A significant discovery in the field of exoplanet research was made by a team of scientists led by astronomer Ján Šubjak from the Stellar Department of the Astronomical Institute of the Academy of Sciences of the Czech Republic and the Center for Astrophysics of Harvard University and the Smithsonian Institution in the USA. She recently also published about it professional study.
The body TOI-2458 b could now, thanks to the research of experts, be officially identified for the first time as the so-called a transiting planet – when it moves in front of its parent star, it causes a regular decrease in its brightness. Changes in the star’s brightness directed scientists to further, more detailed observations. The combination of data from the TESS satellite and spectroscopic measurements made it possible to determine the size, mass and other properties of the planet.
It orbits the star in less than four days
TOI-2458 b has a radius of about 2.8 times that of Earth and a mass of about 13.3 times that of our planet. It moves in a very close orbit, taking only 3.74 days to orbit its host star. This world is thus found in a very hot environment, where the conditions are not favorable for the existence of life.
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The star around which the mentioned planet orbits has a slightly higher mass than our Sun and a surface temperature of around 6000 Kelvin.
- Kelvin (K) is a unit of thermodynamic temperature and also a convenient unit of temperature difference, as large as the degree Celsius. Kelvin is one of the seven base units of the SI system. Although the temperature difference measured in degrees Celsius and in Kelvin is the same, the Celsius scale has a different origin: 0 °C corresponds to 273.15 K, while 0 K is absolute zero.
Analyzes show that the star is in an advanced stage of its evolution and may be around 5.7 billion years old. Researchers were also interested in the star’s rapid rotation, which lasts only nine days, together with a very short cycle of magnetic activity of 54 days.
“Our observations suggest that this system is dynamically very interesting,” noted Šubjak. “The rapid rotation and magnetic activity of the star may be the result of interactions with planetary objects in the past.”
Was there a hot jupiter?
The core part of the new study is the hypothesis that the TOI-2458 planetary system may have included the so-called hot jupiter. In contrast to the hypotheses predicting the migration of planets of this type from the outer parts of the protoplanetary disk, this hot Jupiter could have formed directly in place at a very close distance from the star.
A protoplanetary disk is a flattened cloud of dust and gas in space that rotates around a nascent or newly formed star. In the course of millions of years, small particles gradually start to clump together and collide with each other, which leads to the formation of larger bodies acting on each other with increasingly strong gravity, the so-called planetesimal. From these, mutual collisions form protoplanets, later planets themselves.
Gradually, however, the corresponding hot giant planet was absorbed by the star due to tidal interactions. This process could explain why the star TOI-2458 now exhibits an unusually rapid rotation.
“The absorption of a massive planet could have imparted a significant amount of spin to the star,” Šubjak mentioned.
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If this hypothesis of a lost hot Jupiter is true, its presence in the past would have greatly affected the dynamics of the orbits of the remaining planets. Astronomers believe that gravitational interactions may have led to the unusual inclination of the orbit of the mini-Neptune TOI-2458 b, which now orbits the poles of its star.
Finding another planet in the system
Additionally, upon further investigation of the TOI-2458 planetary system, scientists identified the presence of a second existing planet. It orbits at a greater distance from that star than TOI-2458 b.
The planet in question has an orbital period of about 16.5 days. Its mass is estimated to be between 10 and 25 times that of Earth, but further observations will be needed to determine more precisely.
Follow-up research could thus bring (and confirm) a new view of how star systems interact with the planets that orbit near them. According to Šubjak, the universe is still full of surprises.
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Breaking News from the *Czech*-tacular Exoplanet Research!
Let’s kick this off with some cosmic comedy! A team of astronomers led by Ján Šubjak from the Astronomical Institute of the Academy of Sciences in the Czech Republic and their chums at Harvard have made a stunning discovery—TOI-2458 b! It’s not just a cool name—it could be the poster child for exoplanets, as this tiny tyrant orbits its star in a blindingly fast 3.74 days. That’s quicker than my mate Dave getting on the karaoke machine after a few pints!
