11 results on '"Le Floc H, E."'
Search Results
2. Trophic interactions between viruses, bacteria and nanoflagellates under various nutrient conditions and simulated climate change
- Author
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Bouvy, M., Bettarel, Y., Bouvier, C., Domaizon, I., Jacquet, S., Le Flocʼh, E., Montanié, H., Mostajir, B., Sime-Ngando, T., Torréton, J. P., Vidussi, F., and Bouvier, T.
- Published
- 2011
- Full Text
- View/download PDF
3. Belowground biodiversity in a Mediterranean landscape: relationships between saprophagous macroarthropod communities and vegetation structure
- Author
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David, J.-F., Devernay, S., Loucougaray, G., and Le Flocʼh, E.
- Published
- 1999
4. The Infra-Red Telescope on board the THESEUS mission
- Author
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Götz, D., Boulade, O., Cordier, B., Le Floc H, E., Pinsard, F., Amiaux, J., Tourrette, T., Basa, S., Vergani, S., Atteia, J. L., Covino, S., Ghirlanda, G., Tanvir, N., Blain, A., O Brien, P., Rossi, A., Stratta, G., Casella, P. G., Bozzo, E., Tenzer, C., Piotr Orleanski, Amati, L., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)
- Subjects
methods and techniques ,Astr. instrumentation ,Astrophysics::High Energy Astrophysical Phenomena ,Cosmology: early Universe ,Astrophysics::Instrumentation and Methods for Astrophysics ,Galaxies: high-redshift ,FOS: Physical sciences ,Gamma-ray burst: general ,Instrumentation: spectrographs ,Astrophysics::Cosmology and Extragalactic Astrophysics ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Astrophysics - Instrumentation and Methods for Astrophysics ,Instrumentation and Methods for Astrophysics (astro-ph.IM) - Abstract
The Infra-Red Telescope (IRT) on board the Transient High Energy Sky and Early Universe Surveyor (THESEUS) ESA M5 candidate mission will play a key role in identifying and characterizing moderate to high redshift Gamma-Ray Bursts afterglows. The IRT is the enabling instrument on board THESEUS for measuring autonomously the redshift of the several hundreds of GRBs detected per year by the Soft X-ray Imager (SXI) and the X- and Gamma-Ray Imaging Spectrometer (XGIS), and thus allowing the big ground based telescopes to be triggered on a redshift pre-selected sample, and finally fulfilling the cosmological goals of the mission. The IRT will be composed by a primary mirror of 0.7 m of diameter coupled to a single camera in a Cassegrain design. It will work in the 0.7-1.8 {\mu}m wavelength range, and will provide a 10x10 arc min imaging field of view with sub-arc second localization capabilities, and, at the same time, a 5x5 arc min field of view with moderate (R up to ~500) spectroscopic capabilities. Its sensitivity, mainly limited by the satellite jitter, is adapted to detect all the GRBs, localized by the SXI/XGIS, and to acquire spectra for the majority of them., Comment: To be published in the Proceedings of the THESEUS Workshop 2017 (http://www.isdc.unige.ch/theseus/workshop2017.html), Journal of the Italian Astronomical Society (Mem.SAIt), Editors L. Amati, E. Bozzo, M. Della Valle, D. Gotz, P. O'Brien. Details on the THESEUS mission concept can be found in the white paper Amati et al. 2017 (arXiv:171004638) and Stratta et al. 2017 (arXiv:1712.08153)
- Published
- 2017
5. VizieR Online Data Catalog: COSMOS photometric redshift catalog (Ilbert+, 2009)
- Author
