About: AR Scorpii

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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).

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  • 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. (en)
  • AR Scorpii ist ein veränderliches Doppelsternsystem bestehend aus einem Weißen Zwerg und einem Roten Zwerg im Sternbild Skorpion. Es befindet sich in einer Entfernung von etwa 384 Lichtjahren. Ursprünglich hielt man das System für einen veränderlichen Delta-Scuti-Einzelstern. Erst durch Amateurastronomen wurde erkannt, dass es sich dabei um etwas besonderes handelt, worauf das System genauer untersucht wurde. Entsprechend wurde die Doppelsternnatur erst im Jahre 2016 entdeckt. (de)
  • さそり座AR星(さそりざARせい、英語: AR Scorpii)は、さそり座の方向に約380光年離れた位置にある連星系である。主星は白色矮星で、伴星は太陽よりも小さな赤色矮星である。 (ja)
  • AR Scorpii (AR Sco) – gwiazda podwójna w gwiazdozbiorze Skorpiona. Jest to układ złożony z białego karła i czerwonego karła, odległy od Ziemi o około 380 lat świetlnych. (pl)
  • AR Скорпиона (лат. AR Scorpii) — двойная звезда, которая находится в созвездии Скорпион на расстоянии около 380 световых лет от нас. (ru)
  • 天蠍座AR(AR Scorpii,縮寫:AR Sco)是由快速自轉且有強磁場的白矮星和紅矮星組成的聯星系統。該系統的白矮星是第一顆被發現的白矮星脈衝星。 (zh)
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  • M5 (en)
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  • Red dwarf (en)
  • White dwarf (en)
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  • J2000 (en)
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  • −51.469 (en)
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  • 0.010000 (xsd:double)
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  • 117.0 (dbd:second)
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  • AR Scorpii ist ein veränderliches Doppelsternsystem bestehend aus einem Weißen Zwerg und einem Roten Zwerg im Sternbild Skorpion. Es befindet sich in einer Entfernung von etwa 384 Lichtjahren. Ursprünglich hielt man das System für einen veränderlichen Delta-Scuti-Einzelstern. Erst durch Amateurastronomen wurde erkannt, dass es sich dabei um etwas besonderes handelt, worauf das System genauer untersucht wurde. Entsprechend wurde die Doppelsternnatur erst im Jahre 2016 entdeckt. (de)
  • さそり座AR星(さそりざARせい、英語: AR Scorpii)は、さそり座の方向に約380光年離れた位置にある連星系である。主星は白色矮星で、伴星は太陽よりも小さな赤色矮星である。 (ja)
  • AR Scorpii (AR Sco) – gwiazda podwójna w gwiazdozbiorze Skorpiona. Jest to układ złożony z białego karła i czerwonego karła, odległy od Ziemi o około 380 lat świetlnych. (pl)
  • AR Скорпиона (лат. AR Scorpii) — двойная звезда, которая находится в созвездии Скорпион на расстоянии около 380 световых лет от нас. (ru)
  • 天蠍座AR(AR Scorpii,縮寫:AR Sco)是由快速自轉且有強磁場的白矮星和紅矮星組成的聯星系統。該系統的白矮星是第一顆被發現的白矮星脈衝星。 (zh)
  • 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). (en)
rdfs:label
  • AR Scorpii (de)
  • AR Scorpii (en)
  • さそり座AR星 (ja)
  • AR Scorpii (pl)
  • AR Скорпиона (ru)
  • 天蠍座AR (zh)
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  • AR Scorpii (en)
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