Wasp-47 – wikipedia la gas


Prior to the discovery of its planets, WASP-47 was given the 2MASS designation of 2MASS J22044873-1201079. It was also observed by the Wide-field Infrared Survey Explorer and given the gas x tablets himalaya designation WISE J220448.74-120108.4. When observed by NASA’s K2 mission, it was given the Ecliptic Plane Input Catalog designation of EPIC 206103150, and later named K2-23 after the discovery f gas regulations 2015 of planets d and e.

In 2012, a team from the SuperWASP group, led by Coel Hellier, announced the discovery of a Hot Jupiter exoplanet, with the designation WASP-47b, orbiting every 4.17 days. [2] Three years later in 2015, Neveu-Van Malle et al. found a second planet, WASP-47c, orbiting within the habitable zone of the system using the HARPS spectrograph at the La Silla Observatory in Chile. [4] Using data from NASA’s K2 mission, Becker et al. (2015) found two more transiting planets, the Hot Neptune WASP-47d and the Mega-Earth WASP-47e, orbiting near WASP-47b. [3] Stellar characteristics [ edit ]

The star is very metal-rich, with a metallicity electricity word search ks2 ([Fe/H]) of about +0.36, or about twice the amount of iron and other elements heavier than Hydrogen and Helium than the Sun. [5] This would explain how two massive gas giants, as well as a Mega-Earth, were able to form around the same star. WASP-47 is estimated to have a luminosity of 1.16 L ☉. [6]

WASP-47 has a diverse and complex system of four planets. Three of them – e, b, and d – transit electricity meaning the host star, while WASP-47c was found with the radial velocity method. The first three have widely varying sizes, between 1.8 and 13 times the radius of Earth. They gas kinetic energy formula are also much more massive than Earth, with the least massive WASP-47e at 6.8 M ⊕. Both gas giants are significantly more massive than Jupiter, at 383 and 500 M ⊕, respectively. In comparison, Jupiter is about 318 M ⊕. However, because of the effects from Earth’s turbulent atmosphere, the mass values for all four planets have relatively high uncertainties, with WASP-47c having the greatest uncertainty. Despite that, the compositions for the planets are well-constrained. WASP-47e has almost no volatile materials (water gas jokes, hydrogen/helium), d has a thin gaseous envelope, and b and c are both gas giants like Jupiter and Saturn. [5]

The presence of two rather small planets, as well as the orbital la gasolina lyrics translation configuration of the first three planets, is not expected for Hot Jupiter systems, as a migrating gas giant is thought to kick out any small inner planets. In order for the system to come out the way it is now, the two gas bp gas card login giants likely would have to have formed before the lower-mass planets e and d. This is called two-stage planetary formation, and is predicted to have happened in our Solar system as well. It is predicted that WASP-47b would have moved inwards and brought planet-forming material close to the star. Once most of the gas dissipates, the two gas-poor planets form nearby the large Hot Jupiter. [8]

Planets e, b, and d have very similar orbits, with orbital electricity deregulation choices and challenges periods of 0.8, 4.2, and 9.1 days, respectively. All of them are very hot (≥1000 K) [9] and have very low orbital eccentricites, even lower than those of Earth. In stark contrast to the inner planets, c has an eccentric orbit (e = 0.36) lasting over 580 days ortega y gasset obras completas within the habitable zone of its host star. [5] The high eccentricity can’t be explained by the inward migration of WASP-47b, and there isn’t any secondary star to cause it. The only likely remaining explanation is that another massive planet altered the orbit of WASP-47c that is either further out in the system or was ejected billions of years ago. [8] See also [ edit ]