Keele University

About: Keele University is a education organization based out in Newcastle-under-Lyme, United Kingdom. It is known for research contribution in the topics: Population & Stars. The organization has 11318 authors who have published 26323 publications receiving 894671 citations. The organization is also known as: Keele University.

The HERSCHEL Inventory of The Agents of Galaxy Evolution in the Magellanic Clouds, a Herschel Open Time Key Program

Abstract: We present an overview of the HERschel Inventory of The Agents of Galaxy Evolution (HERITAGE) in the Magellanic Clouds project, which is a Herschel Space Observatory open time key program. We mapped the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC) at 100, 160, 250, 350, and 500 μm with the Spectral and Photometric Imaging Receiver (SPIRE) and Photodetector Array Camera and Spectrometer (PACS) instruments on board Herschel using the SPIRE/PACS parallel mode. The overriding science goal of HERITAGE is to study the life cycle of matter as traced by dust in the LMC and SMC. The far-infrared and submillimeter emission is an effective tracer of the interstellar medium (ISM) dust, the most deeply embedded young stellar objects (YSOs), and the dust ejected by the most massive stars. We describe in detail the data processing, particularly for the PACS data, which required some custom steps because of the large angular extent of a single observational unit and overall the large amount of data to be processed as an ensemble. We report total global fluxes for the LMC and SMC and demonstrate their agreement with measurements by prior missions. The HERITAGE maps of the LMC and SMC are dominated by the ISM dust emission and bear most resemblance to the tracers of ISM gas rather than the stellar content of the galaxies. We describe the point source extraction processing and the criteria used to establish a catalog for each waveband for the HERITAGE program. The 250 μm band is the most sensitive and the source catalogs for this band have ~25,000 objects for the LMC and ~5500 objects for the SMC. These data enable studies of ISM dust properties, submillimeter excess dust emission, dust-to-gas ratio, Class 0 YSO candidates, dusty massive evolved stars, supernova remnants (including SN1987A), H II regions, and dust evolution in the LMC and SMC. All images and catalogs are delivered to the Herschel Science Center as part of the community support aspects of the project. These HERITAGE images and catalogs provide an excellent basis for future research and follow up with other facilities.

Do patients have worse outcomes in heart failure than in cancer? A primary care-based cohort study with 10-year follow-up in Scotland.

Abstract: MS and IB were supported by the University of Manchester's Health eResearch Centre (HeRC) funded by the Medical Research Council (MRC) Grant MR/K006665/1.

Work Demands on Administrators and Spouse Well-Being

Abstract: This field study investigated the relationship of work demands experienced by 85 male senior administrators of correctional institutions and the well-being of their spouses. Data were collected by means of questionnaires completed independently by the husbands and their wives. The results indicated that wives whose husbands reported greater occupational demands reported (1) less marital and life satisfaction, (2) decreased social participation, and (3) increased psychosomatic symptoms and negative feeling states. In no case was wives' well-being enhanced as a function of increased occupational demands on husbands. Job demands thus had an influence beyond the workplace and into the lives of their spouses. The interaction between work and nonwork experiences for the quality of individual's lives and the interdependence of husband and wife in this regard require further consideration.

The s-Process in Massive Stars at Low Metallicity: The Effect of Primary 14N from Fast Rotating Stars

Abstract: The goal of this Letter is to analyze the impact of a primary neutron source on the s-process nucleosynthesis in massive stars at halo metallicity. Recent stellar models including rotation at very low metallicity predict a strong production of primary 14N. Part of the nitrogen produced in the H-burning shell diffuses by rotational mixing into the He core where it is converted to 22Ne providing additional neutrons for the s-process. We present nucleosynthesis calculations for a 25 M -->☉ star at [Fe/H] = –3, –4, where about 0.8% in mass is made of primary 22Ne in the convective He-burning core. The usual weak s-process shape is changed by the additional neutron source with a peak between Sr and Ba, where the s-process yields increase by orders of magnitude with respect to the yields obtained without rotation. Iron seeds are fully consumed and the maximum production of Sr, Y, and Zr is reached. On the other hand, the s-process efficiency beyond Sr and the ratio Sr/Ba are strongly affected by the amount of 22Ne and by nuclear uncertainties, first of all by the 22Ne(α, n)25Mg reaction. Finally, assuming that 22Ne is primary in the considered metallicity range, the s-process efficiency decreases with metallicity due to the effect of the major neutron poisons 25Mg and 22Ne. This work represents a first step toward the study of primary neutron source effect in fast rotating massive stars, and its implications are discussed in the light of spectroscopic observations of heavy elements at halo metallicity.