scholarly journals An Optical Emission Line Survey of Large Planetary Nebulae

2006 ◽  
Vol 2 (S234) ◽  
pp. 455 ◽  
Author(s):  
G. J. Madsen ◽  
D. J. Frew ◽  
Q. A. Parker ◽  
R. J. Reynolds ◽  
L. M. Haffner
Keyword(s):  
Emission Line ◽  
Planetary Nebulae ◽  
Optical Emission ◽  
Line Survey

scholarly journals A Multiwavelength Optical Emission Line Survey of Warm Ionized Gas in the Galaxy

2006 ◽  
Vol 652 (1) ◽  
pp. 401-425 ◽  
Author(s):  
G. J. Madsen ◽  
R. J. Reynolds ◽  
L. M. Haffner
Keyword(s):  
Emission Line ◽  
Optical Emission ◽  
Ionized Gas ◽  
The Galaxy ◽  
Line Survey

scholarly journals A Digital Emission-Line Survey of the Small Magellanic Cloud

1999 ◽  
Vol 190 ◽  
pp. 97-98
Author(s):  
P. Frank Winkler ◽  
Yasser Rathore ◽  
R. Chris Smith
Keyword(s):  
Emission Line ◽  
Supernova Remnants ◽  
Planetary Nebulae ◽  
Magellanic Cloud ◽  
H Ii Regions ◽  
Small Magellanic Cloud ◽  
Rich Variety ◽  
Line Survey ◽  
The Rich ◽  
Mosaic Images

We present results on the SMC from the first full season of the Michigan/CTIO Magellanic Cloud Emission-Line Survey, being carried out from CTIO. Images are being obtained in Hα, [S II] λλ 6717, 6731, and [O III] λ 5007, plus red and green continuum bands for star subtraction. Data from the 1996–97 season have been assembled into large mosaic images which reveal the rich variety of nebulosity in the SMC in unprecedented detail. These are providing definitive samples of the active, occasionally violent, ISM on scales including superbubbles, wind-blown bubbles, supernova remnants, H II regions, and planetary nebulae.

scholarly journals Serendipitous Discovery of an Optical Emission-line Jet in NGC 232

2017 ◽  
Vol 850 (1) ◽  
pp. L17 ◽  
Author(s):  
C. López-Cobá ◽  
S. F. Sánchez ◽  
I. Cruz-González ◽  
L. Binette ◽  
L. Galbany ◽  
...  
Keyword(s):  
Emission Line ◽  
Optical Emission

scholarly journals Hybrid 3-D Spectrophotometry of Emission-Line Nebulae at Ohio State

1995 ◽  
Vol 149 ◽  
pp. 167-171
Author(s):  
Richard W. Pogge ◽  
Nancy Joanne Lame
Keyword(s):  
Emission Line ◽  
Planetary Nebulae ◽  
Hii Regions ◽  
Ohio State University ◽  
State University ◽  
Considerable Success ◽  
Fabry Perot ◽  
The Ohio State University ◽  
Scientific Results ◽  
Narrowband Filter

AbstractA program of 3-D spectrophotometry of emission nebulae being carried out at the Ohio State University will be described. We have had considerable success combining Fabry-Perot imaging, long-slit spectroscopy, and narrowband filter imaging into a hybrid 3-D spectroscopic approach that we have used to obtain detailed spectrophotometric maps of the density, temperature, extinction, and ionization in HII regions and Planetary Nebulae. The centerpiece instrument of this effort, the OSU Imaging Fabry-Perot Spectrograph (IFPS), will be described, and scientific results illustrative of our work will be presented.

scholarly journals Optical emission line nebulae in galaxy cluster cores 1: the morphological, kinematic and spectral properties of the sample

2016 ◽  
Vol 460 (2) ◽  
pp. 1758-1789 ◽  
Author(s):  
S. L. Hamer ◽  
A. C. Edge ◽  
A. M. Swinbank ◽  
R. J. Wilman ◽  
F. Combes ◽  
...  
Keyword(s):  
Emission Line ◽  
Spectral Properties ◽  
Galaxy Cluster ◽  
Optical Emission ◽  
Cluster Cores

scholarly journals A Comparison of Rest-frame Ultraviolet and Optical Emission-line Diagnostics in the Lensed Galaxy SDSS J1723+3411 at Redshift z = 1.3293

2021 ◽  
Vol 908 (2) ◽  
pp. 154
Author(s):  
J. R. Rigby ◽  
Michael Florian ◽  
A. Acharyya ◽  
Matthew Bayliss ◽  
Michael D. Gladders ◽  
...  
Keyword(s):  
Emission Line ◽  
Rest Frame ◽  
Optical Emission

scholarly journals Kband SINFONI spectra of twoz~ 5 submillimeter galaxy systems: upper limits to the unobscured star formation from [O II] optical emission line searches

2016 ◽  
Vol 594 ◽  
pp. A74 ◽  
Author(s):  
Guilherme S. Couto ◽  
Luis Colina ◽  
Javier Piqueras López ◽  
Thaisa Storchi-Bergmann ◽  
Santiago Arribas
Keyword(s):  
Star Formation ◽  
Emission Line ◽  
Optical Emission ◽  
Line Searches ◽  
Upper Limits

Is there a Relation between Optical Emission Line Strengths and Continuum Shapes?

1989 ◽  
pp. 187-188
Author(s):  
Belinda J. Wilkes ◽  
Martin Elvis ◽  
Jonathan McDowell
Keyword(s):  
Emission Line ◽  
Optical Emission ◽  
Line Strengths

scholarly journals The Ionization of Planetary Nebulae

1968 ◽  
Vol 34 ◽  
pp. 190-204 ◽  
Author(s):  
Robert E. Williams
Keyword(s):  
Ionizing Radiation ◽  
Emission Line ◽  
Radiation Field ◽  
Planetary Nebulae ◽  
Model Atmosphere ◽  
Evolutionary Sequence ◽  
Lyman Continuum ◽  
The Mean ◽  
Central Stars

The ionization of the most abundant elements in planetary nebulae has been determined for a number of models of nebulae at different epochs in their expansion. The values used for the temperatures and radii of the central stars and the sizes and densities of the shells have come from Seaton's evolutionary sequence. The ionizing radiation field has been taken from model atmosphere calculations of the central stars by Gebbie and Seaton, and Böhm and Deinzer. Emission-line fluxes have been calculated for the models and compared with observations of planetary nebulae by O'Dell, Osterbrock's group, and Aller and his collaborators. Results indicate that the central stars have strong He+ Lyman continuum excesses, similar to those predicted by Gebbie and Seaton. The mean abundance determinations for the nebulae made by Aller are confirmed, with the exception of nitrogen, which appears to be 3 or 4 times more abundant than his value. It is also seen that the electron temperatures of the nebulae are higher than previous theoretical determinations, providing better agreement with empirically derived values.

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