PV Telescopii

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Star
PV Telescopii
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation telescope
Right ascension 18 h 23 m 14.66 s
declination -56 ° 37 ′ 44.1 ″
Apparent brightness 9.3 (9.24 to 9.40) mag
Typing
B − V color index (−0.1) 
U − B color index (−0.6) 
Spectral class B pec
Variable star type PVTELI 
Astrometry
Radial velocity (−169.6 ± 0.9) km / s
parallax (0.12 ± 0.04)  mas
Proper movement 
Rec. Share: (−1.09 ± 0.07)  mas / a
Dec. portion: (−7.71 ± 0.07)  mas / a
Physical Properties
Dimensions (0.95)  M ☉
radius (34)  R ☉
Effective temperature (12400)  K
Metallicity [Fe / H] (−0.15)
Other names
and catalog entries
Cordoba Survey CD −56 ° 7300
Henry Draper Catalog HD 168476 [1]
Hipparcos catalog HIP 90099 [2]
SAO catalog SAO 245434 [3]
Tycho catalog TYC 8752-2335-1 [4]
2MASS catalog 2MASS J18231466-5637441 [5]
Other names PV Telescopii

PV Telescopii is a star believed to be more than 20,000 light years away . It is the prototype of the PV Telescopii stars , which belong to the pulsation-variable stars .

The star appears to be in a late stage, before transitioning to a white dwarf . Presumably the star has already been in this state in the past and became a supergiant again with this special characteristic when it collided with a second white dwarf .

Individual evidence

  1. ↑ a b c d e f g h i j PV Tel. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 8, 2018 .
  2. ↑ a b PV Tel. In: VSX. AAVSO, accessed September 8, 2018 .
  3. ↑ a b c d C. S. Jeffery, RLC Starling, PW Hill, D. Pollacco: Cyclic and secular variation in the temperatures and radii of extreme helium stars . In: Monthly Notices of the Royal Astronomical Society . 321, 2001, p. 111. bibcode : 2001MNRAS.321..111J . doi : 10.1046 / j.1365-8711.2001.03992.x .
  4. ↑ KN Gourgouliatos, CS Jeffery: On the angular momentum evolution of merged white dwarfs . In: Monthly Notices of the Royal Astronomical Society . 371, No. 3, 2006, p. 1381. arxiv : astro-ph / 0607379 . bibcode : 2006MNRAS.371.1381G . doi : 10.1111 / j.1365-2966.2006.10780.x .