7,933 research outputs found
IR Mergers and IR QSOs with Galactic Winds. II. NGC 5514, two Extra-nuclear Starburts/LINERs with a Supergiant Bubble in the Rupture Phase
A study of morphology, kinematics and ionization structure of the IR merger
NGC 5514, is presented. This study is based mainly on Integral 2D spectroscopy
obtained on 4.2 m William Herschel Telescope (La Palma, Spain) and data from
CASLEO (Argentina). Clear evidence of two extra-nuclear starbursts with young
outflows and LINER activity are reported. One of these outflow generate a
supergiant bubble, where the emission lines and kinematics maps show 4 extended
ejections. These results suggest that the bubble is in the rupture phase.Comment: 32 pages, 30 figures, corrected version (accepted MNRAS
Integration of unaccompanied migrant youth in the United States: a call for research
Between October 2013 and July 2016, over 156,000 children travelling without their guardians were apprehended at the U.S.–Mexico border and transferred to the care of the Office of Refugee Resettlement (ORR). During that same period, ORR placed over 123,000 unaccompanied migrant youth – predominantly from Central America – with a parent or other adult sponsor residing in the U.S. Following placement, local communities are tasked with integrating migrant youth, many of whom experience pre- and in-transit migration traumas, family separation, limited/interrupted schooling, and unauthorised legal status, placing them at heightened risk for psychological distress, academic disengagement, maltreatment, and human trafficking. Nonetheless, fewer than 10% of young people receive formal post-release services (PRS). This paper addresses the paucity of research on the experiences of the 90% of children and youth without access to PRS. To bridge this gap, this article: (a) describes the post-release experiences of unaccompanied youth, focusing on legal, family, health, and educational contexts; (b) identifies methodological and ethical challenges and solutions in conducting research with this population of young people and their families; and (c) proposes research to identify structural challenges to the provision of services and to inform best practices in support of unaccompanied youth
The afterglow and kilonova of the short GRB 160821B
GRB 160821B is a short duration gamma-ray burst (GRB) detected and localized
by the Neil Gehrels Swift Observatory in the outskirts of a spiral galaxy at
z=0.1613, at a projected physical offset of 16 kpc from the galaxy's center. We
present X-ray, optical/nIR and radio observations of its counterpart and model
them with two distinct components of emission: a standard afterglow, arising
from the interaction of the relativistic jet with the surrounding medium, and a
kilonova, powered by the radioactive decay of the sub-relativistic ejecta.
Broadband modeling of the afterglow data reveals a weak reverse shock
propagating backward into the jet, and a likely jet-break at 3.5 d. This is
consistent with a structured jet seen slightly off-axis while expanding into a
low-density medium. Analysis of the kilonova properties suggests a rapid
evolution toward red colors, similar to AT2017gfo, and a low nIR luminosity,
possibly due to the presence of a long-lived neutron star. The global
properties of the environment, the inferred low mass (M_ej < 0.006 Msun) and
velocities (v > 0.05 c) of lanthanide-rich ejecta are consistent with a binary
neutron star merger progenitor.Comment: 14 pages, 6 figures, MNRAS, in press. Moderate revision, added Figure
5 and X-ray data to Table
Bovine lactoferrin and lactoferrin-derived peptides inhibit the growth of Vibrio cholerae and other Vibrio species
Bovine lactoferrin and lactoferrin-derived peptides inhibit the growth of Vibrio cholerae and other Vibrio species
Strangeness, Charm and Beauty in Quark Matter: SQM 2007 Experimental Overview
This paper aims at providing an experimental overview of the Strangeness in
Quark Matter 2007 ConferenceComment: Proceedings of Strangeness in Quark Matter 2007, submitted to Journal
of Physics
Efecto antiproliferativo renal del enalaprilato
Introducción: El enalapril es conocido por su efecto antiproliferativo, al inhibir la Enzima de Conversión de la Angiotensina I (IECA). Revierte efectos renales de la angiotensina II entre ellos la hiperfiltración glomerular pudiendo prevenir la esclerosis. Objetivo: Analizar efecto antiproliferativo del enalaprilato en modelo renal de esclerosis en ratas wistar. Material y Métodos: 20 ratas wistar fueron divididas en 4 grupos de 5. Grupo1: tratado con enalaprilato luego de nefrectomÃa. Grupo 2: enalaprilato previo a la nefrectomÃa. Grupo 3: nefrectomÃa sin tratamiento. Grupo 4: enalaprilato sin nefrectomÃa. Dosis fue de 60 mg/Kg/dÃa por cánula orogástrica por 1 mes. Ratas fueron sacrificadas tomándose muestras histológicas de los riñones. Fueron evaluados tamaño y peso del riñón y estadificación por grado de la lesión glomerular. Los datos se muestran en promedio y DE, y por frecuencia y porcentaje. Resultados: 87% de las ratas sobrevivieron a la nefrectomÃa. El promedio general del tamaño renal fue de 20x10 mm y el peso renal del G1: 1,6 ±0. 1g; G2: 1,7±0,5g; G3:2,0±0,2g y G4:1,7±0,1g. El grado máximo de glomeruloesclerosis fue grado 1(expansión mensagial/ engrosamiento de la membrana basal y/o irregularidades de las luces de los capilares); el G1 presentó 50% de afectación, G2 presentó 25 %, G3 mostró 60% y G4 sin afectación glomerular. Conclusión: El enalaprilato previene el grado de glomeruloesclerosis en el grupo G2 demostrando que administrado antes de la nefrectomÃa la evolución de la esclerosis disminuye en relación al G1 y G3.Con esto podemos probar el efecto antiproliferativo del IECA
Observation of a New Charmed Strange Meson
Using the CLEO-II detector, we have obtained evidence for a new meson
decaying to . Its mass is
{}~MeV/ and its width is ~MeV/. Although we do not
establish its spin and parity, the new meson is consistent with predictions for
an , , charmed strange state.Comment: 9 pages uuencoded compressed postscript (process with uudecode then
gunzip). hardcopies with figures can be obtained by sending mail to:
[email protected]
Precision Measurement of the Mass Difference
We have measured the vector-pseudoscalar mass splitting , significantly more precise than the previous
world average. We minimize the systematic errors by also measuring the
vector-pseudoscalar mass difference using the radiative
decay , obtaining
. This is
then combined with our previous high-precision measurement of
, which used the decay . We also
measure the mass difference MeV, using the
decay modes of the and mesons.Comment: 18 pages uuencoded compressed postscript (process with uudecode then
gunzip). hardcopies with figures can be obtained by sending mail to:
[email protected]
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