3 papers
astro-ph.SR2025
Low- and high-velocity `water fountains': different evolutionary stages
Roldán A. Cala, Luis F. Miranda, José F. Gómez +1
`Water fountains' (WFs) are optically obscured evolved stars, most of them thought to be in the post-asymptotic giant branch (post-AGB) phase, characterized by HO maser emiss…
astro-ph.SR2024
An interferometric search for SiO maser emission in planetary nebulae
Roldán A. Cala, José F. Gómez, Luis F. Miranda +5
Maser emission of SiO, HO and, OH is widespread in Asymptotic Giant Branch (AGB) stars with oxygen(O)-rich envelopes. This emission quickly disappear during the post-AGB phase…
astro-ph.SR2024
Long and short term variability of the possible nascent planetary nebula IRAS 22568+6141: A late thermal pulse?
Roldán A. Cala, Luis F. Miranda, José F. Gómez +4
IRAS 22568+6141 has been classified as a low-ionisation planetary nebula (PN) and presents non-thermal radio continuum emission, which could be a signature of nascent PNe. We prese…