A5101970377- Solar and Space Plasma Dynamics
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Solar Radiation and Photovoltaics
- Geomagnetism and Paleomagnetism Studies
- Pregnancy and preeclampsia studies
- Maternal and fetal healthcare
- Solid State Laser Technologies
- Photorefractive and Nonlinear Optics
- Anesthesia and Pain Management
- Cardiac, Anesthesia and Surgical Outcomes
- Astronomy and Astrophysical Research
- Ionosphere and magnetosphere dynamics
- Nausea and vomiting management
- Glass properties and applications
- Neurosurgical Procedures and Complications
- Geophysics and Gravity Measurements
- Atmospheric Ozone and Climate
- Magnetic Field Sensors Techniques
- Luminescence Properties of Advanced Materials
- Magnetic confinement fusion research
- Nuclear Physics and Applications
- Quantum optics and atomic interactions
- History and Developments in Astronomy
- Synthetic Aperture Radar (SAR) Applications and Techniques
National Solar Observatory
2022-2024
Institut für Sonnenphysik
2016-2023
Hôpital Cochin
2020-2023
Assistance Publique – Hôpitaux de Paris
2021
Maternité Port Royal
2017-2020
Gouvernance, Risque, Environnement, Développement
2017
Heidelberg University
2013
Hôpital Antoine-Béclère
2012
European Space Research and Technology Centre
2012
Utrecht University
2009-2011
Abstract Study Analysis Group 21 (SAG21) of NASA’s Exoplanet Exploration Program was organized to study the effect stellar contamination on space-based transmission spectroscopy, a method for studying exoplanetary atmospheres by measuring wavelength-dependent radius planet as it transits its star. Transmission spectroscopy relies precise understanding spectrum star being occulted. However, stars are not homogeneous, constant light sources but have temporally evolving photospheres and...
The Daniel K. Inouye Solar Telescope (DKIST) will revolutionize our ability to measure, understand and model the basic physical processes that control structure dynamics of Sun its atmosphere. first-light DKIST images, released publicly on 29 January 2020, only hint at extraordinary capabilities which accompany full commissioning five facility instruments. With this Critical Science Plan (CSP) we attempt anticipate some what those enable, providing a snapshot scientific pursuits hopes engage...
Abstract The strongly coupled hydrodynamic, magnetic, and radiation properties of the plasma in solar chromosphere make it a region Sun's atmosphere that is poorly understood. We use data obtained with high-resolution Visible Broadband Imager (VBI) equipped an H β filter Spectro-Polarimeter (ViSP) on Daniel K. Inouye Solar Telescope to investigate fine-scale structure plage chromosphere. To aid interpretation VBI imaging data, we also analyze spectra from CHROMospheric Imaging Spectrometer...
Background This study compared the administration of 0.1% ropivacaine and 0.5 microg/ml sufentanil with that bupivacaine via patient-controlled epidural analgesia route during labor. Methods Two hundred healthy pregnant women at term a single fetus vertex fetal presentation were randomized in double-blind fashion to receive either or using pump (5-ml bolus dose, 10-min locked-out period, no basal infusion). Pain score on visual analog scale, Bromage (0-3), level sensory block, ratio, drug...
In LiNbO3 the intrinsic uv-excited luminescence in visible is controlled by stoichiometry of crystal and doping with Mg or Zn. Either increase Li/Nb ratio incorporation Zn lead to same change emission bandshape intensity. The increases increasing impurity concentration tends saturate above values about 5 mol% 7 These are 'thresholds' corresponding simultaneously a drastic reduction photorefraction. lifetimes temperature dependent again governed concentrations. results discussed terms...
Small-scale magnetic flux emergence in the quiet Sun is crucial for maintaining solar activity. On smallest scales studied so far, namely within individual granules, two mechanisms have been identified: tiny loops and form of sheets covering granule. While there are abundant observations evidence granule-covering much more limited. This work aims to statistically analyze sheets, quantify their frequency on surface potential contribution budget photosphere, investigate plasma dynamics...
Small-scale magnetic flux emergence in the quiet Sun is crucial for maintaining solar activity. On smallest scales studied so far, namely within individual granules, two mechanisms have been identified: tiny loops and form of sheets covering granule. While there are abundant observations evidence granule-covering much more limited. This work aims to statistically analyse sheets, quantify their frequency on surface potential contribution budget photosphere, investigate plasma dynamics...
