Melts metal in space
Magnetic induction melts planets
Supposedly Earth-like planets around dwarf stars like TRAPPIST-1 may be affected by extreme volcanism and form magma oceans on the surface. This is indicated by the analysis of a research team from Austria, Germany and Russia. According to this, the magnetic field of the central star could heat the planet by induction so that its mantle melts. Thus, despite its location in the star's friendly zone, such a planet would probably not be suitable for the creation of life, according to the scientists in the journal "Nature".
Rock planets of dwarf stars are particularly in the sights of astronomers in their search for life outside of our solar system. "Dwarf stars with small mass are particularly common in the cosmos and are often orbited by easily identifiable rock planets," write Kristina Kislyakova from the University of Vienna and her colleagues. Many of these rocky planets orbit within the life-friendly zone - defined as the area in which liquid water is possible on the surface. In addition, due to the low mass of the dwarf stars, the life-friendly zone is much closer to the star than to our sun, for example. However, dwarf stars often have strong magnetic fields that lead to violent bursts of radiation and thus affect the conditions for the creation of life on such planets as well as the bound rotation due to the narrow orbits. Because the planets often always assign the same side to their star, which would lead to extreme conditions in a possible atmosphere.
Kislyakova and her colleagues are now showing another effect that could affect the creation of life on such planets: magnetic induction. As an example, the researchers choose the planetary system around TRAPPIST-1. The central star, about forty light-years away, is orbited by at least seven planets, three of which may be in the livable zone. Analysis by Kislyakova and her team shows that magnetic induction could heat these planets to the point where their mantle melts. Extreme volcanism and the formation of magma oceans on the surface would be the result.
However, the prerequisite for this scenario is that the magnetic axis of the star is inclined to its axis of rotation. Only then does the magnetic field fluctuate in the area of the planets, which induces heating currents. "There are a number of observations that indicate such a tilt of the magnetic field in dwarf stars," explains Kislyakova. However, so far these have only been measurements on a few objects. Even with TRAPPIST-1, the exact position of the magnetic field is not yet known. Only systematic studies of the magnetic fields of dwarf stars can show whether magnetic induction plays an important role for their planets.
- How are domain names shut down
- What's your first guitar
- How do I physically restart the Cisco switch
- How should sanded wood look like
- How is congenital adrenal hyperplasia diagnosed
- What are the trends in automation
- How did the Cold War affect Asia?
- What is country bacon
- How do Clover and Venmo compare
- What exactly are CFA FRM and actuaries
- As a system administrator, programming is really important
- Why do people think Glasgow is violent
- My life sucks. Should I start smoking
- What's wrong with gas prices
- What is CP coin
- Who wrote the song Its Raining Men
- What's the song of Frosted Flakes
- What scotch is smoky without tasting medicinal
- Where can I find a smart girl
- Why is open NAT superior to moderate
- What is an alternative to Airtable
- Why was Steven Crowder demonized by YouTube
- Facts can be hateful
- What are the admission criteria for ONGC