Results 91 to 100 of about 4,999 (221)
Whither or Wither the Sulfur Anomaly in Planetary Nebulae?
The Astrophysical Journal LettersWe present a thorough investigation of the long-standing sulfur anomaly enigma. Our analysis uses chemical abundances from the most extensive data set available for 126 planetary nebulae (PNs) with improved accuracy and reduced uncertainties from a 10° ×
Shuyu Tan, Quentin A. Parker
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Planetary Nebulae surveys: Past, Present and Future
, 2010 In this review we cover the detection, identification and astrophysical importance of planetary nebulae (PN). The legacy of the historic Perek & Kohoutek and Acker et al.
Frew, DJ, Parker, QA
core
On the Origin of Morphological Structures of Planetary Nebulae
Galaxies, 2018 We suggest that most of the mass in planetary nebulae (PNe) resides in the equatorial region and the spherical envelope and the optically bright lobes of PNe are in fact low-density cavities cleared out by fast outflows and photoionized by UV photons ...
Sun Kwok
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Automatic Derivation of Statistical Data Analysis Algorithms: Planetary Nebulae and Beyond
, 2003 AUTOBAYES is a fully automatic program synthesis system for the data analysis domain. Its input is a declarative problem description in form of a statistical model; its output is documented and optimized C/C++ code.
Schumann, Johann +7 more
core
Detection of CH in the O-rich Planetary Nebula NGC 6302
The Astrophysical JournalPlanetary nebulae are sites where ejected stellar material evolves into complex molecules, but the precise physical conditions and chemical routes that govern these processes are unclear.
Charmi Bhatt +35 more
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Morphological structures of planetary nebulae
, 2010 Since various structural components of planetary nebulae (PN) manifest themselves differently, a combination of optical, infrared, submillimetre and radio techniques is needed to derive a complete picture of planetary nebulae.
Kwok, S
core +1 more source
A new population of planetary nebulae candidates towards the Galactic bulge
, 2013 We discuss discovery of a new population of up to 300 planetary nebulae (PNe) candidates captured serendipitously in deep [OIII] imaging of the Galactic Bulge taken with the Mosaic II wide-field CCD imager on the Cerro Tololo Inter-American Observatory's
Stenborg, TN, Parker, QA
core
The Astronomical JournalSpectroscopic observations of various tracers in nearby galaxies, such as Andromeda (M31), play a crucial role in identifying and classifying individual stellar populations and nebular objects, thereby enhancing our understanding of galactic composition,
Pinjian Chen +7 more
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GalaxiesWe present a brief review of the formation and evolution of hydrogen-deficient central stars of planetary nebulae. We include a detailed description of the main observable features of both the central stars and their surrounding nebulae and review their ...
Marcelo M. Miller Bertolami
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