A5071422059- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Superconducting and THz Device Technology
- Radio Astronomy Observations and Technology
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Adaptive optics and wavefront sensing
- Gamma-ray bursts and supernovae
- Calibration and Measurement Techniques
- Cosmology and Gravitation Theories
- Atmospheric Ozone and Climate
- Spectroscopy and Laser Applications
- Astro and Planetary Science
- Geophysics and Gravity Measurements
- Scientific Research and Discoveries
- CCD and CMOS Imaging Sensors
- Molecular Spectroscopy and Structure
- Scientific Computing and Data Management
- History and Developments in Astronomy
- Pulsars and Gravitational Waves Research
- Dark Matter and Cosmic Phenomena
- Advanced Thermodynamic Systems and Engines
Institut d'Astrophysique Spatiale
2015-2024
Université Paris-Sud
2015-2024
Centre National de la Recherche Scientifique
2015-2024
Laboratoire d’Astrophysique de Marseille
2017-2024
Aix-Marseille Université
2017-2024
Château Gombert
2023-2024
Université Paris-Saclay
2005-2022
Sapienza University of Rome
2020
Institut polytechnique de Grenoble
2020
Centro de Astrobiología
2020
The Herschel Multi-tiered Extragalactic Survey (HerMES) is a legacy programme designed to map set of nested fields totalling ∼380 deg2. Fields range in size from 0.01 ∼20 deg2, using the Herschel-Spectral and Photometric Imaging Receiver (SPIRE) (at 250, 350 500 μm) Herschel-Photodetector Array Camera Spectrometer (PACS) 100 160 μm), with an additional wider component 270 deg2 SPIRE alone. These bands cover peak redshifted thermal spectral energy distribution interstellar dust thus capture...
The Herschel ATLAS is the largest open-time key project that will be carried out on Space Observatory. It survey 510 square degrees of extragalactic sky, four times larger than all other surveys combined, in five far-infrared and submillimetre bands. We describe survey, complementary multi-wavelength datasets combined with data, six major science programmes we are undertaking. Using new models based a previous galaxies, present predictions properties sources wavebands.
Gravitational lensing is a powerful astrophysical and cosmological probe particularly valuable at submillimeter wavelengths for the study of statistical individual properties dusty starforming galaxies. However identification gravitational lenses often time-intensive, involving sifting large volumes imaging or spectroscopic data to find few candidates. We used early from Herschel Astrophysical Terahertz Large Area Survey demonstrate that wide-area surveys can simply easily detect strong...
The Large APEX BOlometer CAmera, LABOCA, has been commissioned for operation as a new facility instrument at the Atacama Pathfinder Experiment 12 m submillimeter telescope. This 295-bolometer total power camera, operating in 870 atmospheric window, combined with high efficiency of and excellent transmission site, offers unprecedented capability mapping continuum emission wide range astronomical purposes.
We report observations of three SDSS z>6 QSOs at 250 GHz (1.2mm) using the 117-channel Max-Planck Millimeter Bolometer (MAMBO-2) array IRAM 30-meter telescope. J1148+5251 (z=6.41) and J1048+4637 (z=6.23) were detected with flux densities 5.0 +- 0.6 mJy 3.0 0.4 mJy, respectively. J1630+4012 (z=6.05) was not a 3 sigma upper limit 1.8 mJy. Upper density limits from VLA 43 for imply steeply rising spectra, indicative thermal infrared emission warm dust. The far-infrared luminosities are...
We report detections of six high-redshift (1.8 < z 6.4), optically luminous, radio-quiet quasars at 350 micron, using the SHARC II bolometer camera Caltech Submillimeter Observatory. Our observations double number for which micron photometry is available. By combining measurements with other submillimeter/millimeter wavelengths, each source we have determined temperature emitting dust (ranging from 40 to 60 K) and far-infrared luminosity (0.6 2.2 x 10(13) Lo). The combined mean spectral...
The Canada-France High-z Quasar Survey (CFHQS) is an optical survey designed to locate quasars during the epoch of reionization. In this paper we present discovery first four CFHQS at redshifts greater than 6, including most distant known quasar, J2329-0301 z = 6.43. We describe observational method used identify and optical, infrared, millimeter photometry near-infrared spectroscopy. investigate dust properties these quasars, finding unusual extinction curve for one quasar a high...
