Results 161 to 170 of about 245,593 (320)
The binary fraction of planetary nebula central stars I. A high-precision, I-band excess search [PDF]
, 2012 We still do not know what causes aspherical planetary nebula (PN) morphologies. A plausible hypothesis is that they are due to the presence of a close stellar or substellar companion. So far, only ∼40 binary central stars of PN have been detected, almost
O. Marco +4 more
semanticscholar +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
MULTI-STAGES OPTIMIZED PHOTOIONIZATION MODELLING OF PLANETARY NEBULA LMC SMP-21
Odessa Astronomical Publications, 2012 The new approximation expression for the representation of gas density distribution in planetary nebulae envelopes was proposed. The new multi-stages method for the caclulation of the chemical composition and physical parameters of planetary nebulae ...
B. Ya. Melekh +5 more
doaj +1 more source
Classification of Planetary Nebulae through Deep Transfer Learning
Galaxies, 2020 This study investigate the effectiveness of using Deep Learning (DL) for the classification of planetary nebulae (PNe). It focusses on distinguishing PNe from other types of objects, as well as their morphological classification.
Dayang N. F. Awang Iskandar +6 more
doaj +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
Abell 41: shaping of a planetary nebula by a binary central star?
, 2010 We present the first detailed spatio-kinematical analysis and modelling of the planetary nebula Abell 41, which is known to contain the well-studied close-binary system MT Ser.
Abell +41 more
core +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
Testing the binary hypothesis for the formation and shaping of planetary nebulae
, 2012 There is no quantitative theory to explain why a high 80% of all planetary nebulae are non-spherical. The Binary Hypothesis states that a companion to the progenitor of a central star of planetary nebula is required to shape the nebula and even for a ...
Bojicic, I. +7 more
core
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