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Pellerin, Louise

doi:10.1023/a:1015044200567

Cited by 138 publications

(22 citation statements)

References 107 publications

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“…Since FUV stellar flux is produced only by O and B stars, a small change in their relative numbers can affect the derived IMF slope. This result cannot be associated with a bias due to the FUV synthesis since several, and bigger, young populations have been studied with the same technique and did not show such a flat slope ( Pellerin 2004).…”

Section: The Flat Imf Slope Of Gehrsmentioning

confidence: 88%

“…A new FUV spectral library based on FUSE data has recently been added to the spectral synthesis code LavalSB (Robert et al 2003). This code has proved to be very powerful for young stellar populations ( Pellerin 2004) and is used in the present work to deduce the global properties of massive stars in GEHRs from their integrated FUV light. LavalSB is a parallel version of Starburst99 .…”

Section: Stellar Population Modeling In the Fuvmentioning

confidence: 99%

“…Consequently, stellar lines of O vi and S iv are not used in the present work, since C iii and P v lines alone provide more accurate results. An extensive identification of stellar and interstellar lines contained within the FUSE range can be found in Robert et al (2003) and Pellerin et al (2002).…”

Section: Stellar Population Modeling In the Fuvmentioning

confidence: 99%

“…They produce the most massive stellar types known (O, B, and Wolf-Rayet [W-R]) that have the potential to transform the morphological and chemical aspects of galaxies through their feedback (e.g., Heckman et al 1990;Martin et al 2002;Tremonti et al 2004;Calzetti et al 2004). Most GEHRs are recent and quasi-instantaneous events of star formation (Mas-Hesse & Kunth 1991Schaerer et al 1999;Stasińska & Schaerer 1999), as seems to be the case for a starburst, in the sense that most of their massive stars seem to form within less than 2-3 Myr (Pellerin 2004).…”

Section: Introductionmentioning

confidence: 99%

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Massive Stellar Content of Giant HiiRegions in M33 and M101

Pellerin

2006

Astron J

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Far-ultraviolet (900-1200 8) spectral synthesis of nine giant extragalactic H ii regions in M33 and M101 is performed to study their massive stellar content. Several parameters are quantified, predicted, and compared to the literature: age, stellar mass, initial mass function ( IMF) slope, number of O-type and Wolf-Rayet stars, and H and 5500 8 continuum fluxes. The results of this particular technique are consistent with other methods and observations. This work shows that a total stellar mass of a few 10 3 M is needed to populate the IMF bins well enough at high masses to obtain accurate results from the spectral synthesis technique in the far-ultraviolet. A flat IMF slope seems to characterize better the stellar line profiles of these objects, which is likely the first sign of a small number statistics effect on the IMF. Finally, the H ii region NGC 5461 is identified as a good candidate for hosting a second generation of stars, not yet seen at far-ultraviolet wavelengths.

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Section: The Flat Imf Slope Of Gehrsmentioning

confidence: 88%

Section: Stellar Population Modeling In the Fuvmentioning

confidence: 99%

Section: Stellar Population Modeling In the Fuvmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Massive Stellar Content of Giant HiiRegions in M33 and M101

Pellerin

2006

Astron J

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“…Greenhouse and Harris 1983;Matias et al 1994;Nobes 1996;Pellerin 2002). Very often waste disposal studies are performed by combining two or more geophysical methods (Soupios et al 2007b).…”

Section: Introductionmentioning

confidence: 99%

Evidence for an underground runoff and soil permeability at the Ouled Fayet (Algiers, Algeria) subsurface landfill pilot project from geophysical investigations

Djadia

Machane²,

Chatelain

et al. 2009

Environ Earth Sci

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International audienceResults from geophysical investigations (electrical resistivity, electromagnetic mapping and seismic refraction) on an excavated cell of the Ouled Fayet (Algiers, Algeria) pilot landfill indicated the presence of an underground runoff and permeable soil underneath the cell. These results contradict those obtained by a feasibility study, based, however, only on the analysis of seventy-six 10-m drilling cores. The 1D boreholes information has been proven to be insufficient and to give biased results. The presence of water at depth is evidenced by lower resistivity, high conductivity anomalies and increase of P-wave velocity. Thus, to the contrary of what is claimed in the feasibility study, a threat of leachate pollution is real. This study shows that landfill construction studies cannot give trustful results without geophysical investigations. More specifically, in Algeria, it is imperative to elaborate a landfill construction code, which should include mandatory geophysical prospecting and deeper drilling cores

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Geophysical and Archaeological Characterization of a Modest Roman Villa: Methodological Considerations about Progressive Feedback Analyses in Sites with Low Geophysical Contrast

Anchuela

Blasco

Benito

et al. 2015

Archaeological Prospection

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The low contrast in physical properties of archaeological elements compared to the host soil is a common drawback in geophysical surveys applied to subtle archaeological sites because those contrasts are usually what are being measured by most instruments. Furthermore, when archaeological elements and construction remains are placed within the same package of materials, differentiation of each can make the interpretation of geophysical data sometimes difficult. In this work we propose a dynamic, integrated approach for the characterization of an archaeological site with simple Roman construction materials in order to evaluate methodological considerations in the evaluation of this kind of sites. This approach includes: (i) a preliminary evaluation of construction material characteristics, according to the background provided by the historical and geographical context and from previous excavations, (ii) measurements of magnetic susceptibility of archaeological and natural materials in the site for direct modelling of the expected anomalies; (iii) a geophysical survey including magnetometry, multifrequency electromagnetic (EM) method and ground penetrating radar (GPR) (100, 250 and 500 MHz centre frequency antennas); (iv) geophysical data evaluation for planning subsequent systematic surveys; (v) dynamic interpretation of geophysical results through careful data evaluation of all previous steps. The final archaeological model from geophysical data has been successful due to the manner of data interpretation looking for orthogonal patterns of geophysical anomalies that were hypothesized to be subsurface walls. Modelling was then followed by archaeological excavations consisting of three trenches where the walls were exposed. The integration of geophysical data with excavations has permitted to evaluate significance of the different geophysical analysis and to identify their archaeological meaning. The proposed sequential methodology represents an innovative manner of analysis (i) in subtle sites where construction remains are scarce and the absence of well‐defined geophysical contrasts can limit the results of usual surveys and (ii) to increase the efficiency in the evaluation of more extensive survey areas. Copyright © 2015 John Wiley & Sons, Ltd.

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Untitled

Cited by 138 publications

References 107 publications

Massive Stellar Content of Giant HiiRegions in M33 and M101

Massive Stellar Content of Giant HiiRegions in M33 and M101

Evidence for an underground runoff and soil permeability at the Ouled Fayet (Algiers, Algeria) subsurface landfill pilot project from geophysical investigations

Geophysical and Archaeological Characterization of a Modest Roman Villa: Methodological Considerations about Progressive Feedback Analyses in Sites with Low Geophysical Contrast

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