Author:
Ogane Y.,Ohshima O.,Taniguchi D.,Takanashi N.
Abstract
We report the results of our continuous UBVRI-band photometry of Betelgeuse from 1999 to 2022 using the same photometric system. There are two advantages in our observation: (1) we used a photodiode as a detector to avoid saturation, and (2) our data set includes U-band light curve, which is not widely observed in recent CCD photometries. Using our light curves, we conducted the periodicity analysis, and found ~405- and ~2160- day periods. We also discuss the tentative detection of a long-period variation over 20 years or longer. Finally, we discuss the peculiar variation of the U - B color index during the 'Great Dimming' event between late 2019 and early 2020.
Subject
Energy Engineering and Power Technology,Fuel Technology
Reference26 articles.
1. Davies, B., & Plez, B. 2021, MNRAS, 508, 5757, 2021MNRAS.508.5757D
2. Dupree, A. K., et al. 1987, ApJL, 317, L85, 1987ApJ...317L..85D
3. Dupree, A. K., et al. 2020, ApJ, 899, 68, 2020ApJ...899...68D
4. Dupree, A. K., et al. 2022, ApJ, 936, 18, 2022ApJ...936...18D
5. Guinan, E., et al. 2020, ATel, 13512, 1, 2020ATel13512....1G
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