7 citations · 9 across the 4 of their papers we have counts for
5 papers · 1 filter
Intermediate- and high-resolution optical spectroscopy on the nascent planetary nebula Vy 2-2: Evidence of binary-star evolution
Roldán A. Cala, Luis F. Miranda, José F. Gómez +2
Planetary nebulae (PNe) tend to show spectacular non-spherical shapes whose origin is not fully understood. Crucial information about PNe formation can be obtained by studying thei…
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…
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…
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…
Searching for nascent planetary nebulae: OHPNe candidates in the SPLASH survey
Roldán A. Cala, José F. Gómez, Luis F. Miranda +7
The evolution of asymptotic giant branch stars from the spherical symmetry into the diverse shapes of planetary nebulae (PNe) is a topic of intensive research. Young PNe provide a…