14 research outputs found

    Axisymmetrical Gas Inflow in the Central Region of NGC 7331

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    New Integral Field Spectroscopy of the central region of NGC 7331 reveals strong Hα\alpha emission in the well-known CO and HI ring of NGC 7331. The [NII]/Hα\alpha ratio indicates that a large scale stellar formation process is taken place at the ring in agreement with previous hypothesis about the exhaustion of gas in the inner to the ring region. The dynamics of stars and gas are not coupled. There is a ring of peculiar velocities in the ionized gas velocity map. These peculiar velocities can be well interpreted by the presence of an axisymmetric inflow of 40 km/s at the inner boundary of the large-scale gaseous ring. We infer an inwards total flux of 1.6 M_{\odot}yr1^{-1}. This value is typical of the accretion rates in hypothetical {\bf large} nuclear black holes. Despite the large differences in the scales of the nucleus and the gas ring of NGC 7331, we suggest that this inwards flux is feeding the nucleus.Comment: 5 pages, 3 figures, to be published in Astronomy and Astrophysic

    The ALHAMBRA survey: reliable morphological catalogue of 22 051 early- and late-type galaxies

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    Advanced Large Homogeneous Area Medium Band Redshift Astronomical (ALHAMBRA) is photometric survey designed to trace the cosmic evolution and cosmic variance. It covers a large area of ~4 deg2 in eight fields, where seven fields overlap with other surveys, allowing us to have complementary data in other wavelengths. All observations were carried out in 20 continuous, medium band (30 nm width) optical and 3 near-infrared (JHK) bands, providing the precise measurements of photometric redshifts. In addition, morphological classification of galaxies is crucial for any kind of galaxy formation and cosmic evolution studies, providing the information about star formation histories, their environment and interactions, internal perturbations, etc. We present a morphological classification of >40 000 galaxies in the ALHAMBRA survey. We associate to every galaxy a probability to be early type using the automated Bayesian code GALSVM. Despite of the spatial resolution of theALHAMBRAimages (~1 arcsec), for 22 051 galaxies, we obtained the contamination by other type of less than 10 per cent. Of those, 1640 and 10 322 galaxies are classified as early-(down to redshifts ~0.5) and late-type (down to redshifts ~1.0), respectively, with magnitudes F613W ≤ 22.0. In addition, for magnitude range 22.0 < F613W ≤ 23.0, we classified other 10 089 late-type galaxies with redshifts ≤1.3.We show that the classified objects populate the expected regions in the colour-mass and colour-magnitude planes. The presented data set is especially attractive given the homogeneous multiwavelength coverage available in the ALHAMBRA fields, and is intended to be used in a variety of scientific applications. The low-contamination catalogue (<10 per cent) is made publicly available with this paper. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.This research was supported by the Junta de Andalucía through projects PO8-TIC-03531 and TIC114, the Spanish Ministry of Economy and Competitiveness (MINECO) through projects AYA2006-14046, AYA2010-15169, AYA2010-22111-C03-02, AYA2011-29517-C03-01, and the Generalitat Valenciana through project GV/Prometeo 2009/064. MP acknowledges financial support from JAE-Doc program of the Spanish National Research Council (CSIC), co-funded by the European Social Fund.Peer Reviewe

    Nuevas terapias dirigidas para el tratamiento del cáncer

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    El cáncer es el término que se utiliza para englobar un conjunto de enfermedades que se caracterizan por el crecimiento descontrolado de células alteradas molecularmente por mutaciones o modificaciones epigenéticas.En la presente revisión describimos algunas terapias dirigidas que se están utilizando actualmente en clínic

    Entre artistas y restauradorӕs. Nuevos formatos de interacción e intercambio de conocimiento

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    Este proyecto ha tenido como objetivo la consolidación de una red de cooperación horizontal e intercambio interdisciplinar, internivelar, interdepartamental e interfacultativa entre artistas y conservadoræs-restauradoræs, así como la exploración de nuevas formas de interacción para generar conocimiento. Esta red conecta entre sí a los departamentos de la Facultad de Bellas Artes de la UCM (Dibujo y Grabado; Diseño e Imagen; y Pintura y Conservación-Restauración), al tiempo que fomenta interacciones con estudiantes y docentes de departamentos de arte y conservación-restauración de otras universidades públicas y privadas como son la Universidad de la Laguna, la Universidad Politécnica de Madrid, la Universidad Francisco de Vitoria y la Universidad Antonio Nebrija. Así mismo, incorpora a la red un organismo externo al ámbito de la universidad y vinculado al ámbito profesional de la práctica artística, como es la Asociación Cultural Atelier Solar. El proyecto ha abarcado la realización de tres encuentros, un curso, una mesa redonda, la dirección de TFGs, la visita a estudios de artistas y el desarrollo de una investigación en torno a nuevos formatos de interacción entre conservadoræs-restauradoræs y artistas. Esta memoria recoge los objetivos propuestos y evalúa los alcanzados en base a una serie de indicadores, describe la metodología utilizada en el proyecto, analiza las características del equipo de trabajo y expone las actividades desarrolladas durante el curso 2021-2022. Los Anexos incluyen documentación sobre las actividades desarrolladas e imágenes sobre los procesos de investigación