The “Hot” in Hot Jupiter
So, what makes TOI-2458 b “hot”, you ask? Well, let’s just say it’s not because it moonlights as a model. The planet’s got the kind of scorching vibes that would make even your summer BBQ look like a winter wonderland. With a radius of about 2.8 times that of Earth and massing in at around 13.3 times the weight of our blue marble, this is not a planet you’d want to take home to meet the parents!
Brightness on a Cosmic Scale
Our stellar buddy TOI-2458 b has some party tricks too! As it whizzes around its parent star, it casts a shadow, causing regular outages in the stellar light—a cosmic case of flickering bulbs! Imagine the electricity bill—this star must be sweating! Scientists detected this dip in brightness and decided to investigate further. Cue the TESS satellite and spectroscopic measurements! Get ready for the ultimate interstellar detective work.
Caution: Hot Zone Ahead!
Now, if you thought you could hike up TOI-2458 b for a picnic, you might want to reconsider. This planet resides in a blistering region of space where conditions for life are about as likely as finding a grammatically correct tweet from a celebrity—almost impossible! With its crumbly orbit around a star hotter than your average Kardashian, we could say it’s the hottest place in the universe—minus a few vacation spots in Mexico, of course.
What’s the Star Up To?
The star isn’t just a pretty face! It’s about 5.7 billion years old, with a rotation speed that would put F1 cars to shame—this baby spins in just nine days! And it gets better! There’s a magnetic activity cycle clocking in at just 54 days. “Our observations suggest this system is dynamically very interesting,” said Šubjak, likely suppressing an interstellar giggle.
Where’s the Hot Jupiter Gone?
Here comes the plot twist! Research suggests there might have once been a “hot Jupiter” in the TOI-2458 system, but it went and got absorbed by the star. Talk about making a bad decision! This lovable ‘hot Jupiter’ could explain the star’s rapid spin. If my last partner had absorbed my Netflix account like that, I’d be spinning too!
New Discoveries on the Horizon
Not to leave us in suspense, the scientists discovered a second planet in the same backyard, with an orbital period of about 16.5 days, and let’s just say it’s still in the mystery box when it comes to its mass. Between 10 and 25 times that of Earth, it sounds like a prequel to yet another cosmic sitcom!
Czech science truly knows how to party! If that hypothesis about the hot Jupiter is true, it could be a cosmic game-changer, explaining a lot about how these star systems rearrange themselves. Who knew that the universe was like a messy teenager’s room—constantly changing and lookin’ for love in all the wrong places?
Final Thoughts
So, as we raise our glasses to Ján Šubjak and the astrological team for their jaw-dropping discovery, let’s remember: the universe is full of surprises, kind of like a blind date where the person actually shows up. Keep your telescopes aimed up, folks, because if the findings from TOI-2458 are anything to go by, the universe has a few more stunners lined up just for us!
A groundbreaking advancement in exoplanet research has been achieved by a team of scientists headed by astronomer Ján Šubjak from the Stellar Department of the Astronomical Institute of the Academy of Sciences of the Czech Republic in collaboration with the Center for Astrophysics at Harvard University and the Smithsonian Institution in the United States. This significant work was encapsulated in her recently published professional study, shedding light on new findings in the field.
The celestial body TOI-2458 b has now, through extensive expert research, been formally identified as a transiting planet. This classification means that when it crosses in front of its parent star, it leads to a periodic dimming of the star’s light, prompting scientists to pursue more comprehensive observations. By combining data from the TESS satellite with spectroscopic measurements, researchers were able to ascertain critical details such as the size, mass, and other crucial characteristics of the planet.
It orbits the star in less than four days
TOI-2458 b boasts a radius roughly 2.8 times larger than that of Earth and has approximately 13.3 times the mass of our planet. With an astonishingly close orbit, it completes a revolution around its host star in just 3.74 days, placing it within an extremely hot environment where conditions are likely inhospitable to life.
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Science and schools
The star that serves as TOI-2458 b’s anchor point possesses a slightly greater mass than our Sun, with a surface temperature nearing 6000 Kelvin. This intense heat signifies a dynamic stellar environment that is ongoing.
