asteroseismology: what’s it good for?asteroseismology: what’s it good for? lots! tina time...
TRANSCRIPT
ASTEROSEISMOLOGY:
WHAT’S IT GOOD FOR?
Engin, Ditte, Thomas
A.K.A: Team HANS-ome
Basic stellar properties
• Time series analysis of Kepler data for main sequence
stars
• Determine Mass, Radius, Age of main sequence stars
Asteroseismology overview
• Why and how stars oscillate
Vichi
Time series
Power Spectra
Chaplin 2011
Power Spectra
Chaplin 2013
Power Spectra
Power Spectra-identifying modes
Power Spectra-identifying modes
Echelle Diagrams
Echelle Diagrams-mixed modes
Mass-Age diagram
White 2011
Stellar scaling relations
Comparison of Results
Target Teff
Mass
(solar)
Luminosity
(solar)
Radius
(solar)
Age
(Gyr)
Simon 5360 0.94 0.63 0.92 5.9
Kai 6340 1.1 2.16 1.22 3.9
Karsten 6060 0.90 2.50 1.44 N/A
Frank 6090 1.16 5.04 2.02 N/A
Stellar Ageing
Stellar Ageing
HR Diagram
Comparison of Results
Target Results large separation (μHz)
Other sources (μHz) Difference (%)
Vichi 64.7 65.1 0.614 Simon 149.2 149.1 -0.067
Karsten 74.9 74.7 -0.268
Silva Aguirre et al 2012
Chaplin et al 2013
ASTEROSEISMOLOGY:
WHAT’S IT GOOD FOR?
Lots!