Pour une sociologie du multi-engagement

Combes, Hélène

doi:10.7202/039263ar

Cited by 8 publications

(1 citation statement)

References 22 publications

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“…this is a criterion to "blow away" the gas rather than just a "blow out" where f g is the gas fraction of the host and σ is the stellar velocity dispersion, a measure of the depth of the gravitational potential well. In our sample galaxies, f g 0.1 on average, although there is considerable scatter among ULIRGs (e.g., Downes & Solomon 1998;Combes et al 2013 and references therein), while σ ranges from ∼120 to ∼280 km s −1 with an average value of ∼200 km s −1 (as mentioned in §4.4 of V13b, this value can be considered a lower limit, Rothberg & Fischer 2010;Rothberg et al 2013). The steep dependence of L M on σ implies that L break AGN 2 -100% of L M , with an average value of ∼10%, i.e.…”

Section: Discussionmentioning

confidence: 82%

Powerful Molecular Outflows in Nearby Active Galaxies

Veilleux

Meléndez

2013

Proc. IAU

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Abstract. We report the results from a systematic search for molecular (OH 119 μm) outflows with Herschel-PACS † in a sample of 43 nearby (z < 0.3) galaxy mergers, mostly ultraluminous infrared galaxies (ULIRGs) and QSOs. We find that the character of the OH feature (strength of the absorption relative to the emission) correlates with that of the 9.7-μm silicate feature, a measure of obscuration in ULIRGs. Unambiguous evidence for molecular outflows, based on the detection of OH absorption profiles with median velocities more blueshifted than −50 km s −1 , is seen in 26 (70%) of the 37 OH-detected targets, suggesting a wide-angle (∼145• ) outflow geometry. Conversely, unambiguous evidence for molecular inflows, based on the detection of OH absorption profiles with median velocities more redshifted than +50 km s −1 , is seen in only 4 objects, suggesting a planar or filamentary geometry for the inflowing gas. Terminal outflow velocities of ∼ −1000 km s −1 are measured in several objects, but median outflow velocities are typically ∼ −200 km s −1 . While the outflow velocities show no statistically significant dependence on the star formation rate, they are distinctly more blueshifted among systems with large AGN fractions and luminosities [log (LAGN /L ) 11.8±0.3]. The quasars in these systems play a dominant role in driving the molecular outflows. In contrast, the most AGN dominated systems, where OH is seen purely in emission, show relatively modest OH line widths, despite their large AGN luminosities, perhaps indicating that molecular outflows subside once the quasar has cleared a path through the obscuring material.

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Section: Discussionmentioning

confidence: 82%

Powerful Molecular Outflows in Nearby Active Galaxies

Veilleux

Meléndez

2013

Proc. IAU

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Movimentos sociais em interação com partidos políticos: a experiência do movimento ambientalista com o Partido dos Trabalhadores

Oliveira

2021

Opin. Publica

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Resumo O objetivo deste artigo é aproximar analiticamente duas literaturas que geralmente caminharam apartadas: a de movimentos sociais e a de partidos políticos. Propomos um debate sobre os processos de formação de identidade coletiva e de identidade partidária junto com elementos que definem a escolha de estratégia dos movimentos sociais e dos partidos políticos. Argumentamos que questões de identidade e de estratégia terão peso importante para estabelecer as interações entre movimentos sociais e partidos políticos e que tais interações podem ocorrer a partir da intermediação de lideranças sociopartidárias influentes tanto no campo social quanto no partidário. A discussão teórica foi desenvolvida com base em estudo de caso que observou a articulação de líderes do movimento ambientalista com partidos políticos, especialmente com o Partido dos Trabalhadores, desde a década de 1980 até o processo de formação da Rede Sustentabilidade. A intermediação da líder Marina Silva entre mundo social e mundo partidário foi fundamental para que lideranças do movimento ambientalista adentrassem os partidos políticos e suas arenas: legislativa, governamental e eleitoral. Concluímos que a relação prévia do movimento ambientalista com o Partido dos Trabalhadores foi crucial para a decisão de ambientalistas se engajarem na formação de um novo partido, a Rede Sustentabilidade.

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Un parti en quête de relais

Argibay¹

2014

Genèses

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Cet article porte sur la manière dont les relations entre le Parti socialiste (PS) et les organisations étudiantes se sont forgées. Ces différentes structures ne sont pas ici envisagées comme des entités à part entière mais comme des collectifs d’individus. C’est la multipositionnalité de l’engagement des jeunes militants qui, via le recours à l’analyse de réseaux, permet de saisir l’établissement de liens entre deux espaces sociaux qui étaient déconnectés dans les années 1960. Ce processus peut être décomposé en trois temps : un premier, au cours duquel quelques militants d’un courant minoritaire du PS investissent la Mutuelle nationale des étudiants de France (MNEF) pour s’offrir des relais auprès des étudiants ; un deuxième, marqué par l’engagement délibéré de la direction du parti avec la création d’organisations spécifiques pilotées par un petit groupe de militants ; le troisième est celui de l’institutionnalisation des relations en ce sens qu’elles vont survivre au départ des fondateurs.

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Pour une sociologie du multi-engagement

Cited by 8 publications

References 22 publications

Powerful Molecular Outflows in Nearby Active Galaxies

Powerful Molecular Outflows in Nearby Active Galaxies

Movimentos sociais em interação com partidos políticos: a experiência do movimento ambientalista com o Partido dos Trabalhadores

Un parti en quête de relais

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