WASP-14b

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WASP-14b
Extrasolar planet List of extrasolar planets
Exoplanet Comparison WASP-14 b.png
Size comparison of WASP-14b with Jupiter.
Parent star
Star WASP-14
Constellation Boötes
Right ascension (α) 14h 33m 06.356s[1]
Declination (δ) +21° 53′ 40.99″[1]
Apparent magnitude (mV) 9.75
Distance 520 ± 245 ly
(160 ± 75 pc)
Spectral type F5V
Orbital elements
Semimajor axis (a) 0.037+0.001
−0.002
AU
Periastron (q) 0.033 AU
Apastron (Q) 0.041 AU
Eccentricity (e) 0.095+0.004
−0.007
Orbital period (P) 2.243756+5E-6
−1E-6
d
Inclination (i) 84.79+0.52
−0.67
°
Argument of
periastron
(ω) 254.9+0.92
−1.72
°
Time of transit (Tt) 2454465.81963+0.00065
−0.00034
JD
Physical characteristics
Mass (m) 7.725+0.43
−0.67
MJ
Radius (r) 1.259+0.08
−0.058
RJ
Density (ρ) 5133 kg m-3
Surface gravity (g) 126.2 m/s² (12.87 g)
Temperature (T) 2800 K
Discovery information
Discovery date April 1, 2008
Discoverer(s) Cameron et al. (SuperWASP)
Discovery method Transit
Discovery site SAAO
Discovery status Published[2]
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBAD data

WASP-14b is an extrasolar planet discovered in 2008 by SuperWASP using the transit method. Follow-up radial velocity measurements showed that the mass of WASP-14b is almost eight times larger than that of Jupiter. The radius found by the transit observations show that it has a radius 25% larger than Jupiter. This makes WASP-14b one of the densest exoplanets known.[2] Its radius best fits the model of Fortney.[3]

The radial velocity of WASP-14 over time, caused by the presence of WASP-14 b.
Artist's impression of WASP-14b

Rotation[edit]

As of August 2008, the most recent calculation of WASP-14b's Rossiter-McLaughlin effect and so spin-orbit angle was that of Joshi.[4] This is −14 ± 17 degrees. It is too eccentric for its age and so is possibly pulled into its orbit by another planet.[2]

References[edit]

  1. ^ a b Zacharias, N. et al. (2013). "The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)". The Astronomical Journal 145 (2). 44. arXiv:1212.6182. Bibcode:2013AJ....145...44Z. doi:10.1088/0004-6256/145/2/44. Vizier catalog entry
  2. ^ a b c Joshi, Y. C. et al. (2008). "WASP-14b: A 7.7 Mjup transiting exoplanet in an eccentric orbit". Monthly Notices of the Royal Astronomical Society 392 (4): 1532–1538. arXiv:0806.1478. Bibcode:2009MNRAS.392.1532J. doi:10.1111/j.1365-2966.2008.14178.x. 
  3. ^ Fortney et al.; Marley, M. S.; Barnes, J. W. (2007). "Planetary Radii across Five Orders of Magnitude in Mass and Stellar Insolation: Application to Transits". The Astrophysical Journal 659 (2): 1661–1672. arXiv:astro-ph/0612671. Bibcode:2007ApJ...659.1661F. doi:10.1086/512120. 
  4. ^ Winn, Joshua N. (2008). "Measuring accurate transit parameters". Proceedings of the International Astronomical Union 4: 99. arXiv:0807.4929v2. doi:10.1017/S174392130802629X. 


External links[edit]

Media related to WASP-14b at Wikimedia Commons

Coordinates: Sky map 14h 33m 06s, +21° 53′ 41″