منابع مشابه
The Great Commission and the New Testament : An Exegesis of Matthew 28 : 16 - 20 Hal Freeman
Introduction The seal of the Baptist university where I teach has the Greek text of a portion of Matthew 28:19, which translates into English as, “Make disciples of all nations.” The founders of the school, like many of our spiritual ancestors, wanted to emphasize that this commission is essential to the Christian faith. The importance many believers attach to this passage is consistent with th...
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Planetary nebulae (PNe) can be used to trace intermediate and old stellar populations in galaxies and the intracluster medium out to approximately 20 Mpc. PNe can be easily identified with narrow-band surveys, and their chemical abundances and radial velocities can be measured with multi-slit or multi-fiber spectrographs. We briefly review what has been accomplished to date, and include tables ...
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Magnetic fields are an important but largely unknown ingredient of planetary nebulae. They have been detected in oxygen-rich AGB and post-AGB stars, and may play a role in the shaping of their nebulae. Here we present SCUBA sub-millimeter polarimetric observations of four bipolar planetary nebulae and post-AGB stars, including two oxygen-rich and two carbon-rich nebulae, to determine the geomet...
متن کاملComparing Symbiotic Nebulae and Planetary Nebulae Luminosity Functions
We compare the observed symbiotic nebulae (SyN) luminosity function (SyNLF) in the [O III] λ5007 Å line to the planetary nebulae (PN) luminosity function (PNLF) and find that the intrinsic SyNLF (ISyNLF) of galactic SyNs has very similar cutoff luminosity and general shape to those of the PNLF. The [O III]/(Hα+[N II]) line ratios of SyNs and PNs are shown to be also related. Possible implicatio...
متن کاملIntracluster Planetary Nebulae
We review the progress of research on intracluster planetary nebulae (IPN). In the past five years, hundreds of IPN candidates have been detected in the Virgo and Fornax galaxy clusters and searches are also underway in poorer galaxy groups. From the observations to date, and applying the known properties of extragalactic planetary nebulae, the intracluster light in Virgo and Fornax: 1) is sign...
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ژورنال
عنوان ژورنال: Transactions of the International Astronomical Union
سال: 1936
ISSN: 0251-107X
DOI: 10.1017/s0251107x00017648