16 papers · ranked by Valyu relevance
M. Sharma, M. J. Page, Ignacio Ferreras, A. A. Breeveld
We derive the Ultra-Violet (UV) luminosity function (LF) of star-forming galaxies in the redshift range z = 0.6−1.2, in the rest-frame far-UV (1500 ˚A) wavelength. For this work, we are in particular interested in the bright end of the UV LF in this redshift range. Data from the XMM-Newton Optical Monitor (XMM-OM)…
Alexander Belles, C. Gronwall, M. H. Siegel, Robin Ciardullo + 1 more
Ultraviolet Luminosity Function at 0.2<z<1.2 Authors: ['Alexander Belles' 'C. Gronwall' 'M. H. Siegel' 'Robin Ciardullo' 'M. J. Page'] We present Swift Ultraviolet Optical Telescope (UVOT) observations of the deep field GOODS-N in four near-UV filters. A catalog of detected galaxies is reported, which will be used to…
Souradeep Bhattacharya, Kanak Saha
We characterise the rest-frame 1500 Å UV luminosity Function (UVLF) from deep AstroSat/UVIT F154W and N242W imaging in the Great Observatories Origins Survey South (GOODS-S) deep field. The UVLFs are constructed and subsequently characterised with fitted Schechter function parameters from FUV observations at z< 0.13…
Manuel Spitschan, James Mead, Chris Roos, Chris Lowis + 5 more
Light exposure has a profound impact on human physiology and behaviour. For example, light exposure at the wrong time can disrupt our circadian rhythms and acutely suppress the production of melatonin. In turn, appropriately timed light exposure can support circadian photoentrainment. Beginning with the discovery that…
Salvador Bará, Carmen Bao, Fabio Falchi
Light pollution can be rigorously described in terms of the volume concentration of anthropogenic photons (light quanta) in the terrestrial atmosphere. This formulation, consistent with the basic physics of the emission, scattering and absorption of light, allows one to express light pollution levels in terms of…
Tamás Dóka, Péter Horák
Distribution Modeling of an Ultraviolet Light Disinfection Process for Pathogen Inactivation Efficiency Evaluation Authors: ['Tamás Dóka' 'Péter Horák'] This study addresses the need to utilize bench-scale experimental results for ultraviolet (UV) light disinfection on solid food surfaces by proposing a novel framework…
Takuma Morimoto, Ai Numata, Kazuho Fukuda, Keiji Uchikawa
We typically have a fairly good idea whether a given object is self-luminous or illuminated, but it is not fully understood how we make this judgment. This study aimed to identify determinants of the luminosity threshold, a luminance level at which a surface begins to appear self-luminous. We specifically tested a…
Abdallah A. M. Ali, Kamel A. K. Gadallah, Osama. M. Shalabiea, Mohamed. M. Beheary
We characterize luminosity components of Ultra/Luminous Infrared Galaxies (U/LIRGs) in multi-wavelength from the X-ray to far-infrared. A set of 63 AGN U/LIRGs was selected where these galaxies are powered by a central active galactic nucleus (AGN). Utilizing the X-CIGALE code, SEDs for these galaxies are carried out…
Adithya Pai Uppinakudru, Cintia Casado, Ken Reynolds, Simon Stanley + 2 more
'Cristina Pablos' 'Javier Marugán'] Accurately modelling the propagation of radiant intensity in aqueous environments poses significant challenges for both academia and industry, due to complex interactions like absorption, scattering, and reflection. This study aims to improve the accuracy of optical modeling in…
Alban Fichet, Laurent Belcour, Pascal Barla
Figure 1: Fluorescent effects in a tristimulus render. (a) We introduce a method to render fluorescent materials in a non-spectral rendererer, exhibiting typical increased luminance and hue-shifting effects when the same materials are placed under a different lighting. (b) Our method (left insets) is based on a new…
Andreas Walter, Harald Schöbel
The requirements for novel and innovative production systems expedite research on light emitting diode-based illumination in a life science context. In course of these rapid developments, the scientific community is in need of a consensus regarding to the characterization and presentation of the applied lighting…
Jolyon Troscianko
Spectroradiometery is a vital tool in a wide range of biological, physical, astronomical and medical fields, yet its cost and accessibility are frequent barriers to use. Research into the effects of artificial light at night (ALAN) further compounds these difficulties with requirements for sensitivity to extremely low…
Michael A. Duncan, David Welch, Igor Shuryak, David J. Brenner
Far-UVC radiation, commonly defined as wavelengths from 200 nm – 235 nm, is a promising tool to help prevent the spread of disease. The unique advantage of far-UVC technology over traditional ultraviolet germicidal irradiation lies in the potential for direct application of far-UVC into occupied spaces since…
Jolyon Troscianko
The spatial and spectral properties of the light environment underpin the appearance of scenes and objects. As such its measurement is crucial for understanding many aspects of animal behaviour, ecology and evolution, along with many more applications in fields ranging from optical physics, agriculture/plant sciences…
Killian Duay, Takehiro Nagai
Luminosity thresholds define the luminance boundary at which a surface color shifts in appearance from being perceived as an illuminated surface to appearing self-luminous. Previous research suggests that the human visual system infers these thresholds based on internal references of physically realizable surface…
Eric Almeida Xavier
The use of ultraviolet (UV) sources in laboratories requires safety practices. For example, when the ultraviolet light of laminar flow is on, it is important that the researcher or team members do not remain in the environment. There are laminar flows that have glasses with an ultraviolet light filter, but many models…