OU Puppis

This article is about L₁ Puppis. For other stars with this Bayer designation, see L Puppis.

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]

OU Puppis

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
Mass	2.3[1] M☉
Radius	2.2[1] R☉
Luminosity	36.48[2] L☉
Surface gravity (log g)	4.26[7] cgs
Temperature	10,413[7] K
Metallicity [Fe/H]	−0.67[1] dex
Rotational velocity (v sin i)	34[7] km/s
Age	382[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
SIMBAD	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. 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. 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. 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. 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.
7. 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.