A5091478511- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Plasmonic and Surface Plasmon Research
- Astro and Planetary Science
- Metamaterials and Metasurfaces Applications
- Astronomical Observations and Instrumentation
- Generative Adversarial Networks and Image Synthesis
- AI in cancer detection
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Advanced Antenna and Metasurface Technologies
- Transition Metal Oxide Nanomaterials
- Radiomics and Machine Learning in Medical Imaging
- Photonic Crystals and Applications
- Cell Image Analysis Techniques
- Optical Wireless Communication Technologies
- Adaptive optics and wavefront sensing
- Ga2O3 and related materials
- Optical Coatings and Gratings
- ZnO doping and properties
- Thermal Radiation and Cooling Technologies
- Gas Sensing Nanomaterials and Sensors
- Isotope Analysis in Ecology
- Advanced Photocatalysis Techniques
Technical University of Denmark
2023-2024
Washington University in St. Louis
2023-2024
Ørsted (Denmark)
2024
University of Southern Denmark
2017-2022
Odense Municipality
2020
University of Waterloo
2018
Pennsylvania State University
2011-2017
Bhabha Atomic Research Centre
2016
Tata Institute of Fundamental Research
2014
University of Central Florida
2006-2012
Electrochromic materials change optical properties (darken/lighten) in the presence of a small electric potential difference, making them suitable for many applications. By fabricating porous films from crystalline WO3 nanoparticles (see figure), this state-of-the-art technology has been profoundly advanced. Significantly enhanced durability, increased charge insertion, and better kinetics have demonstrated with an economical deposition process large-area
The Apache Point Observatory Galactic Evolution Experiment (APOGEE) is a high-resolution infrared spectroscopic survey spanning all environments (i.e., bulge, disk, and halo), with the principal goal of constraining dynamical chemical evolution models Milky Way. APOGEE takes advantage reduced effects extinction at wavelengths to observe inner Galaxy bulge an unprecedented level detail. survey's broad spatial wavelength coverage enables users data address numerous structure stellar...
Integration of multiple diversified functionalities into a single, planar and ultra-compact device has become an emerging research area with fascinating possibilities for realization very dense integration miniaturization in photonics that requires addressing formidable challenges, particularly operation the visible range. Here we design, fabricate experimentally demonstrate bifunctional gap-plasmon metasurfaces light, allowing simultaneous polarization-controlled unidirectional surface...
ABSTRACT Given the potential of ensemble asteroseismology for understanding fundamental properties large numbers stars, it is critical to determine accuracy scaling relations on which these measurements are based. From several powerful validation techniques, all indications so far show that stellar radius estimates from asteroseismic accurate within a few percent. Eclipsing binary systems hosting at least one star with detectable solar-like oscillations constitute ideal test objects...
Abstract Photocatalytic effects resulting in water splitting, reduction of carbon dioxide to fuels using solar energy, decomposition organic compounds, and light-induced hydrophilicity observed on surfaces various metal oxides (MOx), all rely the same basic physical mechanisms, have attracted considerable interest over past decades. TiO 2 ZnO, two natively n-type doped wide bandgap semiconductors exhibit mentioned above. In this study we propose a model for photo-induced MOx films, test /Si...
Metasurface-enabled broadband beam splitters integrated with quarter-wave plate functionality for simultaneous power splitting and circular-to-linear polarization conversion have been demonstrated.
We have obtained projected rotation velocities (vsini) of a sample 19 ultracool dwarfs with spectral types in the interval M6.5-T8 using high-resolution, near-infrared spectra NIRSPEC and Keck II telescope. Among our targets there are two young brown dwarfs, likely field stars, fifteen (30-72 Mjup) solar neighborhood. Our results indicate that T-type fast rotators marked contrast to M-type stars. derived vsini between <15 40 km/s for them, found no clear evidence T rotating strongly...
The analysis of eclipsing binaries containing non-radial pulsators allows: i) to combine two different and independent sources information on the internal structure evolutionary status components, ii) study effects tidal forces pulsations. KIC 3858884 is a bright Kepler target whose light curve shows deep eclipses, complex pulsation patterns with frequencies typical {\delta} Sct, highly eccentric orbit. We present result photometry high resolution phaseresolved spectroscopy. Spectroscopy...
