331 research outputs found
Feedback from intra-cluster supernovae on the ICM in cooling flow galaxy clusters
No full textWe study the effect of heating and metal enrichment from supernovae (SNe) residing between galaxies on the Intra-Cluster Medium (ICM). Recent observations indicate that a considerable fraction ( ̃20%) of the SN Ia parent stellar population in galaxy clusters is intergalactic. By considering their effect on the relaxed progenitors of cooling flow clusters we propose that intra-cluster SNe can act as a distributed heating source which may influence the initial stages of the formation of cooling flows. We investigate the increase in cooling time as a function of the energy input supplied by SNe and their assumed spatial distribution, and conclude that intra-cluster SNe represent a heating source which in some clusters can cause a delay of the formation of cooling flows. This would imply that some cooling flows are younger than previously thought. We also discuss the impact that a large population of intra-cluster SNe could have on the chemical evolution of the ICM in cooling flow clusters
2D velocity fields of simulated interacting disc galaxies
No full textWe investigate distortions in the velocity fields of disc
galaxies and their use in revealing the dynamical state of
interacting galaxies at different redshifts. We model disc galaxies
in combined N-body/hydrodynamic simulations. 2D velocity fields of
the gas are extracted, which we place at different redshifts from
to to investigate resolution effects on the properties
of the velocity field. To quantify the structure of the velocity
field we also perform a kinemetry analysis. If the galaxy is
undisturbed we find that the rotation curve extracted from the 2D
field agrees well with long-slit rotation curves. This is not true
for interacting systems, as the kinematic axis is not well defined
and in general does not coincide with the photometric axis of the
system. For large (Milky way type) galaxies we find that distortions
are still visible at intermediate redshifts but are partly smeared
out. Thus a careful analysis of the velocity field is necessary
before using it for a Tully-Fisher study. For small galaxies (disc
scale length ~2 kpc) even strong distortions are not visible
in the velocity field at with currently available
angular resolution. Therefore we conclude that current distant
Tully-Fisher studies cannot give reliable results for low-mass
systems. Additionally we confirm the power of near-infrared integral
field spectrometers in combination with adaptive optics (such as
SINFONI) to study velocity fields of galaxies at high redshift
().
Internal kinematics of isolated modelled disc galaxies
No full textWe present a systematic investigation of rotation curves
(RCs) of fully hydrodynamically simulated galaxies, including
cooling, star formation with associated feedback, and galactic
winds. Applying two commonly used fitting formulae to characterize
the RCs, we investigated systematic effects on the shape of RCs
by both the observational constraints and internal properties of the
galaxies. We mainly focused on effects that occur in measurements of
intermediate and high redshift galaxies. We found that RC
parameters are affected by the observational setup, like slit
misalignment or the spatial resolution and that they also depend on the
evolution of a galaxy. Therefore, a direct comparison of
quantities derived from measured RCs with predictions of
semi-analytic models is difficult. The virial velocity
, which is usually calculated and used by
semi-analytic models, can differ significantly from fit parameters
like or inferred from RCs. We found
that is usually lower than typical characteristic
velocities derived from RCs. alone is in general
not a robust estimator of the virial mass
Internal kinematics of modelled interacting disc galaxies
No full textWe present an investigation of galaxy-galaxy
interactions and their effects on the velocity fields of disc
galaxies in combined N-body/hydrodynamic simulations, which
include cooling, star formation with feedback, and galactic winds.
Rotation curves (RCs) of the gas are extracted from these
simulations in a way that follows the procedure applied to
observations of distant, small, and faint galaxies as closely as
possible. We show that galaxy-galaxy mergers and fly-bys disturb
the velocity fields significantly and hence the RCs of the
interacting galaxies, leading to asymmetries and distortions in
the RCs. Typical features of disturbed kinematics are
significantly rising or falling profiles in the direction of the
companion galaxy and pronounced bumps in the RCs. In addition,
tidal tails can leave strong imprints on the rotation curve. All
these features are observable for intermediate redshift galaxies,
on which we focus our investigations. We use a quantitative
measure for the asymmetry of rotation curves to show that the
appearance of these distortions strongly depends on the viewing
angle. We also find in this way that the velocity fields settle
back into relatively undisturbed equilibrium states after unequal
mass mergers and fly-bys. About 1 Gyr after the first encounter,
the RCs show no severe distortions anymore. These results are
consistent with previous theoretical and observational studies. As
an illustration of our results, we compare our simulated velocity
fields and direct images with rotation curves from VLT/FORS
spectroscopy and ACS images of a cluster at and find
remarkable similarities.
