Results 91 to 100 of about 27,938 (255)

Abundances in Planetary Nebulae [PDF]

Symposium - International Astronomical Union, 1989
Good progress has been made since the last Symposium on the determination of planetary nebulae (PN) abundances. Notable features for modern abundance determinations include the availability of good collision strengths and transition probabilities (reviewed by C.
openaire   +2 more sources

Multiple outflows in the planetary nebula NGC 6058

, 2013
We present narrow-band [O III]lambda5007 and H-alpha images, as well as long-slit high-resolution echelle spectra of the planetary nebula NGC 6058. Our data reveal that NGC 6058 is a multipolar planetary nebula of about ~45 arcsec in extent and formed by
Ayala, S., Contreras, M. E., Guillén, P. F., Miranda, L. F., Ortiz-Ambriz, A., Vázquez, R., Zavala, S.   +6 more
core   +1 more source

Pinpointing the Position of the Post-AGB Star at the Core of RAFGL 2688 using Polarimetric Imaging with NICMOS [PDF]

, 2000
We have used infrared polarimetric imaging with NICMOS to determine precisely the position of the star that illuminates (and presumably generated) the bipolar, pre-planetary reflection nebula RAFGL 2688 (the Egg Nebula).
Hines, Dean C., Kastner, Joel H., Sahai, Raghvendra, Weintraub, David A.   +3 more
core   +2 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

The morphology of dust emission in Planetary Nebulae and proto-Planetary Nebulae [PDF]

Symposium - International Astronomical Union, 1997
This review covers recent results from ground based mid-infrared (mid–IR; 8–25μm) imaging of thermal dust emission. The mid–IR images of proto–PNe show evidence for axially symmetric superwinds. In young PNe, the dust appears to be well mixed with the gas in the ionized gas regions.
openaire   +2 more sources

Role of Magma Oceans in Controlling Carbon and Oxygen of Sub-Neptune Atmospheres

The Astrophysical Journal
Most exoplanets with a few Earth radii are more inflated than bare-rock planets with the same mass, indicating a substantial volatile amount. Neither the origin of the volatiles nor the planet’s bulk composition can be constrained from the mass–radius ...
Chanoul Seo, Yuichi Ito, Yuka Fujii
doaj   +1 more source

He II Raman Scattered Line by Neutral Hydrogen in the Bipolar Platenary Nebula M2-9 [PDF]

Journal of Astronomy and Space Sciences, 2001
In the spectrum of the young bipolar planetary nebula M2-9 obtained from the 1.5 m telescope at the Cerro Tololo Inter-American Observatory, we detected the He~II feature at 6545 Å that are proposed to be formed via Raman scattering by atomic hydrogen ...
Hee-Won Lee, Young Woon Kang
doaj  

Planetary nebulae : getting closer to an unbiased binary fraction

, 2012
Why 80% of planetary nebulae are not spherical is not yet understood. The Binary Hypothesis states that a companion to the progenitor of the central star of a planetary nebula is required to shape the nebula and even for a planetary nebula to be formed ...
Bojicic, I., De Marco, O., Douchin, D., Frew, D. J., Hillwig, T. C., Jacoby, G. H., Jasniewicz, G., Parker, Q. A.   +7 more
core  

Hydrodynamic simulations of captured protoatmospheres around Earth-like planets

, 2015
Young terrestrial planets, when they are still embedded in a circumstellar disk, accumulate an atmosphere of nebula gas. The evolution and eventual evaporation of the protoplanetary disk affect the structure and dynamics of the planetary atmosphere ...
Dorfi, Ernst, Lammer, Helmut, Stoekl, Alexander   +2 more
core   +1 more source

Investigating potential planetary nebula/cluster pairs [PDF]

, 2013
Fundamental parameters characterizing the end-state of intermediate-mass stars may be constrained by discovering planetary nebulae (PNe) in open clusters (OCs).
A. C. Gormaz-Matamala, A.-N. Chené, Acker, Acker, Ahumada, Amnuel, Ausseloos, Battinelli, Benedict, Bensby, Bergeron, Bonanos, Bonatto, Bonatto, Bonatto, Borissova, Borissova, Brand, C. Bonatto, C. Moni Bidin, Cahn, Cahn, Cardelli, Carraro, Cazetta, Cazetta, Chené, Coelho, Corradi, D. Geisler, D. Majaess, D. Minniti, D. Turner, Dambis, de la Fuente Marcos, de Steene, Delgado, Delgado, Dias, Dopita, Durand, Eggen, Emerson, F. Mauro, Fitzgerald, Fouqué, G. Carraro, García-Rojas, Gathier, Gesicki, Giammanco, Girardi, Glushkova, Harrington, Hasan, Henize, Horne, Hron, J. Borissova, Jacob, Kharchenko, Kharchenko, Kholopov, Kiss, Lada, Larsen, MacConnell, Maciel, Majaess, Majaess, Majaess, Majaess, Majaess, Majaess, Majaess, Majaess, Mallik, Matsuura, Mauro, Meatheringham, Mendez, Mermilliod, Mermilliod, Mermilliod, Minniti, Moehler, Moffat, Moffat, Moitinho, Moni Bidin, Moni Bidin, Moni Bidin, Moni Bidin, Morse, Murakami, Napiwotzki, Neckel, Netopil, Parker, Parker, Pauls, Peña, Phelps, Phillips, Phillips, Phillips, Phillips, Piatti, R. G. Kurtev, Roeser, Russeil, Saffer, Sahai, Saito, Saito, Santos, Schmidt-Kaler, Schweizer, Schönberner, Schönrich, Simkin, Skrutskie, Soderblom, Stetson, Stetson, Storm, Tajitsu, Tonry, Turner, Turner, Turner, Turner, Tylenda, van Leeuwen, W. Gieren, Wegner, Weidemann, Westerlund, Woodward, Wright, Zagury, Zhang   +141 more
core   +4 more sources