We report the detection of 2P_3/2 -> 2P_1/2 fine-structure line C+ at 157.74 micron in SDSSJ114816.64+525150.3 (hereafter J1148+5251), most distant known quasar, z=6.42, using IRAM 30-meter telescope. This is first [CII] high redshift, and also a Hyperluminous Infrared Galaxy (L_FIR > 10^13 Lsun). The detected significance level 8 sigma has luminosity 4.4 x 10^9 Lsun. L_[CII]/L_FIR ratio 2 10^-4, about an order magnitude smaller than observed local normal galaxies similar to...
We report the detection of high excitation CO emission from most distant quasar currently known, SDSS J114816.64+525150.3 (hereafter J1148+5251), at a redshift . The () and lines were detected using IRAM Plateau de Bure interferometer, showing width ≈. An upper flux limit for line was obtained observations with Effelsberg 100-meter telescope. Assuming no gravitational magnification, we estimate molecular gas mass Using by Walter et al. (2003), comparison ratios predictions large velocity...
We report ground-based follow-up observations of the exceptional source, ID141, one brightest sources detected so far in H-ATLAS cosmological survey. ID141 was observed using IRAM 30-meter telescope and Plateau de Bure interferometer (PdBI), Submillimeter Array (SMA) Atacama Pathfinder Experiment (APEX) submillimeter to measure dust continuum emission lines main isotope carbon monoxide ([C I] [C II]). The detection strong CO with PdBI confirms that is at high redshift (z=4.243 +/- 0.001)....
Millimeter-wave continuum astronomy is today an indispensable tool for both general Astrophysics studies and Cosmology. General purpose, large field-of-view instruments are needed to map the sky at intermediate angular scales not accessible by high-resolution interferometers coarse resolution space-borne or ground-based surveys. These have be installed focal plane of largest single-dish telescopes. In this context, we constructed deployed a multi-thousands pixels dual-band (150 260 GHz,...
We have used the IRAM Plateau de Bure millimetre interferometer and UKIRT 1–5 μm Imager Spectrometer (UIST) to test connection between major phases of spheroid growth nuclear accretion by mapping CO emission in nine submillimetre-detected QSOs at z= 1.7–2.6 with black hole (BH) masses derived from near-infrared spectroscopy. When combined one QSO obtained literature, we present sensitive CO(3–2) or CO(2–1) observations 10 selected epoch peak activity both submillimetre (submm) galaxies...
We present the results of a 7 mm spectral survey molecular absorption lines originating in disk z=0.89 spiral galaxy located front quasar PKS 1830-211. [...] A total 28 different species, plus 8 isotopic variants, were detected toward south-west region, about 2 kpc from center galaxy, which therefore has largest number species any extragalactic object so far. The our rotation diagram analysis show that temperatures are close to cosmic microwave background temperature 5.14 K we expect measure...
We present an analysis of 11 bright far-IR/submm sources discovered through a combination the Planck survey and follow-up Herschel-SPIRE imaging. Each source has redshift z=2.2-3.6 obtained blind search with EMIR at IRAM 30-m telescope. Interferometry SMA, optical/near-infrared imaging CFHT VLT reveal morphologies consistent strongly gravitationally lensed sources. Additional photometry was JCMT/SCUBA-2 IRAM/GISMO 850 um 2 mm, respectively. All objects are bright, isolated point in 18 arcsec...
(abridged) We present the IRAM-30m observations of multiple-J CO and CI line emission in a sample redshift ~2-4 Herschel-ATLAS SMGs. A non-negligible effect differential lensing is found for lines, which could have caused significant underestimations linewidths, hence dynamical masses. The SLEDs are to be similar those local starburst-dominated ULIRGs previously studied After correcting amplification, we derived global properties bulk molecular gas SMGs using non-LTE radiative transfer...
