Results 31 to 40 of about 926 (266)

A Model-independent Method to Determine H 0 Using Time-delay Lensing, Quasars, and Type Ia Supernovae

The Astrophysical Journal
Absolute distances from strong lensing can anchor Type Ia Supernovae (SNe Ia) at cosmological distances giving a model-independent inference of the Hubble constant ( H _0 ).
Xiaolei Li, Ryan E. Keeley, Arman Shafieloo, Kai Liao   +3 more
doaj   +1 more source

A catalog to unite them all: REGALADE, a revised galaxy compilation for the advanced detector era

Astronomy & Astrophysics
Context. Many applications in transient science, gravitational wave follow-up, and galaxy population studies require all-sky galaxy catalogs with reliable distances, extents, and stellar masses.
Tranin Hugo, Blagorodnova Nadejda, Gómez-Muñoz Marco A., Wavasseur Maxime, Groot Paul J., Landsberg Lloyd, Stoppa Fiorenzo, Bloemen Steven, Vreeswijk Paul M., Pieterse Daniëlle L. A., van Roestel Jan, Scaringi Simone, Faris Sara   +12 more
doaj   +1 more source

The redshift-distance and velocity-distance laws

The Astrophysical Journal, 1993
The distinction between Hubble's linear redshift-distance z(L) law and the linear velocity-distance V(L) law that emerged later is discussed, using first the expanding space paradigm and then the Robertson-Walker metric. The z(L) and V(L) laws are theoretically equivalent only in the limit of small redshifts, and failure to distinguish between the two ...
openaire   +1 more source

Nonlinear relativistic corrections to cosmological distances, redshift and gravitational lensing magnification: I. Key results [PDF]

Classical and Quantum Gravity, 2014
7 pages. v2 has significant presentational changes. v3 has new discussion on the magnitude of the corrections, plus minor corrections, and is the version to appear in ...
Umeh, Obinna, Clarkson, Chris, Maartens, Roy   +2 more
openaire   +4 more sources

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

The z = 9.625 Cosmic Gems galaxy was a compact “blue monster” propelled by massive star clusters★

Astronomy & Astrophysics
The recent discovery of five massive stellar clusters at z = 9.625 in the Cosmic Gems galaxy has raised the question about the formation mechanism of star clusters in the first 500 Myr after the Big Bang. We inferred the total stellar mass in clusters by
Vanzella E., Messa M., Adamo A., Loiacono F., Oguri M., Sharon K., Bradley L. D., Bergamini P., Meneghetti M., Claeyssens A., Welch B., Bradač M., Zanella A., Bolamperti A., Calura F., Hsiao T. Y.-Y., Zackrisson E., Ricotti M., Christensen L., Diego J. M., Bauer F. E., Xu X., Fujimoto S., Grillo C., Lombardi M., Rosati P., Resseguier T., Zitrin A., Bik A., Richard J., Abdurro’uf, Bhatawdekar R., Coe D., Frye B., Inoue A. K., Jimenez-Teja Y., Norman C., Rigby J. R., Trenti M., Hashimoto T.   +39 more
doaj   +1 more source

Distance-redshift and growth-redshift relations as two windows on acceleration and gravitation: Dark energy or new gravity? [PDF]

Physical Review D, 2006
Small distortions in the observed shapes of distant galaxies, a cosmic shear due to gravitational lensing, can be used to simultaneously determine the distance-redshift relation, $r(z)$, and the density contrast growth factor, $g(z)$. Both of these functions are sensitive probes of the acceleration.
Lloyd Knox, Yong-Seon Song, J. Anthony Tyson   +2 more
openaire   +1 more source

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

Intrinsic Redshifts and the Tully–Fisher Distance Scale

Astrophysics and Space Science, 2005
The Tully-Fisher relationship (TFR) has been shown to have a relatively small observed scatter of ~ +/-0.35 mag implying an intrinsic scatter < +/-0.30 mag. However, when the TFR is calibrated from distances derived from the Hubble relation for field galaxies scatter is consistently found to be +/-0.64 to +/-0.84 mag.
openaire   +2 more sources

Supraparticles Composed of Graphitic Carbon Nitride Nanoparticles and Silica‐Supported Horseradish Peroxidase as Customizable Hybrid Catalysts for Photo‐Biocatalytic Cascade Reactions in Continuous Flow

Advanced Functional Materials, EarlyView.
Herein presented supraparticles combine the nanoparticulate photocatalyst graphitic carbon nitride with the enzyme horseradish peroxidase, which is immobilized on silica nanoparticles. In an optimized compatibility range, both catalysts operate effectively within the hybrid supraparticles and catalyze a cascade reaction consisting of the photocatalytic
Bettina Herbig, Egzon Cermjani, Doris Hanselmann, Johannes Prieschl, Angelika Schmitt, Michael S. Moritz, Christian Papp, Greta Nölke, Stefano Di Fiore, Christoph Deckers, Thomas H. Rehm, Susanne Wintzheimer   +11 more
wiley   +1 more source