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PU Puppis

Topic: Astronomy

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Short description: Blue-giant star in the constellation Puppis
PU Puppis
Location of PU Puppis (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Puppis
Right ascension  07h 38m 18.04541s[1]
Declination −25° 21′ 53.3017″[1]
Apparent magnitude (V) 4.69[2]
Characteristics
Spectral type B8III[3]
U−B color index −0.35[4]
B−V color index −0.11[4]
Variable type β Lyr[5]
Astrometry
Radial velocity (Rv)+41.00[6] km/s
Proper motion (μ) RA: −3.03[1] mas/yr
Dec.: −7.42[1] mas/yr
Parallax (π)5.27 ± 0.26[1] mas
Distance620 ± 30 ly
(190 ± 9 pc)
Absolute magnitude (MV)−1.80 ± 0.25
(−1.77 + 5.85)[7]
Absolute bolometric
magnitude (Mbol)		−2.35 + 5.54[7]
Orbit[7]
Period (P)2.58237 ± 0.00005 d
Semi-major axis (a)13.30 ± 0.40 R☉
Inclination (i)56.2°
Details[7]
PU Pup A
Mass4.10 ± 0.20 M☉
Radius6.60 ± 0.30 R☉
Luminosity695 ± 80 L☉
Surface gravity (log g)3.40 ± 0.05 cgs
Temperature11500 ± 500 K
Rotational velocity (v sin i)123[8] km/s
PU Pup B
Mass0.65 ± 0.05 M☉
Radius0.90 ± 0.10 R☉
Luminosity0.50 ± 0.10 L☉
Surface gravity (log g)4.30 ± 0.10 cgs
Temperature5000 ± 350 K
Other designations
m Puppis, PU Pup, CD-25°4828, CCDM J07383-2522AB, GC 10266, HIP 37173, HR 2944, HD 61429, SAO 174175, WDS J07383-2522AB
Database references
SIMBADdata

PU Puppis (PU Pup) is a class B8III[3] (blue giant) star in the constellation Puppis. Its apparent magnitude is 4.69[2] and it is approximately 620 light years away based on parallax.[1]

A light curve for PU Puppis, plotted from TESS data[9]

It is a β Lyrae variable, ranging from 4.75 to 4.69 magnitude with a period of 2.58 days.[5] The secondary is estimated at about 5.6 magnitude, although recent observations have failed to confirm it.[10][11] The primary has a mass of 4.10 solar masses, and is radiating at an effective temperature of 11,500 K. The secondary, with a mass 65% that of the Sun, has a surface temperature of about 5,000 K.[7]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.  Vizier catalog entry
  2. ↑ 2.0 2.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.  Vizier catalog entry
  3. ↑ 3.0 3.1 Garrison, R. F.; Gray, R. O. (1994). "The late B-type stars: Refined MK classification, confrontation with stromgren photometry, and the effects of rotation". The Astronomical Journal 107: 1556. doi:10.1086/116967. Bibcode: 1994AJ....107.1556G. 
  4. ↑ 4.0 4.1 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
  5. ↑ 5.0 5.1 Samus, N. N. 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. 
  6. ↑ 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. doi:10.1002/asna.200710776. Bibcode: 2007AN....328..889K. 
  7. ↑ 7.0 7.1 7.2 7.3 7.4 Erdem, Ahmet; Sürgit, Derya; Banks, Timothy S.; Özkardeş, Burcu; Budding, Edwin (2021). "Absolute parameters of young stars: PU Pup". Research in Astronomy and Astrophysics 21 (10): 256. doi:10.1088/1674-4527/21/10/256. Bibcode: 2021RAA....21..256E. 
  8. ↑ Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. Bibcode: 2012A&A...537A.120Z.  Vizier catalog entry
  9. ↑ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html. 
  10. ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal 122 (6): 3466. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M.  Vizier catalog entry
  11. ↑ Tokovinin, Andrei; Mason, Brian D.; Hartkopf, William I. (2014). "Speckle Interferometry at Soar in 2012 and 2013". The Astronomical Journal 147 (5): 123. doi:10.1088/0004-6256/147/5/123. Bibcode: 2014AJ....147..123T. 



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