Retired galaxies: not to be forgotten in the quest of the star formation -- AGN connection

We propose a fresh look at the Main Galaxy Sample of the Sloan Digital Sky Survey by packing the galaxies in stellar mass and redshift bins. We show how important it is to consider the emission-line equivalent widths, in addition to the commonly used emission-line ratios, to properly identify retired galaxies (i.e. galaxies that have stopped forming stars and are ionized by their old stellar populations) and not mistake them for galaxies with low-level nuclear activity. We find that the proportion of star-forming galaxies decreases with decreasing redshift in each mass bin, while that of retired galaxies increases. Galaxies with $M_\star > 10^{11.5} M_\odot$ have formed all their stars at redshift larger than 0.4. The population of AGN hosts is never dominant for galaxy masses larger than $10^{10} M_\odot$. We warn about the effects of stacking galaxy spectra to discuss galaxy properties. We estimate the lifetimes of active galactic nuclei (AGN) relying entirely on demographic arguments --- i.e. without any assumption on the AGN radiative properties. We find upper-limit lifetimes of about 1--5 Gyr for detectable AGN in galaxies with masses between $10^{10}$--$10^{12} M_\odot$. The lifetimes of the AGN-dominated phases are a few $10^8$ yr. Finally, we compare the star-formation histories of star-forming, AGN and retired galaxies as obtained by the spectral synthesis code STARLIGHT. Once the AGN is turned on it inhibits star formation for the next $\sim$ 0.1 Gyr in galaxies with masses around $10^{10} M_\odot$, $\sim$ 1 Gyr in galaxies with masses around $10^{11} M_\odot$.Comment: accepted for MNRAS figure resolution has been degraded with respect to what will be published in MNRA

An atlas of Calcium triplet spectra of active galaxies

We present a spectroscopic atlas of active galactic nuclei covering the region around the 8498, 8542, 8662 Calcium triplet (CaT) lines. The sample comprises 78 objects, divided into 43 Seyfert 2s, 26 Seyfert 1s, 3 Starburst and 6 normal galaxies. The spectra pertain to the inner ~300 pc in radius, and thus sample the central kinematics and stellar populations of active galaxies. The data are used to measure stellar velocity dispersions (sigma_star) both with cross-correlation and direct fitting methods. These measurements are found to be in good agreement with each-other and with those in previous studies for objects in common. The CaT equivalent width is also measured. We find average values and sample dispersions of W_CaT of 4.6+/-2.0, 7.0 and 7.7+/-1.0 angstrons for Seyfert 1s, Seyfert 2s and normal galaxies, respectively. We further present an atlas of [SIII]\lambda 9069 emission line profiles for a subset of 40 galaxies. These data are analyzed in a companion paper which addresses the connection between stellar and Narrow Line Region kinematics, the behaviour of the CaT equivalent width as a function of sigma_star, activity type and stellar population properties.Comment: 18 pages, 10 figures, accepted for publication in MNRA

Non-commutative integrable systems on bb-symplectic manifolds

In this paper we study non-commutative integrable systems on $b$-Poisson manifolds. One important source of examples (and motivation) of such systems comes from considering non-commutative systems on manifolds with boundary having the right asymptotics on the boundary. In this paper we describe this and other examples and we prove an action-angle theorem for non-commutative integrable systems on a $b$-symplectic manifold in a neighbourhood of a Liouville torus inside the critical set of the Poisson structure associated to the $b$-symplectic structure

Bioecology of different estadios of D. hominis (Linnaeus Jr., 1781) set up with different substrates in terms of laboratory