Les disparitions de Mourmelon. Origine et interprétation des rumeurs
No full textJean Noël Kapferer : Die Verschwundenen von Mourmelon. Ursprung und Auslegung der Gerüchte.
Seit Januar 1980 sind mehrere Wehrpflichtige in der Nähe der Truppenlager Mourmelon verschwunden. Diese Erscheinungen gaben zu Gerüchten Anlass. Im vorliegenden Aufsatz untersucht der Verfasser den Inhalt dieser Gerüchte aus dem Gesichtswinkel der in ihnen erscheinenden Stereotypen, der Archetypen, auf die sie sich beziehen, und ihrer sozialen Funktion. Er prüft, warum gewisse Behauptungen als Erklärung zu diesem wiederholten Verschwmden zu öffentlichen Geruchten werden und warum ander,. zunächst ebenso plausibel, nicht zu Geruchten werden können.Jean-Noël Kapferer : The disappearances of Mourmelon. Origins and interpretation of rumours.
Since January 1980, a number of soldiers have disappeared from an area close to the military camp of Mourmelon. These disappearances have generated rumours. In this paper, the author analyzes the content of the rumours : the stereotypes they convey, the archetypes they refer to, and their social function. He also examines why several hypothesis explaining the disappearances are rumoured and others, quite as plausible a priori, cannot go round.Depuis janvier 1980, plusieurs appelés du contingent ont disparu dans la proximité du camp militaire de Mourmelon. Ces disparitions ont suscité des rumeurs. Dans cet article, l'auteur analyse le contenu de celles-ci sous l'angle des stéréotypes qu'elles véhiculent, des archétypes auxquels elles renvoient et de leur fonction sociale. Il examine pourquoi certaines thèses expliquant les disparitions sont colportées par la rumeur et pourquoi d'autres, tout aussi plausibles a priori, ne peuvent circuler.Jean-Noël Kapferer : Las desapariciones de Mourmelon. Origen e interpretation de los rumores.
Desde el mes de Enero de 1980, varios reclutas del contingente desparacierón en las cercanias del cuartel militar de Mourmelon. Estas desapariciones suscitaron rumores. En este articulo, el autor analiza el contenido de estas, bajo el ángulo de estereotipos que vehiculan unos arquetipos a las cuales devuelven su función social. Asi mismo, explica porqué ciertas tesis, explicando las desapariciones, son divulgadas por el rumor y porqué otras, asi mismo, probables, no pueden circular.Kapferer Jean-Noël. Les disparitions de Mourmelon. Origine et interprétation des rumeurs. In: Revue française de sociologie, 1989, 30-1. pp. 81-89
Enrichment of the ICM of galaxy clusters due to ram-pressure stripping
No full textWe investigate the impact of galactic mass loss
triggered by ram-pressure stripping of cluster galaxies on the evolution of the
intra-cluster medium (ICM).
We use combined N-body and hydrodynamic simulations together with a phenomenological galaxy formation model and a prescription of the effect of ram-pressure stripping on the galaxies. We analyze the effect of galaxy – ICM interaction for different model clusters with different
masses and different merger histories.
Our simulations show that ram-pressure stripping can account for
~10% of the overall observed level of enrichment in the ICM
within a radius of 1.3 Mpc. The efficiency of metal ejection of cluster galaxies depends in the first few Gyr of the simulation mainly on the cluster mass and is significantly increased
during major merger events. Additionally we show that ram-pressure
stripping is most efficient in the center of the galaxy cluster and the level of enrichment drops quite fast at larger radii. We present emission-weighted metallicity maps of the
ICM which can be compared with X-ray observations. The resulting distribution
of metals in the ICM shows a complex pattern with stripes and plumes of metal-rich material.
