993 resultados para Nova Parnamirim
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http://www.archive.org/details/cannibalmission00pattuoft
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Reproduction of copy held by Special Collections, Bridewell Library, Perkins School of Theology, Southern Methodist University. Includes both DjVu and PDF files for download. Mode of access: World Wide Web.
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Se describe una especie nueva de Salvia, S. herbanica Santos & Fernández spec. nova, de la isla de Fuerteventura (I. Canarias). Muestra relaciones con el grupo de especies saharo-síndicas: S. aegyptiaca L., S. chudaei Battand. & Trab. y S. deserti Dcne.
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Se describe un nuevo taxon para la flora ibérica.
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Se describe una nueva especie de Lecanora Ach. (L. rhizinata Poetl., Barreno & Rico) de la alta montaña del Centro de España, que se desarrolla sobre rocas metamórficas fácilmente exfoliables. La especie puede encuadrarse dentro de la subsección Concolores Poelt (sect. Petrasterion Poelt, subgen. Placodium (Pers.) Poelt) del género Lecanora. Sin embargo, la compleja estructura anatómica del talo, en la que se diferencian fascículos de hifas fuertemente conglutinadas, que partiendo del córtex penetran hacia la médula llegando, en ocasiones, hasta el límite inferior de la escuámula e intercalándose con la capa gonidial a la que disgregan en glomérulos, unido a la presencia de cordones rizinales («Rhizinenstränge»), hacen que la nueva especie tenga una posición aislada dentro del grupo Concolores y pudiera reclamar un estatus distinto. Asimismo se hace una comparación con otras especies de la citada subsect. Concolores y con otros géneros de Lecanoraceae.
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Se realiza una descripción detallada del nuevo liquen Coelocaulon crespoae, epifito de brezos, jaras y pinos en la Península Ibérica, se incluye mapa de distribución e ilustraciones de la anatomía y morfología. Asimismo se ha confeccionado una tabla sintética que pone de manifiesto sus relaciones con otras especies de Cornicularia s. ampl. Se comentan otros táxones que tienen eí mismo hábitat: Protoblastenia russula (Ach.) Räsänen, Ochrolechia anomala (Harm.) Verseghy y Buellia griseovirens (Turner et Borrer) Almb. cuya presencia en España tiene marcado interés taxonómico y corológico.
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Se describe un nuevo taxon para Portugal: Serratula baetica Boiss. subsp. lusitanica Cantó, subsp. nova.
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A new epiphytic lichen species of dxc genus Rinodina is described. Rinodina mayrhoferi Crespo has bicincta-type spores (POELT & MAYRUOFER, 1979), and grows usually on Juniperus ¡hurifera (lera L., always in continental localities of the Iberian Peninsula.
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Nova V458 Vul erupted on 2007 August 8 and reached a visual magnitude of 8.1 a few days later. Ha images obtained 6 weeks before the outburst as part of the IPHAS Galactic plane survey reveal an 18th magnitude progenitor surrounded by an extended nebula. Subsequent images and spectroscopy of the nebula reveal an inner nebular knot increasing rapidly in brightness due to flash ionization by the nova event. We derive a distance of 13 kpc based on light travel time considerations, which is supported by two other distance estimation methods. The nebula has an ionized mass of 0.2 Msolar and a low expansion velocity: this rules it out as ejecta from a previous nova eruption, and is consistent with it being a ~14,000 year old planetary nebula, probably the product of a prior common envelope (CE) phase of evolution of the binary system. The large derived distance means that the mass of the erupting WD component of the binary is high. We identify two possible evolutionary scenarios, in at least one of which the system is massive enough to produce a Type Ia supernova upon merging.
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The POINT-AGAPE (Pixel-lensing Observations with the Isaac Newton Telescope-Andromeda Galaxy Amplified Pixels Experiment) survey is an optical search for gravitational microlensing events towards the Andromeda galaxy (M31). As well as microlensing, the survey is sensitive to many different classes of variable stars and transients. In our first paper of this series, we reported the detection of 20 classical novae (CNe) observed in Sloan r' and i' passbands.
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The POINT-AGAPE (Pixel-lensing Observations with the Isaac Newton Telescope-Andromeda Galaxy Amplified Pixels Experiment) survey is an optical search for gravitational microlensing events towards the Andromeda galaxy (M31). As well as microlensing, the survey is sensitive to many different classes of variable stars and transients. Here we describe the automated detection and selection pipeline used to identify M31 classical novae (CNe) and we present the resulting catalogue of 20 CN candidates observed over three seasons. CNe are observed both in the bulge region as well as over a wide area of the M31 disc. Nine of the CNe are caught during the final rise phase and all are well sampled in at least two colours. The excellent light-curve coverage has allowed us to detect and classify CNe over a wide range of speed class, from very fast to very slow. Among the light curves is a moderately fast CN exhibiting entry into a deep transition minimum, followed by its final decline. We have also observed in detail a very slow CN which faded by only 0.01 mag d(-1) over a 150-d period. We detect other interesting variable objects, including one of the longest period and most luminous Mira variables. The CN catalogue constitutes a uniquely well-sampled and objectively-selected data set with which to study the statistical properties of CNe in M31, such as the global nova rate, the reliability of novae as standard-candle distance indicators and the dependence of the nova population on stellar environment. The findings of this statistical study will be reported in a follow-up paper.
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The UV spectra of nova-like variables are dominated by emission from the accretion disk, modified by scattering in a wind emanating from the disk. Here, we model the spectra of RW Tri and UX UMa, the only two eclipsing nova-like variables which have been observed with the Hubble Space Telescope in the far-ultraviolet, in an attempt to constrain the geometry and the ionization structure of their winds. Using our Monte Carlo radiative transfer code, we computed spectra for simply parameterized axisymmetric biconical outflow models and were able to find plausible models for both systems. These reproduce the primary UV resonance lines-N v, Si iv, and C iv-in the observed spectra in and out of eclipse. The distribution of these ions in the wind models is similar in both cases as is the extent of the primary scattering regions in which these lines are formed. The inferred mass-loss rates are 6%-8% of the mass accretion rates for the systems. We discuss the implication of our point models for our understanding of accretion disk winds in cataclysmic variables. © 2010. The American Astronomical Society. All rights reserved.