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Ilbert, O., Capak, P., Salvato, M., Aussel, H., Mccracken, H. J., Sanders, D. B., Scoville, N., Kartaltepe, J., Arnouts, S., Le Floc H, E., Mobasher, B., Taniguchi, Y., Lamareille, F., Leauthaud, A., Sasaki, S., Thompson, D., Zamojski, M., Zamorani, G., Bardelli, S., Bolzonella, M., Angela Bongiorno, Brusa, M., Caputi, K. I., Carollo, C. M., Contini, T., Cook, R., Coppa, G., Cucciati, O., La Torre, S., Ravel, L., Franzetti, P., Garilli, B., Hasinger, G., Iovino, A., Kampczyk, P., Kneib, J. -P, Knobel, C., Kovac, K., Le Borgne, J. F., Le Brun, V., Fevre, O. L., Lilly, S., Looper, D., Maier, C., Mainieri, V., Mellier, Y., Mignoli, M., Murayama, T., Pello, R., Peng, Y., Perez-Montero, E., Renzini, A., Ricciardelli, E., Schiminovich, D., Scodeggio, M., Shioya, Y., Silverman, J., Surace, J., Tanaka, M., Tasca, L., Tresse, L., Vergani, D., Zucca, E., Laboratoire d'Astrophysique de Marseille (LAM), and Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Photometry ,[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] ,Redshifts ,Surveys ,Galaxy catalogs - Published
- 2017
6. Deep observations of co line emission from star-forming galaxies in a cluster candidate at z = 1.5
- Author
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Aravena, M., Carilli, C. L., Salvato, M., Tanaka, M., Lentati, L., Schinnerer, E., Walter, F., Riechers, D., Smǒlcić, V., Capak, P., Aussel, H., Bertoldi, F., Chapman, S. C., Farrah, D., Finoguenov, A., Le Floc H, E., Lutz, D., Georgios Magdis, Oliver, S., Riguccini, L., Berta, S., Magnelli, B., and Pozzi, F.
- Subjects
PRIRODNE ZNANOSTI. Fizika ,ISM [galaxies] ,clusters: general [galaxies] ,high-redshift [galaxies] ,NATURAL SCIENCES. Physics - Abstract
We report results from a deep Jansky Very Large Array (JVLA) search for ^(12)CO J = 1–0 line emission from galaxies in a candidate galaxy cluster at z ∼ 1.55 in the COSMOS field. We target four galaxies with optical spectroscopic redshifts in the range z = 1.47–1.59, consistent with the likely redshift for the candidate galaxy cluster. Two of these four galaxies, ID 51613 and ID 51813, are nominally detected in CO 1–0 line emission at the 3–4σ level. We find CO luminosities of (2.42 ± 0.58) × 10^(10) K km s^(−1) pc^2 and (1.26 ± 0.38) × 10^(10) K km s^(−1) pc^2, respectively. Taking advantage from the clustering and expanded 2-GHz bandwidth of the JVLA, we perform a search for emission lines in the proximity of optical sources within the field of view of our observations (60 arcsec). We limit our search to galaxies with K_S < 23.5 (AB) and z_phot = 1.2–1.8. We find two bright optical galaxies, ID 51207 and ID 51380, to be associated with significant emission line peaks (>4σ) in the data cube, which we identify with the CO 1–0 line emission. To test the reliability of the line peaks found, we performed a parallel search for line peaks using a Bayesian inference method. Both CO line emitting candidates are identified with probabilities of 13 per cent and 72 per cent that there are line emitting sources in each case, respectively. Monte Carlo simulations show that such associations are statistically significant, with probabilities of chance association of 3.5 per cent and 10.7 per cent for ID 51207 and ID 51380, respectively. Modelling of their optical/IR spectral energy distributions indicates that the CO detected galaxies and candidates have stellar masses and star formation rates in the range (0.3–1.1) × 10^(11) M_⊙ and 60–160 M_⊙ yr^(−1), with star formation efficiencies comparable to that found in other star-forming galaxies at similar redshifts. By comparing the space density of CO emitters derived from our observations with the space density derived from previous CO detections at z ∼ 1.5, and with semi-analytic predictions for the CO luminosity function, we suggest that the latter tend to underestimate the number of CO galaxies detected at high redshift. Finally, we argue about the benefits of future searches for molecular gas line emission in clustered fields with upcoming submillimetre/radio facilities.
