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OU Puppis

Topic: Astronomy

 From HandWiki - Reading time: 5 min

Short description: Star in the constellation Puppis
This page is about L1 Puppis. For other stars with this Bayer designation, see L Puppis.
OU Puppis
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[1]
Mass2.215 M☉
Radius2.232 R☉
Luminosity37.05 L☉
Surface gravity (log g)4.26[7] cgs
Temperature9,568 K
Metallicity [Fe/H]−0.67 dex
Rotational velocity (v sin i)34[7] km/s
Age382 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. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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. ↑ 2.0 2.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...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. Bibcode: 1995yCat.5050....0H. 
  4. ↑ 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. Bibcode: 2006yCat.2168....0M. Vizier catalog entry
  5. ↑ 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. Bibcode: 2009yCat....102025S. 
  6. ↑ Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication (Carnegie Institution for Science). ISBN 9780598216885. Bibcode: 1953GCRV..C......0W. 
  7. ↑ 7.0 7.1 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. Bibcode: 2015ApJ...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. Bibcode: 2009A&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. 



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