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Astronomische Nachrichten nos 2958-2963
No full textR. R. Astronomische Nachrichten nos 2958-2963. In: Bulletin astronomique, tome 7, 1890. pp. 178-184
The nature of the HE0450-2958 system
Full text linkMagain et al. argued that the host galaxy of the quasar in HE0450−2958 is substantially underluminous given the quasar brightness. Using kinematical information from the spectra of the quasar and the companion galaxy, an ultraluminous infrared galaxy, we test the hypothesis that the black hole powering the quasarwas ejected from the companion galaxy during a merger. We argue that the ejection model is unlikely, since the kick velocity required to remove the black hole from the galaxy is > ~ 500 km s-ˡ, inconsistent with the presence of narrow emission-line gas at the same redshift as the quasar nucleus.We also show that the quasar in HE0450−2958 has the spectral characteristics of a narrow-line Seyfert 1 galaxy and calculate a mass for its black hole that is roughly an order of magnitude smaller than that estimated by Magain et al. The predicted luminosity of the host galaxy is then consistent with the upper limits inferred by those authors
Journal of Astronomy and Earth Sciences (ISSN: 2958-4043)
No full textAll rights reserved. This is the storage of formally published articles from 2022 to 2024 in Journal of Astronomy and Earth Sciences (ISSN: 2958-4043)
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Bath County, Kentucky - Letters (SC 2958)
Full text linkFinding aid only for Manuscripts Small Collection 2958. Correspondence of two related Bath County, Kentucky families. A lonesome Sarah L. Boyd writes to her mother, Elizabeth A. “Lizzie” Rogers, from boarding school in Fleming County, Kentucky in 1865, where she discusses having her photograph taken, “hateful” schoolmates, and provisions from her family of clothing, whiskey and bitters. In the 1880s, Ida Lee Bell receives letters from cousins, friends and suitors with family news and local gossip. One of her letters voices disapproval of young men who drink when calling on ladies. The letters mention many family members by first name
Slit and integral-field optical spectroscopy of the enigmatic quasar HE 0450-2958
No full textContext. Interest in the quasar HE 0450-2958 arose following the publication of the non-detection of its expected massive host, leading to various interpretations.LASTR
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