3 research outputs found
Le tumulus de Renongar en Plovan (Finistère). Etude d'une fouille ancienne de Paul Du Chatellier
No full textThe monument of Renongar at Plovan (Finistère) is a megalithic complex excavated by the finisterian
archaeologist Paul Du Chatellier in the last century but which has not been fully published.
This monument procured an important material includingone of the most important assemblages of Kerugou ware.
One of the orthostats was carved on both sides and the design shows that it may be a decorated menhir re-used as a slab.
From the ceramic material, the author studies the relations between Groh-Collé ware and Kerugou ware in south Finistère.Le monument de Renongar en Plovan (Finistère) est un ensemble de chambres compartimentées qui a été fouillé par l'archéologue finistérien Paul Du Chatellier au siècle dernier mais n'a jamais été entièrement publié. Ce monument a donné un important mobilier et constitue l'un des plus importants ensembles céramiques de style Kerugou. Il comportait aussi une dalle ornée des deux côtés dont l'étude permet de montrer qu'elle était en position de réutilisation.
A partir de ce mobilier, l'auteur réexamine les relations du style de Groh-Collé avec le style de Kerugou dans le Finistère sud.Polles Ronan. Le tumulus de Renongar en Plovan (Finistère). Etude d'une fouille ancienne de Paul Du Chatellier. In: Revue archéologique de l'ouest, tome 10, 1993. pp. 33-53
Le tumulus de Renongar en Plovan (Finistère). Etude d'une fouille ancienne de Paul Du Chatellier
No full textThe monument of Renongar at Plovan (Finistère) is a megalithic complex excavated by the finisterian
archaeologist Paul Du Chatellier in the last century but which has not been fully published.
This monument procured an important material includingone of the most important assemblages of Kerugou ware.
One of the orthostats was carved on both sides and the design shows that it may be a decorated menhir re-used as a slab.
From the ceramic material, the author studies the relations between Groh-Collé ware and Kerugou ware in south Finistère.</jats:p
An Hα–X-ray surface-brightness correlation for filaments in cooling-flow clusters
No full textMassive galaxies in cooling-flow clusters display clear evidence of feedback from active galactic nuclei (AGNs). Joint X-ray and radio observations have shown that AGN radio jets push aside the surrounding hot gas and form cavities in the hot intracluster medium (ICM). These systems host complex, kiloparsec-scale, multiphase filamentary structures, from warm and ionized (10,000 K) to cold and molecular (<100 K). These striking clumpy filaments are believed to be a natural outcome of thermally unstable cooling from the hot ICM, probably triggered by feedback processes while contributing to feeding the AGN via chaotic cold accretion (CCA). However, the detailed constraints on the formation mechanism of the filaments are still uncertain, and the connection between the different gas phases has to be fully unveiled. By leveraging a sample of seven X-ray-bright cooling-flow clusters, we have discovered a tight positive correlation between the X-ray surface brightness and the Hα surface brightness of the filaments over two orders of magnitude, as also found in stripped tails. We further show the quantitative consistency of such a relation with CCA predictions by leveraging hydrodynamical simulations. This discovery provides evidence for a shared excitation mechanism between hot and warm filaments, where multiphase condensation, triggered by AGN feedback, drives their tight co-evolution. © The Author(s), under exclusive licence to Springer Nature Limited 2025V.O. acknowledges support from DICYT through grant 1757 Comité
Mixto-ESO Chile, and NASA NPP funding. V.O. and Y.S. were
supported by NSF grant 2107711, Chandra X-ray Observatory grants
GO1-22126X 23120X GO2-23120X and NASA grant 80NSSC21K0714.
M.G. acknowledges support from the ERC Consolidator Grant
BlackHoleWeather (101086804). M.-L.G.-M. acknowledges financial
support from the grant CEX2021-001131-S funded by MCIU/AEI/
10.13039/501100011033, from the coordination of the participation
in SKA-SPAIN, funded by the Ministry of Science, Innovation and
Universities (MCIU), and from NSERC via the Discovery grant
programme and the Canada Research Chair programme. This
research has made use of software provided by the Chandra X-ray
Center (CXC) in the CIAO application packages. It was based
on observations collected at the European Organisation for
Astronomical Research in the Southern Hemisphere under ESO
programmes 60.A-9312(A), 0103.A-0447(A) and 094.A-0859(A).With funding from the Spanish government through the "Severo Ochoa Centre of Excellence" accreditation (CEX2021-001131-S).Peer reviewe
