Planetary nebulae
Southern planetary nebulae
... The distance moduli of the Large and Small Magellanic Clouds adopted in this work are (m - M) q = 18.7 and 19.0, respectively (Bok 1966), and the absorption is taken to be A^ = 0.2 magnitudes in front of each system ...
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Ionization Structure of Heavy Metals for Planetary Nebulae
... on planetary nebulae since these best tracks used to study the chemical evolution of the interstellar ...as planetary nebulae shown ...
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Kaschinski, Cornelius Bernhard (2013): Parameters of selected central stars of planetary nebulae from consistent optical and UV spectral analysis. Dissertation, LMU München: Fakultät für Physik
... the planetary nebula and its central star, which will evolve under constant luminosity toward higher effective ...Galaxy. Planetary nebulae nuclei are not located in a confined region of the ...the ...
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A New Radio Spectral Line Survey of Planetary Nebulae: Exploring Radiatively Driven Heating and Chemistry of Molecular Gas
... Molecular line observations provide keen insight into the envelopes of neutral gas that surround certain planetary nebulae (hereafter PNe). Thrown o↵ by low mass (0.8-8 M ) stars in their post- asymptotic ...
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The interaction of planetary nebulae and their asymptotic giant branch progenitors with the interstellar medium
... Planetary nebulae (PNe) display a wide variety of shapes ranging from round, which can be simply understood in terms of the sym- metric interacting stellar wind (ISW) model (Kwok 1982), through complex ...
14
Chromodynamical analysis of lenticular galaxies using globular clusters and planetary nebulae
... Recovering the origins of lenticular galaxies can shed light on the understanding of galaxy formation and evolution, since they present properties that can be found in both elliptical and spiral galaxies. In this work we ...
13
Automatic Derivation of Statistical Data Analysis Algorithms: Planetary Nebulae and Beyond
... Planetary nebulae are remnants of dying stars. Scientists try to understand their physics by collecting and analyzing data, for example images taken by the Hubble Space Tele- scope (HST). The analysis ...
16
Herschel Planetary Nebula Survey (HerPlaNS). First detection of OH$+ in planetary nebulae
... We present here the first detections of OH + in PNe. The emis- sion was detected in both PACS and SPIRE far-infrared spectra of three of the 11 PNe in the sample obtained in the Herschel Planetary Nebulae ...
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KINEMATIC AGES OF THE CENTRAL STARS OF PLANETARY NEBULAE
... of planetary nebulae (CSPN) is esti- mated using two methods based on their kinematic ...the nebulae at their Galactocentric distances are compared with the predicted values from the rotation curve, ...
7
A radio-continuum and photoionization-model study of the two planetary nebulae in the Sagittarius dwarf galaxy
... Zijlstra & Walsh (1996) discovered that two previously catalogued Planetary Nebulae (PNe) belonged to the newly recognized Sagittarius dwarf galaxy (Ibata et al. 1994, 1995). In the course of a radial ...
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X-ray Shaping of Planetary Nebulae
... of planetary nebulae play an essential role in planetary nebulae ...of planetary nebulae and give some hints of the promissing future of this ...
6
Dynamics of the galactic bulge using planetary nebulae
... Each page is a montage of the Ha (upper image) and the continuum (lower image) of a newly-found planetary nebula. North is up and east is at the left. Most objects are centered (or nearly centered) in the image ...
119
On expansion parallax distances for planetary nebulae
... as Planetary Nebulae (PNe) can be determined using expansion parallaxes: the angular expansion velocity in the sky is compared to the radial velocity of gas measured ...
7
Infrared photometry of southern planetary nebulae and emission-line objects
... We believe that there is no justification for the classification of AG Car and its associated ring nebula (of diameter some W) as a planetary nebula. All of the other objects plotted [r] ...
11
Third-dredge-up oxygen in planetary nebulae
... Acceptable abundances of C and O by number versus Teff of central stars according to model nebulae for He 2-436 and Wray 16-423.. Best-model values are indicated.[r] ...
5
The coordinated radio and infrared survey for high-mass star formation - IV. A new radio-selected sample of compact galactic planetary nebulae
... the number of known PNe, it is important that PNe are searched for at longer wavelengths. The CORNISH observations at 6 cm provides us with a sample of PNe that is not affected by extinction. The reliability of this ...
27
Planets, Planetary Nebulae, and Intermediate Luminosity Optical Transients (ILOTs)
... that case low mass AGB stars reach much larger radii and are much more likely to swallow planets.. 43.[r] ...
6
Cool Wolf-Rayet central stars and their planetary nebulae
... spectrum of three of the four WCIO central stars is carried out using recom bination line.. theory.[r] ...
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A Spectroscopic Study of Planetary Nebulae in the Magellanic Clouds
... A recent analysis of an ultraviolet spectrum of this object (Barlow et 0/., 1986) estimates the ratio of the total stellar flux (including emission features) to the continuum f[r] ...
183
Multiwavelength Imaging of Planetary Nebulae: Resolving & Disentangling Structure
... their structure is strongly impacted by interacting stellar winds (ISW). From the assumption of isotropic winds in these models, we expect PNe to be spherical, but in actuality, spherical nebulae are the exception ...
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