Results 41 to 50 of about 28,676 (218)

Binary Interactions, High-Speed Outflows and Dusty Disks during the AGB-To-PN Transition

Galaxies, 2018
It is widely believed that the dramatic transformation of the spherical outflows of AGB stars into the extreme aspherical geometries seen during the planetary nebula (PN) phase is linked to binarity and driven by the associated production of fast jets ...
Raghvendra Sahai
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, Marigo, Pottasch, R. Ciardullo, Rejkuba, Richer, Schönberner, Viironen   +7 more
core   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

Discovery of a planetary nebula surrounding the symbiotic star DT Serpentis

, 2013
We report the discovery of a planetary nebula centered on the poorly studied symbiotic binary star DT Ser. In a few other symbiotic stars spatially resolved nebulae have been discovered: however, only one of them might be a genuine planetary nebula ...
Baldinelli, L., Corradi, R. L. M., Maitan, A., Munari, U., Siviero, A.   +4 more
core   +1 more source

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., Lloyd, M., Matsuura, M., Meaburn, J., Redman, M. P., Singh, N.   +5 more
core   +2 more sources

Aggregation and the Structure of Value

Noûs, EarlyView.
ABSTRACT Roughly, the view I call “Additivism” sums up value across time and people. Given some standard assumptions, I show that Additivism follows from two principles. The first says that how lives align in time cannot, in itself, matter. The second says, roughly, that a world cannot be better unless it is better within some period or another.
Weng Kin San
wiley   +1 more source

Panchromatic HST/WFC3 Imaging Studies of Young, Rapidly Evolving Planetary Nebulae. II. NGC 7027

The Astrophysical Journal, 2022
The iconic planetary nebula (PN) NGC 7027 is bright, nearby ( D ∼ 1 kpc), highly ionized, intricately structured, and well observed. This nebula is hence an ideal case study for understanding PN shaping and evolution processes.
Paula Moraga Baez, Joel H. Kastner, Bruce Balick, Rodolfo Montez Jr., Jesse Bublitz   +4 more
doaj   +1 more source

AAOmega radial velocities rule out current membership of the planetary nebula NGC 2438 in the open cluster M46

, 2008
We present new radial velocity measurements of 586 stars in a one-degree field centered on the open cluster M46, and the planetary nebula NGC 2438 located within a nuclear radius of the cluster.
Aller, Blaauw, Bonatto, Campbell, Corradi, Corradi, Cuffey, D. J. Frew, Dobbie, Frew, Frew, Frinchaboy, Goodwin, Gutermuth, Gy. M. Szabó, Hoogerwerf, Jacoby, Jura, Kiss, Kouwenhoven, L. L. Kiss, Majaess, Meatheringham, Mermilliod, Mermilliod, Munari, O'Dell, Parker, Pauls, Phillips, Pierce, Q. A. Parker, Rudy, Sharma, Skrutskie, Spitzer, Stanghellini, Steinmetz, Stetson, Székely, Van de Steene, Veltz, Weidemann, Z. Balog, Zhang, Zwitter   +45 more
core   +1 more source

Birth and early evolution of a planetary nebula [PDF]

, 1998
The final expulsion of gas by a star as it forms a planetary nebula --- the ionized shell of gas often observed surrounding a young white dwarf --- is one of the most poorly understood stages of stellar evolution.
A Frank, A Frank, A Riera, G Mellema, IG Kolesnik, J Cantó, J Maddox, JR Kozok, JR Kozok, Kailash C. Sahu, KC Sahu, KG Henize, KG Henize, KJ Borkowski, KU Ratnatunga, LR Youngelson, M Bobrowsky, M Bobrowsky, M Livio, M Livio, M Morris, M Parthasarathy, M Parthasarathy, M. Parthasarathy, Matthew Bobrowsky, N Soker, Pedro García-Lario, S Casertano, S Kwok, SR Pottasch, T Blöcker, T Blöcker, V Icke, WA Feibelman   +33 more
core   +3 more sources

Jungian categories as modes of reading: The case of Graham Greene's The Heart of the Matter and Aldous Huxley's Time Must Have a Stop

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