This talk will report on the mission status and highlight recent science results of ESA/NASA Solar Orbiter mission. Orbiter’s return is significantly enhanced by coordinated observations with other space missions, including Parker Probe, SDO, SOHO, STEREO, Hinode IRIS, as well ground-based telescopes like DKIST SST. present examples such collaborative efforts outline future opportunities. Starting in February 2025, highly elliptical orbit get progressively more inclined to ecliptic...
Abstract Striated granular edges observed in the solar photosphere represent one of smallest-scale phenomena on Sun. They arise from interaction strongly coupled hydrodynamic, magnetic, and radiative properties plasma. In particular, modulations photospheric magnetic field strength cause variations density opacity along line sight, leading to their formation. Therefore, striation patterns can be used as valuable diagnostics for studying finest-scale structure field. The Daniel K. Inouye...
Convective collapse, a theoretically predicted process that intensifies existing weak magnetic fields in the solar atmosphere, was first directly observed single event by Nagata et al. (2008, ApJ, 677, L145) using high resolution Solar Optical Telescope (SOT) of Hinode satellite. Using same space telescope, we 49 such events and present statistical analysis convective collapse events. Our data sets consist time series polarimetric spectral scans two iron lines formed lower photosphere filter...
Abstract The new generation of solar instruments provides better spectral, spatial, and temporal resolution for a understanding the physical processes that take place on Sun. Multiple‐component profiles are more commonly observed with these instruments. Particularly, Hei 10830 Å triplet presents such peculiar spectral profiles, which give information velocity magnetic fine structure upper chromosphere. purpose this investigation is to describe technique efficiently fit two blended components...
We analyze a set of full Stokes profile observations the flaring active region NOAA 10808 recorded with Vector-Spectromagnetograph (VSM) SOLIS facility. aim to quantify transient and permanent changes in magnetic field velocity field. The results are put context MDI magnetograms reconstructed RHESSI X-ray images. find signs restructuring photospheric during flare close polarity inversion line (PIL) at site. At two locations umbra we encounter strong fields (approx. 3 kG), as inferred from I...
Numerical simulations of solar surface convection have predicted the existence supersonic horizontal flows in photospheric granulation. Recently, detection such data from Hinode satellite was reported. We study granular detail to understand their signatures spectral lines and test observational method used identify these observations. perform time-dependent 3D radiative MHD numerical synthesize Fe i 6302 Å at resolution for different viewing angles covering center-limb variation. There is...
Aims. Moreno-Insertis et al. (2018) recently discovered two types of flux emergence in their numerical simulations: magnetic loops and sheet emergence. Whereas loop has been documented well the last years, by utilising high-resolution full Stokes data from ground-based telescopes as satellites, is still an understudied process. We report here on first clear observational evidence a characterise its development. Methods. Full spectra Hinode spectropolarimeter were inverted with SIR code to...
The strongly coupled hydrodynamic, magnetic, and radiation properties of the plasma in solar chromosphere makes it a region Sun's atmosphere that is poorly understood. We use data obtained with high-resolution Visible Broadband Imager (VBI) equipped an H$\beta$ filter Spectro-Polarimeter (ViSP) at Daniel K. Inouye Solar Telescope to investigate fine-scale structure plage chromosphere. To aid interpretation VBI imaging data, we also analyze spectra from CHROMospheric Imaging Spectrometer on...
The US National Science Foundation 4m Daniel K. Inouye Solar Telescope (DKIST) on Haleakala, Maui is the largest solar telescope in world. DKIST's superb resolution and polarimetric sensitivity will enable astronomers to explore origins of magnetism, mechanisms coronal heating drivers flares mass ejections. DKIST operates as a coronagraph at infrared wavelengths, providing crucial measurements magnetic field corona. During its Operations Commissioning Phase, has already conducted significant...
The weak, turbulent magnetic fields that supposedly permeate most of the solar photosphere are difficult to observe, because Zeeman effect is virtually blind them. Hanle effect, acting on scattering polarization in suitable lines, can principle be used as a diagnostic for these fields. However, prediction majority field resides intergranular lanes also poses significant challenges observations high spatial resolution usually attain. We aim measure difference between granules and...
The properties of amorphous solids below 1 K are dominated by atomic tunneling systems. A basic description is given the standard model. Despite its success, model still remains phenomenological and little known about microscopic nature systems in solids. We present dielectric polarization echo experiments on partially deuterated glycerol. Nuclear quadrupoles, introduced deuteration, influence amplitude a characteristic way allow us to draw for first time detailed conclusions processes