Results 111 to 120 of about 4,999 (221)
PyEMILI: A New Generation Computer-aided Spectral Line Identifier
The Astrophysical Journal Supplement SeriesDeep high-dispersion spectroscopy of Galactic photoionized gaseous nebulae, mainly planetary nebulae and H ii regions, has revealed numerous emission lines.
Zhijun Tu +3 more
doaj +1 more source
New young planetary nebulae in IPHAS
, 2009 Aims. We search for very small-diameter galactic planetary nebulae (PNe) representing the earliest phases of PN evolution. The IPHAS catalogue of Hα-emitting stars provides a useful basis for this study since all sources present in this catalogue must ...
GLORIA INMACULADA DELGADO INGLADA +1 more
core
Wolf-Rayet Central Stars of Planetary Nebulae: Their Evolution and Properties
, 2010 Over the past decade, the number of planetary nebula central stars (CSPN) known to exhibit the Wolf-Rayet (WR) phenomenon has grown substantially. Many of these discoveries have resulted from the Macquarie/AAO/Strasbourg Halpha (MASH) PN Survey. While WR
Frew, DJ +3 more
core
The mystery of unidentified infrared emission bands. [PDF]
Astrophys Space Sci, 2022 Kwok S.
europepmc +1 more source
Planetary Nebulae, Tracers of Stellar Nucleosynthesis
, 2006 We review the information that planetary nebulae and their immediate progenitors, the post-AGB objects, can provide to probe the nucleosynthesis and mixing in low- and intermediate-mass stars.
Stasinska, Grazyna, G. Stasińska
core +1 more source
The Secular Evolution of Planetary Nebula IC 418 and Its Implications for Carbon Star Formation
The Astrophysical Journal LettersThe rate of stellar evolution can rarely be measured in real time. The fastest evolution (excluding event-driven evolution), where stars may evolve measurably over decades, is during the post–Asymptotic Giant Branch (AGB) phase. In this Letter we provide
Albert A. Zijlstra, Quentin A. Parker
doaj +1 more source
A study of four multipolar planetary nebulae in the Galactic bulge
Astronomy & AstrophysicsWe present infrared (IR) spectroscopic and optical morphological analyses of four multipolar young planetary nebulae (PNe) located in the Galactic bulge (GB) to investigate their dust characteristics and complex multi-lobed structures.
Wen Shi-Bo +5 more
doaj +1 more source
PHOTOELECTRIC SPECTROPHOTOMETRY OF PLANETARY NEBULAE [PDF]
Proceedings of the National Academy of Sciences, 1954 W, Liller, L H, Aller
openaire +2 more sources
The iron abundance in galactic planetary nebulae ⃰
, 2009 We constrain the iron abundance in a sample of 33 low-ionization Galactic planetary nebulae (PNe) using [Fe III] lines and correcting for the contribution of higher ionization states with ionization correction factors that take into account uncertainties
GLORIA INMACULADA DELGADO INGLADA +1 more
core
Polycyclic aromatic hydrocarbons and molecular hydrogen in oxygen-rich planetary nebulae: the case of NGC 6720. [PDF]
Mon Not R Astron Soc, 2016 Cox NL +4 more
europepmc +1 more source