11 Puppis

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11 Puppis
Puppis constellation map.svg
Red circle.svg
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  mas [1]
Distance 520 ± 20  ly
(160 ± 6  pc)
Absolute magnitude  (MV)−1.82 [2]
Details
Mass 2.7 [5]   M☉
Luminosity 515 [2]   L☉
Surface gravity (log g)1.99 [6]   cgs
Temperature 5,868 [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
SIMBAD data

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 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]

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References

  1. 1 2 3 4 5 6 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv: 0708.1752 . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID   18759600. Vizier catalog entry
  2. 1 2 3 4 5 6 7 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. 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
  4. 1 2 Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053 . Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID   119231169.
  5. 1 2 3 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. S2CID   119333383.
  6. 1 2 3 4 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 . S2CID   14878976.
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