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Title:FIRST DETECTION OF THE RADIOACTIVE MOLECULE 26AlF AND ITS SPECTROSCOPIC ASPECTS
Author(s):Breier, Alexander A.
Contributor(s):Kaminski, Tomasz ; Gauss, Jürgen ; Giesen, Thomas ; Fuchs, Guido W
Subject(s):Mini-symposium: Astrochemistry and Astrobiology in the age of ALMA
Abstract:The observation of radioactive isotopes, like $^{26}$Al, gives insights in the earlier nucleosynthesis processes of stellar cores. Until now, the characteristic $\gamma$-photons released during radioactive decay have been used to record their spatial distribution on a large scale, but this method generally fails to identify individual stellar objects due to the limited detection sensitivity.\\ An alternative approach is the observation of molecules containing radioactive isotopes, like $^{26}$AlF. The stable $^{27}$Al-bearing molecule is known to condensate in the outer atmosphere of late-type stars. Radio-telescope facilities, like \textit{ALMA}, can identify these species via their rotational fingerprint. To enable an unambiguous identification the rotational transition frequencies of $^{26}$AlF need to be known with high accuracy.\\ In this work, the first detection of $^{26}$AlF in the merger object \textit{CK Vulpeculae} is reported. The mass-independent molecular parameterization of AlF using a Dunham approach is shown in detail. Further candidate stellar sources of $^{26}$Al will be discussed.\\
Issue Date:2019-06-20
Publisher:International Symposium on Molecular Spectroscopy
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/104325
DOI:10.15278/isms.2019.RG06
Rights Information:Copyright 2019 Alexander A. Breier
Date Available in IDEALS:2019-07-15
2020-01-25


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