    Lyman break and ultraviolet-selected galaxies at z ∼ 1 - I. Stellar populations from the ALHAMBRA survey

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    We take advantage of the exceptional photometric coverage provided by the combination of GALEX data in the ultraviolet (UV) and the ALHAMBRA survey in the optical and near-infrared to analyse the physical properties of a sample of 1225 GALEX-selected Lyman break galaxies (LBGs) at 0.8 ≲ z ≲ 1.2 that are located in the COSMOS field. This is the largest sample of LBGs studied in this redshift range to date. According to a spectral energy distribution (SED) fitting with synthetic stellar population templates, we find that LBGs at z ̃ 1 are mostly young galaxies with a median age of 341 Myr and have intermediate dust attenuation, (Es(B - V)) ̃ 0.20. Owing to the selection criterion, LBGs at z ̃ 1 are UV-bright galaxies and have a high dust-corrected total star formation rate (SFR), with a median value of 16.9M⊙ yr-1. Their median stellar mass is log (M*/M⊙) = 9.74. We find that the dustcorrected total SFR of LBGs increases with stellar mass and that the specific SFR is lower for more massive galaxies (downsizing scenario). Only 2 per cent of the galaxies selected through the Lyman break criterion have an active galactic nucleus nature. LBGs at z ̃ 1 are located mostly over the blue cloud of the colour-magnitude diagram of galaxies at their redshift, with only the oldest and/or the dustiest deviating towards the green valley and red sequence. Morphologically, 69 per cent of LBGs are disc-like galaxies, with the fractions of interacting, compact, or irregular systems being much lower, below 12 per cent. LBGs have a median effective radius of 2.5 kpc, and larger galaxies have a higher total SFR and stellar mass. Compared with their high-redshift analogues, we find evidence that LBGs at lower redshifts are larger, redder in the UV continuum, and have a major presence of older stellar populations in their SEDs. However, we do not find significant differences in the distributions of stellar mass or dust attenuation. ©2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.This research has been supported by the Spanish Ministerio de Economía y Competitividad (MINECO) under grant AYA2011-29517-C03-01. Funding for the SDSS and SDSS-II was provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, the US Department of Energy, the National Aeronautics and Space Administration, the Japanese Monbukagakusho, the Max Planck Society, and the Higher Education Funding Council for England. Financial support from the Spanish grant AYA2010-15169 and from the Junta de Andalucía through TIC-114 and the Excellence Project P08-TIC-03531 is acknowledged.Peer Reviewe

    Observations of the magnetars 4U 0142+61 and 1E 2259+586 with the MAGIC telescopes (Research Note)

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    Context. Magnetars are an extreme, highly magnetized class of isolated neutron stars whose large X-ray luminosity is believed to be driven by their high magnetic field. Aims. We study for the first time the possible very high energy gamma-ray emission above 100 GeV from magnetars, observing the sources 4U 0142+ 61 and 1E 2259+586. Methods. We observed the two sources with atmospheric Cherenkov telescopes in the very high energy range (E > 100 GeV). 4U0142+61 was observed with the MAGIC I telescope in 2008 for about 25 h and 1E 2259+586 was observed with the MAGIC stereoscopic system in 2010 for about 14 h. The data were analyzed with the standard MAGIC analysis software. Results. Neither magnetar was detected. Upper limits to the differential and integral flux above 200 GeV were computed using the Rolke algorithm. We obtain integral upper limits to the flux of 1.52 x 10(-12) cm(-2) s(-1) and 2.7 x 10(-12) cm(-2) s(-1) with a confidence level of 95% for 4U 0142+ 61 and 1E 2259+586, respectively. The resulting differential upper limits are presented together with X-ray data and upper limits in the GeV energy range

    Down syndrome as risk factor for respiratory syncytial virus hospitalization : A prospective multicenter epidemiological study

