Video Experimental Relacionado
Updated: May 22, 2026
06:48
Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
Published on: May 10, 2020
La detección y caracterización de un planeta no en tránsito por variaciones en el tiempo de tránsito
David Nesvorný1, David M Kipping, Lars A Buchhave
1Department of Space Studies, Southwest Research Institute, Boulder, CO 80302, USA. davidn@boulder.swri.edu
Science (New York, N.Y.)
|May 15, 2012
Resumen
La misión Kepler descubrió un sistema exoplanetario único, KOI-872, con dos planetas confirmados y un candidato. Este sistema exhibe grandes variaciones en el tiempo de tránsito, lo que sugiere una dinámica orbital compleja y una disposición potencialmente ordenada.
Área de la Ciencia:
- Ciencia exoplanetaria Ciencia de los exoplanetas.
- La astrofísica estelar es la astrofísica estelar.
- La astronomía dinámica es una astronomía dinámica.
Sus antecedentes:
- La misión Kepler monitorea continuamente el brillo estelar para detectar exoplanetas a través de tránsitos.
- El proyecto The Hunt for Exomoons with Kepler (HEK) analiza los datos de Kepler para los sistemas planetarios.
- KOI-872 presenta un sistema de interés debido a las variaciones de tiempo de tránsito observadas.
Objetivo del estudio:
- Para analizar el sistema KOI-872 utilizando los datos de Kepler disponibles públicamente.
- Para confirmar y caracterizar planetas dentro del sistema KOI-872.
- Para investigar las interacciones dinámicas y la arquitectura orbital.
Principales métodos:
- Análisis fotométrico de las curvas de luz de Kepler para identificar planetas en tránsito.
- Modelado dinámico para determinar la masa y los parámetros orbitales de los planetas no en tránsito.
- Análisis de la variación del tiempo de tránsito para inferir interacciones gravitacionales.
Principales resultados:
- Confirmación de dos planetas, KOI-872b y KOI-872c, con períodos de 33,6 y 57,0 días, respectivamente.
- Detección de un tercer planeta candidato, una súper-Tierra con un período de 6,8 días.
- KOI-872c es un planeta sin tránsito con una masa de 0,37 masas de Júpiter, cerca de una resonancia de 5:3.
- El sistema exhibe órbitas casi coplanares y circulares.
Conclusiones:
- El sistema KOI-872 es un sistema multiplanetario con una configuración única.
- La disposición orbital detectada es una reminiscencia de la estructura ordenada del sistema solar.
- Se necesitan más observaciones para caracterizar completamente el planeta candidato.
Videos de Conceptos Relacionados
01:10Detection of Black Holes
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
01:10Kepler's First Law of Planetary Motion
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. He formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe.
Polish astronomer Nikolaus Copernicus put forth a theory that stated a heliocentric model for the solar system. According to this heliocentric theory, all the planets, including Earth, orbit the Sun in circular orbits.
On the other hand,...
Polish astronomer Nikolaus Copernicus put forth a theory that stated a heliocentric model for the solar system. According to this heliocentric theory, all the planets, including Earth, orbit the Sun in circular orbits.
On the other hand,...
01:29Kepler's Second Law of Planetary Motion
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. His first law states that all planets orbit the Sun in an elliptical orbit, with the Sun at one of the ellipse's foci. Therefore, the distance of a planet from the Sun varies throughout its revolution around the Sun.
While in an elliptical orbit, the total energy of the planet is conserved. Therefore, the planet slows down when it is at apogee and...
While in an elliptical orbit, the total energy of the planet is conserved. Therefore, the planet slows down when it is at apogee and...
01:18Kepler's Third Law of Planetary Motion
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. In 1909, he formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe. However, in 1918, he published his third law of planetary motion, which gives a precise mathematical relationship between a planet's average distance from the Sun and the amount of time it takes to revolve around the Sun. It...
01:24Acceleration due to Gravity on Other Planets
The gravitational acceleration of an object near the Earth's surface is called the acceleration due to gravity. It can be measured by conducting simple experiments on Earth. However, such an experiment is impossible to conduct on the surface of other planets.
Astronomical observations are thus used to measure the acceleration due to gravity on other planets. This can be determined by observing the effect of a planet's gravity on objects close to it. The crucial factor that helps in this...
Astronomical observations are thus used to measure the acceleration due to gravity on other planets. This can be determined by observing the effect of a planet's gravity on objects close to it. The crucial factor that helps in this...
01:05Doppler Effect - II
The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...