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Pierre Kervella
The latest observations show that continues to decrease in luminosity in the visible. But in the (JH bands) its is constant. It could mean that a lot of dust (transparent in the ) is forming and blocks a big part of the visible star light.
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Pierre Kervella 9. sij
Odgovor korisniku/ci @AAVSO
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Planetarium Bochum 2. velj
Odgovor korisniku/ci @PierreKervella @AAVSO
In they are concluding - with various caveats - that the overall luminosity of the star has dropped by over 20% ... but how could one distinguish that from a dust formation effect? Does anyone measure the *full* SED of Alf Ori on a regular basis?
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Pierre Kervella 2. velj
Odgovor korisniku/ci @PlanetariumBO @AAVSO
Unfortunately this is not possible to observe a full SED of Betelgeuse in "one shot" as the instruments (telescopes, detectors) are different depending on the wavelength domains.
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Claudia 10. sij
Odgovor korisniku/ci @PierreKervella @AAVSO
I very much believe in the dust formation scenario. What is the standard variation delta_JH expected for RSG? Usually variability amplitude is smaller at longer wavelength.
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Gabriele Umbriaco, Ph.D. 20. sij
Odgovor korisniku/ci @PierreKervella @AAVSO
Very huge amount of dust!
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