ESO: First Image of a Multi-Planet System around a Sun-like Star

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ESO: First Image of a Multi-Planet System around a Sun-like Star

Post by bystander » Wed Jul 22, 2020 6:31 pm

First Ever Image of a Multi-Planet System around a Sun-like Star
ESO Photo Release | VLT | SPHERE | 2020 Jul 22
The European Southern Observatory’s Very Large Telescope (ESO’s VLT) has taken the first ever image of a young, Sun-like star accompanied by two giant exoplanets. Images of systems with multiple exoplanets are extremely rare, and — until now — astronomers had never directly observed more than one planet orbiting a star similar to the Sun. The observations can help astronomers understand how planets formed and evolved around our own Sun.

Just a few weeks ago, ESO revealed a planetary system being born in a new, stunning VLT image. Now, the same telescope, using the same instrument, has taken the first direct image of a planetary system around a star like our Sun, located about 300 light-years away and known as TYC 8998-760-1. ...

The two gas giants orbit their host star at distances of 160 and about 320 times the Earth-Sun distance. This places these planets much further away from their star than Jupiter or Saturn, also two gas giants, are from the Sun; they lie at only 5 and 10 times the Earth-Sun distance, respectively. The team also found the two exoplanets are much heavier than the ones in our Solar System, the inner planet having 14 times Jupiter’s mass and the outer one six times.

Bohn’s team imaged this system during their search for young, giant planets around stars like our Sun but far younger. The star TYC 8998-760-1 is just 17 million years old and located in the Southern constellation of Musca (The Fly). ...

Two Directly Imaged, Wide-orbit Giant Planets around the Young, Solar Analog TYC 8998-760-1 ~ Alexander J. Bohn et al
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Ann
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Re: ESO: First Image of a Multi-Planet System around a Sun-like Star

Post by Ann » Thu Jul 23, 2020 5:15 pm

TYC 8998-760-1 may or may not be a Solar analog. It is definitely cooler than the Sun, at spectral class K3IV. It is probably fainter than the Sun, too. But it may possibly be a Solar analog all the same, since very young stars are expected to be both cooler and fainter than older stars like the Sun.

I note that this star has a Gaia designation. Is there a math whiz among the bright people here who would like to figure out the magnitude of this star using its Gaia parallax?

Ann
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