11 Puppis

11 Puppis is a single[9] star in the southern constellation of Puppis, located approximately 522 light years away based on parallax.[1] It has the Bayer designation j Puppis; 11 Puppis is the Flamsteed designation. This object is visible to the naked eye as a faint, yellow-white star with an apparent visual magnitude of 4.20.[2] It is moving further from the Earth with a heliocentric radial velocity of +13.3 km/s.[4]

This article is about j Puppis. For J Puppis, see HD 64760.
11 Puppis
Location of 11 Puppis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Puppis
Right ascension  07h 56m 51.53900s[1]
Declination −22° 52′ 48.4340″[1]
Apparent magnitude (V) 4.20[2]
Characteristics
Spectral type F7/8 II[2]
U−B color index +0.44[3]
B−V color index +0.72[3]
Astrometry
Radial velocity (Rv)+13.30[4] km/s
Proper motion (μ) RA: −30.42[1] mas/yr
Dec.: +11.49[1] mas/yr
Parallax (π)6.25 ± 0.23[1] mas
Distance520 ± 20 ly
(160 ± 6 pc)
Absolute magnitude (MV)−1.82[2]
Details
Mass2.7[5] M☉
Luminosity515[2] L☉
Surface gravity (log g)1.99[6] cgs
Temperature5,868[6] K
Metallicity [Fe/H]+0.09[6] dex
Rotational velocity (v sin i)13.8[7] km/s
Other designations
j Pup, 11 Pup, BD−22°2087, CD−22°5403, FK5 2615, GC 10756, HD 65228, HIP 38835, HR 3102, SAO 174852, GSC 06553-03890[8]
Database references
SIMBADdata

This is an evolved bright giant star with a stellar classification of F7/8 II.[2] The spectrum displays a deficit of carbon, an excesses of nitrogen, and a high abundance of lithium.[5] The first two anomalies suggest the giant has passed through a deep convection stage that would have also exhausted the lithium supply, indicating the current lithium abundance is of recent production. The star has 2.7[5] times the mass of the Sun and is radiating 515[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,868 K.[6]

References
  1. Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  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. Vizier catalog entry
  3. 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
  4. Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  5. Lyubimkov, L. S.; Petrov, D. V. (September 2017). "Analysis of the Non-LTE Lithium Abundance for a Large Sample of F-, G-, and K-Giants and Supergiants". Astrophysics. 60 (3): 333–347. arXiv:1710.04852. Bibcode:2017Ap.....60..333L. doi:10.1007/s10511-017-9487-4.
  6. Earle Luck, R. (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal. 147 (6): 137. Bibcode:2014AJ....147..137L. doi:10.1088/0004-6256/147/6/137.
  7. De Medeiros, J. R.; Mayor, M. (1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series. 139 (3): 433. arXiv:astro-ph/0608248. Bibcode:1999A&AS..139..433D. doi:10.1051/aas:1999401. Vizier catalog entry
  8. "j Pup". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 September 2012.
  9. 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. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x.
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