Poster Open Access

The Curious Case of Betelgeuse

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


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  <dc:creator>Granzer, Thomas</dc:creator>
  <dc:creator>Weber, Michael</dc:creator>
  <dc:creator>Strassmeier, Klaus G.</dc:creator>
  <dc:creator>Dupree, Andrea</dc:creator>
  <dc:date>2021-02-25</dc:date>
  <dc:description>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.</dc:description>
  <dc:identifier>https://zenodo.org/record/4561732</dc:identifier>
  <dc:identifier>10.5281/zenodo.4561732</dc:identifier>
  <dc:identifier>oai:zenodo.org:4561732</dc:identifier>
  <dc:relation>doi:10.5281/zenodo.4561731</dc:relation>
  <dc:relation>url:https://zenodo.org/communities/coolstars20half</dc:relation>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>https://creativecommons.org/licenses/by/4.0/legalcode</dc:rights>
  <dc:subject>Post main sequence cool stars</dc:subject>
  <dc:title>The Curious Case of Betelgeuse</dc:title>
  <dc:type>info:eu-repo/semantics/conferencePoster</dc:type>
  <dc:type>poster</dc:type>
</oai_dc:dc>
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