THROES: a caTalogue of HeRschel Observations of Evolved Stars. I. PACS range spectroscopy

This is the first of a series of papers presenting the THROES (A caTalogue of HeRschel Observations of Evolved Stars) project, intended to provide a comprehensive overview of the spectroscopic results obtained in the far-infrared (55-670 microns) with the Her- schel space observatory on low-to-intermediate mass evolved stars in our Galaxy. Here we introduce the catalogue of interactively reprocessed PACS (Photoconductor Array Camera and Spectrometer) spectra covering the 55-200 microns range for 114 stars in this category for which PACS range spectroscopic data is available in the Herschel Science Archive (HSA). Our sample includes objects spanning a range of evolutionary stages, from the asymptotic giant branch to the planetary nebula phase, displaying a wide variety of chemical and physical properties. The THROES/PACS catalogue is accessible via a dedicated web-based inter- face (https://throes.cab.inta-csic.es/) and includes not only the science-ready Herschel spectroscopic data for each source, but also complementary photometric and spectroscopic data from other infrared observatories, namely IRAS (Infrared Astronomical Satellite), ISO (Infrared Space Observatory) or AKARI, at overlapping wavelengths. Our goal is to create a legacy-value Herschel dataset that can be used by the scientific community in the future to deepen our knowledge and understanding of these latest stages of the evolution of low-to-intermediate mass stars.Comment: 38 page

Geology of the Arroio Grande Metamafic-Ultramafic Association, Southeasterh Sul-Rio-Grandense Shield

No Rio Grande do Sul são reconhecidas e descritas diversas ocorrências de rochas ultramáficas nas porções central e ocidental do Escudo Sul-rio-grandense. No entanto, para a porção oriental, nenhum trabalho de cunho científico fez referência a esse tipo de litologia até o momento. No presente artigo é apresentado o estudo de uma associação de rochas máficas e ultramáficas metamorfizadas, localizada no extremo sul da por- ção oriental do Escudo, nas proximidades do município de Arroio Grande. Através das investigações de campo realizadas nessa área em conjunto com petrografia, microscopia eletrônica de varredura e difratometria de raios-X foram identificados anfibolitos à base de hornblenda, plagioclásio e epidoto, e serpentinitos cromíferos e seus produtos metassomáticos (tremolititos, clorititos e talco xistos). Foram caracterizadas paragêneses de fácies anfibolito tanto para os epidoto anfibolitos como para os metassomatitos. A associação de rochas de Arroio Grande foi interpretada como fragmentos de um antigo assoalho oceânico obductado durante o fechamento de um paleo-oceano no Neoproterozoico, pela possível colisão das paleoplacas Kalahari e Río de La Plata nos estágios finais da amalgamação do paleocontinente Gondwana Ocidental.In Rio Grande do Sul State (southern Brazil) several occurrences of ultramafic rocks are recognized and described in the central and western portions of the Sul-rio-grandense Shield. However, no scientific work referred to this type of rock association for the eastern portion of the Shield. In this paper, a study of a metamafic-ultramafic rock association is shown, located at the southern end of the eastern portion of the Sul-Rio- -Grandense Shield, near the town of Arroio Grande. Through field investigation, petrography, scanning electron microscopy and X-ray diffraction hornblende-plagioclase-epidote rich amphibolites, chromian serpentinites and their metasomatic products (tremolitites, chloritites and talc schists) were identified. Amphibolite facies paragenesis were characterized for both epidote amphibolites and metasomatites. The Arroio Grande rock association was interpreted to represent fragments of an ancient ocean floor obducted during the closure of a paleo-ocean in Neoproterozoic times, possibly due to collision of the Kalahari and Río de La Plata paleoplates in the final stages of Western Gondwana assembly

Preliminary u isotopic data in the Cádiz coastal area (SW Spain) as proxy for coastal groundwater discharge

Peer Reviewe

The essential oil of Brazilian pepper, Schinus terebinthifolia Raddi in larval control of Stegomyia aegypti (Linnaeus, 1762)

<p>Abstract</p> <p>Background</p> <p>The ability of mosquitoes of the genus <it>Aedes </it>and its allies, such as <it>Stegomyia</it>, to transmit diseases such as dengue and yellow fever, makes them important in public health. This study aims to evaluate the use of the essential oil of Brazilian pepper in biological control of by assessing and quantifying the larvicidal effect against <it>S. aegypti</it>, the only available access to dengue control, and test its risk of genotoxicity with <it>Salmonella typhimurium </it>as an indicator of safety for its environmental use.</p> <p>Results</p> <p>The density of the oil was 0.8622 g mL^-1. Gas chromatography coupled with mass spectrometry revealed six major constituents: δ-3-carene (55.43%), α-pinene (16.25%), sylvestrene (10.67%), germacrene D (2.17), β-myrcene (1.99%), and isoterpinolene (1.4%). The minimum inhibitory dose to larvae development was 862.20 μg mL^-1. The median lethal dose (LD₅₀) of the essential oil for larvae was between the concentrations of 172.44-344.88 μg mL^-1. There was no mutagenic risk for the essential oil, since there were no biochemical or morphological changes in <it>S. typhimurium </it>after exposure to the essential oil.</p> <p>Conclusions</p> <p>The minimum inhibitory essential oil concentration and the median lethal dose pointed to the value of the use of water dispersions of Brazilian pepper essential oil as an environmental safe natural larvicidal for <it>S. aegypti</it>.</p

Second order SUSY transformations with `complex energies'

Second order supersymmetry transformations which involve a pair of complex conjugate factorization energies and lead to real non-singular potentials are analyzed. The generation of complex potentials with real spectra is also studied. The theory is applied to the free particle, one-soliton well and one-dimensional harmonic oscillator.Comment: 11 pages, 2 figures, submitted on 23 August 2002 to Phys. Lett.

Disk galaxies are self-similar: the universality of the HI-to-Halo mass ratio for isolated disks

Observed scaling relations in galaxies between baryons and dark matter global properties are key to shed light on the process of galaxy formation and on the nature of dark matter. Here, we study the scaling relation between the neutral hydrogen (HI) and dark matter mass in isolated rotationally-supported disk galaxies at low redshift. We first show that state-of-the-art galaxy formation simulations predict that the HI-to-dark halo mass ratio decreases with stellar mass for the most massive disk galaxies. We then infer dark matter halo masses from high-quality rotation curve data for isolated disk galaxies in the local Universe, and report on the actual universality of the HI-to-dark halo mass ratio for these observed galaxies. This scaling relation holds for disks spanning a range of 4 orders of magnitude in stellar mass and 3 orders of magnitude in surface brightness. Accounting for the diversity of rotation curve shapes in our observational fits decreases the scatter of the HI-to-dark halo mass ratio while keeping it constant. This finding extends the previously reported discrepancy for the stellar-to-halo mass relation of massive disk galaxies within galaxy formation simulations to the realm of neutral atomic gas. Our result reveals that isolated galaxies with regularly rotating extended HI disks are surprisingly self-similar up to high masses, which hints at mass-independent self-regulation mechanisms that have yet to be fully understood.Comment: 14 pages, 4 figures. Accepted for publication in ApJ