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    Respiratory syncytial virus (RSV) infection in childhood, particularly in premature infants, is associated with significant morbidity and mortality. To compare the hospitalization rates due to RSV infection and severity of disease between infants with and without Down syndrome (DS) born at term and without other associated risk factors for severe RSV infection. In a prospective multicentre epidemiological study, 93 infants were included in the DS cohort and 68 matched by sex and data of birth (±1 week) and were followed up to 1 year of age and during a complete RSV season. The hospitalization rate for all acute respiratory infection was significantly higher in the DS cohort than in the non-DS cohort (44.1% vs 7.7%, P<.0001). Hospitalizations due to RSV were significantly more frequent in the DH cohort than in the non-DS cohort (9.7% vs 1.5%, P=.03). RSV prophylaxis was recorded in 33 (35.5%) infants with DS. The rate of hospitalization according to presence or absence of RSV immunoprophylaxis was 3.0% vs 15%, respectively. Infants with DS showed a higher rate of hospitalization due to acute lower respiratory tract infection and RSV infection compared to non-DS infants. Including DS infants in recommendations for immunoprophylaxis of RSV disease should be considered

    Design and implementation of support and planning for 360º recording. Recording techniques (video and audio) and problem solving: application to the recording of institutional and popular science videos. Part III

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    Proyecto de Innovación Docente que se ha traducido en empleabiliad de alguno de los alumnos participantesLa grabación 360º está introduciendo variaciones sustanciales en la forma de narrar y producir contenidos audiovisuales. La posibilidad de sumergir al espectador en un entorno totalmente inmersivo en el que cada punto de vista de atención es seleccionado por el propio espectador, implica un cambio de paradigma en el papel que ejerce el director o realizador como creador y narrador de los acontecimientos. Pero, en todo lo relacionado con la producción audiovisual, el dominio de la tecnología es fundamental para llegar a la excelencia. Resulta fundamental profundizar e investigar en todas las posibilidades técnicas antes de aplicarlo al mundo profesional. Llevamos trabajando desde el curso 2018-2019 en diseñar un protocolo que permita planificar creaciones de grabación 360º tanto en lo relacionado con el vídeo como con el audio. En el curso anterior, establecimos un protocolo y empezamos a colaborar con el proyecto nº 262 Innova-Docencia, “liderado por la profesora Dña. Teresa García Nieto, en el proyecto ‘Científic@s en prácticas’ mediante un convenio con el CSIC. El objetivo es crear producciones audiovisuales en 360º que divulguen la labor desarrollada en el organismo, integrando a los alumnos del Grado de Comunicación Audiovisual, con el objetivo de que aprendan esta técnica de grabación e implementen nuevas fórmulas narrativas asociadas a la misma. El proyecto ‘Científic@s en prácticas’ consiste en tratar de captar científicos entre alumnos preuniversitarios, por lo que creemos que la producción audiovisual puede servir de estímulo para que estos alumnos de la ESO puedan comprender la naturaleza de los objetivos del proyecto en el que participan. El proyecto resulta innovador por dos motivos principales: a) el alumnado aprende directamente sobre un proyecto real la aplicación de nuevas tecnologías de producción audiovisual y b) aprenden a elaborar protocolos mediante el aprendizaje de metodologías de investigación derivadas de aplicaciones y estudios sobre el proceso. Además, dada la novedad de esta tecnología 360º, ninguna asignatura del Grado de Comunicación Audiovisual aborda esta materia entre sus contenidos.360º filming is introducing substantial variations in the way audiovisual content is narrated and produced. The possibility of immersing the viewer in a totally immersive environment in which each point of view is selected by the viewer, implies a paradigm shift in the role of the director or producer as the creator and narrator of events. But, in everything related to audiovisual production, the mastery of technology is fundamental in order to achieve excellence. It is essential to delve into and investigate all the technical possibilities before applying it to the professional world. Since the 2018-2019 academic year, we have been working on designing a protocol that allows us to plan 360º recording creations both in terms of video and audio. In the previous academic year, we established a protocol and began to collaborate with project no. 262 Innova-Docencia, "led by the teacher Ms. Teresa García Nieto, in the project 'Científic@s en prácticas' through an agreement with the CSIC. The aim is to create 360º audiovisual productions that disseminate the work carried out in the organisation, integrating the students of the Audiovisual Communication Degree, with the objective that they learn this recording technique and implement new narrative formulas associated with it. The 'Scientists in practice' project consists of trying to recruit scientists among pre-university students, so we believe that audiovisual production can serve as a stimulus for these ESO students to understand the nature of the objectives of the project in which they are participating. The project is innovative for two main reasons: a) the students learn directly on a real project the application of new audiovisual production technologies and b) they learn to develop protocols by learning research methodologies derived from applications and studies on the process. Moreover, given the novelty of this 360º technology, no other subject in the Audiovisual Communication Degree includes this subject among its contents.Depto. de Ciencias de la Comunicación AplicadaFac. de Bellas ArtesFac. de Ciencias de la InformaciónFALSEsubmitte
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