323 research outputs found
Voluntourism and the Contract Collective
Critiques of the voluntourism industry focus on power imbalances, colonial legacies, and white privilege. Drawing on the literatures of development and voluntourism to find points of comparison, we argue that the voluntourism industry reflects myriad de-velopment problems, such as structural challenges, the fungibility of aid, corruption, representation, worker narratives, and temporality. We assert that many of the prob-lems inherent in voluntourism could be remedied by the evolution of a contract norm between volunteers and their local partners, where reciprocity and transparency might practically serve as a corrective to voluntourism's most entrenched problems
Gemini NIFS survey of feeding and feedback processes in nearby Active Galaxies: I - Stellar kinematics
We use the Gemini Near-Infrared Integral Field Spectrograph (NIFS) to map the
stellar kinematics of the inner few hundred parsecs of a sample of 16 nearby
Seyfert galaxies, at a spatial resolution of tens of parsecs and spectral
resolution of 40 km/s. We find that the line-of-sight (LOS) velocity fields for
most galaxies are well reproduced by rotating disk models. The kinematic
position angle (PA) derived for the LOS velocity field is consistent with the
large scale photometric PA. The residual velocities are correlated with the
hard X-ray luminosity, suggesting that more luminous AGN have a larger impact
in the surrounding stellar dynamics. The central velocity dispersion values are
usually higher than the rotation velocity amplitude, what we attribute to the
strong contribution of bulge kinematics in these inner regions. For 50% of the
galaxies, we find an inverse correlation between the velocities and the
Gauss-Hermitte moment, implying red wings in the blueshifted side and blue
wings in the redshifted side of the velocity field, attributed to the movement
of the bulge stars lagging the rotation. Two of the 16 galaxies (NGC 5899 and
Mrk 1066) show an S-shape zero velocity line, attributed to the gravitational
potential of a nuclear bar. Velocity dispersion maps show rings of low-
values (50-80 km/s) for 4 objects and "patches" of low-sigma for 6 galaxies at
150-250 pc from the nucleus, attributed to young/ intermediate age stellar
populations.Comment: To be published in MNRA
Gemini NIFS survey of feeding and feedback in nearbyActive Galaxies - III. Ionized versus warm molecular gasmasses and distributions
We have used the Gemini Near-Infrared Integral Field Spectrograph (NIFS) in
the J and K bands to map the distribution, excitation and kinematics of the
ionized HII and warm molecular gas H, in the inner few 100 pc of 6 nearby
active galaxies: NGC 788, Mrk 607, NGC 3227, NGC 3516, NGC 5506, NGC 5899. {For
most galaxies, this is the first time that such maps have been obtained}. The
ionized and H gas show distinct kinematics: while the H gas is mostly
rotating in the galaxy plane with low velocity dispersion (), the
ionized gas usually shows signatures of outflows associated with higher
values, most clearly seen in the [FeII] emission line. These two gas
species also present distinct flux distributions: the H is more uniformly
spread over the whole galaxy plane, while the ionized gas is more concentrated
around the nucleus and/or collimated along the ionization axis of its Active
Galactic Nucleus (AGN), presenting a steeper gradient in the average surface
mass density profile than the H gas. The total HII masses cover the range
M, with surface mass densities in the range
3-150 M pc, while for the warm H the values are 10
times lower. We estimate that the available gas reservoir is at least
100 times more massive than needed to power the AGN. If this gas form new stars
the star-formation rates, obtained from the Kennicutt-schmidt scalling
relation, are in the range 1-260 10 M yr. But
the gas will also - at least in part - be ejected in the form of the observed
otflows
Caring for a child with a learning disability born into the family unit: Women's recollections over time
This is the authors' print-print version of an article published in Scandianavian journal of disability research which is available online at: http://www.tandfonline.com/doi/abs/10.1080/15017419.2010.540827Caring over time for a child/young adult with a learning disability requires that the family, and in particular the mother, negotiate their needs with services and professionals, and these negotiations are complicated further by significant behavioural issues in the children. This study reports on a series of interviews undertaken with mothers of children and young adults with learning disabilities and a history of challenging behaviours. The interviews were supplemented by documentary data from clinical and other notes in order to provide a more detailed view of the issues arising from caring over time. Detailed thematic analysis revealed five key themes demonstrating the cumulative effect of caring for someone with such complex needs, the centrality of that individual’s needs to the lives of those interviewed and the ongoing negotiation between family and professionals required in order for the former to work out how to continue caring both effectively and on their own terms. All the names of mothers and children are psuedonyms
The AGNIFS survey: spatially resolved observations of hot molecular and ionized outflows in nearby active galaxies
\ua9 2023 The Author(s). We present the hot molecular and warm ionized gas kinematics for 33 nearby (0.001 ≲ z ≲ 0.056) X-ray selected active galaxies using the H2 2.1218 μm and Br γ emission lines observed in the K band with the Gemini near-infrared integral field spectrograph. The observations cover the inner 0.04–2 kpc of each active galactic nucleus at spatial resolutions of 4–250 pc with a velocity resolution of σinst ≈ 20 km s-1. We find that 31 objects (94 per cent) present a kinematically disturbed region (KDR) seen in ionized gas, while such regions are observed in hot molecular gas for 25 galaxies (76 per cent). We interpret the KDR as being due to outflows with masses of 102–107 and 100–104 M☉ for the ionized and hot molecular gas, respectively. The ranges of mass-outflow rates (M\ub7out) and kinetic power (ĖK) of the outflows are 10-3–101 M☉ yr-1 and ∼1037–1043 erg s-1 for the ionized gas outflows, and 10-5–10-2 M☉ yr-1 and 1035–1039 erg s-1 for the hot molecular gas outflows. The median coupling efficiency in our sample is ĖK/Lbol ≈ 1.8
7 10-3 and the estimated momentum fluxes of the outflows suggest they are produced by radiation-pressure in low-density environment, with possible contribution from shocks
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