Poster Open Access

The Curious Case of Betelgeuse

Granzer, Thomas; Weber, Michael; Strassmeier, Klaus G.; Dupree, Andrea

Since more than a decade, the AIP is monitoring \(\alpha\) Ori with its robotic spectroscopic facility STELLA/SES in Teide observatory, Tenerife along with its automated photoelectric telescope T7 in Fairborn observatory, Az. Additionally, we got access with exclusive two-band photometric data on Betelgeuse from the BRITE satellite consortium, covering the last seven seasons. In late 2019, Betelgeuse showed a rapid brightness decline, reaching an all-time low in Feb. 2020, followed by a quick re-brightening. This poster  shows radial velocity data together with the photometry. The radial velocity follows the photometry in general, but sometimes shows a time-shift, which was particularly visible in the grand dimming event. Interesting is the time-frequency analysis of the different data set: All three show similar features at split-periods around the known P=420d.

Files (15.9 MB)
Name Size
betelgeuse.pdf
md5:4a19f3f6bae8984f5a705ff273942403
13.3 MB Download
tgranzer.mp4
md5:72838d30f7eab31b2fcb63af1856b0c8
2.6 MB Download
262
260
views
downloads
All versions This version
Views 262262
Downloads 260260
Data volume 3.2 GB3.2 GB
Unique views 243243
Unique downloads 214214

Share

Cite as