The Search for Binaries in Post-Asymptotic Giant Branch Stars: Do Binary Companions Shape the Nebulae? [PDF]
Journal of Astronomy and Space Sciences, 2012 Binary companions are often invoked to explain the axial and point symmetry seen in the majority of planetary nebulae and proto-planetary nebulae (PPNs).
Bruce J. Hrivnak
doaj +1 more source
Low-ionization structures in planetary nebulae – I. Physical, kinematic and excitation properties [PDF]
, 2015 Though the small-scale, low-ionization knots, filaments and jets (LISs) of planetary nebulae (PNe) are known for ~30yr, some of their observational properties are not well established.
S. Akras, D. R. Gonçcalves
semanticscholar +1 more source
Millimetre Observations of Maser-Emitting Planetary Nebulae
Galaxies, 2022 Observations in the millimetre bands of maser-emitting planetary nebulae (PNe) are crucial to study their circumstellar molecular gas at the beginning of the PN phase.
Lucero Uscanga +9 more
doaj +1 more source
THE PROGENITORS AND LIFETIMES OF PLANETARY NEBULAE [PDF]
, 2015 Planetary nebulae (PNe) are among the most spectacular objects produced by stellar evolution, but the exact identity of their progenitors has never been established for a large and homogeneous sample. We investigate the relationship between PNe and their
C. Badenes, D. Maoz, R. Ciardullo
semanticscholar +1 more source
A Preferred Orientation Angle for Bipolar Planetary Nebulae
Galaxies, 2020 We present preliminary results from measuring Galactic orientation angles of 766 elliptical and bipolar Planetary Nebulae (PNe) in the Hong Kong/Australian Astronomical Observatory/Strasbourg Observatory H-alpha Planetary Nebula research platform and ...
Andreas Ritter, Quentin A. Parker
doaj +1 more source
Planetary systems and real planetary nebulae from planet destruction near white dwarfs [PDF]
, 2015 Abnormal accumulation of TDP-43 and FUS proteins is found in a neurodegenerative disease amyotrophic lateral sclerosis. Here the authors show by modelling the disease in worms that these proteins activate local and distal immune responses, and blocking ...
Ealeal Bear, N. Soker
semanticscholar +1 more source
Evaluating Investment in Space Programs: A Case for Theoretical Pluralism
Financial Accountability &Management, EarlyView.ABSTRACT A perennial question repeatedly asked since the early Mercury (USA) and Salyut (then Soviet Union) space programs has been variations on the theme of “how can the cost of space exploration be justified?” This question—which in broad terms constitutes the research question considered in this paper—continues to be directed toward space agencies ...
Basil P. Tucker, Hank C. Alewine
wiley +1 more source
THE MASSES OF THE IONIZED GAS OF PLANETARY NEBULAE ENVELOPES IN LARGE MAGELLANIC CLOUD
Odessa Astronomical Publications, 2013 The masses of ionized gas in the shells of planetary nebulae which belong in the Large Magellanic Cloud are calculated by three different ways. The value of mass is calculated for the cases: 1) spherical, 2) elliptical forms of envelopes and 3) commonly ...
V. Holovatyy, A. Demchyna
doaj +1 more source
The fraction of type Ia supernovae exploding inside planetary nebulae (SNIPs) [PDF]
, 2014 Using three independent directions we estimate that the fraction of type Ia supernovae (SNe Ia) exploding inside planetary nebulae (PNe), termed SNIPs,is at least ~20%. Our three directions are as follows.
D. Tsebrenko, N. Soker
semanticscholar +1 more source
Decisions Under Radical Uncertainty: The Role of Volitional Liminality in Radical Innovation
Journal of Product Innovation Management, EarlyView.ABSTRACT Academic Summary Radical innovation management can be understood as an organizational practice that enacts distant futures, which are open‐ended and unknowable. Such radical innovation endeavors are thus characterized by radical uncertainty, where possible futures are not only quantitatively but qualitatively different from the present, and ...
José Antonio Rosa +2 more
wiley +1 more source