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@PierreKervella | |||||
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The latest @AAVSO observations show that #Betelgeuse continues to decrease in luminosity in the visible. But in the #infrared (JH bands) its is constant. It could mean that a lot of dust (transparent in the #infrared) is forming and blocks a big part of the visible star light.
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Pierre Kervella
@PierreKervella
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9. sij |
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Planetarium Bochum
@PlanetariumBO
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2. velj |
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In astronomerstelegram.org/?read=13439 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
@PierreKervella
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2. velj |
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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
@cq_cla
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10. sij |
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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.
@gabumb
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20. sij |
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Very huge amount of dust!
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