According to the Big Bang theory and as a consequence of adiabatic expansion Universe, temperature cosmic microwave background (CMB) increases linearly with redshift. This relation is, however, poorly explored, detection any deviation would directly lead (astro-)physics beyond standard model. We aim at measuring CMB an accuracy few percent z=0.89 toward molecular absorber in galaxy lensing quasar PKS1830-211. adopt Monte-Carlo Markov Chain approach, coupled predictions from non-LTE radiative...
The prototype of the NIKA2 camera, NIKA, is an instrument operating at IRAM 30-m telescope, which can observe simultaneously 150 and 260GHz. One main goals to measure pressure distribution in galaxy clusters high resolution using thermal SZ (tSZ) effect. Such observations have already proved be excellent probe cluster distributions even redshifts. However, important fraction host submm and/or radio point sources, significantly affect reconstructed signal. Here we report on <20" 260GHz...
We report the detection of high excitation CO emission from most distant quasar currently known, SDSS J114816.64+525150.3 (hereafter J1148+5251), at a redshift z=6.419. The (J=6-5) and (J=7-6) lines were detected using IRAM Plateau de Bure interferometer, showing width ~280 km/s. An upper flux limit for (J=1-0) line was obtained observations with Effelsberg 100-meter telescope. Assuming no gravitational magnification, we estimate molecular gas mass ~2x10^10 M_sun. Using (3-2) by Walter et...
Aims: We want to place stronger lower limits on the Cosmic Infrared Background (CIB) brightness at 24, 70 and 160 um measure extragalactic number counts these wavelengths in an homogeneous way from various surveys. Methods: Using Spitzer legacy data over 53.6 deg^2 of depths, we build catalogs with same extraction method each wavelength. [...] Number count uncertainties are estimated a counts-in-cells moment method, order take into account galaxy clustering. Furthermore, use stacking...
In this study the propelling efficiency (ep) of front-crawl swimming, by use arms only, was calculated in four subjects. This is ratio power used to overcome drag (Pd) total mechanical (Po) produced including wasted changing kinetic energy masses water (Pk). By an extended version system measure active (MAD system), Pd measured directly. Simultaneous measurement O2 uptake (VO2) enabled establishment relationship between rate expenditure (PVO2) and Po (since when swimming on MAD = Pd). These...
ABSTRACT We report the discovery of a bright ( f (250 μm)>400 mJy), multiply lensed submillimeter galaxy HERMES J105751.1+573027 in Herschel /SPIRE Science Demonstration Phase data from HerMES project. Interferometric 880 μm Submillimeter Array observations resolve at least four images with large separation ∼9″. A high-resolution adaptive optics K p image Keck/NIRC2 clearly shows strong lensing arcs. Follow-up spectroscopy gives redshift z = 2.9575, and model total magnification μ ∼ 11 ±...
We present the first set of maps and band-merged catalog from Herschel Stripe 82 Survey (HerS). Observations at 250, 350, 500 μm were taken with Spectral Photometric Imaging Receiver instrument aboard Space Observatory. HerS covers 79 deg2 along SDSS to an average depth 13.0, 12.9, 14.8 mJy beam−1 (including confusion) μm, respectively. was designed measure correlations external tracers dark matter density field—either point-like (i.e., galaxies selected radio X-ray) or extended clusters...
Using IRAM PdBI we report the detection of H2O in six new lensed ultra-luminous starburst galaxies at high redshift, discovered Herschel H-ATLAS survey. The sources are detected either 2_{02}-1_{11} or 2_{11}-2_{02} H_2O emission lines with integrated line fluxes ranging from 1.8 to 14 Jy.km/s. corresponding apparent luminosities mu x L_H2O ~ 3-12 10^8 Lo, where is lensing magnification factor (3 < 12). These results confirm that among strongest molecular such galaxies, intensities almost...
Measurement of the gas velocity distribution in galaxy clusters provides insight into physics mergers, through which large scale structures form Universe. Velocity estimates within intracluster medium (ICM) can be obtained via Sunyaev-Zel'dovich (SZ) effect, but its observation is challenging both term sensitivity requirement and control systematic effects, including removal contaminants. In this paper we report resolved observations, at 150 260 GHz, SZ effect toward triple merger MACS...