Results 111 to 120 of about 53,151 (238)
New Close Binary Central Stars of Planetary Nebulae from Gaia DR3 Epoch Photometry. [PDF]
Res Notes AAS, 2022 Chornay N, Walton NA.
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Planetary Nebulae in the Magellanic Clouds: Probing Stellar Evolution and Populations [PDF]
arXiv, 2002 This review contains: (1) the scientific motivations for studying Planetary Nebulae in the Magellanic Clouds; (2) a review of this field of study, from the origins to the most recent results, focusing on the papers that have been published since the last IAU Symposium on Planetary Nebulae; (3) a review of the Hubble contribution to the field, from the ...
arxiv
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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Ionization-bounded and Density-bounded Planetary Nebulae [PDF]
arXiv, 2009 Planetary nebulae (and in general any photoionized region) can be classified as ionization-bounded or density-bounded. It is important to determine in which case is the planetary nebula studied to be able to estimate from nebular observations, for example, the total rate of ionizing photons produced by the central star.
arxiv
Origin of Planetary Nebulae [PDF]
Symposium - International Astronomical Union, 1967 My interest in the origin of planetary nebulae goes back to 1967 when I proposed that the envelopes of giants with degenerate carbon-helium cores were dynamically unstable and would be completely ejected to form a planetary nebula. Essentially the same proposal was made almost simultaneously by Lucy (1967) and Paczyński (1967).
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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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Distances to Planetary Nebulae [PDF]
Symposium - International Astronomical Union, 1989 Finding distances to planetary nebulae remains a frustrating undertaking, but significant progress has been made over the past several years. This review covers primarily work done on distances since 1980, with some references to earlier papers. Some interesting new methods have been tried recently and some methods that have been used for years have ...
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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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37 pages, 25 figures; this is a pre-print of a chapter for the Encyclopedia of Astrophysics (edited by I. Mandel, section editor F.R.N.
De Marco, Orsola +2 more
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MILAN Sky Survey, a dataset of raw deep sky images captured during one year with a Stellina automated telescope. [PDF]
Data Brief, 2023 Parisot O +5 more
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