It is considered very hot Thursday – A place where iron evaporates and condenses at night and falls from the sky like rain – WASP-76b like fire and hell Outside the solar planet This may be more exciting than scientists have identified.
An international team led by scientists from Cornell University, University of Toronto and Belfast Queen’s University has reported the discovery of ionized calcium on the planet, indicating higher atmospheric temperatures or stronger winds than previously thought.
The discovery was made in the high-resolution spectrum obtained using Gemini North near the Mauna Kea peak in Hawaii.
Hot Jupiters are named for their high temperatures due to the proximity of the stars. WASP-76b was discovered about 640 light-years from Earth in 2016, but is much closer to its Type F star, which is slightly hotter than the Sun, and a giant planet orbits Earth every 1.8 days.
Exoplanets using the Gemini Spectroscopic Survey or Exogens, which studies the diversity of the planet’s atmosphere, is the first in a multi-year project led by Cornell.
“Because of the far-sightedness of dozens of exoplanets that extend across different masses and temperatures, we can get a more complete picture of the real diversity of space worlds – from the heat required for iron rain to others in temperate climates,” said Ray Jayawardena and Harold Tanner. Dean and Professor of Astronomy at Cornell University College of Arts and Sciences:
“Significantly, with modern telescopes and instruments, we can already learn a lot about the atmosphere – its elements, physical properties, the presence of clouds, and even large wind patterns – about planets orbiting stars hundreds of light-years away,” Jayawardena said.
Exoplaner WASP-76b publishes rare three-dimensional spectral documents found in highly sensitive observations of the atmosphere Letters from astronomical journals Presented at the Annual Meeting of the Planetary Sciences Division of the American Astronomical Society on September 28 and October 5.
“We see a lot of calcium; This is a real achievement, “said Emily Debert, a doctoral student at the University of Toronto, and her mentor, Jayawardene.
“This spectroscopic signature of ionized calcium may indicate that there is a very strong wind in the atmosphere above the exoplanet,” Debert said. “Or the air temperature on the exoplanet is much higher than we thought.”
Since WASP-76b is closed during Word – this aspect always faces the star – it has a perpetual nighttime temperature of 2400 degrees. F Average temperature. On the day side, facing the star, the average temperature is 4400 degrees Fahrenheit.
Debert and his colleagues explored the temperate zone on the edge of the planet day and night. “The exoplanet is moving so fast in its orbit that this way we can distinguish its signals from the starlight,” she said. “You can see that the calcium particles in the spectra are moving rapidly with the planet.”
Carl Sagan’s colleague Jake Turner led the ExoGemS survey, which aims to explore 30 or more planets. NASAJayawardene also recommends the Hubble Scholarship Program, located in the Department of Astronomy at Cornell University (A&S).
Astronomers continue to study exoplanets more deeply – two decades ago it was a dream come true. “The work of us and other researchers is paving the way for the study of the atmospheres of the Earth’s worlds outside our solar system,” Turner said.
Reference: “Determination of ionized calcium in the atmosphere of superheated Jupiter WASP-76b”, Emily K. Debert, Ernest GWD Moy, Ray Jaywarden, Jake D. Turner, Andrew Rayden Harper, Luke Fosatti, Cali E.. Hud, Jonathan J .; . Fortney, Laura Flaga, Ryan McDonald, Roman Alert, David K. Singh, September 28, 2021 Available here. Letters from astronomical journals.
DOI: 10.3847 / 2041-8213 / ac2513
Other authors are Ernest JWD Moog of Queen’s University Belfast. Luka Fossatti from the Austrian Academy of Sciences; Kali E. Hood, Jonathan J. Fortney from the University of California, Santa Cruz; University of Montreal Romain Alert; David K. of Johns Hopkins University. Cornell researchers include Andrew Reden-Harper, Laura Flag, Jayawardene Group and Ryan McDonald. Part of this study was funded by NASA.
Gemini North is part of the International Twin Observatory, a program of the National Science Foundation’s NOIRLab.
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