By taking two images of the same star a few months apart, companions to the star don't move, but background stars jump together (the weird dark rings are artefacts of image processing and also due to diffraction inside the telescope) - spot the companion! 2/npic.twitter.com/pKa1kv8LTV
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Alex got a low resolution spectrum of the object by using narrowband filters - the object's flux is a good match to a 1700K cool companion. Red dots are the data, grey lines are computer model spectra. It's a good fit to me! 3/npic.twitter.com/KiLLqXib2H
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But there are a couple of interesting notes with this - firstly, this is a LONG way out from its parent star, just over 180au! Over twice the distance of Pluto! Who ordered that? Also, it's quite fluffy, having a radius that's quite inflated. Well worth following up! 4/n
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...and to make it more interesting, this was with only looking at the second image of the first 5 stars! We're waiting to hear from
@ESO if we got the telescope time to follow up the other stars. Stay tuned! 5/finPrikaži ovu nit
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You got me really confused for 10 seconds with “70 solar mass stars” but now I get it: 70 stars, each of ~one solar mass ... Pfff
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You are absolutely right, I did not make that clear. Sorry!
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