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Exoplanetary Scratchpad

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Planets discovered during the UK-led SuperWASP (Wide Angle Search for Planets) program (see articles [1] [2]).

WASP Planets Web PagesEdit

WASP Planets In the NewsEdit

Sample (Year)Edit

Example SystemsEdit

WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE (2006)

  • Wasp1thumb-1-
    WASP-1 System - Has the first planet detected by the WASP program, which is the third "inflated" Hot Jupiter detected, which suggested these planets were fairly common. It was nicknamed "Garafía-1" after the municipality that hosts the Roque de Los Muchachos Observatory. Was the largest known exoplanet for about a year. Shows signs of atmospheric blow-off.


  • Wasp2thumb-1-
    WASP-2 System - Contains second planet discovered by WASP program. This planet is a rather heavy transiting planet, has a large rocky core, and conforms to present models (in contrast to WASP-1). One of the 6 out of 27 planets analyzed by the WASP team found to orbit backwards around its star in 2010. Shows signs of atmospheric blow-off.


WASP-3b: a strongly-irradiated transiting gas-giant planet (2007)

  • Wasp3thumb-1-
    WASP-3 System - One of three systems discovered by Super WASP containing a transiting very hot jupiter so close to its star that it is evaporating. Like the other two, WASP-4 and 5, it is incapable of radiating away heat from its star and instead swells up to significantly larger than Jupiter. This is a planet 81% more massive than Jupiter with 13% larger radius going around in just less day 2 days. Its transit time varies by up to 3 minutes, which indicates that a further planet may be in this system. This would be a further Neptunian planet and would be the first exoplanet detected by measuring eclipse timing deviations of an earlier discovered planet (Transit Timing Variation method). Further observations are needed to confirm the planet, but the best fit is that it is in 2:1 resonance with the larger planet. Planet b found to be in a low inclination prograde orbit with respect to its star's equator.


WASP-4b: A 12th Magnitude Transiting Hot Jupiter in the Southern Hemisphere (2007)

  • Wasp4thumb-1-
    WASP-4 System - One of three systems discovered by Super WASP containing a transiting very hot jupiter so close to its star that it is evaporating.


WASP-5b: a dense, very-hot Jupiter transiting a 12th-mag Southern-hemisphere star

  • Wasp5thumb-1-
    WASP-5 System - One of three systems discovered by Super WASP containing a transiting planet so close to its star that it is evaporating. A dense very hot jupiter, the densest known Jupiter mass planet at the time of its discovery (Mass is 63% more than Jupiter, Radius is 17% more). Found to orbit in the same manner as its star's rotation, while 6 out of 27 planets analyzed by the WASP team were found to orbit backwards around its star in 2010. Has a candidate planet detected by the Transit Timing Variation method.


Press release

Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star
  • Wasp6thumb-1-
    WASP-6 System - An inflated sub-Jupiter mass planet (50% Jupiter's mass, 22% more radius) orbiting a solar type star. Hubble studied its atmosphere.


WASP-7: The brightest transiting-exoplanet system in the Southern hemisphere
  • WASP-7 System - The brightest known transiting planet (hot enough to shine) in the southern hemisphere at the time of its discovery. Very similar to Jupiter in mass and radius, though at 26% higher density, it is one of the most dense known planets, indicative of a rocky core.
WASP-8b: a retrograde transiting planet in a multiple system
  • WASP-8 System - One of the 6 out of 27 planets analysed by the WASP team found to orbit backwards around its star in 2010. In a binary star system.
(Planet Retracted)
  • WASP-9 System - A star system with an apparent planet that was later retracted. This turned out to be a hierarchical triple containing a faint eclipsing binary pair. A combination of the eclipses of the stars and the strong rotation effects led to a false observational signature of a planet.
WASP-10b: a 3MJ, gas-giant planet transiting a late-type K star
  • WASP-10 System - System that contains a super Jupiter around an orange star. At first believed to be inflated, but later found to be smaller. Has a density similar to the moon. Has a candidate planet detected by the Transit Timing Variation method.
The sub-Jupiter mass transiting exoplanet WASP-11b
HAT-P-10b: A Light and Moderately Hot Jupiter Transiting A K Dwarf
  • WASP-11/HAT-P-10 System - Known as HAT-P-10 and WASP-11, it was detected independently by both teams. Contains a semi-Jovian that experienced the third lowest insolation (solar radiation per area) of any known transiting planets at the time.
WASP-12b: The hottest transiting planet yet discovered
  • WASP-12 System - The shortest period transiting Hot Jupiter known when discovered in 2008 and the first carbon-rich planet ever found (more Carbon than Oxygen). One of the two largest known planets at 1.79 Jupiter radii. Hottest known exoplanet at time of its discovery. Planet is being ripped apart by star. It is stretched in the shape of a rugby ball and leaves a ring around its star. Huge cloud of material detected around the planet containing elements never before detected on an exoplanet. This cloud is much larger than expected, and shrouds the entire star, making it undetectable at some wavelengths. Studying this cloud could reveal magnetic properties of the stellar system. Magnesium found in this shroud supports the blow-off theory where Hydrogen escapes from the planet so quickly other material is blown off with it. Two other Hot Jupiters are known to have planetary enveloping clouds, and others as close are expected to have similar system wide clouds, but not those further away. It has much more methane than water vapor. It may produce shock waves as it plows through its star's stellar wind (the first evidence of shocks around an exoplanet, like Earth and Saturn's bowshocks), possibly produced by a strong planetary magnetic field. This could protect its atmosphere from being stripped away. It could have a diamond core and other terrestrial planets in system would have black spots on them and also be carbon based. One of 5 exoplanets whose water abundance was measured by Hubble in 2013 and found to be less abundant than expected, probably due to a layer of haze or dust blocking detection..
The 0.5MJ transiting exoplanet WASP-13b
  • WASP-13 System - Contains 13th confirmed WASP planet. A normal Hot Jupiter with about half of Jupiter's mass.
WASP-14b: 7.3 MJ transiting planet in an eccentric orbit
  • WASP-14 System - Contains 14th confirmed WASP planet. One of the densest planets known. One of the most massive transiting exoplanets found (7.3 MJ). Has moderate eccentricity.
The low density transiting exoplanet WASP-15b
  • WASP-15 System - One of the 6 out of 27 planets analysed by the WASP team found to orbit backwards around its star in 2010. Contains one of the least dense known exoplanets.

