Results 101 to 110 of about 53,151 (238)
Close Binaries and the Abundance Discrepancy Problem in Planetary Nebulae
Galaxies, 2018 Motivated by the recent establishment of a connection between central star binarity and extreme abundance discrepancies in planetary nebulae, we have carried out a spectroscopic survey targeting planetary nebula with binary central stars and previously ...
R. Wesson +4 more
doaj +1 more source
Rapid Communications in Mass Spectrometry, Volume 39, Issue 13, 15 July 2025.ABSTRACT Rationale Matrix effects by secondary ion mass spectrometry (SIMS) are empirically corrected by calibration using matrix‐matched reference materials. However, conventional parametric regression cannot estimate the prediction uncertainty to account for the difference in compositions of new data and reference materials. Applying Gaussian process
Keita Itano +5 more
wiley +1 more source
On the Origin of Morphological Structures of Planetary Nebulae
Galaxies, 2018 We suggest that most of the mass in planetary nebulae (PNe) resides in the equatorial region and the spherical envelope and the optically bright lobes of PNe are in fact low-density cavities cleared out by fast outflows and photoionized by UV photons ...
Sun Kwok
doaj +1 more source
René Girard's Revision and Misapprehension of Psychoanalysis
International Journal of Applied Psychoanalytic Studies, Volume 22, Issue 2, June 2025.ABSTRACT René Girard's theories of mimetic desire, religious sacrifice, and violence have been immensely provocative and influential. His ways of framing literary desire and conflict are fascinating, as they illustrate how desire and rivalry unleashed lead to violence and derangement.
Jerry S. Piven
wiley +1 more source
In Search of Possible Associations between Planetary Nebulae and Open Clusters [PDF]
, 2007 We consider the possibility of cluster membership for 13 planetary nebulae that are located in close proximity to open clusters lying in their lines of sight. The short lifetimes and low sample size of intermediate-mass planetary nebulae with respect to nearby open clusters conspire to reduce the probability of observing a true association.
arxiv +1 more source
A new Planetary Nebula in the outer reaches of the Galaxy [PDF]
, 2011 A proper determination of the abundance gradient in the Milky Way requires the observation of objects at large galactiocentric distances. With this aim, we are exploring the planetary nebula population towards the Galactic Anticentre. In this article, the discovery and physico-chemical study of a new planetary nebula towards the Anticentre direction ...
arxiv +1 more source
The Meteoritical Society: Business from 2023 to 2024
Meteoritics &Planetary Science, Volume 60, Issue 3, Page 680-696, March 2025.
Nancy L. Chabot +2 more
wiley +1 more source
Symposium - International Astronomical Union, 1993 As a complement to the “Strasbourg–ESO Catalogue of Galactic Planetary Nebulae” (Acker et al. 1992), we give the list of newly discovered planetary nebulae.
openaire +2 more sources
Properties of Proto--Planetary Nebulae [PDF]
arXiv, 2000 This review describes some general properites of proto-planetary nebulae with particular emphasis on the recent work of morpholgical studies. The weight of observational evidence shows that proto-planetary nebulae (PPNe) are most certainly axisymmetric like planetary nebulae.
arxiv
Catalogues of Planetary Nebulae [PDF]
Symposium - International Astronomical Union, 1989 Firstly, the general requirements concerning catalogues are studied for planetary nebulae, in particular concerning the objects to be included in a catalogue of PN, their denominations, followed by reflexions about the afterlife and computerized versions of a catalogue.
openaire +2 more sources