Results 111 to 120 of about 335,375 (390)

Ultra‐Effective Light‐Activated Antibacterial Activity via Carboxyl Functionalized Graphene Quantum Dots and Films

Advanced Functional Materials, EarlyView.
Carboxyl‐functionalized graphene quantum dots (cGQDs) exhibit high singlet oxygen quantum yield due to strong spin–orbit coupling. cGQDs achieve minimum bactericidal concentration of only 0.4 µg mL−1 against S. aureus under low‐intensity illumination.
Muhammad Hassnain, Laure S. van Hofwegen, Humeyra Nur Kaleli, Temirlan Kubanaliev, Zafer Eroglu, Asim Onal, Payal P. S. Balraadjsing, Onder Metin, Fahri Alkan, Sebastian A. J. Zaat, Sedat Nizamoglu   +10 more
wiley   +1 more source

Forward Modeling of Galaxy Populations for Cosmological Redshift Distribution Inference

The Astrophysical Journal Supplement Series, 2023
We present a forward-modeling framework for estimating galaxy redshift distributions from photometric surveys. Our forward model is composed of: a detailed population model describing the intrinsic distribution of the physical characteristics of galaxies,
Justin Alsing, Hiranya Peiris, Daniel Mortlock, Joel Leja, Boris Leistedt   +4 more
doaj   +1 more source

Reconstructing Redshift Distributions with Cross-Correlations: Tests and an Optimized Recipe [PDF]

The Astrophysical Journal, 721:456-468, 2010, 2010
Many of the cosmological tests to be performed by planned dark energy experiments will require extremely well-characterized photometric redshift measurements. Current estimates are that the true mean redshift of the objects in each photo-z bin must be known to better than 0.002(1+z) if errors in cosmological measurements are not to be degraded.
arxiv   +1 more source

Redshift Drift in LTB Void Universes

, 2010
We study the redshift drift, i.e., the time derivative of the cosmological redshift in the Lema\^itre-Tolman-Bondi (LTB) solution in which the observer is assumed to be located at the symmetry center.
A. Balbi, Chul-Moon Yoo, K. Bolejko, Ken-ichi Nakao, L. Pasquini, M.-N. Celerier, R. Gilmozzi, S. Cristiani, S. February, Tomohiro Kai   +9 more
core   +1 more source

Constraining Cosmic Evolution of Type Ia Supernovae [PDF]

, 2007
We present the first large-scale effort of creating composite spectra of high-redshift type Ia supernovae (SNe Ia) and comparing them to low-redshift counterparts.
A. C. Becker, A. Clocchiatti, A. G. Riess, A. Miceli, A. Rest, A. Zenteno, Alexei V. Filippenko, B. Leibundgut, B. P. Schmidt, C. Aguilera, C. W. Stubbs, Ciatti F., G. Miknaitis, G. Pignata, J. L. Tonry, J. Sollerman, J. Spyromilio, James J. B., K. Krisciunas, N. B. Suntzeff, P. Challis, P. M. Garnavich, Patat F., R. C. Smith, R. Covarrubias, R. P. Kirshner, Ryan J. Foley, S. Blondin, S. W. Jha, T. M. Davis, T. Matheson, W. Li, W. M. Wood‐Vasey, Younger P. F.   +33 more
core   +7 more sources

The SDSS-IV Extended Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations at Redshift of 0.72 with the DR14 Luminous Red Galaxy Sample [PDF]

Astrophysical Journal, 2017
The extended Baryon Oscillation Spectroscopic Survey (eBOSS) Data Release 14 sample includes 80,118 luminous red galaxies (LRGs). By combining these galaxies with the high-redshift tail of the BOSS galaxy sample, we form a sample of LRGs at an effective ...
J. Bautista, M. Vargas-Magaña, K. Dawson, W. Percival, J. Brinkmann, J. Brownstein, Benjamin Camacho, J. Comparat, H. Gil-Mar'in, E. Mueller, J. Newman, A. Prakash, A. Ross, D. Schneider, H. Seo, J. Tinker, R. Tojeiro, Zhongxu Zhai, Gong-Bo Zhao   +18 more
semanticscholar   +1 more source

Enhancing Optoelectronic Properties in Phthalocyanine‐Based SURMOFs: Synthesis of ABAB Linkers by Avoiding Statistical Condensation with Tailored Building Blocks

Advanced Functional Materials, EarlyView.
A novel phthalocyanine (PC)‐based metal–organic framework (MOFs) is synthesized using ditopic PC linkers obtained through regioselective statistical condensation. The resulting MOF exhibits significant improvements in electronic absorption, thereby enhancing the material's performance in light harvesting and energy conversion.
Lukas S. Langer, Mareen Stahlberger, Xiaojing Liu, Yi Luo, Niklas E. Häußermann, Puja Singhvi, Yidong Liu, Olaf Fuhr, Martin Nieger, Lars Heinke, Thomas Heine, Christof Wöll, Stefan Bräse   +12 more
wiley   +1 more source

An improved redshift indicator for Gamma-Ray Bursts, based on the prompt emission

, 2006
We propose an improved version of the redshift indicator developed by Atteia (2003), which gets rid of the dependence on the burst duration and provides better estimates for high-redshift GRBs.
Atteia, Jean-Luc, Collaboration, the the HETE Science Team, Lamb, Don Q., Pélangeon, Alexandre, Ricker, George R.   +4 more
core   +2 more sources

Inter‐Layer Diffusion of Excitations in 2D Perovskites Revealed by Photoluminescence Reabsorption

Advanced Functional Materials, EarlyView.
Inter‐layer diffusion of photoexcitations is monitored in thin films of the 2D perovskite (PEA)2PbI4 by tracking time‐dependent changes in photoluminescence spectra induced by photon reabsorption effects. A low out‐of‐plane excitation diffusion coefficient of 0.26 × 10−4 cm2 s−1 is determined through 1D diffusion modeling.
Jiaxing Du, Marcello Righetto, Manuel Kober‐Czerny, Siyu Yan, Karim A. Elmestekawy, Henry J. Snaith, Michael B. Johnston, Laura M. Herz   +7 more
wiley   +1 more source

Prescriptions for Correcting Ultraviolet-Based Redshifts for Luminous Quasars at High Redshift [PDF]

, 2020
High-redshift quasars typically have their redshift determined from rest-frame ultraviolet (UV) emission lines. However, these lines, and more specifically the prominent C IV $\lambda 1549$ emission line, are typically blueshifted yielding highly uncertain redshift estimates compared to redshifts determined from rest-frame optical emission lines.
arxiv   +1 more source