30 research outputs found

    Recopilación de la información biogeográfica, análisis de patrones ecológicos, conservación y mapa potencial de Graellsia isabelae (Graells, 1849) (Lepidoptera, Saturniidae) en la provincia de Cuenca, España

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    In the present paper, we update the distributional information of the endangered moth Graellsia isabelae (Graells, 1849) in Cuenca (Castilla-La Mancha) and provide relevant ecological information. The species is present in 14 localities corresponding to 14 10x10 km UTM squares; 8 of them are published for the first time in this study. We corroborate the presence of the species in all the Protected Areas in Cuenca. Using the known occurrence data and a set of digital environmental variables such as current vegetation, climate, geology and elevation, we found that the distribution of the species seems to be mainly determined by the presence of Scots pine (P. sylvestris) and Austrian pine (Pinus nigra subsp. salzmanii) forests. Finally, a potential distribution map for the moth in Cuenca suggests that the species could inhabit other areas where it is presently unknown.Se ha realizado un estudio sobre la mariposa nocturna Graellsia isabelae (Graells, 1849) en la provincia de Cuenca, la cual se encuentra protegida en la región de Castilla-La Mancha. Se ha elaborado un mapa de distribución biogeográfica, ampliándose su presencia en un total de 8 cuadrículas UTM de 10x10 km. Además, se ha analizado la distribución de la especie con respecto a los espacios naturales protegidos de la provincia observando que está presente en la mayoría de los mismos. Así mismo, se ha realizado un cruce de datos de distribución en cuadrículas UTM 1x1 km con diferentes capas de sistemas de información geográfica (mapa forestal español, modelo digital del terreno, geología y caracterización climática de Allué-Andrade), obteniendo preferencias de patrones ecológicos, tales como la vegetación actual, caracterización climática, geología y distribución altitudinal. El hábitat principal de G. isabelae son zonas ocupadas por pino laricio (Pinus nigra subsp. salzmanii) y pino albar (P. sylvestris). Por último, se ha realizado un mapa de distribución potencial según la vegetación, la caracterización climática y la altitud, observándose que la distribución de G. isabelae en la provincia de Cuenca puede ser considerablemente mayor que la conocida hasta la fecha

    Hot high-mass accretion disk candidates

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    To better understand the physical properties of accretion disks in high-mass star formation, we present a study of a 12 high-mass accretion disk candidates observed at high spatial resolution with the Australia Telescope Compact Array (ATCA) in the NH3 (4,4) and (5,5) lines. Almost all sources were detected in NH3, directly associated with CH3OH Class II maser emission. From the remaining eleven sources, six show clear signatures of rotation and/or infall motions. These signatures vary from velocity gradients perpendicular to the outflows, to infall signatures in absorption against ultracompact HII regions, to more spherical infall signatures in emission. Although our spatial resolution is ~1000AU, we do not find clear Keplerian signatures in any of the sources. Furthermore, we also do not find flattened structures. In contrast to this, in several of the sources with rotational signatures, the spatial structure is approximately spherical with sizes exceeding 10^4 AU, showing considerable clumpy sub-structure at even smaller scales. This implies that on average typical Keplerian accretion disks -- if they exist as expected -- should be confined to regions usually smaller than 1000AU. It is likely that these disks are fed by the larger-scale rotating envelope structure we observe here. Furthermore, we do detect 1.25cm continuum emission in most fields of view.Comment: 21 pages, 32 figures, accepted for ApJS. A high-resolution version can be found at http://www.mpia.de/homes/beuther/papers.htm

    On the nature of outflows in intermediate-mass protostars: a case study of IRAS 20050+2720

