YAN Dongdong, GUO Jianheng and Xing Lei from Yunnan Observatories of the Chinese Academy of Sciences, collaborating with Huang Chenliang from University of Arizona, deduced that there is an expanding and escaping thermal neutral hydrogen atmosphere around hot Jupiter WASP-121b by simulating the optical transmission spectrum (Hα) of this exoplanet. The study was published in The Astrophysical Journal Letters. Source: https://phys.org/news/2021-02-optical-band-probe-atmosphere-hot.html…
Tag: hot jupiters
NASA’s Roman mission will probe galaxy’s core for hot Jupiters, brown dwarfs
When it launches in the mid-2020s, NASA’s Nancy Grace Roman Space Telescope will explore an expansive range of infrared astrophysics topics. One eagerly anticipated survey will use a gravitational effect called microlensing to reveal thousands of worlds that are similar to the planets in our solar system. Now, a new study shows that the same survey will also unveil more extreme…
Exoplanets that orbit close to their star may have been pushed there
Strange exoplanets called hot Jupiters may be thrown into extremely short 10-day-long orbits because they are born surrounded by stars that can disturb their trajectory Source: https://www.newscientist.com/article/2258843-exoplanets-that-orbit-close-to-their-star-may-have-been-pushed-there/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home…
NASA’s Planet Patrol wants you to join the search for exoplanets
Do you want to be a planet-hunter? NASA has launched a new citizen science website called Planet Patrol where volunteers can help search for exoplanets in data from the TESS space telescope. Source: https://earthsky.org/space/exoplanets-nasas-planet-patrol-citizen-science…
Statistical evidence for temperature inversions in ultra-hot Jupiters
The thermal structure of hot gas giant exoplanet atmospheres is likely to be inverted for the hottest planets, a class of planets known as ultra-hot Jupiters. This is the conclusion from astrophysicists based at the University of Amsterdam (UvA) in collaboration with an international team from the United States and the United Kingdom. Source: https://phys.org/news/2020-08-statistical-evidence-temperature-inversions-ultra-hot.html…
How astronomers rediscovered a ‘lost world’
And why this rediscovery of a lost world – called NGTS-11b – bodes well for finding habitable exoplanets. Source: https://earthsky.org/space/lost-world-ngts-11b-exoplanet-habitable-zone…
Some hot giant planets get larger as they are heated by their stars
Hot Jupiters, a class of large gas giant exoplanets, appear to get bigger as they are heated over billions of years by their stars Source: https://www.newscientist.com/article/2246375-some-hot-giant-planets-get-larger-as-they-are-heated-by-their-stars/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home…
Astronomers create cloud atlas for hot, Jupiter-like exoplanets
Giant planets in our solar system and circling other stars have exotic clouds unlike anything on Earth, and the gas giants orbiting close to their stars—so-called hot Jupiters—boast the most extreme. Source: https://phys.org/news/2020-05-astronomers-cloud-atlas-hot-jupiter-like.html…
K2-25: An eccentric hot Neptune with the mass of seven Earths
Of the roughly 4,300 exoplanets confirmed to date, about ten percent of them are classified as “hot Jupiters.” These are planets with masses between about 0.4 and 12 Jupiter-masses and orbital periods less than about 110 days (implying that they orbit close to their star—usually much closer than Mercury is to the Sun—and have hot surface temperatures). A “hot Neptune” has…
This brown dwarf might look a lot like Jupiter
The cloud bands on brown dwarf Luhman 16A were found via instruments known as polarimeters. An astronomer said they’re like “… an astronomer’s polarized sunglasses. But instead of trying to block out that glare, we’re trying to measure it.” Source: https://earthsky.org/space/brown-dwarfs-banded-clouds-luhman-16a-vlt…