1,851 research outputs found
Audre Lorde, una memoria plástica para estallar la diferencia
What name should we give to those narratives that construct knowledge from the exposition of an experience that is both personal and deeply collective?
In this text I want to re-read Audre Lorde in the light of the concept of plastic memories, which arises from a triple conjunction between the autobiographical writings set up by black and Chicano authors and poets of the 70s and 80s of the 20th century in the United States. Idea of plasticity developed by Catherine Malabou and the concept of figuration articulated by Rosi Braidotti.
A plastic memory is capable of blowing the dominant mandates of gender, race and sexuality, highlighting their silences. A plastic memory is a reappropriaΩtion of the negated word, a trembling that crosses the fictional routes of our imaginary, in an attempt to value new ways of saying and thinking what happens beyond the limits of the great lanterns of history.¿Qué nombre deberíamos darle a esas narraciones que construyen conocimiento desde la exposición de una experiencia que es al mismo tiempo personal y profundamente colectiva?
En este texto quiero releer a Audre Lorde a la luz del concepto de memorias plásticas, que surge de una triple conjunción entre las escrituras autobiográficas puestas en marcha por autoras y poetas negras y chicanas de los años 70 y 80 del siglo XX en EEUU, la idea de plasticidad desarrollada por Catherine Malabou y el concepto de figuración articulado por la filósofa Rosi Braidotti.
Las memorias plásticas surgen de la mano de aquellas formas de escritura autobiográfica que buscan hacer estallar los mandatos dominantes del género, la raza
y la sexualidad, poniendo en evidencia sus silencios. Una memoria plástica es una reapropiación de la palabra desde la que se desenvuelven distintos intentos por
valorar historias descorridas de los horizontes normativos
Strong Clustering of Lyman Break Galaxies around Luminous Quasars at z~4
In the standard picture of structure formation, the first massive galaxies
are expected to form at the highest peaks of the density field, which
constitute the cores of massive proto-clusters. Luminous quasars (QSOs) at z~4
are the most strongly clustered population known, and should thus reside in
massive dark matter halos surrounded by large overdensities of galaxies,
implying a strong QSO-galaxy cross-correlation function. We observed six z~4
QSO fields with VLT/FORS exploiting a novel set of narrow band filters custom
designed to select Lyman Break Galaxies (LBGs) in a thin redshift slice of
Delta_z~0.3, mitigating the projection effects that have limited the
sensitivity of previous searches for galaxies around z>~4 QSOs. We find that
LBGs are strongly clustered around QSOs, and present the first measurement of
the QSO-LBG cross-correlation function at z~4, on scales of 0.1<~R<~9 Mpc/h
(comoving). Assuming a power law form for the cross-correlation function
xi=(r/r0_QG)^gamma, we measure r0_QG=8.83^{+1.39}_{-1.51} Mpc/h for a fixed
slope of gamma=2.0. This result is in agreement with the expected
cross-correlation length deduced from measurements of the QSO and LBG
auto-correlation function, and assuming a linear bias model. We also measure a
strong auto-correlation of LBGs in our QSO fields finding
r0_GG=21.59^{+1.72}_{-1.69} Mpc/h for a fixed slope of gamma=1.5, which is ~4
times larger than the LBG auto-correlation length in random fields, providing
further evidence that QSOs reside in overdensities of LBGs. Our results
qualitatively support a picture where luminous QSOs inhabit exceptionally
massive (M_halo>10^12 M_sun) dark matter halos at z~4.Comment: 25 pages, 22 figures, submitted to the Ap
Clustering of Lyman-alpha Emitters Around Quasars at
The strong observed clustering of quasars indicates they are hosted
by massive () dark matter
halos. Assuming quasars and galaxies trace the same large-scale structures,
this should also manifest as strong clustering of galaxies around quasars.
Previous work on high-redshift quasar environments, mostly focused at ,
have failed to find convincing evidence for these overdensities. Here we
conduct a survey for Lyman alpha emitters (LAEs) in the environs of 17 quasars
at probing scales of . We measure an
average LAE overdensity around quasars of 1.4 for our full sample, which we
quantify by fitting the quasar-LAE cross-correlation function. We find
consistency with a power-law shape with correlation length of
for a fixed slope of
. We also measure the LAE auto-correlation length and find
\,cMpc (), which is
times higher than the value measured in blank fields. Taken together our
results clearly indicate that LAEs are significantly clustered around
quasars. We compare the observed clustering with the expectation from a
deterministic bias model, whereby LAEs and quasars probe the same underlying
dark matter overdensities, and find that our measurements fall short of the
predicted overdensities by a factor of 2.1. We discuss possible explanations
for this discrepancy including large-scale quenching or the presence of excess
dust in galaxies near quasars. Finally, the large cosmic variance from
field-to-field observed in our sample (10/17 fields are actually underdense)
cautions one from over-interpreting studies of quasar environments
based on a single or handful of quasar fields.Comment: 19 pages, 12 figures, submitted to the Ap
Squark Loop Correction to W^{+-} H^{-+} Associated Hadroproduction
We study the squark loop correction to W^{+-} H^{-+} associated
hadroproduction via gluon-gluon fusion within the minimal supersymmetric
extension of the standard model. We list full analytic results and
quantitatively analyze the resulting shift in the cross section at the CERN
Large Hadron Collider assuming a supergravity-inspired scenario.Comment: 13 pages (Latex), 5 figures (Postscript
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