Larvae of Dermatobia hominis were harvested from naturally infected animals, and treated in laboratory conditions in order to play its life cycle. With the development of all stages of D. hominis in the laboratory, from the laying of eggs until the formation of a new imago, will become possible to assess the conditions for the survival of each stage, which could help in the development of new techniques for its control. We tested different ways substrates for the development, consisting of land, sand and sawdust. Different means employed for the development of pupa, D. hominis were considered satisfactory, but statistically different (P<0.05). Treatment composed of sawdust and sand, was the most appropriate means, for presenting development of 54% of L3 larvae and pupae in 62% of those in adults, D. hominis, and 79% males and 41% females. The average life of adults also varied according to sex, whereas 49% of the males had a lifetime average of 5 days, as 70% of females had a lifetime average between 8 and 9 days.Larvas de Dermatobia hominis foram colhidas, de animais naturalmente infestados, e tratadas em condições de laboratório com a finalidade de reproduzir seu ciclo biológico. Com o desenvolvimento de todos os estádios da D. hominis em laboratório, desde a postura dos ovos até a formação de um novo imago, tornar-se-á possível a avaliação das condições para a sobrevivência de cada estádio, o que poderia contribuir no desenvolvimento de novas técnicas para o seu controle. Foram testados diferentes meios substratos para o desenvolvimento, compostos por terra, areia e serragem. Os diferentes meios empregados para o desenvolvimento de pupa de D. hominis foram considerados satisfatórios, porém, estatisticamente distintos (P<0,05). O tratamento composto por serragem e areia, foi o meio mais adequado, por ter apresentado desenvolvimento de 54% das larvas L3 em pupas e 62% destas em adultos de D. hominis, sendo 79% machos e 41% fêmeas. A vida média dos adultos também variou de acordo com o sexo, sendo que 49% dos machos apresentaram uma vida média de 5 dias, já 70% das fêmeas apresentaram uma vida média entre 8 e 9 dias

Crescimento inicial de porta enxertos cítricos em substratos alternativos.

A produção de mudas cítricas de qualidade, passa pela produção em ambiente protegido, que apesar de aumentar o preço das mudas, qualifica-as com padrão fitossanitário. Entretanto, o que limita a adoção desse sistema de forma irrestrita no país é o alto custo da estufa e do substrato comercial. Para tanto, estudos que visem à elaboração de substratos alternativos, de fácil e constante disponibilidade a um baixo custo, tornam-se essenciais para dar suporte à modernização na produção de mudas, principalmente pelos pequenos viveiristas da região Nordeste e especialmente do Estado da Paraíba

Mapeamento da Ocorrência do Mal-do-Panamá em Rondônia.

Em Rondônia, o Mal-do-Panamá apresenta-se juntamente com a Sigatoka Negra e Amarela as doenças de maior relevância da bananicultura. Foi detectado Mal-doPanamá em diferentes municípios do Estado, tais como Mirante da Serra, Governador Jorge Teixeira, São Miguel do Guaporé, Machadonho do Oeste e Alvorada do Oeste, dentre outros. A doença é causada pelo fungo Fusarium oxysporum f.sp. cubense (E.F. Smith) Sn & Hansen. Este fungo pertence à classe dos deuteromicetos e caracteriza-se pela grande capacidade de sobrevivência na ausência do hospedeiro, permanecendo no solo por longos períodos de tempo...bitstream/CPAF-RO-2010/13273/1/cot330-maldopanama.pd

Magnetic excitations in underdoped Ba(Fe1-xCox)2As2 with x=0.047

The magnetic excitations in the paramagnetic-tetragonal phase of underdoped Ba(Fe0.953Co0.047)2As2, as measured by inelastic neutron scattering, can be well described by a phenomenological model with purely diffusive spin dynamics. At low energies, the spectrum around the magnetic ordering vector Q_AFM consists of a single peak with elliptical shape in momentum space. At high energies, this inelastic peak is split into two peaks across the direction perpendicular to Q_AFM. We use our fittings to argue that such a splitting is not due to incommensurability or propagating spin-wave excitations, but is rather a consequence of the anisotropies in the Landau damping and in the magnetic correlation length, both of which are allowed by the tetragonal symmetry of the system. We also measure the magnetic spectrum deep inside the magnetically-ordered phase, and find that it is remarkably similar to the spectrum of the paramagnetic phase, revealing the strongly overdamped character of the magnetic excitations.Comment: 12 pages, 7 figure

Benefits measurement of a plan to reduce hypertension in a healthcare foundation using the BCTool

The hypertension is a well know problem and associated with a high salt consuming is one of the commonest chronic diseases.To measure the impact of this consuming it has been applied the methodology provided by the Business Case tool (BC Tool), in a Portuguese foundation for elderly, in order to contribute for Intervention Plan for the reduction of hypertension which aims to reduce salt consumption in the Portuguese population and to improve the control of Hypertension through a phased reduction in salt consumption.This objective has been achieved by changing the availability of foods with lower salt contents and by decreasing the addition of salt in cooking. The results of these measures provided a substantial benefit in terms of Benefits Measurements and Cost Analysis besides the results of SROI measurement in order to obtain the social benefits of this initiative of the Intervention plan to reduce hypertension. Along these results it has been collected the suggestions for improvements that would allow the Sarah Beirão Foundation's response to the needs of its users to be improved.info:eu-repo/semantics/publishedVersio