(Abridged) We have obtained radial velocities of a sample 18 ultracool dwarfs (M6.5-T8) using high-resolution, near-infrared spectra with NIRSPEC and the Keck II telescope. confirmed that velocity Gl 570 D is coincident K-type primary star A, thus providing additional support for their true companionship. The presence planetary-mass companions around 2MASS J05591914-1404488 (T4.5V) has been analyzed five measurements over period 4.37 yr. computed UVW space motions total 21 L T within 20 pc...
The volatile abundances in comet 17P/Holmes were measured on three dates (UT 2007 October 27.6 and 31.3 November 2.3) using high-dispersion (λ/Δ λ ∼ 2.5 × 104) infrared spectroscopy with NIRSPEC at the W. M. Keck Observatory CSHELL NASA Infrared Telescope Facility. Compared to other comets, relative gas production rates coma show an enhancement of C2H6, HCN, C2H2 respect H2O, by factors ~2-3. CH3OH was also detected abundance H2O that is similar or perhaps slightly enhanced compared values...
We present observations of 36 late-M dwarfs obtained with the KeckII/NIRSPEC in J-band at a resolution \sim20,000. have measured projected rotational velocities, absolute radial and pseudo-equivalent widths atomic lines. 12 our targets did not previous measurements literature. For other 24 targets, we confirm previously reported measurements. find that 13 stars from sample vsini below measurement threshold (12 km/s) whereas four are fast rotators (vsini > 30 km/s). As rotation causes...
We are carrying out a large ancillary program with the SDSS-III, using fiber-fed multi-object NIR APOGEE spectrograph, to obtain high-resolution H-band spectra of more than 1200 M dwarfs. These observations used measure spectroscopic rotational velocities, radial physical stellar parameters, and variability target stars. Here, we describe selection for this survey results from first year scientific based on that is publicly available in SDSS-III DR10 data release. As part paper present RVs...
In this paper, we derive the fundamental properties of 1SWASPJ011351.29+314909.7 (J0113+31), a metal-poor (-0.40 +/- 0.04 dex), eclipsing binary in an eccentric orbit (~0.3) with orbital period ~14.277 d. Eclipsing M dwarfs orbiting solar-type stars (EBLMs), like J0113+31, have been identified from WASP light curves and follow-up spectroscopy course transiting planet search. We present first EBLM sample to be fully analysed, thus, define here methodology. The primary component mass 0.945...
The findings of the 2023 AAPM Grand Challenge on Deep Generative Modeling for Learning Medical Image Statistics are reported in this Special Report. goal challenge was to promote development deep generative models (DGMs) medical imaging and emphasize need their domain-relevant assessment via analysis relevant image statistics. As part Challenge, a training dataset developed based 3D anthropomorphic breast phantoms from VICTRE virtual toolbox. A two-stage evaluation procedure consisting...
Context. Radial velocity monitoring of very cool dwarfs such as late M- and hot L-dwarfs has become a promising tool to search for rocky planets well follow-up planetary candidates around found by transit surveys. These stars are faint at optical wavelengths, their spectral flux distribution peaks near-infrared (NIR) wavelengths. For this reason, it is desirable measure the radial velocities in wavelength regime. However, NIR there only few medium- high-resolution spectrographs available...
We present radial velocities of the M8V-type, very low-mass star vB 10 obtained at four different epochs between 2001 and 2008. use high-resolution (<i>R<i/> ~ 20 000) near-infrared (<i>J<i/>-band) spectra taken with nirspec instrument on Keck II telescope. Our data suggest that shows velocity variability an amplitude ~1 km s<sup>-1<sup/>, a result is consistent recent finding massive planet companion around star. More measurements better sampling orbital phase are required to precisely...
Efficient control and manipulation of light using metasurfaces requires high fabrication accuracy that becomes progressively demanding when decreasing the operation wavelength. Considering gap surface plasmon (GSP) based metasurfaces, we demonstrate which utilize third-order GSP resonance thereby involve relatively large nanobricks, can successfully be used for efficient polarization-controlled steering visible light. The reflection amplitude phase maps a 450 nm period array 50 thick...