NW Puppis

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NW Puppis
Observation data
Epoch J2000      Equinox J2000
Constellation Puppis
Right ascension 07h 18m 38.18632s[1]
Declination −36° 44′ 33.8557″[1]
Apparent magnitude (V) 5.11[2]
Characteristics
Spectral type B3 Vne
Variable type β Cep[2]
Astrometry
Radial velocity (Rv)+18.00±10[3] km/s
Proper motion (μ) RA: −10.848[1] mas/yr
Dec.: +6.699[1] mas/yr
Parallax (π)3.5875 ± 0.1683 mas[1]
Distance910 ± 40 ly
(280 ± 10 pc)
Details
Luminosity1,108[4] L☉
Surface gravity (log g)4.07±0.57[5] cgs
Temperature17,930±540[5] K
Rotational velocity (v sin i)80±8[5] km/s
Other designations
υ2 Pup, NW Pup, CD−36°3519, HD 57219, HIP 35406, HR 2790, SAO 197837
Database references
SIMBADdata

NW Puppis, also known as υ2 Puppis, is a star in the constellation Puppis. Located around 910 light-years distant, it shines with a luminosity approximately 1,108 times that of the Sun and has a surface temperature of 15,000 K.[4] Anamarija Stankov ruled this star out as a Beta Cephei variable.[6]

Neither component of this double is given a letter in Lacaille's catalogue or the British Association star catalogue.[7][8] Gould gave them the designations (Latin letter) v1 and v2 Puppis, but these are rarely used.[9] Lacaille applied the Greek letter υ to the star now called υ Carinae.[7] The designation υ2 first appeared in several catalogues at the end of the 19th century.[10]

References

  1. ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ a b 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.
  3. ^ Kharchenko, N. V.; Scholz, R.-D.; Piskunov, A. E.; Röser, S.; Schilbach, E. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. S2CID 119323941.
  4. ^ a b McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–57. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. S2CID 118665352.
  5. ^ a b c Zorec, J.; et al. (November 2016). "Critical study of the distribution of rotational velocities of Be stars. I. Deconvolution methods, effects due to gravity darkening, macroturbulence, and binarity". Astronomy & Astrophysics. 595: 26. Bibcode:2016A&A...595A.132Z. doi:10.1051/0004-6361/201628760. hdl:11336/37946.
  6. ^ Stankov, Anamarija; Handler, Gerald (2005). "Catalog of Galactic β Cephei Stars". The Astrophysical Journal Supplement Series. 158 (2): 193–216. arXiv:astro-ph/0506495. Bibcode:2005ApJS..158..193S. doi:10.1086/429408. ISSN 0067-0049. S2CID 119526948.
  7. ^ a b Coelum australe stelliferum ... H L Guerin & L F Delatour. 1763. pp. 7–.
  8. ^ Baily, Francis (1845). "The Catalogue of Stars of the British Association for the Advancement of Science". The Catalogue of Stars of the British Association for the Advancement of Science; Containing the Mean Right Ascensions and North Polar Distances of Eight Thousand Three Hundred and Seventy-Seven Fixed Stars. Bibcode:1845tcot.book.....B.
  9. ^ Kostjuk, N. D. (2004). "VizieR Online Data Catalog: HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002)". VizieR On-line Data Catalog: IV/27A. Originally Published in: Institute of Astronomy of Russian Academy of Sciences (2002). 4027. Bibcode:2004yCat.4027....0K.
  10. ^ 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.


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