407 research outputs found
Limitation of Actions - Nature, Validity, Construction - Unconstitutional Deprivation of Remedy
Response to a comment on Dessert et al. "The dark matter interpretation of the 3.5 keV line is inconsistent with blank-sky observations"
The dark matter explanation of the 3.5 keV line is strongly disfavored by our
work in Dessert et al. 2020. Boyarsky et al. 2020 questions that conclusion:
modeling additional background lines is claimed to weaken the limit
sufficiently to re-allow a dark matter interpretation. We respond as follows.
1) A more conservative limit is obtained by modeling additional lines; this
point appeared in its entirety in our work in Dessert et al., though we also
showed that the inclusion of such lines is not necessary. 2) Despite
suggestions in Boyarsky et al., even the more conservative limits strongly
disfavor a decaying dark matter origin of the 3.5 keV line.Comment: 7 pages, 1 figure, response to technical comment solicited by
Science. Version published in PDU. Full analysis available at
https://github.com/bsafdi/BlankSkyfor3p
Editorial Board
This nursery was organized in response to the need for improving adaptation and obtaining genetic information on the resistance or reaction to the different stress environments (biotic and abiotic) to which beans are subjected in production areas. Results are given for the best black- and red-seeded lines of the 1987 VIDAC, covering characteristics such as 100 seeds, days to flowering and physiological maturity, wt. of and response to diseases such as rust (Uromyces phaseoli), bacterioses (Xanthomonas phaseoli), BGMV, and web blight (Thanatephorus cucumeris). The yield potential and genetic adaptation of the best materials over different sites are also analyzed. Information on these national and regional trials should be collected in an efficient regional information and documentation center. (CIAT)Este vivero se organizo con base en la necesidad de conseguir una mejor adaptacion e informacion genetica sobre la resistencia o la reaccion a los diferentes ambientes de estres (bioticos o abioticos) a los cuales se somete el frijol en las areas de produccion. Se presentan los resultados de las mejores lineas de semilla negra y semilla roja de los VIDAC de 1987, para las caracteristicas de peso de 100 semillas, dias a floracion y a madurez fisiologica, y respuesta a enfermedades como roya (Uromyces phaseoli), bacteriosis (Xanthomonas phaseoli), BGMV y mustia hilachosa (Thanathephorus cucumeris). Tambien, se examinan el potencial de rendimiento y la adaptacion genetica de los mejores materiales en diferentes sitios. Es necesario reunir gran cantidad de informacion sobre estos ensayos nacionales y regionales en un centro de informacion y documentacion regional eficiente. (CIAT
Taller Regional de Mejoramiento de Frijol: el manejo práctico de programas de mejoramiento
Programa Cooperativo Regional de Frijol para Centroamérica, México y el Caribe (PROFRIJOL)UCR::VicerrectorÃa de Investigación::Unidades de Investigación::Ciencias Agroalimentarias::Estación Experimental AgrÃcola Fabio Baudrit Moreno (EEAFBM
X-ray Searches for Axions from Super Star Clusters
Axions may be produced in abundance inside stellar cores and then convert
into observable X-rays in the Galactic magnetic fields. We focus on the
Quintuplet and Westerlund 1 super star clusters, which host large numbers of
hot, young stars including Wolf-Rayet stars; these stars produce axions
efficiently through the axion-photon coupling. We use Galactic magnetic field
models to calculate the expected X-ray flux locally from axions emitted from
these clusters. We then combine the axion model predictions with archival
Nuclear Spectroscopic Telescope Array (NuSTAR) data from 10 - 80 keV to search
for evidence of axions. We find no significant evidence for axions and
constrain the axion-photon coupling GeV for masses eV at 95\%
confidence.Comment: 8+18 pages, 3+21 figures, version published in PRL. Supplementary
Data at https://github.com/bsafdi/axionSS
Evidence against the decaying dark matter interpretation of the 3.5 keV line from blank sky observations
X-ray observations of nearby clusters and galaxies have reported an
unexpected X-ray line around 3.5 keV. This line has received significant
attention due to its possible explanation through decaying dark matter; in
particular, decaying sterile neutrino models, with a sterile neutrino mass
around 7 keV, provide a good fit to the available data. We use over 30 Ms of
XMM-Newton blank-sky observations to search for evidence of the 3.5 keV line
consistent with arising from decaying dark matter within the ambient halo of
the Milky Way. We find the strongest limits to-date on the lifetime of dark
matter in this mass range, strongly disfavoring the possibility that the 3.5
keV line originates from dark matter decay.Comment: 6+13 pages, 3 + 11 figure
- …