Lesson plan
Lambda Boötis
Lambda Boötis is a star in the northern constellation of Boötes. Its name is a Bayer designation that is Latinized from λ Boötis, and abbreviated Lam Boo or λ Boo. It has the official name Xuange, pronounced . With an apparent visual magnitude of +4.18, it is faintly visible to the naked eye. Based on parallax measurements, it is distant from Earth. This star is drifting closer to the Sun with a radial velocity of −8 km/s. for Lambda Boötis, plotted from TESS data This is a white hued A-type main-sequence star with a stellar classification of A0p λB. It is the prototype of a group of rare stars known as Lambda Boötis stars, all of which are dwarf stars with unusually low abundances of metals in their spectra. Its diameter has been directly measured to be 1.7 times that of the Sun. This is a Delta Scuti variable star with a period of and an amplitude of 0.0020 in visual magnitude. This star displays an infrared excess that may be the result of a circumstellar disk of orbiting debris, or else a bow wave from its motion through the interstellar medium.
Article summary
Lambda Boötis is a star in the northern constellation of Boötes. Its name is a Bayer designation that is Latinized from λ Boötis, and abbreviated Lam Boo or λ Boo. It has the official name Xuange, pronounced . With an apparent visual magnitude of +4.18, it is faintly visible to the naked eye. Based on parallax measurements, it is distant from Earth. This star is drifting closer to the Sun with a radial velocity of −8 km/s. for Lambda Boötis, plotted from TESS data This is a white hued A-type main-sequence star with a stellar classification of A0p λB. It is the prototype of a group of rare stars known as Lambda Boötis stars, all of which are dwarf stars with unusually low abundances of metals in their spectra. Its diameter has been directly measured to be 1.7 times that of the Sun. This is a Delta Scuti variable star with a period of and an amplitude of 0.0020 in visual magnitude. This star displays an infrared excess that may be the result of a circumstellar disk of orbiting debris, or else a bow wave from its motion through the interstellar medium.
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.