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AGB stars of the Magellanic Clouds as seen within the Δa photometric system

Published online by Cambridge University Press:  30 December 2019

Ernst Paunzen Open the ORCID record for Ernst Paunzen [Opens in a new window] ,
Jan Janík ,
Petr Kurfürst ,
Jiří Liška ,
Martin Netopil ,
Marek Skarka  and
Miloslav Zejda
Ernst Paunzen
Affiliation:
Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlářská 2, CZ-611 37 Brno, Czech Republic email: epaunzen@physics.muni.cz
Jan Janík
Affiliation:
Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlářská 2, CZ-611 37 Brno, Czech Republic email: epaunzen@physics.muni.cz
Petr Kurfürst
Affiliation:
Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlářská 2, CZ-611 37 Brno, Czech Republic email: epaunzen@physics.muni.cz
Jiří Liška
Affiliation:
Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlářská 2, CZ-611 37 Brno, Czech Republic email: epaunzen@physics.muni.cz
Martin Netopil
Affiliation:
Department of Astrophysics, University of Vienna, Austria
Marek Skarka
Affiliation:
Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlářská 2, CZ-611 37 Brno, Czech Republic email: epaunzen@physics.muni.cz Astronomical Institute, Czech Academy of Sciences, Czech Republic
Miloslav Zejda
Affiliation:
Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlářská 2, CZ-611 37 Brno, Czech Republic email: epaunzen@physics.muni.cz
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Abstract

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The a-index samples the flux of the 5200 Å region by comparing the flux at the center with the adjacent regions. The final intrinsic peculiarity index Δa was defined as the difference between the individual a-values and the a-values of normal stars of the same colour (spectral type). Here we present, for the first time, a case study to detect and analyse Asymptotic Giant Branch (AGB) stars in the Magellanic Clouds. For this, we use our photometric survey of the Magellanic Clouds within the a-index. We find that AGB stars can be easily detected on the basis of their Δa index in an efficient way.

Keywords

Magellanic Cloudsstars: AGB and post-AGBtechniques: photometric
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S343: Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time , August 2018 , pp. 487 - 488
Copyright
© International Astronomical Union 2019 

References

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Cioni, M.-R.L., Girardi, L., Marigo, P., & Habing, H.J. 2006b, A&A, 452, 195 Google Scholar
Paunzen, E., Stütz, Ch ., & Maitzen, H.M. 2005, A&A, 441, 631 Google Scholar