scholarly journals Radio observations of new galactic bulge planetary nebulae

2001 ◽  
Vol 373 (2) ◽  
pp. 536-541 ◽  
Author(s):  
G. C. Van de Steene ◽  
G. H. Jacoby
Keyword(s):  
Planetary Nebulae ◽  
Galactic Bulge ◽  
Radio Observations

scholarly journals Simulations of a Population of Planetary Nebulae

1993 ◽  
Vol 155 ◽  
pp. 461-464
Author(s):  
G. Stasinska ◽  
R. Tylenda
Keyword(s):  
Planetary Nebulae ◽  
Selection Effects ◽  
Galactic Bulge ◽  
Radio Observations

We present a simulation of the population of Galactic bulge planetary nebulae (GBPN), which matches the diagrams obtained from VLA radio observations. This simulation may not be the only one fitting the observed data, but it helps understanding the role of observational uncertainties and selection effects in the interpretation of observational diagrams.

scholarly journals ATCA radio observations of compact planetary nabulae

2011 ◽  
Vol 7 (S283) ◽  
pp. 380-381
Author(s):  
Marcin Hajduk ◽  
Albert A. Zijlstra
Keyword(s):  
Planetary Nebulae ◽  
Interstellar Extinction ◽  
Radio Continuum ◽  
Galactic Bulge ◽  
Radio Observations ◽  
Compact Array

AbstractWe present new observations in the radio continuum of 31 planetary nebulae at 5 and 8 GHz with the Australian Telescope Compact Array. The observations are used to invesigate properties of the interstellar extinction toward Galactic Bulge.

scholarly journals Planetary nebulae in the inner Milky Way

2009 ◽  
Vol 5 (S265) ◽  
pp. 354-355
Author(s):  
Oscar Cavichia ◽  
Roberto D. D. Costa ◽  
Walter J. Maciel
Keyword(s):  
Statistical Analysis ◽  
Milky Way ◽  
Planetary Nebulae ◽  
Galactic Bulge ◽  
Intermediate Mass ◽  
Disk Interface ◽  
The Galaxy ◽  
Outer Border ◽  
Good Agreement

AbstractNew abundances of planetary nebulae located towards the bulge of the Galaxy are derived based on observations made at LNA (Brazil). We present accurate abundances of the elements He, N, S, O, Ar, and Ne for 56 PNe located towards the galactic bulge. The data shows a good agreement with other results in the literature, in the sense that the distribution of the abundances is similar to those works. From the statistical analysis performed, we can suggest a bulge-disk interface at 2.2 kpc for the intermediate mass population, marking therefore the outer border of the bulge and inner border of the disk.

The Population of Planetary Nebulae in the Galactic Bulge

1992 ◽  
pp. 492-492 ◽  
Author(s):  
G. Stasinska ◽  
A. Acker ◽  
A. Fresneau ◽  
J. F. Gameiro ◽  
J. Köppen ◽  
...  
Keyword(s):  
Planetary Nebulae ◽  
Galactic Bulge

Planetary Nebulae and the Galactic Bulge

1989 ◽  
pp. 167-167
Author(s):  
M. W. Feast ◽  
T. D. Kinman ◽  
B. S. Lasker
Keyword(s):  
Planetary Nebulae ◽  
Galactic Bulge

scholarly journals Chemical Abundances in Galactic Bulge Pn

1993 ◽  
Vol 155 ◽  
pp. 581-581 ◽  
Author(s):  
N.A. Walton ◽  
M.J. Barlow ◽  
R.E.S. Clegg
Keyword(s):  
Galactic Disk ◽  
Planetary Nebulae ◽  
Solar Neighbourhood ◽  
Galactic Bulge ◽  
Low Resolution ◽  
Chemical Abundances ◽  
The Mean ◽  
Optical Spectrophotometry ◽  
High Metallicity

We present abundance determinations, in particular of carbon, and C/O ratios, for 11 Galactic bulge planetary nebulae (PN) based on our low resolution UV data from IUE observations and optical spectrophotometry from the Anglo-Australian Telescope. We compare the observed abundances with those predicted by dredge-up theory for the high metallicity Galactic bulge. The sample abundances are also contrasted with the abundances found for PN in the Galactic disk. The mean C/O ratio for the bulge PN is significantly lower than that found for Galactic disk PN. Further, we present an abundance analysis of the very metal-poor bulge PN M2-29. From an analysis of the differential extinction found from the observed ratios of the He ii 1640,4686Å lines, we find that the ultraviolet reddening law towards the bulge is steeper than in the solar neighbourhood.

Sign in / Sign up

Export Citation Format

Share Document