63: A Pair Of Delta Scuti Lambda Boos

 
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Weirdest episode title ever! From her lockdown bunker in Preston, Emily joins Chris for a special social-distanced episode, talking about a weird binary system found in the TESS data recently. One of the stars is pulsating, but only on one side — which doesn’t happen very often. In fact, this is a first for astronomy, which is always exciting. The star may be close to overloading its Roche lobe, which doesn’t sound good at all. And of course, we’re almost through our run of Super Moons for 2020, with a Pink Moon in April and a Flower Moon in May, so naturally Emily has been on the radio again …

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Syzygy is produced by Chris Stewart and co-hosted by Dr Emily Brunsden from the Department of Physics at the University of York.

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Things we talked about in this episode:

Super Pink Moon, April 2020

Super Flower Moon, May 2020

The Nature Paper on this weird lopsided star (from arxiv)

A phys-org article on the discovery

Delta Scuti stars

Deep Sky video about Delta Scuti stars

Lambda Boo stars

Heartbeat stars

Roche lobes — don’t overfill yours!