NW Puppis explained

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 .[1]

The star's variability was first detected in 1970 (based on observations made at La Silla Observatory), and announced by Armand van Hoof in 1973.[2] It was given its variable star designation in 1977.[3] Anamarija Stankov ruled this star out as a Beta Cephei variable,[4] but the GCVS and the International Variable Star Index classify it as both a Beta Cephei variable and a rotating ellipsoidal variable.[5] [6] The GCVS lists its period as 0.125 days, but the TESS data shows lower frequency and stochastic brightness variations.[5] [7]

Neither component of this double is given a letter in Lacaille's catalogue or the British Association star catalogue.[8] [9] Gould gave them the designations (Latin letter) v1 and v2 Puppis, but these are rarely used.[10] Lacaille applied the Greek letter υ to the star now called υ Carinae.[8] The designation υ2 first appeared in several catalogues at the end of the 19th century.[11]

Notes and References

  1. 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. 2012MNRAS.427..343M. 1208.2037 . 10.1111/j.1365-2966.2012.21873.x . free . 118665352.
  2. van Hoof . A. . Six New Variable B-Stars . Information Bulletin on Variable Stars . June 1973 . 807 . 1 . 1973IBVS..807....1V . 11 October 2024.
  3. Kukarkin . B. V. . Kholopov . P. N. . Fedorovich . V. P. . Kireyeva . N. N. . Kukarkina . N. P. . Medvedeva . G. I. . Perova . N. B. . 62nd Name-List of Variable Stars . Information Bulletin on Variable Stars . March 1977 . 1248 . 1 . 1977IBVS.1248....1K . 11 October 2024.
  4. Stankov. Anamarija. Handler. Gerald. Catalog of Galactic β Cephei Stars. The Astrophysical Journal Supplement Series. 158. 2. 2005. 193–216. 0067-0049. 10.1086/429408. astro-ph/0506495 . 2005ApJS..158..193S . 119526948.
  5. Web site: Query= NW Pup . General Catalog of Variable Stars . Lomonosov Moscow State University . 10 October 2024.
  6. Web site: NW Pup . International Variable Star Index . American Association of Variable Star Observers . 10 October 2024.
  7. Labadie-Bartz . Jonathan . Carciofi . Alex C. . Henrique de Amorim . Tajan . Rubio . Amanda . Luiz Figueiredo . André . Ticiani dos Santos . Pedro . Thomson-Paressant . Keegan . Classifying Be Star Variability With TESS. I. The Southern Ecliptic . The Astronomical Journal . May 2022 . 163 . 5 . 226 . 10.3847/1538-3881/ac5abd . free . 2010.13905 . 2022AJ....163..226L .
  8. Book: Coelum australe stelliferum .... 1763. H L Guerin & L F Delatour. 7–.
  9. 1845tcot.book.....B. 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. Baily. Francis. 1845.
  10. 2004yCat.4027....0K. 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. Kostjuk. N. D.. 2004.
  11. 1995yCat.5050....0H . 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 . Hoffleit . D. . Warren . W. H. . 1995 .

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "NW Puppis".

Except where otherwise indicated, Everything.Explained.Today is © Copyright 2009-2025, A B Cryer, All Rights Reserved. Cookie policy.