Search for ultrahigh energy neutrinos in highly inclined events at the Pierre Auger Observatory

The Surface Detector of the Pierre Auger Observatory is sensitive to neutrinos of all flavors above 0.1 EeV. These interact through charged and neutral currents in the atmosphere giving rise to extensive air showers. When interacting deeply in the atmosphere at nearly horizontal incidence, neutrinos can be distinguished from regular hadronic cosmic rays by the broad time structure of their shower signals in the water-Cherenkov detectors. In this paper we present for the first time an analysis based on down-going neutrinos. We describe the search procedure, the possible sources of background, the method to compute the exposure and the associated systematic uncertainties. No candidate neutrinos have been found in data collected from 1 January 2004 to 31 May 2010. Assuming an E-2 differential energy spectrum the limit on the single-flavor neutrino is E(2)dN/dE < 1.74 x 10(-7)GeVcm(-2)s(-1)sr(-1) at 90% C.L. in the energy range 1 x 10(17) eV < E < 1 x 10(20)eV.

A VLT/FLAMES survey for massive binaries in Westerlund 1. IV. Wd1-5 – binary product and a pre-supernova companion for the magnetar CXOU J1647-45?

Context. The first soft gamma-ray repeater was discovered over three decades ago, and was subsequently identified as a magnetar, a class of highly magnetised neutron star. It has been hypothesised that these stars power some of the brightest supernovae known, and that they may form the central engines of some long duration gamma-ray bursts. However there is currently no consenus on the formation channel(s) of these objects. Aims. The presence of a magnetar in the starburst cluster Westerlund 1 implies a progenitor with a mass ≥40 M⊙, which favours its formation in a binary that was disrupted at supernova. To test this hypothesis we conducted a search for the putative pre-SN companion. Methods. This was accomplished via a radial velocity survey to identify high-velocity runaways, with subsequent non-LTE model atmosphere analysis of the resultant candidate, Wd1-5. Results. Wd1-5 closely resembles the primaries in the short-period binaries, Wd1-13 and 44, suggesting a similar evolutionary history, although it currently appears single. It is overluminous for its spectroscopic mass and we find evidence of He- and N-enrichement, O-depletion, and critically C-enrichment, a combination of properties that is difficult to explain under single star evolutionary paradigms. We infer a pre-SN history for Wd1-5 which supposes an initial close binary comprising two stars of comparable (~ 41 M⊙ + 35 M⊙) masses. Efficient mass transfer from the initially more massive component leads to the mass-gainer evolving more rapidly, initiating luminous blue variable/common envelope evolution. Reverse, wind-driven mass transfer during its subsequent WC Wolf-Rayet phase leads to the carbon pollution of Wd1-5, before a type Ibc supernova disrupts the binary system. Under the assumption of a physical association between Wd1-5 and J1647-45, the secondary is identified as the magnetar progenitor; its common envelope evolutionary phase prevents spin-down of its core prior to SN and the seed magnetic field for the magnetar forms either in this phase or during the earlier episode of mass transfer in which it was spun-up. Conclusions. Our results suggest that binarity is a key ingredient in the formation of at least a subset of magnetars by preventing spin-down via core-coupling and potentially generating a seed magnetic field. The apparent formation of a magnetar in a Type Ibc supernova is consistent with recent suggestions that superluminous Type Ibc supernovae are powered by the rapid spin-down of these objects.

Ler, ou não ler: eis a questão

A literacia em saúde é de extrema importância em contexto familiar. Neste sentido, todos os setores sociais se devem envolvem para melhorar o estado de saúde das famílias. A capacitação dos cidadãos permite-lhes uma procura constante de qualidade de vida. A literacia é um meio de compreensão da informação escrita, útil ao dia a dia de cada um, que permite consciencializar as pessoas para tomadas de decisões acertadas. Numa amostra de doze participantes do concelho de Tábua (seis crianças e seis adultos), com idades entre os 8 e os 40 anos, foram avaliados hábitos de leitura e qual a sua relação com a alimentação, o exercício físico, as emoções e a higiene. Através de um processo de investigação-ação, da participação ativa e do empowerment foram realizadas sessões lúdicas e temáticas com o público infantil, adulto e em família. Após esta intervenção foi visível o interesse e a motivação destas famílias na melhoria da sua qualidade de vida, partindo da literacia em saúde. Este facto demonstra a vontade dos intervenientes em participar em programas de promoção para a saúde, o que permite concluir que projetos desta natureza são importantes para a comunidade de Tábua, que apresenta baixos níveis de literacia

Periēgēsis eis ton Ponton,

Mode of access: Internet.

Royal Gorge EIS area, Colorado : proposed domestic livestock grazing program : draft environmental impact statement /

Includes index.

Sancti Irenaei Episcopi Lugdunensis Demonstratio apostolicae praedicationis = [Eis epideixin tou apostolikou kåerygmatos] /

Disbound original held in Oak Street Library Facility.

Proposed cooperative gypsy moth suppression and regulatory program activities : final programmatic EIS environmental impact statement.

Includes index.

Alexandrou Afrodisieos eis ta topika Aristoteloius upomnemata = Alexandri Aphrodisiei in topica Aristotelis Commentarij.

Mode of access: Internet.

Oulpianou rhetoros prolegomena eis te tous Olynthianous, kai Philippikous Demosthenous logous. Exgsis anankaiota t, eis dekatreis tou Demosthenous logous = Vlpiani commentarioli in Olynthiacas, Philippicasq[ue] Demosthenis Orationes. Enarrationes saneq[ue] necessariae in tredecim orationes Demosthenis.

Incluye: Arpokratiònos lexikon tein deka rhetoròn.

De vulneribus abdominis cum intestinorum laesione et utrum sutura instituenda in eis sit? [Manuscrito] /

Acompaña nota del bibliotecario reseñando los libros solicitados para la redacción de esta memoria.

Didymou tou palaiotatou eis ten Odysseian esegsis = Didymi antiquissimi auctoris interpretatio in Odisseam ...

Mode of access: Internet.

Simplikiou ypomnemata eis tessara Biblia Aristotelous peri ouranou, meta tou ypokeimenou tou autou = Simplicii commentarii quatuor Aristotelis libros De coelo cum textu eiusdem.

Mode of access: Internet.

D.D. Josephi de Rosa ... Consultationes juris selectissimae : cum decisionibus super eis prolatis à supremis Neapolitani Regni Tribunalibus.

Mode of access: Internet.