Radio loud far-infrared galaxies

The first results are presented of a multiwavelength study of Infrared Astronomy Satellite (IRAS) galaxies with excess radio emission. The sample was selected by cross correlating the IRAS Faint Source Survey, and the Point Source Catalogue with the Texas radio survey. Recent optical (imaging and spectroscopic) and radio (VLA) observations are discussed. These observations will be used to investigate possible connections between radio galaxy activity, star formation and galaxy interactions

The gift of assurance: the presbyter in modern Roman Catholic theology

From a conversation between selected authors and documents from the Roman Catholic Magisterium, this thesis suggests that the presbyter is one who is given by God to be an assurance of faith to the church.In the first part of the thesis, under the headings of 'Assurance', 'Authenticity' and 'Authority', the author reflects on the image of the ordained priest as leader of the community and considers the questions raised in the recent debate as to the identity of the ordained as acting in the person of Christ and in the person of the church. Also considered is the identity of the ordained as emerging from the teaching of the Roman Catholic Church especially in relation to the document 'Pastores Dabo Vobis' of John Paul II. The definition of the office of presbyter as distinct from that of bishop is also explored in relationship to the parish and the local bishop. In the second part of the thesis, under the title of 'Gift and Return', the author examines some recent theology which underlines the sacraments as encounters between God and humanity, and show how they are participations in the life of God. Recent theological work concerning the postmodern challenge to an understanding of how God and the human are mutually present to one another is also reviewed. The third and final part of the thesis draws the first two parts together, with reference to assurance, authenticity, and authority but this time in connection with the three offices of priest, prophet, and pastor.The conclusion of this thesis is that the presbyter's identity is founded in his being the gift of assurance in the realm of the ordinary. This is a preferred model to other images used to describe the presbyter, such as shepherd and steward

Some studies of oak leaf blister (Taphrina caerulescens)

Dissertation (Ph.D.)--University of Kansas, Botany, 1952

Consequences of Dust in Metal-Rich HII Regions

Dust and associated depletion of heavy elements from the gas phase can modify the thermal properties of HII regions from the dust-free case, with significant consequences for the emergent optical spectrum. We present the results of theoretical calculations illustrating the effects of grains on the spectra of giant, extragalactic HII regions, with emphasis on high metallicity systems (i.e. solar and higher Z). Dust provides a simple explanation for the observational absence of pure Balmer-line spectra that are expected on theoretical grounds for dust-free, chemically enriched nebulae. Grains may also play a role in enhancements of forbidden-line emission observed in HII regions in the enriched nuclei of normal galaxies. In most cases, depletion introduces the strongest perturbations to the optical spectrum. Selective absorption of the ionizing continuum as well as heating by grain photoelectrons are important in some instances, however, and grain heating can be particularly important for enhancing emission in high-ionization lines. Allowing for depletion, the presence of dust is unlikely to introduce large errors in global metallicity indicators, although uncertainties in depletion factors coupled with the sensitivity of infrared cooling to electron density will make accurate calibrations difficult at high Z. The present calculations establish further that previous relative abundance analyses that fail to take into account dust effects in a self-consistent way (grain heating as well as depletion) may overestimate temperature gradients in high-Z nebulae, resulting in errors in relative abundances for different elements.Comment: 21 pages (AASTeX), plus 9 figures (uuencoded, gzipped, tar), to appear in ApJ, December 199