn and Am stars". Astronomy and Astrophysics 498 (3): 961–966. doi:10.1051/0004-6361/200810788. Bibcode2009A&A...498..961R. https://zenodo.org/record/890529. 
  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. https://books.google.com/books?id=PJzIt3SIlkUC.