Recent analyses indicate that this star is nearing an advanced phase of its life cycle, estimated to be around 5.7 billion years old. Researchers noted the star’s rapid rotation—taking just nine days to complete a rotation—coupled with a rapid magnetic activity cycle of only 54 days.
“Our observations suggest that this system is dynamically very interesting,” noted Šubjak. “The rapid rotation and magnetic activity of the star may be the result of interactions with planetary objects in the past.”
Was there a hot Jupiter?
Central to this new study is the intriguing hypothesis that the planetary system of TOI-2458 may have once harbored a hot Jupiter. Distinct from previous theories that suggested such planets migrated from the outskirts of the protoplanetary disk, the new hypothesis posits that this hot Jupiter could have formed in situ, in very close proximity to its star.
Such a protoplanetary disk features a flattened cloud of gas and dust revolving around a newly formed star. Over millions of years, tiny particles coalesce, resulting in larger bodies that exert increasingly powerful gravitational forces, ultimately leading to the formation of planetesimals. From these, through mutual collisions, protoplanets evolve into full-fledged planets.
Eventually, this hypothetical hot Jupiter may have been engulfed by the star due to tidal interactions, a possibility that could clarify the star’s unusually rapid rotation.
“The absorption of a massive planet could have imparted a significant amount of spin to the star,” Šubjak elaborated.
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If validated, this theory regarding a former hot Jupiter would have significantly influenced the orbital dynamics of the remaining planets in the system. Astronomers surmise that gravitational interactions could explain the unusual orbital inclination of mini-Neptune TOI-2458 b, which now orbits along the poles of its star.
Finding another planet in the system
Further examination of the TOI-2458 planetary system has unveiled the existence of a second planet orbiting at a greater distance from its host star than TOI-2458 b. This newly identified planet has an orbital period estimated at about 16.5 days, and its mass is believed to range between 10 and 25 times that of Earth, though additional observations are required for a more precise measurement.
Future research may yield fresh insights into the interactions between stars and the planets that orbit around them. As Šubjak aptly noted, “the universe is still full of surprises.”
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Researchers, led by Ján Šubjak, suggest that the system once contained a “hot Jupiter” that may have formed close to the star, challenging previous theories of planetary migration. This hypothesis is supported by observations of the star’s rapid rotation and magnetic activity, indicating dynamic interactions within the system.
Breaking News from the *Czech*-tacular Exoplanet Research!
Let’s kick this off with some cosmic comedy! A team of astronomers led by Ján Šubjak from the Astronomical Institute of the Academy of Sciences in the Czech Republic and their chums at Harvard have made a stunning discovery—TOI-2458 b! It’s not just a cool name—it could be the poster child for exoplanets, as this tiny tyrant orbits its star in a blindingly fast 3.74 days. That’s quicker than my mate Dave getting on the karaoke machine after a few pints!
The “Hot” in Hot Jupiter
So, what makes TOI-2458 b “hot”, you ask? Well, let’s just say it’s not because it moonlights as a model. The planet’s got the kind of scorching vibes that would make even your summer BBQ look like a winter wonderland. With a radius of about 2.8 times that of Earth and massing in at around 13.3 times the weight of our blue marble, this is not a planet you’d want to take home to meet the parents!
Brightness on a Cosmic Scale
Our stellar buddy TOI-2458 b has some party tricks too! As it whizzes around its parent star, it casts a shadow, causing regular outages in the stellar light—a cosmic case of flickering bulbs! Imagine the electricity bill—this star must be sweating! Scientists detected this dip in brightness and decided to investigate further. Cue the TESS satellite and spectroscopic measurements! Get ready for the ultimate interstellar detective work.
Caution: Hot Zone Ahead!
Now, if you thought you could hike up TOI-2458 b for a picnic, you might want to reconsider. This planet resides in a blistering region of space where conditions for life are about as likely as finding a grammatically correct tweet from a celebrity—almost impossible! With its crumbly orbit around a star hotter than your average Kardashian, we could say it’s the hottest place in the universe—minus a few vacation spots in Mexico, of course.
What’s the Star Up To?
