Aims: The determination of reliable distances to planetary nebulae (PNe) is a major difficulty in the study of this class of objects in the Galaxy. The...
IPHASX J052531.2+281946: a new Planetary Nebula towards the Galactic Anticentre
A planetary nebula has been discovered in the course of the INT/WFC Photometric Hα Survey (IPHAS) of the northern galactic plane. It is located near the...
IRAS 06562-0337 - Final mass-loss episodes before the formation of a planetary nebula?
The onset of forbidden line emission in the spectrum of a proto-planetary nebula has been detected for the first time in the lapse of only two years. IRAS 06562...
IRAS 16455-3455 and IRAS 15154-5258 - Two new southern planetary nebulae
The identification of two new southern planetary nebulae, IRAS 16455-3455 and IRAS 15154-5258, via low resolution spectroscopy, is reported. IRAS 16455-3455 is...
IRAS 17423-1755 (Hen 3-1475) Revisited: An O-rich High-mass Post-asymptotic Giant Branch Star
The high-resolution (R ~ 600) Spitzer/IRS spectrum of the bipolar protoplanetary nebula (PN) IRAS 17423-1755 is presented in order to clarify the dominant...
IRAS 17423-1755: A BQ() star with a variable velocity outflow
Infrared Astronomy Satellite (IRAS) 17423-1755 has been identified as a BQ() star. Its more remarkable observed features are large radial velocities, huge line...
IRAS 17423-1755: a massive post-AGB star evolving into the planetary nebula stage?
IRAS 17423-1755 has been recognized as a new bipolar nebula during a multi-wavelength observational program of unidentified IRAS sources with far infrared...
IRAS 22568 + 6141 - A new bipolar planetary nebula
The identification of a bipolar planetary nebula is reported with a description of its characteristics. The nebula IRAS 22568 + 6141 has an extension of 8...