AR Scorpii (AR Sco) is a binary pulsar that consists of a white dwarf and a red dwarf. It is located close to the ecliptic plane in the constellation Scorpius. Parallax measurements made by Gaia put the system at a distance of about 380 light-years (120 parsecs). AR Scorpii is the first, and as of 2021, the only "white dwarf-pulsar" to be discovered. Its unusual nature was first noticed by amateur astronomers. The 3.56-hour period in AR Scorpii's light curve caused it to be misclassified as a Delta Scuti variable, but in 2016, this period was found to be the binary orbital period. In addition, the system shows very strong optical, ultraviolet, and radio pulsations originating from the red dwarf with a period of just 1.97 minutes, which is a beat period from the orbital rotation and the white dwarf spin. These pulsations occur when a relativistic beam from the white dwarf sweeps across the red dwarf, which then reprocesses the beam into the observed electromagnetic energy. Although the white dwarf shows evidence of accretion in the past, at present it is not accreting significantly, and the system is powered by the spin-down of the white dwarf. The white dwarf's rotation will slow down on a timescale of 107 years. It has a radius of about 7×103 km, about the same size as Earth. (Wikipedia).
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From playlist Scrum Master Training Videos | Edureka
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From playlist SciShow Space
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Hello and welcome to What Da Math! In this video, we will talk about an amazing new discovery of the white dwarf pulsar known as AR Scorpii 380 light years away from us. Patreon page: https://www.patreon.com/user?u=2318196&ty=h Enjoy and please subscribe. Other videos here: https://www
From playlist Universe Sandbox 2
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From playlist Mysteries of the Universe
Unexplained Repeating Radio Signals Detected From The Milky Way's Center
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From playlist The Milky Way
What Are Multiple Star Systems? Double, Triple, Even Seven Star Systems
Not all stars are alone. Some come in pairs and more. And when there are multiple stars in a system, watch the cosmic sparks fly. References: http://www.almaobservatory.org/en/press-room/press-releases/1064-young-stellar-system-caught-in-act-of-forming-close-multiples https://www.cfa.harv
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From playlist Unusual Exoplanets
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From playlist Scrum Master Training Videos | Edureka
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From playlist Agile Scrum Master Training Videos [2022 Updated]
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From playlist Scrum Master Training Videos | Edureka
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