Circumstellar effects on the chemical abundances in AGB stars
In this work we explore how the use of dynamical model atmospheres has an impact on the chemical abundances derived in O-rich (massive) AGB stars. In particular...
Circumstellar effects on the Li and Ca abundances in massive Galactic O-rich AGB stars
We explore the circumstellar effects on the Li and Ca abundances determination in a complete sample of massive Galactic AGB stars. The Li abundance is an...
Circumstellar Envelopes as AGB Mass-Loss Signatures
Low- and intermediate-mass stars (1--8 M&sun;) lose up to 80 % of their initial mass during the Asymptotic Giant Branch (AGB) phase. Heavy mass loss is the...
Circumstellar PAHs in IRAS 16594-4656: a new proto-planetary nebula with a strong 21mum dust feature
Based on ISO SWS+LWS observations, we identify IRAS 16594-4656 as a new member of the rare class of C-rich proto-planetary nebulae with the 21 μm dust feature...
CLASP2: The Chromospheric LAyer Spectro-Polarimeter
We present the instrument, science case, and timeline of the CLASP2 sounding rocket mission. The successful CLASP (Chromospheric Lyman-Alpha Spectro-Polarimeter...