- Published
- 2016
7. Herschel reveals a Tdust-unbiased selection of z~ 2 ultraluminous infrared galaxies
- Author
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Magdis, G. E., Elbaz, D., Hwang, H. S., Amblard, A., Arumugam, V., Aussel, H., Blain, A., Bock, J., Boselli, A., Buat, V., Castro-Rodriguez, N., Cava, A., Chanial, P., Clements, D. L., Conley, A., Conversi, L., Cooray, A., Dowell, C. D., Dwek, E., Eales, S., Farrah, D., Franceschini, A., Glenn, J., Griffin, M., Halpern, M., Hatziminaoglou, E., Huang, J., Ibar, E., Isaak, K., Le Floc h, E., Lagache, G., Levenson, L., Lonsdale, C. J., Lu, N., Madden, S., Maffei, B., Mainetti, G., Marchetti, L., Morrison, G. E., Nguyen, H. T., O Halloran, B., Oliver, S. J., Omont, A., Owen, F. N., Page, M. J., Pannella, M., Panuzzo, P., Papageorgiou, A., Pearson, C. P., Perez-Fournon, I., Pohlen, M., Rigopoulou, D., Rizzo, D., Roseboom, I. G., Rowan-Robinson, M., Schulz, B., Scott, D., Seymour, N., Shupe, D. L., Smith, A. J., Stevens, J. A., Strazzullo, V., Symeonidis, M., Trichas, M., Tugwell, K. E., Vaccari, M., Valtchanov, I., Vigroux, L., Wang, L., Wright, G., Xu, C. K., and Zemcov, M.
- Subjects
galaxies: evolution, galaxies: high-redshift, galaxies: starburst, cosmology: observations, infrared: galaxies, submillimetre: galaxies - Abstract
Using Herschel Photodetector Array Camera (PACS) and Spectral and Photometric Imaging Receiver (SPIRE) observations of Lockman Hole-North and Great Observatories Origins Deep Survey-North (GOODS-N) as part of the Herschel Multi-tiered Extragalactic Survey (HerMES) project, we explore the far-infrared (IR) properties of a sample of mid-IR-selected starburst-dominated ultraluminous infrared galaxies (ULIRGs) at z~ 2. The selection of the sample is based on the detection of the stellar bump that appears in the spectral energy distribution of star-forming galaxies at 1.6 μm. We derive robust estimates of infrared luminosities (LIR) and dust temperatures (Td) of the population and find that while the luminosities in our sample span less than an order of magnitude (12.24 ≤ log(LIR/L·) ≤ 12.94), they cover a wide range of dust temperatures (25 ≤Td≤ 62 K). Galaxies in our sample range from those that are as cold as high-z submillimetre galaxies (SMGs) to those that are as warm as optically faint radio galaxies (OFRGs) and local ULIRGs. Nevertheless, our sample has median Td= 42.3 K, filling the gap between SMGs and OFRGs, bridging the two populations. We demonstrate that a significant fraction of our sample would be missed from ground-based (sub)mm surveys (850-1200 μm), showing that the latter introduce a bias towards the detection of colder sources. We conclude that Herschel observations confirm the existence of high-z ULIRGs warmer than SMGs, show that the mid-IR selection of high-z ULIRGs is not Td dependent, reveal a large dispersion in Td of high-z ULIRGs and provide the means to characterize the bulk of the ULIRG population, free from selection biases introduced by ground-based (sub)mm surveys. © 2010 The Authors. Journal compilation © 2010 RAS.
- Published
- 2010
8. Low Resolution Spectral Templates For AGNs and Galaxies From 0.03 -- 30 microns
- Author
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Assef, R. J., Kochanek, C. S., Brodwin, M., Cool, R., Forman, W., Gonzalez, A. H., Hickox, R. C., Jones, C., Le Floc H, E., John Moustakas, Murray, S. S., and Stern, D.
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Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Astrophysics::High Energy Astrophysical Phenomena ,FOS: Physical sciences ,Astrophysics::Earth and Planetary Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics::Galaxy Astrophysics ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present a set of low resolution empirical SED templates for AGNs and galaxies in the wavelength range from 0.03 to 30 microns based on the multi-wavelength photometric observations of the NOAO Deep-Wide Field Survey Bootes field and the spectroscopic observations of the AGN and Galaxy Evolution Survey. Our training sample is comprised of 14448 galaxies in the redshift range 0~ 3.4., Comment: Accepted for publication in The Astrophysical Journal. 26 text pages + 3 tables + 20 figures, modified to include comments made by the referee. Fortran codes, templates and electronic tables available at http://www.astronomy.ohio-state.edu/~rjassef/lrt .
