Research shows that binary star systems contain a higher number of habitable exoplanets than previously thought

In a new study, astronomers from Yale University and the Massachusetts Institute of Technology examined the coupled distribution of spin and orbital orbits of exoplanets in binary and triple star systems.

An important subset of all known exoplanet systems include host stars with one or more bound stellar companions.

These multistar systems can span a vast range of relative configurations and provide rich insights into the processes by which stars and planets form.

“We showed for the first time that a system where everything is coordinated stacks up unexpectedly,” he said. Dr. Malena Ricean astronomer at Yale University.

“The planet orbits in exactly the same direction as the first star rotates, and the second star orbits its system in the same plane as the planet.”

Dr. Rice and his colleagues used a variety of sources, including the Gaia DR3 catalog of high-precision stellar astronomical measurements, the planetary system composite parameter table from the NASA Exoplanet Archive, and the TEPCat catalog of spin-orbit angle measurements of exoplanets. to create a 3D geometric shape. Number of planets in a binary star system.

Astronomers found that nine of the 40 star systems they studied were in “perfect” locations.

“This could indicate that planetary systems prefer to move toward ordered configurations,” Rice said.

“This is also good news for life forming in these systems.”

“A star's companion star with a different alignment can wreak havoc on a planetary system, overturning the planet or flash-heating the planet over time.”

“And what would the world look like on a warmer Tatooine?”

“During some seasons of the year, there would be continuous daylight, and one star would illuminate one side of the Earth, and another star would illuminate the other side.”

“But that sun's light isn't always scorching, because one of the stars is farther away.”

“At other times of the year, both stars will illuminate the same side of the Earth, and one star will appear much larger than the other.”

of study will be published in astronomy magazine.

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Malena Rice other. 2024. Orbital geometry and stellar inclination of multistar systems hosting exoplanets. A.J., in press. arXiv: 2401.04173