Zobrazeno 1 - 10
of 558
pro vyhledávání: '"R. B. C."'
Autor:
C. B. C. S. Alvarenga, O. M. Heiderick, T. A. Couto, P. R. Cetlin, R. B. C. Sales, M. T. P. Aguilar
Publikováno v:
Materiales de Construccion, Vol 69, Iss 335, Pp e192-e192 (2019)
Numerous studies have investigated the use of waste glass as a partial substitution in Portland cement. Nonetheless, it seems there is no consensus about the influence of particle size and color on the behavior of the compounds. This work investigate
Externí odkaz:
https://doaj.org/article/115619bd8e9b459f8705f76fefe29099
Autor:
Kwitter, Karen B., Henry, R. B. C.
Publikováno v:
PASP, 134, Number 022001, 2022
In this review/tutorial we explore planetary nebulae as a stage in the evolution of low-to-intermediate-mass stars, as major contributors to the mass and chemical enrichment of the interstellar medium, and as astrophysical laboratories. We discuss ma
Externí odkaz:
http://arxiv.org/abs/2110.13993
Autor:
Kwitter, Karen B., Henry, R. B. C.
Publikováno v:
Publications of the Astronomical Society of the Pacific, 2022 Feb 01. 134(1032), 1-61.
Externí odkaz:
https://www.jstor.org/stable/27303065
The primary goal of this paper is to make a direct comparison between the measured and model-predicted abundances of He, C and N in a sample of 35 well-observed Galactic planetary nebulae (PN). All observations, data reductions, and abundance determi
Externí odkaz:
http://arxiv.org/abs/1708.08910
Akademický článek
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Akademický článek
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Autor:
Henry, R. B. C., Balick, B., Dufour, R. J., Kwitter, K. B., Shaw, R. A., Miller, T. R., Buell, J. F., Corradi, R. L. M.
The goal of the present study is twofold. First, we employ new HST/STIS spectra and photoionization modeling techniques to determine the progenitor masses of eight planetary nebulae (IC 2165, IC 3568, NGC 2440, NGC 3242, NGC 5315, NGC 5882, NGC 7662
Externí odkaz:
http://arxiv.org/abs/1510.01342
We present spectroscopy of nine planetary nebulae (PNe) in the outskirts of M31, all but one obtained with the 10.4m GTC telescope. These sources extend our previous study of the oxygen abundance gradient of M31 to galactocentric radii as large as 10
Externí odkaz:
http://arxiv.org/abs/1504.03869
Autor:
Kwitter, K. B., Méndez, R. H., Peña, M., Stanghellini, L., Corradi, R. L. M., DeMarco, O., Fang, X., Henry, R. B. C., Karakas, A. I., Liu, X. -W., López, J. A., Manchado, A., Parker, Q. A.
We present a summary of current research on planetary nebulae and their central stars, and related subjects such as atomic processes in ionized nebulae, AGB and post-AGB evolution. Future advances are discussed that will be essential to substantial i
Externí odkaz:
http://arxiv.org/abs/1403.2246