The star isn’t just a pretty face! It’s about 5.7 billion years old, with a rotation speed that would put F1 cars to shame—this baby spins in just nine days! And it gets better! There’s a magnetic activity cycle clocking in at just 54 days. “Our observations suggest this system is dynamically very interesting,” said Šubjak, likely suppressing an interstellar giggle.
Where’s the Hot Jupiter Gone?
Here comes the plot twist! Research suggests there might have once been a “hot Jupiter” in the TOI-2458 system, but it went and got absorbed by the star. Talk about making a bad decision! This lovable ‘hot Jupiter’ could explain the star’s rapid spin. If my last partner had absorbed my Netflix account like that, I’d be spinning too!
New Discoveries on the Horizon
Not to leave us in suspense, the scientists discovered a second planet in the same backyard, with an orbital period of about 16.5 days, and let’s just say it’s still in the mystery box when it comes to its mass. Between 10 and 25 times that of Earth, it sounds like a prequel to yet another cosmic sitcom!
Czech science truly knows how to party! If that hypothesis about the hot Jupiter is true, it could be a cosmic game-changer, explaining a lot about how these star systems rearrange themselves. Who knew that the universe was like a messy teenager’s room—constantly changing and lookin’ for love in all the wrong places?
Final Thoughts
So, as we raise our glasses to Ján Šubjak and the astrological team for their jaw-dropping discovery, let’s remember: the universe is full of surprises, kind of like a blind date where the person actually shows up. Keep your telescopes aimed up, folks, because if the findings from TOI-2458 are anything to go by, the universe has a few more stunners lined up just for us!
A groundbreaking advancement in exoplanet research has been achieved by a team of scientists headed by astronomer Ján Šubjak from the Stellar Department of the Astronomical Institute of the Academy of Sciences of the Czech Republic in collaboration with the Center for Astrophysics at Harvard University and the Smithsonian Institution in the United States. This significant work was encapsulated in her recently published professional study, shedding light on new findings in the field.
In discussing the types of exoplanets, the Institute for the Czech Language of the Academy of Sciences of the Czech Republic notes terms like “hot Jupiter” and “mini-Neptune” are essential for classification.
The celestial body TOI-2458 b has now, through extensive expert research, been formally identified as a transiting planet. This classification means that when it crosses in front of its parent star, it leads to a periodic dimming of the star’s light, prompting scientists to pursue more comprehensive observations. By combining data from the TESS satellite with spectroscopic measurements, researchers were able to ascertain critical details such as the size, mass, and other crucial characteristics of the planet.
It orbits the star in less than four days
TOI-2458 b boasts a radius roughly 2.8 times larger than that of Earth and has approximately 13.3 times the mass of our planet. With an astonishingly close orbit, it completes a revolution around its host star in just 3.74 days, placing it within an extremely hot environment where conditions are likely inhospitable to life.
The Hera mission to protect the Earth from asteroids has started, Czechs are also participating
The star that serves as TOI-2458 b’s anchor point possesses a slightly greater mass than our Sun, with a surface temperature nearing 6000 Kelvin. This intense heat signifies a dynamic stellar environment that is ongoing.
Recent analyses indicate that this star is nearing an advanced phase of its life cycle, estimated to be around 5.7 billion years old. Researchers noted the star’s rapid rotation—taking just nine days to complete a rotation—coupled with a rapid magnetic activity cycle of only 54 days.
“Our observations suggest that this system is dynamically very interesting,” noted Šubjak. “The rapid rotation and magnetic activity of the star may be the result of interactions with planetary objects in the past.”
Was there a hot Jupiter?
Central to this new study is the intriguing hypothesis that the planetary system of TOI-2458 may have once harbored a hot Jupiter. Distinct from previous theories that suggested such planets migrated from the outskirts of the protoplanetary disk, the new hypothesis posits that this hot Jupiter could have formed in situ, in very close proximity to its star.
Such a protoplanetary disk features a flattened cloud of gas and dust revolving around a newly formed star. Over millions of years, tiny particles coalesce, resulting in larger bodies that exert increasingly powerful gravitational forces, ultimately leading to the formation of planetesimals. From these, through mutual collisions, protoplanets evolve into full-fledged planets.
