Supertierra TOI-561b en una de las estrellas más viejas de la galaxia.
Científicos de la NASA están sorprendidos por el hallazgo de esta supertierra, TOI-561b, ya que es muy poco probable encontrar planetas tan grandes orbitando estrellas antiguas.
Supertierra TOI-561b en una de las estrellas más viejas de la galaxia.
Una supertierra rocosa y caliente, cerca de una de las estrellas más antiguas de nuestra galaxia, tomó por sorpresa a un equipo de científicos cazadores de planetas de la NASA.
Estos científicos no esperaban encontrar un planeta con tales características en el que quizás pudo albergar vida. El planeta es aproximadamente un 50 por ciento más grande que la Tierra, pero requiere menos de medio día para orbitar su estrella.
Por cada día que estás en la Tierra, este planeta orbita su estrella dos veces, dijo el astrofísico planetario Stephen Kane. Parte de la razón de la órbita corta es la proximidad del planeta a su estrella, que también crea un calor increíble. Su temperatura superficial promedio estimada es de más de 1,700 grados Celsius. Esto es demasiado caliente para albergar la vida como la conocemos hoy, aunque alguna vez pudo haber sido posible.
Además, Kane dijo que aunque el planeta tiene aproximadamente tres veces la masa de la Tierra, el equipo calculó que su densidad es la misma que la de nuestro planeta. Esto es sorprendente porque cabría esperar que la densidad fuera mayor dijo Kane en un comunicado. Esto es consistente con la noción de que el planeta es extremadamente antiguo.
Supertierra TOI-561b.
Cuanto más antiguo es un planeta, es probable que sea menos denso porque no había tantos elementos pesados disponibles cuando se formó, explicó Kane. Los elementos pesados se producen por reacciones de fusión en las estrellas a medida que envejecen.
Tarde o temprano las estrellas explotan, dispersando estos elementos a partir de los cuales se formarán nuevas estrellas y planetas. El descubrimiento del planeta TOI-561b y las observaciones adicionales que hizo el equipo sobre su composición, se publican en el Astronomical Journal.
TOI-561b es uno de los planetas rocosos más antiguos descubiertos hasta ahora, dijo Lauren Weiss, investigadora postdoctoral y líder del equipo de la Universidad de Hawaii.Su existencia muestra que el universo ha estado formando planetas rocosos casi desde sus inicios hace 14,000 millones de años.
TOI-561b, pertenece a una población rara de estrellas llamada disco grueso galáctico. Las estrellas en esta región son químicamente distintas, con menos elementos pesados como el hierro o el magnesio que se asocian con la construcción de planetas.
Cómo se halló.
El equipo de la Misión TESS utilizó el acceso de la Universidad de California al W.M. Observatorio Keck en Hawái, hogar de algunos de los telescopios científicamente más productivos de la Tierra, para confirmar la presencia del planeta TOI-561b.
El equipo del observatorio también ayudó al equipo a calcular la masa, la densidad y el radio del planeta. Los astrónomos están continuamente tratando de comprender la relación entre la masa y el radio de los planetas que encuentran.
Esta información brinda información sobre la estructura interior de los planetas que, con la tecnología actual, están demasiado lejos para visitarlos y tomar muestras.
La información sobre el interior de un planeta nos da una idea de si la superficie del planeta es habitable para la vida tal como la conocemos, dijo Kane. Aunque es poco probable que este planeta en particular esté habitado hoy en día, puede ser un presagio de muchos mundos rocosos aún por descubrir alrededor de las estrellas más antiguas de nuestra galaxia.
Supertierra TOI-561b en una de las estrellas más viejas de la galaxia.
Con infomación de Milenio.
Somos Extremo Mundial.
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