WASP-18
WASP-18 is a magnitude 9 star located in the Phoenix constellation of the southern hemisphere. It has a mass of 1.25 solar masses.

In 2009, the SuperWASP project announced that a large, hot Jupiter type extrasolar planet, "WASP-18b", was orbiting very close to this star.

Observations from the Chandra X-ray Observatory failed to find any X-rays coming from WASP-18, and it is thought that this is caused by WASP-18b disrupting the star's magnetic field by causing a reduction in convection in the star's atmosphere. Tidal forces from the planet may also explain the higher amounts of lithium measured in earlier optical studies of WASP-18.
Q124313
magnitude
Concept
Q523
star
Concept
Q10441
Phoenix
CEL
Q8928
constellation
Concept
Q41228
southern hemisphere
TIME
Q180892
solar mass
Concept
Q572830
SuperWASP
MISC
Q382979
hot Jupiter
CEL
Q44559
extrasolar planet
Concept
Q1061955
WASP-18b
CEL
Q49002
Chandra X-ray Observatory
MISC
Q34777
X-ray
Concept
Q11408
magnetic field
Concept
Q160329
convection
Concept
Q6311
star's atmosphere
Concept
Q568
lithium
Concept
Q1195144
WASP-18
CEL
Q1195144
WASP-18
CEL
Q1195144
WASP-18
CEL
Q1195144
WASP-18
CEL
2009-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2009
DATE
-18^^http://www.w3.org/2001/XMLSchema#decimal
-18
NUMBER
+9^^http://www.w3.org/2001/XMLSchema#decimal
9
NUMBER
+1.25^^http://www.w3.org/2001/XMLSchema#decimal
1.25
NUMBER
-18^^http://www.w3.org/2001/XMLSchema#decimal
-18
NUMBER
-18^^http://www.w3.org/2001/XMLSchema#decimal
-18
NUMBER
-18^^http://www.w3.org/2001/XMLSchema#decimal
-18
NUMBER
-18^^http://www.w3.org/2001/XMLSchema#decimal
-18
NUMBER
instance of
constellation
parent astronomical body
instance of
subclass of
instance of