Ende dieses Seitenbereichs.

Beginn des Seitenbereichs: Inhalt:

02.12.2020 - 17:00

Teilnahme

Termin vormerken: Termin vormerken

Astrophysikalisches Kolloquium

Prof. Dr. Hans Deeg: "Boyajian's star and friends:Strange dips and an unsolved mystery”

Das Institut für Physik Institutsbereich Geophysik, Astrophysik und Meteorologie lädt zu folgendem Vortrag im Rahmen des Astrophysikalischen Kolloquiums ein:

"Boyajian's star and friends: Strange dips and an unsolved mystery”
Prof. Dr. Hans Deeg
Instituto de Astrofísica de Canarias (IAC), Tenerife, Spain

KIC 8462852, also known as Tabby's or Boyajian's star, was an astronomical highlight in 2016, following its discovery in legacy data from the Kepler space mission. Between 2009 and 2013, the star had experienced several strong brightness variations that were unlike that of any other known astronomical object. Posterior, an intense ground-based observing campaign was initiated to closely survey this target. From the numerous smaller posterior dips that have been detected, competing hypotheses for 928 day or 1574 day periodicities of the events have been proposed. These later brightness variations showed also colour-signatures which are compatible with the dips caused by dusty planetesimals or 'exo-comets' - which does not disprove alternative explanations. Several stars with some similarities to Tabby's star have been identified, with an outstanding case found by ASAS-SN in 2019, displaying a deep dip closely resembling those observed by Kepler. A detailed re-observation of such a deep event would provide much better insight into the nature of this phenomena, which is the topic of an ongoing project using the 10m GTC telescope.

Time: Wednesday, December 2, 2020, 17:00 CET (st!)
Meeting: https://unigraz.webex.com/meet/paul.beck

pdf

Aktuell
April 2021
Montag Dienstag Mittwoch Donnerstag Freitag Samstag Sonntag
29 Montag, 29. März 2021 30 Dienstag, 30. März 2021 31 Mittwoch, 31. März 2021 1 Donnerstag, 1. April 2021 2 Freitag, 2. April 2021 3 Samstag, 3. April 2021 4 Sonntag, 4. April 2021
5 Montag, 5. April 2021 6 Dienstag, 6. April 2021 7 Mittwoch, 7. April 2021 8 Donnerstag, 8. April 2021 9 Freitag, 9. April 2021 10 Samstag, 10. April 2021 11 Sonntag, 11. April 2021
12 Montag, 12. April 2021 13 Dienstag, 13. April 2021 14 Mittwoch, 14. April 2021 15 Donnerstag, 15. April 2021 16 Freitag, 16. April 2021 17 Samstag, 17. April 2021 18 Sonntag, 18. April 2021
19 Montag, 19. April 2021 20 Dienstag, 20. April 2021 21 Mittwoch, 21. April 2021 22 Donnerstag, 22. April 2021 23 Freitag, 23. April 2021 24 Samstag, 24. April 2021 25 Sonntag, 25. April 2021
26 Montag, 26. April 2021 27 Dienstag, 27. April 2021 28 Mittwoch, 28. April 2021 29 Donnerstag, 29. April 2021 30 Freitag, 30. April 2021 1 Samstag, 1. Mai 2021 2 Sonntag, 2. Mai 2021

Ende dieses Seitenbereichs.

Beginn des Seitenbereichs: Zusatzinformationen:

Ende dieses Seitenbereichs.