OGLE-TR-10 b
Encyclopedia
OGLE-TR-10b is an extrasolar planet
orbiting the star OGLE-TR-10
.
The planet was first detected by the Optical Gravitational Lensing Experiment
(OGLE) survey in 2002. The star, OGLE-TR-10
, was seen dimming by a tiny amount every 3 day
s. The transit lightcurve resembles that of HD 209458 b
, the first transiting extrasolar planet
. However, the mass of the object had to be measured by the radial velocity method, because other objects like red dwarf
s and brown dwarf
s can mimic the planetary transit. In late 2004 it was confirmed as the 5th planetary discovery by OGLE.
The planet is a typical "hot Jupiter
", a planet with a mass half that of Jupiter
and orbital distance only 1/24th that of Earth from the Sun. One revolution around the star takes a little over three day
s to complete. The planet is slightly larger than Jupiter
, probably due to the heat from the star.
OGLE-TR-10
was identified as a promising candidate by the OGLE
team during their 2001 campaign in three fields towards the Galactic Center
.
The possible planetary nature of its companion was based on spectroscopic follow-up.
A reported a tentative radial velocity semi-amplitude (from Keck-I/HIRES) of 100+/-43 m/s, and a mass for the putative planet of 0.7 +/- 0.3 MJup was confirmed in 2004 with the UVES/FLAMES radial velocities. However, the possibility of a blend could not be ruled out.
A blend scenario as an alternative explanation from an analysis combining all available radial velocity measurements with the OGLE light curve. OGLE-TR-10b has a mass of 0.57 +/- 0.12 MJup and a radius of 1.24 +/- 0.09 RJup. These parameters bear close resemblance to those of the first known transiting extrasolar planet, HD 209458 b
.
Note that the planets with the longer periods in the hot Jupiter
class all have small masses (~0.7 MJup), while all the short-period planets (i.e., very hot Jupiters) have masses roughly twice as large. This trend may be related to the survival of planets in proximity to their parent stars
.
Extrasolar planet
An extrasolar planet, or exoplanet, is a planet outside the Solar System. A total of such planets have been identified as of . It is now known that a substantial fraction of stars have planets, including perhaps half of all Sun-like stars...
orbiting the star OGLE-TR-10
OGLE-TR-10
OGLE-TR-10 is a distant, magnitude 16 star in the constellation of Sagittarius. It is located near the Galactic Center.This star is listed as a eclipsing type variable star with the eclipse due to the passage of the planet as noted in the discovery papers.-Planetary system:This star is home to...
.
The planet was first detected by the Optical Gravitational Lensing Experiment
Optical Gravitational Lensing Experiment
The Optical Gravitational Lensing Experiment or OGLE is a Polish astronomical project based at the University of Warsaw that is chiefly concerned with discovering dark matter using the microlensing technique. Since the project began in 1992, it has discovered several extrasolar planets as a side...
(OGLE) survey in 2002. The star, OGLE-TR-10
OGLE-TR-10
OGLE-TR-10 is a distant, magnitude 16 star in the constellation of Sagittarius. It is located near the Galactic Center.This star is listed as a eclipsing type variable star with the eclipse due to the passage of the planet as noted in the discovery papers.-Planetary system:This star is home to...
, was seen dimming by a tiny amount every 3 day
Day
A day is a unit of time, commonly defined as an interval equal to 24 hours. It also can mean that portion of the full day during which a location is illuminated by the light of the sun...
s. The transit lightcurve resembles that of HD 209458 b
HD 209458 b
HD 209458 b is an extrasolar planet that orbits the Solar analog star HD 209458 in the constellation Pegasus, some 150 light-years from Earth's solar system, with evidence of water vapor....
, the first transiting extrasolar planet
Extrasolar planet
An extrasolar planet, or exoplanet, is a planet outside the Solar System. A total of such planets have been identified as of . It is now known that a substantial fraction of stars have planets, including perhaps half of all Sun-like stars...
. However, the mass of the object had to be measured by the radial velocity method, because other objects like red dwarf
Red dwarf
According to the Hertzsprung-Russell diagram, a red dwarf star is a small and relatively cool star, of the main sequence, either late K or M spectral type....
s and brown dwarf
Brown dwarf
Brown dwarfs are sub-stellar objects which are too low in mass to sustain hydrogen-1 fusion reactions in their cores, which is characteristic of stars on the main sequence. Brown dwarfs have fully convective surfaces and interiors, with no chemical differentiation by depth...
s can mimic the planetary transit. In late 2004 it was confirmed as the 5th planetary discovery by OGLE.
The planet is a typical "hot Jupiter
Hot Jupiter
Hot Jupiters are a class of extrasolar planet whose mass is close to or exceeds that of Jupiter...
", a planet with a mass half that of Jupiter
Jupiter
Jupiter is the fifth planet from the Sun and the largest planet within the Solar System. It is a gas giant with mass one-thousandth that of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. Jupiter is classified as a gas giant along with Saturn,...
and orbital distance only 1/24th that of Earth from the Sun. One revolution around the star takes a little over three day
Day
A day is a unit of time, commonly defined as an interval equal to 24 hours. It also can mean that portion of the full day during which a location is illuminated by the light of the sun...
s to complete. The planet is slightly larger than Jupiter
Jupiter
Jupiter is the fifth planet from the Sun and the largest planet within the Solar System. It is a gas giant with mass one-thousandth that of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. Jupiter is classified as a gas giant along with Saturn,...
, probably due to the heat from the star.
OGLE-TR-10
OGLE-TR-10
OGLE-TR-10 is a distant, magnitude 16 star in the constellation of Sagittarius. It is located near the Galactic Center.This star is listed as a eclipsing type variable star with the eclipse due to the passage of the planet as noted in the discovery papers.-Planetary system:This star is home to...
was identified as a promising candidate by the OGLE
Ogle
Ogle may refer to:*ogle, to stareas, or from, a surname* The Ogle family of Northumberland, England** Benjamin Ogle, Governor of Maryland from 1798 to 1801** Sir Chaloner Ogle, 1st Baronet , British Admiral...
team during their 2001 campaign in three fields towards the Galactic Center
Galactic Center
The Galactic Center is the rotational center of the Milky Way galaxy. It is located at a distance of 8.33±0.35 kpc from the Earth in the direction of the constellations Sagittarius, Ophiuchus, and Scorpius where the Milky Way appears brightest...
.
The possible planetary nature of its companion was based on spectroscopic follow-up.
A reported a tentative radial velocity semi-amplitude (from Keck-I/HIRES) of 100+/-43 m/s, and a mass for the putative planet of 0.7 +/- 0.3 MJup was confirmed in 2004 with the UVES/FLAMES radial velocities. However, the possibility of a blend could not be ruled out.
A blend scenario as an alternative explanation from an analysis combining all available radial velocity measurements with the OGLE light curve. OGLE-TR-10b has a mass of 0.57 +/- 0.12 MJup and a radius of 1.24 +/- 0.09 RJup. These parameters bear close resemblance to those of the first known transiting extrasolar planet, HD 209458 b
HD 209458 b
HD 209458 b is an extrasolar planet that orbits the Solar analog star HD 209458 in the constellation Pegasus, some 150 light-years from Earth's solar system, with evidence of water vapor....
.
Note that the planets with the longer periods in the hot Jupiter
Hot Jupiter
Hot Jupiters are a class of extrasolar planet whose mass is close to or exceeds that of Jupiter...
class all have small masses (~0.7 MJup), while all the short-period planets (i.e., very hot Jupiters) have masses roughly twice as large. This trend may be related to the survival of planets in proximity to their parent stars
Star
A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...
.