Hot gas giant circles young active star TOI-201. Using data from NASA’s Transiting Exoplanet Study Satellite (TESS) and various ground-based telescopes.
An artist’s impression of the giant exoplanet TOI-201b and its original star. An artist’s impression of the giant exoplanet TOI-201b and its original star.
Astronomers have discovered and confirmed a giant exoplanet carrying the young F-type star TOI-201.
Astronomer of the Millennium Institution and Ponticalia Universidia Catolica de Chile for the Millennium Institute of Astrophysics, Dr. Melissa Hobson and Drs. Melissa Hobson said:
The transmitting giants are Jupiter with planets more than 0.8 times and between 10 and 100 days of orbital period.
They are particularly important for understanding the formation and evolution of giant planets. Unlike hot Jupiters, that is, planets with a radius 0.8 times larger than Jupiter that have Jupiter and orbital periods of less than 10 days.
Which are inflated by mechanisms that are still hidden, but associated with radiation. These more distant planets are probably less strongly irradiated by their host star.
Which means that their size and mass can be effectively characterized by their metallicity. Both hot and hot Jupiters are unlikely to form in situation.
But are expected to form in the outer regions of the disk and migrate to their current locations; The main proposed mechanisms are gas disk migration and high eccentric migration, she wrote.
However, the orbital currents of hot Jupiter are influenced by the evolution of the tides, which can erase traces of previous interactions with planets; this is not the case of hot Jupiter.
Therefore, this population of planets is a giant planet in its physical and orbital aspect. Parameters. It preserves valuable information for the study of construction.
The newly discovered hot giant is 0.42 times the mass of Jupiter and has the same radius as Jupiter. Named TOI-201B, the planet revolves around the bright F-type star TOI-201 once every 53 days.
TOI-201b is still cooling quite rapidly, as expected from the youth of the host star, the astronomers wrote. TOI-201 is approximately 372 light years distant in the constellation of the painter.
Also known as HD 39474 and TIC 350618622, this star is 32% larger and more massive than the Sun and is about 870 million years old.
TOI-201b was first identified as a candidate in the TESS data and later confirmed to use ground data from the Next Generation Traffic Survey (NGTS).
The researchers used radial velocity data from three spectrographs (FEROS, HARPS, CORALIE) at the La Silla Observatory and a series of four telescopes called Minerva-Australasia.
TOI-201b is within the measured age with the youngest 5% of exoplanet host stars, making this system a valuable addition to known planets around young stars, the principles of planet formation and evolution they are important to test and compel
It also joins the small but growing population of giant planets in the long term, helping to populate a relatively sparse area of the radio period diagram. The team’s article will be published in the Astronomical Journal.
TESS denotes the hot new Jupiter, an international team of astronomers discovered a hot giant exoplanet that orbits the bright star TOI-677. A print of the hot Jupiter TOI-677b cast and its host star.
Warm giants, defined as systems with periods longer than 10 days, are close enough to the star to experience significant migration.
But not so close that the effects of the tides can erase the possible traces of this migration, said Dr. Andrés Jordan said that for the Universidadolf Ibáñez and the Millennium Institute of Astrophysics and his colleagues.
In the same sense, they are far enough away from their original star that their ingenuity has not been inflated by the mechanism used to feed the reds of the hottest giants.
But while it is clear that these systems are very interesting, the population of known hot giants around nearby stars. Which allows for more detailed characterization remains very small.
Called TOI-677b, the new hot giant was detected by NASA’s Exoplanet Inspection Satellite (TESS).
We follow the host star, TOI-677, which includes several spectrographs to confirm the candidate of the TESS transit planet and measure its mass, the astronomers explained.
They discovered that the TOI-677b is approximately 1.2 times larger and more massive than Jupiter.
Its radius corresponds to what is expected of a gas giant with a core of 10 Earth masses according to the standard model, he said. The TOI-677 is an F-type star about 464 light years away from Earth.
Also known as HD 297549 and 2MASS J09362869-5027478, this star is slightly larger and more massive than the Sun and is approximately 2.92 billion years old.
The TOI-677b orbits the star in an eccentric orbit with an orbital period of 11.24 days.
Dr. Jordan and his co-authors stated: With a singularity of 0.435, it is in the upper range of eccentricity values for planets with similar periods in the currently known sample.
An article detailing the discovery will be published in a magazine of the American Astronomical Society.
Scientists find iron 'ice' in the Earth's core:
According to new research, the Earth’s inner core is hot, under extreme pressure and ‘snow cover’, which can help scientists better understand the forces that affect the entire planet.
The ice is formed by small particles of iron that fall from the molten outer core and accumulate in the inner core.
The inner core of the Earth is warmer, according to new research, which can help scientists better understand the forces that affect the entire planet.
The ice is made up of small iron particles, much heavier than any snowflake on the Earth’s surface, which fall from the molten outer core and accumulate in the inner core, accumulating up to 200 miles thick.
They are formed that cover the inner core.
The image may seem like an exotic winter paradise. But the scientists who led the investigation said that this is how the rocks are inside the volcano. The Earth’s metal core acts as the magma chamber that we know best in the cortex, said Jung-Fu Lin.
A professor and co-author of the study at the Jackson School of Geosciences at the University of Texas at Austin. The study is available online and will be published on December 23 in the print edition of JGR Solid Earth.
Eugen Zhang, associate professor at Sichuan University in China, led the study.
Other co-authors include Jackson School graduate student Peter Nelson; And Nick Diegert, an assistant professor at the University of Tennessee who researched during a postdoctoral fellowship at Jackson School.
The Earth’s core cannot be sampled, so scientists study it by recording and analyzing seismic wave signals (a type of energy wave) as they pass through the Earth.
However, the expiration between recent seismic wave data and expected values based on current models of the Earth’s core has raised doubts.
Waves move more slowly than expected when they pass through the base of the outer core, and move faster than expected when the upper inner core passes through the eastern hemisphere. The study proposes iron ice-covered cores as an explanation of these aberrations.
Braginsky proposed in the early 1960s that there was a dirty layer between the inner and outer nuclei, but the prevailing knowledge about the conditions of heat and pressure in the central environment abolished that theory.
However, the new data extracted from the experiments and the new scientific literature made by Zhang on core-like materials found that crystallization was possible and that approximately 15% of the lower outer core may be composed of iron-based crystals that they finally dilute.
He might fall down. Nestled on the outer core and solid inner core. It’s a strange thing to think about that, said Diegert. You have crystals inside the outer ice core in the inner core several hundred kilometers away.
The researchers point out that accumulated snow accumulations are the cause of seismic disasters. Dirty structures slow down seismic waves.
The variation in the size of the ice pile, thin in the eastern hemisphere and thick in the west, explains the change in speed.
The inner core boundary is not a simple and smooth surface, which can affect thermal conduction and core convection, said Zhang.
The paper compares the iceberg of iron particles with a process that occurs near the surface of the Earth inside the magma chambers, which involves the melting and polishing of minerals.
In magma chambers, a collection of minerals is known as “accumulated rock.”
In the Earth’s core, iron condensation contributes to the growth of the inner core and the reduction of the outer core.
A greater understanding of its structure and behavior can help you understand how these great processes work. Bruce Buffay, a professor of geological sciences at the University of California, Berkeley.
Who studies the interiors of the planet and did not participate in the study, said the research addressed long-standing questions about the interior of Earth. It can help you learn even more about how the core came about.
Relating the predictions of the model with the anomalous observations helps us to speculate on the possible compositions of the liquid nucleus and perhaps this information is connected with the position that formed when the planet formed.
The initial position of the Earth is an important.