More

  • WASP-16 System - Contains 16th confirmed WASP planet.
  • WASP-17 System - An F6 type star which has the first exoplanet discovered in a retrograde orbit. Also the largest known exoplanet at 1.74 RJ and 0.5 JM. Discovered by transit. It may be "flipping" its star's axis. Orbit hints at a near planetary collision in its early years. One of the 6 out of 27 planets analyzed by the WASP team found to orbit backwards around its star in 2010. It was found to be abundant in CO, depleted in water and methane. It lacks a prominent stratosphere and has efficient day-night energy circulation. Had one of the strongest water detection of the 5 exoplanets contrasted by Hubble in 2013, though still less intense than expected, probably due to dust clouds or a haze blocking its detection.
  • WASP-18 System - A hot F6 star that has an Inflated Very Hot Super Jupiter that is only 2.5 stellar radii from its host star. It may perish soon once it reaches its star's roche limit, but astronomers are puzzled why it hasn't already. Because it orbits much faster than its star rotates, tidal effects should be causing it to fall inwards. Further observations should reveal its rate of decay. Has the shortest period of any Hot Jupiter at the time of its discovery in 2009 (22hours). Extremely hot because of its close distance and brightness of its star, reaches 3000K. A very large planet with 70% more radius than Jupiter and 40% more mass. Very near to the Roche limit, it is expected to be elongated (football shaped). Initially thought to be slightly eccentric, this is not the case.
  • WASP-19 System - A Very Hot Jupiter with the shortest known period (19h) for a transiting planet at the time of its discovery late in 2009 and currently has the shortest known period for a Hot Jupiter. It's mass is slightly greater than Jupiter, but its diameter is 30% greater, making it as large as some small stars. The planet appeared brighter than expected, perhaps due to a lack of Titanian and Vanadian Oxides in the upper stratosphere (perhaps at a lower level so that it doesn't act as a dark layer). Molecules were not detected, but models suggest two possibilities, either a Carbon rich planet (plenty of CO and CH4) or a Oxygen rich planet (containing plenty of CO, CO2, and H2O). The planet is only at 1.2 times the Roche limit and likely moved inwards due to interactions with a third body. One of 5 exoplanets whose water abundance was measured by Hubble in 2013 and found to be less abundant than expected, probably due to a layer of haze or dust blocking detection.
  • WASP-20 System - Contains 20th confirmed WASP planet.
  • WASP-21 System - Contains 21st confirmed WASP planet.
  • WASP-22 System - Contains 22nd confirmed WASP planet.
  • WASP-23 System - Contains 23rd confirmed WASP planet.
  • WASP-24 System - Contains 24th confirmed WASP planet.
  • WASP-25 System - Contains 25th confirmed WASP planet.
  • WASP-26 System - Contains 26th confirmed WASP planet.
  • WASP-27 System - Contains 27th confirmed WASP planet.
  • WASP-28 System - Contains 28th confirmed WASP planet.
  • WASP-29 System - Contains a transiting Hot Saturn 80 parsecs away. The planet is about the same mass as Saturn (0.24 MJ) and 79% as massive as Jupiter. This is the smallest planet found so far by the WASP survey and the exoplanet most similar in mass and radius to Saturn. It orbits an Orange Dwarf, so is relatively cool for a Hot Jupiter. There are some indications that it also has an abundance of Carbon Monoxide, much like GJ 436b.

See AlsoEdit

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