CP Puppis

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Double star
CP Puppis
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Aft deck of the ship
Right ascension 08 h 09 m 52.11 s
declination -35 ° 12 ′ 3.5 ″
Apparent brightness 17.0 likes
Typing
rel. Brightness
(G-band) 		(15.06 ± 0.005) mag
rel. Brightness
(J-band) 		(14.34 ± 0.03) mag
B − V color index −2 
Spectral class Q
Variable star type NA / DQ 
Astrometry
Radial velocity 37.0 km / s
parallax (1.23 ± 0.021)  mas
distance 1,600  pc  
Proper movement 
Rec. Share: (1.9 ± 2.4)  mas / a
Dec. portion: (0.9 ± 2.4)  mas / a
Physical Properties
Rotation time 88.20 min
Other names
and catalog entries
2MASS catalog 2MASS J08114606-3521049 [1]
Other names AAVSO 0808-35, AN 86.1942, Hen 3-130, Nova Pup 1942, CSI-35-08099, 2E 1945,

Template: Infobox star / maintenance / magGTemplate: Infobox star / maintenance / magJ

CP Puppis (also Nova Puppis 1942 ) was one of the brightest and fastest novae of the 20th century. The first spectrograms of the Nova were recorded on November 11, 1942, at the Mount Wilson Observatory . Within three days of discovery, it rose from less than 17.0 m to the maximum V = −0.2 m . The time it took to decrease by 3.0 m (t3) was, at just 6.5 days, one of the shortest ever recorded for a nova.

The high flux in the X-ray range and its strong modulation with a very short orbital period of only 1.47 hours for novae can best be explained by a magnetic white dwarf with a high mass M> 1.1 M ☉ and a low accretion rate <1.6 × 10 Explain –10 M ☉ per year. The system is thus a cataclysmic variable (CV) and possibly belongs to the class of the DQ Herculis stars .

Web links

Individual evidence

  1. ↑ a b c d e f g V * CP Pup. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on March 29, 2019 .
  2. ↑ a b c d CP Pup. In: VSX. AAVSO , accessed March 29, 2019 .
  3. ^ A b M. Orio, K. Mukai, A. Bianchini, D. de Martino, S. Howell: New X-Ray Observations of the Old Nova CP Puppis and of the More Recent Nova V351 Puppis . In: The Astrophysical Journal . 690, 2009, p. 1753. bibcode : 2009ApJ ... 690.1753O . doi : 10.1088 / 0004-637X / 690/2/1753 .
  4. ↑ NOVA PUPPIS 1942. In: Humason, ML & Sanford, RF Publications of the Astronomical Society of the Pacific, Vol 54, No.. 321, p.256, accessed April 2, 2019 .