Results 121 to 130 of about 27,938 (255)

Confronting expansion distances of planetary nebulae with Gaia DR2 measurements

, 2019
Individual distances to planetary nebulae are of the utmost relevance for our understanding of post-asymptotic giant-branch evolution because they allow a precise determination of stellar and nebular properties.
Schönberner, D., Steffen, M.
core   +1 more source

Catalogues of Planetary Nebulae [PDF]

Symposium - International Astronomical Union, 1989
Firstly, the general requirements concerning catalogues are studied for planetary nebulae, in particular concerning the objects to be included in a catalogue of PN, their denominations, followed by reflexions about the afterlife and computerized versions of a catalogue.
openaire   +2 more sources

Gallery of Planetary Nebula Spectra

, 2006
We present the Gallery of Planetary Nebula Spectra now available at http://oit.williams.edu/nebulae The website offers high-quality, moderate resolution (~7-10 A FWHM) spectra of 128 Galactic planetary nebulae from 3600-9600 A, obtained by Kwitter, Henry,
Henry, Richard B. C., Kwitter, Karen B.
core   +3 more sources

A self-consistent stellar and 3D nebular model for Planetary Nebula IC418

, 2009
We present a coherent stellar and nebular model reproducing the observations of the Planetary Nebula IC418. We want to test whether a stellar model obtained by fitting the stellar observations is able to satisfactory ionize the nebula and reproduce the ...
Aller, Aller, Beck, Bloecker, Buerger, C. Morisset, Cristallo, Ercolano, Escalante, Ferland, Fitzpatrick, García-Segura, Gesicki, Gesicki, Gutíerrez-Moreno, Guzmán, Handler, Henry, Hillier, Hillier, Hyung, Karakas, Keenan, Krueger, L. Georgiev, Macfarlane, Marigo, Mendez, Mendez, Monteiro, Patriarchi, Pauldrach, Pottasch, Prinja, Richer, Schmutz, Schönberner, Sharpee, Sharpee, Sterling, Tayal, Tayal, Vassiliadis, Wilson   +43 more
core   +1 more source

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).
openaire   +3 more sources

The Molecular Exoskeleton of the Ring-like Planetary Nebula NGC 3132

The Astrophysical Journal
We present Submillimeter Array (SMA) mapping of ^12 CO J = 2 → 1, ^13 CO J = 2 → 1, and CN N = 2 → 1 emission from the ring-like planetary nebula NGC 3132, one of the subjects of JWST Early Release Observation near-infrared imaging.
Joel H. Kastner, David J. Wilner, Paula Moraga Baez, Jesse Bublitz, Orsola De Marco, Raghvendra Sahai, Al Wootten   +6 more
doaj   +1 more source

The Electron Temperature in the Planetary Nebula IC 418 [PDF]

, 1953
R. Minkowski
openalex   +1 more source

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 ...
openaire   +2 more sources

ON THE ROTATION OF PLANETARY NEBULA N. G. C. 6572 [PDF]

, 1916
W. W. Campbell, J. H. Moore
openalex   +1 more source

Primer on Formation and Evolution of Hydrogen-Deficient Central Stars of Planetary Nebulæ and Related Objects

Galaxies
We 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
doaj   +1 more source