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    Context. This is the third of a series of papers devoted to study in detail and with high-angular resolution intermediate-mass molecular outflows and their powering sources. Aims. The aim of this paper is to study the intermediate-mass YSO IRAS 20050+2720 and its molecular outflow, and put the results of this and the previous studied sources in the context of intermediate-mass star formation. Methods. We carried out VLA observations of the 7 mm continuum emission, and OVRO observations of the 2.7 mm continuum emission, CO(1-0), C18O(1-0), and HC3N(12-11) to map the core towards IRAS 20050+2720. The high-angular resolution of the observations allowed us to derive the properties of the dust emission, the molecular outflow, and the dense protostellar envelope. By adding this source to the sample of intermediate-mass protostars with outflows, we compare their properties and evolution with those of lower mass counterparts. Results. The 2.7mm continuum emission has been resolved into three sources, labeled OVRO 1, OVRO 2, and OVRO 3. Two of them, OVRO 1 and OVRO 2, have also been detected at 7 mm. OVRO 3, which is located close to the C18O emission peak, could be associated with IRAS 20050+2720. The mass of the sources, estimated from the dust continuum emission, is 6.5 Msun for OVRO 1, 1.8 Msun for OVRO 2, and 1.3 Msun for OVRO 3. The CO(1-0) emission traces two bipolar outflows within the OVRO field of view, a roughly east-west bipolar outflow, labeled A, driven by the intermediate-mass source OVRO 1, and a northeast-southwest bipolar outflow, labeled B, probably powered by a YSO engulfed in the circumstellar envelope surrounding OVRO 1.Comment: 13 pages, 8 figures, 5 tables. Accepted for publication by A&

    YSO jets in the Galactic Plane from UWISH2: V - Jets and Outflows in M17

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    Jets and outflows are the first signposts of stellar birth. Emission in the H2 1–0?S(1) line at 2.122-??m is a powerful tracer of shock excitation in these objects. Here we present the analysis of 2.0?×?0.8?deg2 data from the UK Wide-field Infrared Survey for H2 (UWISH2) in the ?1–0?S(1) line to identify and characterize the outflows of the M17 complex. We uncover 48 probable outflows, of which 93?per cent are new discoveries. We identified driving source candidates for 60?per cent of outflows. Among the driving source candidate young stellar objects (YSOs), 90?per cent are protostars and the remaining 10 per cent are Class?II YSOs. In comparison with results from other surveys, we suggest that H2 emission fades very quickly as the objects evolve from protostars to pre-main-sequence stars. We fit spectral energy distribution (SED) models to 14 candidate outflow-driving sources and conclude that the outflows of our sample are mostly driven by moderate-mass YSOs that are still actively accreting from their protoplanetary disc. We examined the spatial distribution of the outflows with the gas and dust distribution of the complex and observed that the filamentary dark cloud M17SWex, located on the south-western side of the complex, is associated with a greater number of outflows. We find that our results corroborate previous suggestions that, in the M17 complex, M17SWex is the most active site of star formation. Several of our newly identified outflow candidates are excellent targets for follow-up studies to understand better the very early phase of protostellar evolution

    Sin / Sense

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    Sexto desafío por la erradicación de la violencia contra las mujeres del Institut Universitari d’Estudis Feministes i de Gènere «Purificación Escribano» de la Universitat Jaume

    Land management impacts on European butterflies of conservation concern: a review

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    Dinâmica da distribuição diamétrica de bracatingais na região metropolitana de Curitiba Dinamic of the diameter distribuition of Mimosa Scabrella Benth stands in the metropolitam region of Curitiba

