Results 181 to 190 of about 245,593 (320)

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

Planetary Nebulae

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, Aleman, Isabel, Akras, Stavros   +2 more
openaire   +2 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

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

, 1953
R. Minkowski
openalex   +1 more source

Dust in planetary nebulae [PDF]

Proceedings of the International Astronomical Union, 2016
AbstractInfrared spectra from the Spitzer Space Telescope trace the evolution of carbon-rich dust from the asymptotic giant branch (AGB) to young planetary nebulae (PNe). On the AGB, amorphous carbon dominates the dust, but SiC and MgS also appear. In more evolved systems with warmer central stars, the spectra reveal the unidentified 21 μm feature ...
openaire   +2 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

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, Hitzelberger P, Bruneau P, Krebs G, Destruel C, Vandame B.   +5 more
europepmc   +1 more source

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

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

Nuclei of Planetary Nebulae [PDF]

Symposium - International Astronomical Union, 1973
In 1969 Aller and I collected information about the spectra of emission-line nuclei of planetary nebulae. (See also Aller, 1967, for classification of both emission and absorption spectra.) We classified them and compared them to the spectra of Population I stars. Our idea was to follow this general classification by detailed observation and comparison
openaire   +2 more sources

A Model for the Dynamical and Ionization Structure of Planetary Nebula IC 418

Iranian Journal of Physics Research, 1997
The interacting two winds model and a spherical density distribution function are introduced to study the dynamical and ionization structure of the planetary nebula IC 418.
J. Ghanbari, A. Khesali
doaj