COROT-2b

COROT-2b

Comparación de tamaño de COROT-2b con Júpiter.
Descubrimiento
Descubridor Alonso et al. (COROT) en Órbita Polar
Fecha 20 de diciembre de 2007
Método de detección Tránsito
Nombre provisional CoRoT-Exo-2b
Categoría planeta extrasolar
Estado Confirmado
Estrella madre
Orbita a CoRoT-2
Constelación Aquila
Ascensión recta (α) 19h 27m 06.5s[1]
Declinación (δ) +1° 23′ 01.5″[1]
Distancia estelar 930 años luz, (290 pc)
Tipo espectral G7V[2]
Elementos orbitales
Inclinación 87.84 ± 0.10[1]​°
Argumento del periastro 102 grados sexagesimales
Semieje mayor 0.0281 ± 0.0005[1][3]UA
Excentricidad 0 (presumido)[1]
Elementos orbitales derivados
Período orbital sideral 1.7429964 ± 0.0000017[1]días
Características físicas
Masa 3.31 ± 0.16[1]MJúpiter
Densidad 1310 ± 40[1]kg/
Radio 1.429 ± 0.047[1]​ MJúpiter
Gravedad 38.2[4]m/s2
Características atmosféricas
Temperatura 1537 ± 35[1]K
La tendencia de la velocidad radial de COROT-2, causada por la presencia de COROT-2 b.

COROT-2b (formalmente conocido como COROT-Exo-2b es el segundo planeta extrasolar detectado por el led francés COROT, orbita la estrella COROT-2 a una distancia de 930 años luz de la Tierra hacia la constelación Aquila. Su descubrimiento fue anunciado en diciembre de 2007.

Es un enorme Júpiter caliente, alrededor de 1.43 veces el radio de Júpiter y aproximadamente 3.3 veces más masivo. Su enrome tamaño se debe al calor de su estrella, lo que causa que las capas externas de la atmósfera condensen. El enorme radio de este planeta hace suponer que es realmente caliente, estimadamente alrededor de 1500 K, incluso más caliente de lo que se esperaría a su cercanía con su estrella. Esto podría ser una pista de que el planeta se calienta a través de fuerzas de marea causadas por las interacciones gravitatorias con otro planeta.

COROT-2b orbita su estrella en aproximadamente 1,7 días.[2]

Véase también

Referencias

  1. a b c d e f g h i j Alonso et al (2008). «Transiting exoplanets from the CoRoT space mission. II. CoRoT-Exo-2b: a transiting planet around an active G star». Astronomy and Astrophysics 482 (3): L21-L24. doi:10.1051/0004-6361:200809431. 
  2. a b Bouchy et al (2008). «Transiting exoplanets from the CoRoT space mission. III. The spectroscopic transit of CoRoT-Exo-2b with SOPHIE and HARPS». Astronomy and Astrophysics 482 (3): L25-L28. doi:10.1051/0004-6361:200809433. 
  3. The paper gives the semimajor axis as 6.70 ± 0.03 times the radius of the star, which is estimated at 0.902 ± 0.018 solar radii.
  4. Calculated using Newtonian gravity:

Enlaces externos

Coordenadas: Mapa celestial 19h 27m 06.5s, +01° 23′ 01.5″

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