The metallicity maps can be used to trace the
present and past interactions between the ICM and cluster galaxies
Krystyna Miłobędzka’s Poetic Playground. Around Gdzie baba siała mak. Gry słowne dla teatru
No full textThe article is devoted to Krystyna Miłobędzka’s texts for children’s theatre. Demonstrating the kinship between the characteristic ways of thinking of poet and child, the author analyses how space is created – the space for both child’s play and poetic ritual. Highlighted in the work is the idea of how things are done through the use of clich´es, child’s words and rhymes in poetic language. The main character of Miłobędzka’s scripts is language – its potential and power for [email protected] Nofikow-Dobrodumow, dr, literaturoznawczyni, kulturoznawczyni, adiunkt w Zakładzie Teorii i Antropologii Literatury Uniwersytetu w Białymstoku. Autorka książek: Metafizyczne gospodarstwo Mirona (2001) oraz Polski karnawał. Obrazy obyczajów świątecznych w piśmiennictwie trzech stuleci (od XVII do XIX wieku) (2015). Jej zainteresowania obejmują pogranicza literaturoznawstwa i studiów kulturowych.Wydział Filologiczny. Uniwersytet w BiałymstokuBiałoszewski Miron, Imiesłów, w: M. Białoszewski, Utwory zebrane, t. 2: Teatr Osobny, Warszawa: PIW, 1988, s. 147–150.Borowiec Jarosław, Szare światło. Rozmowy z Krystyną Miłobędzką i Andrzejem Falkiewiczem, Wrocław: Biuro Literackie, 2009.Huizinga Johan, Homo ludens. Zabawa jako źródło kultury, przeł. M. Kurecka, W. Wirpsza, Warszawa: Wydawnictwo Aletheia, 2007.Kałuża Anna, Więcej matki, w: Wielogłos. Krystyna Miłobędzka w recenzjach, szkicach, rozmowach, wybór, oprac. i red. J. Borowiec, Wrocław: Biuro Literackie, 2012, s. 236–241.Kapferer Bruce, Proces rytualny i problem refleksywności w egzorcyzmach syngaleskich, w: Rytuał, dramat, święto, spektakl. Wstęp do teorii widowiska kulturowego, red. J. J. MacAloon, przeł. K. Przyłuska-Urbanowicz, posłowie do wydania polskiego W. Dudzik, Warszawa: Wydawnictwa Uniwersytetu Warszawskiego, 2009, s. 273–313.Karasińska Marta, Gry teatralne KrystynyMiłobędzkiej, w:Wielogłos. Krystyna Miłobędzka w recenzjach, szkicach, rozmowach, wybór, oprac. i red. J. Borowiec,Wrocław: Biuro Literackie, 2012, s. 561–569.Miłobędzka Krystyna, Gdzie baba siała mak. Gry słowne dla teatru, Wrocław: Biuro Literackie, 2012.Miłobędzka Krystyna, W widnokręgu Odmieńca. Teatr, dziecko, kosmogonia, Wrocław: Biuro Literackie, 2008.Pławuszewski Piotr, O trudnej sztuce tłumaczenia świata, w: Wielogłos. Krystyna Miłobędzka w recenzjach, szkicach, rozmowach, wybór, oprac. i red. J. Borowiec, Wrocław: Biuro Literackie, 2012, s. 571–575.Serafinowska Ewa, Gra i zabawa w sztukach KrystynyMiłobędzkiej, w: Wielogłos. Krystyna Miłobędzka w recenzjach, szkicach, rozmowach, wybór, oprac. i red. J. Borowiec, Wrocław: Biuro Literackie, 2012, s. 541–552.Turner Victor, Liminalność i gatunki performatywne, w: Rytuał, dramat, święto, spektakl. Wstęp do teorii widowiska kulturowego, red. J. J. MacAloon, przeł. K. Przyłuska--Urbanowicz, posłowie do wydania polskiego W. Dudzik, Warszawa: Wydawnictwa Uniwersytetu Warszawskiego, 2009, s. 39–74.Wiles David, Przestrzeń święta, w: D. Wiles, Krótka historia przestrzeni teatralnych, przeł. Ł. Zaremba, red. nauk. wydania polskiego W. Dudzik, Warszawa: PWN, 2012, s. 36–90.1128930
Variationen
No full textcomposées et dédiées à son Le Docteur F. Kapferer$hpar J. W. KalliwodaPreisangabe: Pr. 20 gr.Vorlageform der Veröffentlichungsangabe: Leipzig, au Bureau de Musique de C. F. Peter
L’impact des différentes stratégies de changements de noms de marque sur la représentation de la marque et l’attitude des consommateurs.
No full textCette étude cherche à comprendre l’attitude des consommateurs envers les changements de noms de marque en analysant l’évolution de la représentation de la marque, et ce à travers trois stratégies de changements : fusion, substitution et rupture. Un plan expérimental avant- après est appliqué à deux changements de marque réels.This work aims to understand the consumers’ attitude towards the brand names changes by analysing the brand representation evolution through three processes of changeovers: merging, substitution or rupture process. The study uses a before-after experimental design on two real brand changes and shows growing brand representation evolution according to the strategies.name changes; Brand; stratégies; Représentations; changements de noms de marque; Marque; strategies; representation;
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