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11 relations: Balmer jump, Band-pass filter, Color index, Extinction (astronomy), Magnesium, Photometric system, Stellar classification, Triplet state, UBV photometric system, Ultraviolet, Vytautas Straižys.
Balmer jump
Balmer jump or Balmer discontinuity is the difference of intensity of the stellar continuum spectrum on both sides of the limit of the Balmer series of hydrogen at 364.6 nm.
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Band-pass filter
A band-pass filter, also bandpass filter or BPF, is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range.
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Color index
In astronomy, the color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature.
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Extinction (astronomy)
In astronomy, extinction is the absorption and scattering of electromagnetic radiation by dust and gas between an emitting astronomical object and the observer.
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Magnesium
Magnesium is a chemical element with symbol Mg and atomic number 12.
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Photometric system
In astronomy, a photometric system is a set of well-defined passbands (or filters), with a known sensitivity to incident radiation.
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Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
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Triplet state
In quantum mechanics, a triplet is a quantum state of a system with a spin of quantum number s.
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UBV photometric system
The UBV photometric system (Ultraviolet, Blue, Visual), also called the Johnson system (or Johnson-Morgan system), is a wide band photometric system for classifying stars according to their colors.
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Ultraviolet
Ultraviolet (UV) is electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays.
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Vytautas Straižys
Vytautas Straižys (born August 20, 1936) is a Lithuanian astronomer.
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References
[1] https://en.wikipedia.org/wiki/Vilnius_photometric_system
