Astronomers find two large-scale exoplanets in adjacent binary systems. Astronomers have discovered two planets orbiting a bright dwarf star in the binary star system Gliese 414. An artist’s impression of the Gliese 414 system.
Gliese 414 is approximately 39 light years distant in the constellation Ursa Major. Also known as GJ 414, HD 97101, or HIP 54646, the system is 12.4 billion years old. This includes the relatively active K7V-type dwarf star Gliese 414A and its smaller M2V-type dwarf companion, Gliese 414B.
The physical separation between the two cables is approximately 408 AU (astronomical unit). Two newly discovered exoplanets, called glycea 414Ab and c, orbit the large stars in the system.
The inner planet is a subneptune in an eccentric orbit of 50.8 days. It is 2.95 times the size of Earth, 8.8 times the mass, and a temperature of about 31 degrees Celsius (88 degrees Fahrenheit).
The outer planet is sub-Saturn in a nearly circular orbit with an orbit of about 748.3 days. It is 8.8 times the size of Earth, 56.3 times the mass, and has a temperature of minus 150 degrees Celsius (minus 238 degrees Fahrenheit).
The planets were detected at the Keck I telescope at W.M using radio speed data from the H.MES instrument. KK Observatory and automated planet finder at the Leake Observatory, as well as photometric data from the KLT-North Telescope at the Winner Observatory.
The Pennsylvania State University astronomer Kela Dedrick and colleagues wrote in their paper: “Gliese 414Ac lives near the inner edge of the star’s habitable zone, but its minimum mass is large enough, probably to have a rich enough envelope. in volatile “.
“This planet is a potential candidate for future direct imaging missions.” Image courtesy: netbij.com – The team’s article will appear in the Astronomical Journal.
Astronomers discovered three giant exoplanets in the ‘twin’ binary system. An international team of astronomers from the United States and Chile has detected three massive planets in the HD133131 system, a pair of stellar ‘twins’ that eclipse each other every 4,240 years.
Artist’s concept of giant planets orbiting in a double star system. HD 133131, also known as HIP 73674, is approximately 163 light years from Earth. This binary system was discovered in 1972 by astronomers Jurgen Stock and Herbert Wroblowski from the University of Chile.
Scientists have described its age as 9.5 billion years compared to our Sun’s 4.6 billion years. The two components of this binary, HD 133131A and HD 133131B, are “twins” of the same spectral type, G2V, which is similar to the Sun.
The stars are only 360 AUs (astronomical units) apart, making them the most closely spaced ‘twins’ with the detected planets. The next closest binary system to host the planets consists of two stars spaced about 1,000 AU apart.
This system is even rarer because it has twin host planets. HD 133131A houses two medium eccentric planets, labeled b and c. The planets are about 1.4 and 0.6 times the mass of Jupiter, respectively, and orbit their original stars at 1.44 and 4.79 AU.
HD 133131B houses a labeled eccentric light planet. The planet is 2.5 times the mass of Jupiter and orbits its star at a distance of 6.4 AU.
The HD133131 system is also unusual in that both components are metallic decay, which means that most of their mass is hydrogen and helium, as opposed to other elements like iron or oxygen.
Most of the stars that host giant planets are rich in metals. Only six other metal-poor binary systems with exoplanets have been found, making this discovery particularly intriguing.
In addition to the intrigue, the authors used very precise analysis to explain that the stars are not actually identical intrigued twins, as previously thought, but their chemical structures are slightly different, making them stellar equivalent to sinister twins. Cooks like
This may indicate that a star quickly swallowed up some baby planets in its lifetime, slightly altering their structure. Image courtesy: netbij.com
Alternatively, the gravitational forces of known giant planets that can have a strong impact on smaller fully formed planets flow towards the star or into space.
Lead authors from the Carnegie Institution for Science, Drs. Johanna Teske said: “There was little chance of finding a system with all these components, so these results would serve as an important benchmark for understanding planet formation.” Washington
The discovery is made to locate the first exoplanet, based on data obtained from the planet finder spectrograph, a high-precision optical spectrograph powered by a 6.5-meter Magellan II telescope at the Las Campesana Observatory in Chile. .
“We are trying to find out if giant planets like Jupiter are often in long or eccentric orbits,” Dr. Tessan explained. “If this is the case, then this process would be an important clue by which our solar system is formed, and can help us understand where the habitable planets are located.”
The team’s findings have been accepted for publication in the Astronomical Journal.