 A light curve for NW Puppis, plotted from TESS data, | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07 18 38.18632 |
| Declination | −36° 44′ 33.8557″ |
| Apparent magnitude (V) | 5.11 |
| Characteristics | |
| Spectral type | B3 Vne |
| Variable type | β Cep |
| Astrometry | |
| Radial velocity (Rv) | +18.00±10 km/s |
| Proper motion (μ) | RA: −10.848 mas/yr Dec.: +6.699 mas/yr |
| Parallax (π) | 3.5875 ± 0.1683 mas |
| Distance | 910 ± 40 ly (280 ± 10 pc) |
| Details | |
| Luminosity | 1,108 L☉ |
| Surface gravity (log g) | 4.07±0.57 cgs |
| Temperature | 17,930±540 K |
| Rotational velocity (v sin i) | 80±8 km/s |
| Other designations | |
| υ Pup, NW Pup, CD−36°3519, HD 57219, HIP 35406, HR 2790, SAO 197837 | |
| Database references | |
| SIMBAD | data |
NW Puppis, also known as υ 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.
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. It was given its variable star designation in 1977. Anamarija Stankov ruled this star out as a Beta Cephei variable, but the GCVS and the International Variable Star Index classify it as both a Beta Cephei variable and a rotating ellipsoidal variable. The GCVS lists its period as 0.125 days, but the TESS data shows lower frequency and stochastic brightness variations.
Neither component of this double is given a letter in Lacaille's catalogue or the British Association star catalogue. Gould gave them the designations (Latin letter) v and v Puppis, but these are rarely used. Lacaille applied the Greek letter υ to the star now called υ Carinae. The designation υ first appeared in several catalogues at the end of the 19th century.
References
- "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 27 September 2024.
- ^ 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.
- ^ 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.
- 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.
- ^ 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.
- ^ 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.
- van Hoof, A. (June 1973). "Six New Variable B-Stars" (PDF). Information Bulletin on Variable Stars. 807: 1. Bibcode:1973IBVS..807....1V. Retrieved 11 October 2024.
- Kukarkin, B. V.; Kholopov, P. N.; Fedorovich, V. P.; Kireyeva, N. N.; Kukarkina, N. P.; Medvedeva, G. I.; Perova, N. B. (March 1977). "62nd Name-List of Variable Stars" (PDF). Information Bulletin on Variable Stars. 1248: 1. Bibcode:1977IBVS.1248....1K. Retrieved 11 October 2024.
- 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.
- ^ "Query= NW Pup". General Catalog of Variable Stars. Lomonosov Moscow State University. Retrieved 10 October 2024.
- "NW Pup". International Variable Star Index. American Association of Variable Star Observers. Retrieved 10 October 2024.
- Labadie-Bartz, Jonathan; Carciofi, Alex C.; Henrique de Amorim, Tajan; Rubio, Amanda; Luiz Figueiredo, André; Ticiani dos Santos, Pedro; Thomson-Paressant, Keegan (May 2022). "Classifying Be Star Variability With TESS. I. The Southern Ecliptic". The Astronomical Journal. 163 (5): 226. arXiv:2010.13905. Bibcode:2022AJ....163..226L. doi:10.3847/1538-3881/ac5abd.
- ^ Coelum australe stelliferum ... H L Guerin & L F Delatour. 1763. pp. 7–.
- 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.
- 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.
- 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.
