3 resultados para Weiner, Gaby
em Universidade Complutense de Madrid
Resumo:
La prevalencia de consumo de tabaco en personas con trastornos mentales oscila entre un 42% y un 78% dependiendo del tipo de trastorno que padezcan (Solty, Crockford, White y Currie, 2009; Stockings et al., 2013), encontrándose las mayores tasas de consumo de tabaco y de dependencia a la nicotina en las personas con trastorno mental grave ingresadas en centros psiquiátricos (Lineberry, Allen, Nash, y Galardy, 2009). Es poco habitual que a los fumadores con psicopatología se les ofrezca tratamiento para disminuir o abandonar el consumo de tabaco, basándose en parte esta decisión en la creencia de que no están motivados para dejar de fumar. Sin embargo, se ha demostrado que muchos de estos fumadores muestran deseos de dejar de fumar, han realizado algún intento en el último año para conseguirlo y refieren que ya no disfrutan fumando, siendo una de sus principales motivaciones la preocupación por el propio estado de salud (Etter, Mohr, Garin y Etter, 2004; Mann-Wrobel, Bennett, Weiner, Buchanan y Ball, 2011)...
Resumo:
We present some of the first science data with the new Keck/MOSFIRE instrument to test the effectiveness of different AGN/SF diagnostics at z ~ 1.5. MOSFIRE spectra were obtained in three H-band multi-slit masks in the GOODS-S field, resulting in 2 hr exposures of 36 emission-line galaxies. We compare X-ray data with the traditional emission-line ratio diagnostics and the alternative mass-excitation and color-excitation diagrams, combining new MOSFIRE infrared data with previous HST/WFC3 infrared spectra (from the 3D-HST survey) and multiwavelength photometry. We demonstrate that a high [O III]/Hβ ratio is insufficient as an active galactic nucleus (AGN) indicator at z > 1. For the four X-ray-detected galaxies, the classic diagnostics ([O III]/Hβ versus [N II]/Hα and [S II]/Hα) remain consistent with X-ray AGN/SF classification. The X-ray data also suggest that "composite" galaxies (with intermediate AGN/SF classification) host bona fide AGNs. Nearly ~2/3 of the z ~ 1.5 emission-line galaxies have nuclear activity detected by either X-rays or the classic diagnostics. Compared to the X-ray and line ratio classifications, the mass-excitation method remains effective at z > 1, but we show that the color-excitation method requires a new calibration to successfully identify AGNs at these redshifts.
Resumo:
We show that measures of star formation rates (SFRs) for infrared galaxies using either single-band 24 μm or extinction-corrected Paα luminosities are consistent in the total infrared luminosity = L(TIR) ~ 10^10 L_☉ range. MIPS 24 μm photometry can yield SFRs accurately from this luminosity upward: SFR(M_☉ yr^–1) = 7.8 × 10^–10 L(24 μm, L_☉) from L(TIR) = 5× 10^9 L_☉ to 10^11 L_☉ and SFR = 7.8 × 10^–10 L(24 μm, L_☉)(7.76 × 10^–11 L(24))^0.048 for higher L(TIR). For galaxies with L(TIR) ≥ 10^10 L_☉, these new expressions should provide SFRs to within 0.2 dex. For L(TIR) ≥ 10^11 L_☉, we find that the SFR of infrared galaxies is significantly underestimated using extinction-corrected Paα (and presumably using any other optical or near-infrared recombination lines). As a part of this work, we constructed spectral energy distribution templates for eleven luminous and ultraluminous purely star forming infrared galaxies and over the spectral range 0.4 μm to 30 cm. We use these templates and the SINGS data to construct average templates from 5 μm to 30 cm for infrared galaxies with L(TIR) = 5× 10^9 to 10^13 L_☉. All of these templates are made available online.