Zobrazeno 1 - 10
of 168
pro vyhledávání: '"Gruenwald R"'
Publikováno v:
Astrophys.J.653:1098-1114,2006
Mid-resolution spectra are used to deduce the size and kinematics of the coronal gas in a sample of Seyfert galaxies by means of observations of the [FeXI], [FeX], [FeVII], [SiVI] and [SiVII] lines. These coronal lines (CL) extend from the unresolved
Externí odkaz:
http://arxiv.org/abs/astro-ph/0609635
Publikováno v:
Mon.Not.Roy.Astron.Soc.364:674-682,2005
When analysing HII regions, a possible source of systematic error on empirically derived physical quantities is the limited size of the slit used for the observations. A grid of photoionization models was built through the Aangaba code varying the io
Externí odkaz:
http://arxiv.org/abs/astro-ph/0509345
Autor:
Aleman, I., Gruenwald, R.
Publikováno v:
Astrophys.J. 607 (2004) 865-872
This paper presents an analysis of the concentration of the hydrogen molecule inside the ionized region of planetary nebulae. The equations corresponding to the ionization and chemical equilibria of H, H+, H-, H2, H2+, and H3+ are coupled with the eq
Externí odkaz:
http://arxiv.org/abs/astro-ph/0403189
Autor:
Gruenwald, R., Viegas, S. M.
The effect of the nebula optical depth on the determination of the temperature (T*) of the central stars in planetary nebulae is discussed. Based on photoionization models for planetary nebulae with different optical depths, we show, quantitatively,
Externí odkaz:
http://arxiv.org/abs/astro-ph/0010156
We use a 3D photoionization modeling tool to study the morpho-kinematic properties of the Planetary Nebula (PN) NGC 3132. We show that it is possible to reproduce the low resolution observations (spectra and images) with an ellipsoidal shell. However
Externí odkaz:
http://arxiv.org/abs/astro-ph/0002154
We present a new modeling tool for planetary nebulae, based on 3D photoionization calculations. Our goal is to show that all the information provided by observations, regarding kinematics and morphology, have to be consistently accounted for, in orde
Externí odkaz:
http://arxiv.org/abs/astro-ph/9912157
We present a new modeling tool for planetary nebulae (PNe), based on 3D photoionization calculations. From models for two theoretical PNe, we show that the enhancement in the equatorial zone observed in several PNe is not necessarily due to a density
Externí odkaz:
http://arxiv.org/abs/astro-ph/9909468
Helium and hydrogen recombination lines observed in low-metallicity, extragalactic H II regions provide the data used to infer the primordial helium mass fraction, Y_P. The ionization corrections for unseen neutral helium (or hydrogen) are usually as
Externí odkaz:
http://arxiv.org/abs/astro-ph/9909213
Autor:
Schaffrin-Nabe, D., Josten-Nabe, A., Schuster, S., Reismann, D., Melchior, F., Patil, D.S., Schaffrin, M., Grünwald, R., Voigtmann, R.
Publikováno v:
In Annals of Oncology October 2023 34 Supplement 2:S724-S724
Akademický článek
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