Results 81 to 90 of about 205,774 (262)
VLT observations of the asymmetric Etched Hourglass Nebula, MyCn 18 [PDF]
, 2014 Context. The mechanisms that form extreme bipolar planetary nebulae remain unclear. Aims. The physical properties, structure, and dynamics of the bipolar planetary nebula, MyCn 18, are investigated in detail with the aim of understanding the shaping ...
Clyne, N. +5 more
core +2 more sources
Observations and three-dimensional ionization structure of the planetary nebula SuWt 2 ⋆ [PDF]
, 2013 The planetary nebula SuWt 2 (PN G311.0+02.4), is an unusual object with a prominent, inclined central emission ellipse and faint bipolar extens ions. It has two A-type stars in a proven binary system at the centre.
Ashkbiz Danehkar, Q. Parker, B. Ercolano
semanticscholar +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract Enstatite chondrites formed under extremely reducing conditions in the protoplanetary disk. They are derived from two or more parent bodies, EH and EL, and both EH and EL groups contain petrologic type 3–6 samples. The rare lithophile‐ and halogen‐bearing sulfide, djerfisherite, occurs in low abundance in enstatite chondrites, most frequently ...
Peter Mc Ardle +9 more
wiley +1 more source
The Web of Micro-Structures in IC 4593
Galaxies, 2020 In addition to large-scale structures, planetary nebulae (PNe) show small-scale structures that emit mainly in low-ionization species such as [N ii], [S ii], [O ii], and [O i], known as LISs.
M. Belén Mari +2 more
doaj +1 more source
The Origin of the Consistent Planetary Nebula Luminosity Function Bright-end Cutoff
The Astrophysical Journal, 2023 The [O iii ] 5007 Å line is typically the brightest line in planetary nebula (PN) spectra. Observations show that the brightest [O iii ] 5007 Å PN in a galaxy—the planetary nebula luminosity function (PNLF) bright-end cutoff—is surprisingly independent ...
Philippe Z. Yao, Eliot Quataert
doaj +1 more source
The Planetary Nebula Luminosity Function: Pieces of the Puzzle
, 2009 Extragalactic surveys in the emission line of [O III] 5007 have provided us with the absolute line strengths of large, homogeneous sets of planetary nebulae.
Balick +7 more
core +1 more source
HUBBLE SPACE TELESCOPE IMAGING OF THE BINARY NUCLEUS OF THE PLANETARY NEBULA EGB 6 [PDF]
, 2013 EGB 6 is an ancient, low-surface-brightness planetary nebula. The central star, also cataloged as PG 0950+139, is a very hot DAOZ white dwarf (WD) with an apparent M dwarf companion, unresolved from the ground but detected initially through excesses in ...
J. Liebert +6 more
semanticscholar +1 more source
Orbis Litterarum, EarlyView.Abstract This essay advocates renewed attention toward Jungian literary criticism, emphasizing its unique and creative perspectives on both fictional worlds and on reading. A fresh turn to Jungian criticism offers, in particular, valuable insight for texts on the peripheries of the canon.
Edsel Parke
wiley +1 more source
SALT reveals the barium central star of the planetary nebula Hen 2-39 [PDF]
, 2013 Classical barium stars are binary systems which consist of a late-type giant enriched in carbon and slow neutron capture (s-process) elements and an evolved white dwarf (WD) that is invisible at optical wavelengths. The youngest observed barium stars are
B. Miszalski +10 more
semanticscholar +1 more source
Physiology of nitrogen: A life or death matter
Experimental Physiology, EarlyView.Abstract With each breath, four out of every five molecules we inspire are nitrogen (N2), since this gas constitutes ∼80% of the atmospheric air that surrounds us. Despite its abundance and unlike molecular oxygen, N2 has traditionally held less appeal among physiologists given its lack of reactivity and corresponding inability to support combustion or
Damian M. Bailey +2 more
wiley +1 more source