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.
| Name | Size | |
|---|---|---|
|
betelgeuse.pdf
md5:4a19f3f6bae8984f5a705ff273942403 |
13.3 MB | Download |
|
tgranzer.mp4
md5:72838d30f7eab31b2fcb63af1856b0c8 |
2.6 MB | Download |
| All versions | This version | |
|---|---|---|
| Views | 262 | 262 |
| Downloads | 260 | 260 |
| Data volume | 3.2 GB | 3.2 GB |
| Unique views | 243 | 243 |
| Unique downloads | 214 | 214 |
- Publication date:
- February 25, 2021
- DOI:
-
- Keyword(s):
- Post main sequence cool stars
- Communities:
- License (for files):
- Creative Commons Attribution 4.0 International