F. Boulanger

Separation of polarized dust emission in Planck observations with scattering transforms

A. Tsouros, E. Russier E. Allys, Erwan Allys, C. Auclair et autres

Context . Polarized dust emission is a major astrophysical foreground contaminant for the measurement of cosmic microwave background (CMB) polarization, which must be accurately measured to look for the faint primordial polarization B modes of inflationary origin. The best currently available maps, …

fr, us, lb (code pays fourni par la source)

JWST imaging of the Pleiades: Anisotropy of turbulence in the cold neutral medium

G. Vigoureux, Nicolas Flagey, F. Boulanger, Alberto Noriega‐Crespo et autres

Interstellar medium studies rely on magnetohydrodynamic turbulence as a framework for interpretation. In this context, the statistical characterization of interstellar observations is of prime importance. We present a new perspective on diffuse interstellar matter by analyzing James Webb Space Telescope (JWST) observations …

fr, us, pr, ae (code pays fourni par la source)

Variance of dust temperature and spectral index in Planck polarization data using spin-moment expansion

V. Guillet, L. Vacher, J. Aumont, F. Boulanger et autres

Thermal dust is the major polarized foreground hindering the detection of primordial cosmic microwave background (CMB) B -modes. Its signal exhibits complex behavior in frequency space, arising from the combined variation in our Galaxy of the orientation of magnetic fields and the …

fr, it (code pays fourni par la source)

System-Level Optimization of Flux-Switching Machines With Multiple Excitation Sources in a Long-Term Flywheel Energy Storage System

F. Boulanger, Bruno Dehez

This paper presents the optimization of a LongTerm Flywheel Energy Storage System (LT-FESS) whose electromechanical converter is a Flux-Switching Machine (FSM). Three topologies of FSM that differ with their excitation source are investigated: the Permanent Magnet FSM (PM-FSM), Wound-Field FSM (WF-FSM) and …

be (code pays fourni par la source)

Observations of carbon radio recombination lines with the NenuFAR telescope

Lucie Cros, Antoine Gusdorf, Philippe L. Salomé, S. V. Stepkin et autres

Context. Carbon radio recombination lines (CRRLs) at decametre wavelengths trace the diffuse phase of the interstellar medium (ISM) of the Galaxy. Observations of these lines allow for physical parameters of this phase to be measured. Aims. We observed CRRLs with the recently …

fr, ua, it, es, ca, au, nl (code pays fourni par la source)

Advances on the Links Between Turbulent and Submeso‐ to Mesoscales During EUREC4A

Edouard Gauvrit, Marie‐Noëlle Bouin, J.‐M. Delouis, F. Boulanger

Abstract Turbulent processes in the atmospheric boundary layer (ABL) are parameterized in numerical weather prediction and climate models. Better understanding their modulation by larger‐scale organized structures, some of them being represented explicitly, is thus of great interest. In this study, we test …

fr (code pays fourni par la source)

Bird's-eye View of Molecular Gas across Stephan's Quintet Galaxy Group and Intragroup Medium

Bjorn H. C. Emonts, P. N. Appleton, U. Lisenfeld, P. Guillard et autres

Abstract We present the large-scale distribution and kinematics of cold molecular gas across the compact galaxy group Stephan’s Quintet, based on CO(2–1) observations performed with the Atacama Compact Array (ACA) and CO(1–0) data from the Combined Array for Research in Millimeter-wave Astronomy …

Absolute Reference for Microwave Polarization Experiments. The COSMOCal Project and its Proof of Concept

A. Ritacco, L. Bizzarri, S. Savorgnano, F. Boulanger et autres

Abstract Context. The cosmic microwave background (CMB), a remnant of the Big Bang, provides unparalleled insights into the primordial universe, its energy content, and the origin of cosmic structures. The success of forthcoming terrestrial and space experiments hinges on meticulously calibrated data. …

fr, it (code pays fourni par la source)

Confusion of extragalactic sources in the far-infrared: A baseline assessment of the performance of PRIMAger in intensity and polarization

M. Béthermin, Alberto D. Bolatto, F. Boulanger, Charles M. Bradford et autres

Aims. Because of their limited angular resolution, far-infrared telescopes are usually affected by the confusion phenomenon. Since several galaxies can be located in the same instrumental beam, only the brightest objects emerge from the fluctuations caused by fainter sources. The PRobe far-Infrared …

fr, us, gb (code pays fourni par la source)

PDRs4All

Dries Van De Putte, Raphaël Meshaka, Boris Trahin, E. Habart et autres

Context. Mid-infrared emission features are important probes of the properties of ionized gas and hot or warm molecular gas, which are difficult to probe at other wavelengths. The Orion Bar photodissociation region (PDR) is a bright, nearby, and frequently studied target containing …

us, fr, ca, es, be, jp, nl, gb, de, se, pt, cn, cl, br, au, it, in, dk, cu, ru (code pays fourni par la source)

Absolute reference for microwave polarization experiments -- The COSMOCal project and its proof of concept

A. Ritacco, L. Bizzarri, S. Savorgnano, F. Boulanger et autres

The cosmic microwave background (CMB), a remnant of the Big Bang, provides unparalleled insights into the primordial universe, its energy content, and the origin of cosmic structures. The success of forthcoming terrestrial and space experiments hinges on meticulously calibrated data. Specifically, the …

fr (code pays fourni par la source)

Confusion of extragalactic sources in the far infrared: a baseline assessment of the performance of PRIMAger in intensity and polarization

M. Béthermin, Alberto D. Bolatto, F. Boulanger, Charles Matt Bradford et autres

Because of their limited angular resolution, far-infrared telescopes are usually affected by confusion phenomenon. Since several galaxies can be located in the same instrumental beam, only the brightest objects emerge from the fluctuations caused by fainter sources. The probe far-infrared mission for …

fr (code pays fourni par la source)