- Published
- 2009
- Full Text
- View/download PDF
9. The cosmic infrared background resolved by Spitzer
- Author
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Dole, H., Lagache, Guilaine, Puget, J.-L., Caputi, K., Fernández-Conde, N., Le Floc 'h, E, Papovich, C., Pérez-González, P, Rieke, G., Blaylock, M., Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Steward Observatory, University of Arizona, Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Sud - Paris 11 (UP11)
- Subjects
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,galaxies: infrared ,cosmology: observations ,galaxies: starburst ,galaxies: evolution ,cosmology: diffuse radiation - Abstract
International audience; Aims. We quantify the contributions of 24 µm galaxies to the Far-Infrared (FIR) Background at 70 and 160 µm. We provide new estimates of the Cosmic Infrared Background (CIB), and compare it with the Cosmic Optical Background (COB). Methods. Using Spitzer data at 24, 70 and 160 µm in three deep fields, we stacked more than 19000 MIPS 24 µm sources with S 24 ≥ 60 µJy at 70 and 160 µm, and measured the resulting FIR flux densities. Results. This method allows a gain up to one order of magnitude in depth in the FIR. We find that the Mid-Infrared (MIR) 24 µm selected sources contribute to more than 70% of the Cosmic Infrared Background (CIB) at 70 and 160 µm. This is the first direct measurement of the contribution of MIR-selected galaxies to the FIR CIB. Galaxies contributing the most to the total CIB are thus z ∼ 1 luminous infrared galaxies, which have intermediate stellar masses. We estimate that the CIB will be resolved at 0.9 mJy at 70 and 3 mJy at 160 µm. By combining the extrapolation of the 24 µm source counts below analysis, we obtain lower limits of 7.1 ± 1.0 and 13.4 ± 1.7 nW m −2 sr −1 for the CIB at 70 and 160 µm, respectively. Conclusions. The MIPS surveys have resolved more than three quarters of the MIR and FIR CIB. By carefully integrating the Extragalactic Background Light (EBL) SED, we also find that the CIB has the same brightness as the COB, around 24 nW m −2 sr −1. The EBL is produced on average by 115 infrared photons for one visible photon. Finally, the galaxy formation and evolution processes emitted a brightness equivalent to 5% of the primordial electromagnetic background (CMB).
- Published
- 2006
- Full Text
- View/download PDF
10. IRAC Imaging of Lockman Hole
- Author
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Huang, J. -S, Pauline Barmby, Fazio, G. G., Willner, S. P., Wilson, G., Rigopoulou, D., Alonso-Herrero, A., Dole, H., Egami, E., Le Floc H, E., Papovich, C., Perez-Gonzalez, P. G., Rigby, J., Engelbracht, C. W., Gordon, K., Hines, D., Rieke, M., Rieke, G. H., Meisenheimer, K., and Miyzaki, S.
- Subjects
Astrophysics (astro-ph) ,FOS: Physical sciences ,Astrophysics - Abstract
IRAC imaging of a 4'7x4'7 area in the Lockman Hole detected over 400 galaxies in the IRAC 3.6 micron and 4.5 micron bands, 120 in the 5.8 micron, and 80 in the 8 micron bandin 30 minutes of observing time. Color-color diagrams suggest that about half of these galaxies are at redshifts 0.61.3). We also detect IRAC counterparts for 6 of the 7 SCUBA sources and all 9 XMM sources in this area. The detection of the counterparts of the SCUBA sources and galaxies at z>1.3 demonstrates the ability of IRAC to probe the universe at very high redshifts., Comment: 11 pages, 2 figures. accepted by ApJS, Spizter Special Issue
- Published
- 2004
11. Probing the Physical Properties of High Redshift Optically Obscured Galaxies in the Bootes NOAO Deep Wide Field Survey using the Infrared Spectrograph on Spitzer
- Author
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Higdon, S. J. U., Weedman, D., Higdon, J. L., Houck, J. R., Soifer, B. T., Armus, L., Vassilis Charmandaris, Herter, T. L., Brandl, B. R., Brown, M. J. I., Dey, A., Jannuzi, B., Le Floc H, E., and Rieke, M.
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