RV Tauri

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Stern
RV Tauri
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation bull
Right ascension 04 h 47 m 6.72 s
declination + 26 ° 10 ′ 45.5 ″
Apparent brightness 9.8 (8.9 to 11.1) mag
Typing
B − V color index (1.5 to 1.9) 
U − B color index (0.9 to 1.8) 
Spectral class G2e Ia to M2 Ia
Variable star type RVB 
Astrometry
Radial velocity (30 ± 2) km / s
parallax 0.69 ± 0.06  mas
distance (4,700)  ly
(1,450)  pc
Visual absolute brightness M vis (−3.65) mag
Proper movement 
Rec. Share: (1.56 ± 1.55)  mas / a
Dec. portion: (−4.72 ± 1.10)  mas / a
Physical Properties
Dimensions (0.6)  M ☉
Luminosity

(3700)  L ☉

Effective temperature (4225 to 5080)  K
Metallicity [Fe / H] (−0.4)
Other names
and catalog entries
Bonn survey BD −25 ° 732
Henry Draper Catalog HD 283868 [1]
Tycho catalog TYC 1835-1075-1 [2]
2MASS catalog 2MASS J04470673 + 2610455 [3]
Other names RV Tauri

RV Tauri is a star just under 5000  light years away . It is the prototype of the RV Tauri stars , which belong to the pulsation-variable stars .

RV Tauri was discovered as a variable star in 1905 by Lidiya Tseraskaya, and in 1908 the regularity was confirmed. During a period of 78.5 days, the star shows 2 maxima with a magnitude of about 9.5 and 2 minima at 10.0 and 10.5, respectively. These strong fluctuations also ensure that the star would be assigned to a different spectral class depending on the situation - it fluctuates between G2 and M2.

RV Tauri is surrounded by a disk of dust and this has already been interpreted as a sign of a companion, which, however, has not yet been discovered. RV-Tauri is interpreted as a Post-AGB-Star , which in the further development will contract to a white dwarf , surrounded by a planetary nebula .

See also

Web links

Individual evidence

  1. ↑ a b c d RV Tau. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 8, 2018 .
  2. ↑ a b RV Tau. In: VSX. AAVSO, accessed September 8, 2018 .
  3. ↑ a b c d Dawson: A photometric investigation of RV Tauri and yellow semiregular variables . In: Astrophysical Journal Supplement Series . 41, 1979, p. 97. bibcode : 1979ApJS ... 41 ... 97D . doi : 10.1086 / 190610 .
  4. ↑ OG Taranova, VI Shenavrin, AM Tatarnikov: Infrared photometry for two RV Tau stars and V1027 Cyg . In: Astronomy Letters . 35, No. 7, 2009, p. 472. bibcode : 2009AstL ... 35..472T . doi : 10.1134 / S1063773709070044 .
  5. ↑ Glenn M. Wahlgren: The metallicity and luminosity of RV Tauri variables from medium-resolution spectra . In: Astronomical Journal . 104, 1992, p. 1174. bibcode : 1992AJ .... 104.1174W . doi : 10.1086 / 116306 .
  6. ↑ G. Stasińska, R. Szczerba, M. Schmidt, N .: Post-AGB stars as testbeds of nucleosynthesis in AGB stars . In: Astronomy and Astrophysics . 450, No. 2, 2006, p. 701. arxiv : astro-ph / 0601504 . bibcode : 2006A & A ... 450..701S . doi : 10.1051 / 0004-6361: 20053553 .
  7. ^ A b S. Ruyter: Strong dust processing in circumstellar discs around 6 RV Tauri stars. Are dusty RV Tauri stars all binaries? . In: Astronomy and Astrophysics . 435, No. 1, 2005, pp. 161-166. arxiv : astro-ph / 0503290v1 . bibcode : 2005A & A ... 435..161D . doi : 10.1051 / 0004-6361: 20041989 .
  8. ↑ Ceraski: Trois nouvelles variables . In: Astronomical News . 168, No. 2, 1905, p. 29. bibcode : 1905AN .... 168 ... 29C . doi : 10.1002 / asna.19051680207 .
  9. ^ Seares, Eli Stuart Haynes: The Variable RV Tauri (45.1905) . In: Laws Observatory Bulletin . 14, 1908, p. 215. bibcode : 1908LawOB..14..215S .
  10. ^ Isles: Variable Star Section . In: Journal of the British Astronomical Society . 85, 1975, p. 156. bibcode : 1975JBAA ... 85..156I .