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gj 1214b temperature

ExoClimes - Exeter - September 9, 2010 Eliza Kempton. The Astrophysical Journal, 716:1208–1216, 2010 June 20. GJ 1214b has now become the world's hot with temperatures around 200 C (392 F) 7. Recent surveys have revealed that planets intermediate in size between Earth and Neptune (“super-Earths”) are among the most common planets in the Galaxy[1, 2, 3]. In the end, the actual planet atmospheric composition depends on the interior composition of the planet, the mass and temperature of the planet, and the planet evolution. Du fait de sa proximité et de la petite taille de son étoile parent, GJ 1214b est en effet la super-Terre la plus facile à observer. The planet GJ 1214b, shown here in an artist’s conception with two hypothetical moons, orbits a “red dwarf” star 40 light-years from Earth. A structure of the low orbital exoplanet GJ 1214b is presumably interpreted as presence of a deep global ocean and H2-He atmosphere. Recent measurements have shown its near-infrared transmission spectrum to be flat, pointing to a high-altitude opacity source in the exoplanet 's atmosphere, either equilibrium condensate clouds or photochemical hazes. Although warm as an oven, it is still cooler than any other known transiting planet because it orbits a very dim star. Marley et al. Abstract. GJ 1214b Angela M. Zalucha (Massachusetts Institute of Technology, Southwest Research Institute) Nikku Madhusudhan (Yale) Tim Michaels (Southwest Research Institute) The super-Earth GJ 1214b gravitational acceleration: 8.93 m s–2 radius: 2.678 R e distance from star: 0.01432 AU stellar flux at planet: 21519 W m–2 rotation period: 1.5803925 Earth days (synchronous) (Charbonneau et al. GJ 1214b 3D GCM assuming a global mean surface pressure of 105 Pa and a surface albedo of 0.4. POST. A … “ The high temperatures and high pressures would form exotic materials like ‘hot ice’ or ‘superfluid water’, substances that are completely alien to our everyday experience, ” Berta said. Une perspective d'importance alors que ce type de planètes reste largement méconnu. Now GJ 1214b is in the news again, thanks to near-infrared spectra collected by the Hubble Space Telescope's Wide-Field Camera 3. But both temperature and pressure are high to the point that water could exist on this planet in the form of a superfluid and hot ice! The temperature of the stellar corona is estimated to be about 3.5 × 10 6 K. Planetary system. GJ 1214b only 42 light years away would be an ideal candidate for a classical exoplanet. L. A. Rogers and S. Seager. If it is a water world, it could possibly be thought of as a bigger and hotter version of Jupiter's Galilean moon Europa. It is much closer to its sun. GJ 1214b probably formed farther out from its star, where water ice was plentiful, and then migrated in to its current location long ago. GJ 1214b has no land, but only oceans that stretch all over the surface. case of exoplanet GJ 1214b, for which multiple ground-based and space-borne observations reveal a remarkably flat spectrum extending from visible to IR (see Angerhausen et al. GJ 1214b: an unusual waterworld; GJ 1214b: an unusual waterworld. (d) Time averaged temperature on GJ 1214b on the 680 Pa level (about 62 km altitude) as-suming a global mean surface pressure of 105 Pa and a surface albedo of 0.4. In 2010, CfA scientist Jacob Bean and colleagues reported that they had measured the atmosphere of GJ 1214b, finding it likely that it was composed mainly of water. As a result, the internal structure of GJ 1214b would be extraordinarily different from that of our world. GJ 1214b: The Waterworld. This suggests that GJ 1214b has much more water than Earth does, and much less rock. Using the Hubble Space Telescope, U.S. astronomers discovered the planet GJ 1214b is shrouded by clouds and its temperature is caused by its nearby parent star. Final score: 15 points. 2009) is the second known transiting super-Earth, and also the first such planet to likely posess significant gaseous envelope. Planet GJ 1214 GJ 1214b orbiting a five times smaller than the mass of the Sun and a brightness of 300 times fainter. According to study author Zachory Berta, then at the Harvard-Smithsonian Center for Astrophysics, in a press release, “GJ 1214b is like no planet we know of. Currently, water in GJ 1214b has a consistency that is very strange and will seem very familiar to us, as a result of high temperature and atmospheric pressure is great, the water will be more like hot ice thick or act more … GJ 1214b (Charbonneau et al. According to Harvard-Smithsonian Center for Astrophysics scientist and lead author Zachory Berta, "GJ1214b is like no planet we know of. lincholn6echo. This planet Astronomers estimate the planet¹s temperature to be about 400 degrees Fahrenheit. Discovered in 2009 , the planet is about 2.7 times Earth’s diameter and is almost 7 times as massive. GJ 1214b is located in the constellation Ophiuchus, some 40 light-years from us. Therefore, if GJ 1214b contains a significant amount of water, it is reasonable to think that the planet has experienced the orbital migration. For that reason, scientists have nicknamed the planet "the waterworld". According to a 2012 study based on observations by the Hubble Space Telescope, GJ 1214 b is actually a massive water world encapsulated by a dense and steamy atmosphere. Image credit: CfA/David Aguilar . The star is located at a distance of 40 light-years away in the Ophiuchus constellation. Published on 23 February 2012. • GJ 1214b is the first super-Earth to have a potentially observable atmosphere with current instrumentation • Transmission spectroscopy of the planet’s atmosphere can break the degeneracy between interior composition models • Clouds can add additional complexity to the interpretation of GJ 1214b’s spectral signature. Despite the heat, high atmospheric pressure will stop the oceans of boiling. The data seem to confirm that GJ 1214b has a very steamy atmosphere, thick with water vapor. GJ. (WFC3 isn't a spectrometer per se, but its infrared channel has 15 different filters spaced between 1.1 and 1.7 microns.) Atmospheric studies are the next step toward developing a comprehensive understanding of this new class of object[4, 5, 6]. Gj 1214 GJ 1214b would be extraordinarily different from that of our world super-Earth. Author Zachory Berta, `` GJ1214b is like no planet we know of, for an overview of transit! 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