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    O objetivo desta pesquisa foi estudar a dinâmica da distribuição diamétrica com relação à idade, em povoamentos nativos de bracatinga (Mimosa scabrella Benth.) localizados nos municípios da região metropolitana de Curitiba. Os dados utilizados provieram de um experimento de densidades iniciais, delineado em blocos ao acaso, constituído de cinco blocos e quatro tratamentos, perfazendo um total de 20 parcelas de 325 m², as quais foram remedidas às idades aproximadas de 4, 5, 6 e 7,5 anos. A densidade inicial sofreu redução para 2.000, 4.000 e 8.000 árvores por hectare quando o povoamento tinha 1 ano de idade. Deixou-se também uma parcela-testemunha em cada bloco, as quais não sofreram nenhum raleamento e tinham em média 25.000 árvores por hectare. Desses cinco blocos, um estava localizado na classe de sítio I, 2 na classe de sítio II e 2 blocos na classe de sítio III. Paralelamente, foram medidos os diâmetros e as alturas de todas as árvores em 124 parcelas temporárias distribuídas nos vários municípios da região metropolitana de Curitiba, representativos de povoamentos de bracatinga sob regime tradicional de cultivo e manejo, cobrindo idades de 3 a 18 anos, e as três classes de sítio. Dentre as funções de densidade de probabilidade testadas por Bartoszeck (2000), a S B de Johnson foi a de melhor desempenho, sendo, portanto, utilizada para a estimativa do número de árvores por classe diamétrica e por hectare e conseqüente construção das curvas de distribuição diamétrica para as inúmeras combinações de idade, sítio e densidades disponíveis. Através da observação visual das curvas sobrepostas, evidenciou-se que essas apresentaram assimetria para a direita e achatamento (curtose), com o aumento da idade. As curvas foram, então, comparadas analiticamente entre si, pelo teste qui-quadrado, o qual revelou a existência de diferenças significativas entre as curvas de distribuição diamétrica em diferentes idades.<br>The objective of this research was to study the behavior and dynamic of diameter distribution curves with respect to age, in native stands of bracatinga (Mimosa scabrella Benth) located in the metropolitan region of Curitiba, State of Parana, Brazil. The data came from a trial of densities, arranged in randomized blocks, with 5 blocks and 4 treatments, in a total of 20 plots (325 m²) remeasured at the approximate ages of 4, 5, 6 and 7.5 years. The initial density was reduced to 2000, 4000, 8000 trees per hectare when the stands were 1 year old. The control plots in every block, without any treatment , had in average,25000 trees per hectare at 1 year old. From these 5 blocks, 1 was located on site class I; 2 on site class II and 2 on site class III. Diameters and heights were also measured in 124 temporary sample plots scatered throughout several counties of the metropolitan region of Curitiba, representative of bracatinga stands under traditional cultivation and management with ages ranging from 3 to 18 years, and the 3 site classes. Among the tested distribuition functions by Bartoszeck (2000), the S B from Johnson was the one with the best performance, being used to estimate the number of trees per diameter class per hectare, and for constructing the diameter distribuition curves for the several possible combinations of age, site and initial density. The evolution of the distribution curves along the ages presented positive skewness and a flat distribution (Kurtosis) with the increasing age. These curves (estimated values) were compared by the chi-square test that indicated significant differences among diameter distribuition curves at different ages

    Biomarkers Associating with PARP Inhibitor Benefit in Prostate Cancer in the TOPARP-B Trial.

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    PARP inhibitors are approved for treating advanced prostate cancers (APCs) with various defective DNA repair genes; however, further studies to clinically qualify predictive biomarkers are warranted. Herein we analyzed TOPARP-B Phase II clinical trial samples, evaluating whole exome and low-pass whole genome sequencing and immunohistochemical assays evaluating ATM and RAD51 foci (testing homologous recombination repair function). BRCA1/2 germline and somatic pathogenic mutations associated with similar benefit from olaparib; greater benefit was observed with homozygous BRCA deletion. Biallelic, but not mono-allelic, PALB2 deleterious alterations were associated with clinical benefit. In the ATM cohort, loss of ATM protein by immunohistochemistry associated with better outcome. RAD51 foci loss identified tumors with biallelic BRCA and PALB2 alteration while most ATM- and CDK12-altered APCs had higher RAD51 foci levels. Overall, APCs with homozygous BRCA2 deletion are exceptional responders; PALB2 biallelic loss and loss of ATM immunohistochemical expression associated with clinical benefit
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