Results 31 to 40 of about 405 (203)

Strong gravitational lensing and dark energy complementarity [PDF]

Physical Review D, 2004
In the search for the nature of dark energy most cosmological probes measure simple functions of the expansion rate. While powerful, these all involve roughly the same dependence on the dark energy equation of state parameters, with anticorrelation between its present value w_0 and time variation w_a.
openaire   +3 more sources

Synergistic Effect on Enhanced Oil Recovery in High Salinity Carbonate Reservoirs Using a Novel PEI‐Functionalized Carbon Nanotube Nanocomposite

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Enhancing oil recovery (EOR) in mature reservoirs is hindered by high interfacial tension (IFT) and oil‐wet rock formations, especially under harsh, high‐salinity conditions. This study aims to overcome these limitations by synthesizing a novel carbon nanotube nanocomposite covalently grafted with polyethylenimine and non‐covalently ...
Mohamed Abu Shuheil, Dilipkumar S. Patel, N. Beemkumar, Tariq Abdulkader Alrihaim, Dhirendra Nath Thatoi, Ripendeep Singh, Rohit Kumar, Parminder Singh, Ahmad Khalid   +8 more
wiley   +1 more source

Strong Gravitational Lensing: Bright Galaxies & Lost Dark-Matter [PDF]

Proceedings of the International Astronomical Union, 2007
AbstractGravitational lensing and stellar dynamics provide two complementary methods to probe the smooth and clumpy stellar and dark-matter mass distribution in early-type galaxies, currently already over a range of two orders of magnitude in virial mass, more than ten orders of magnidude in dynamic mass range in each galaxy (i.e.
openaire   +2 more sources

Strong gravitational lensing by a charged Kiselev black hole [PDF]

The European Physical Journal C, 2017
We study the gravitational lensing scenario where the lens is a spherically symmetric charged black hole (BH) surrounded by quintessence matter. The null geodesic equations in the curved background of the black hole are derived. The resulting trajectory equation is solved analytically via perturbation and series methods for special choice of parameters
Azreg-Aïnou, Mustapha, Bahamonde, Sebastian, Jamil, Mubasher   +2 more
openaire   +6 more sources

Cross‐disciplinary integration: Information practices and a role for information scholars. An annual review of information science and technology paper

Journal of the Association for Information Science and Technology, EarlyView.
Abstract Cross‐disciplinary research is a priority for many academic institutions, with a growing body of scholarship dedicated to studying the central practice of cross‐disciplinarity: integration, or the synthesis of knowledge, information, and data across disciplines and domains.
Ciara Zogheib
wiley   +1 more source

Strong gravitational lensing of gravitational waves in Einstein Telescope [PDF]

Journal of Cosmology and Astroparticle Physics, 2013
13 pages, 4 figures, accepted to ...
Piórkowska, Aleksandra, Biesiada, Marek, Zhu, Zong-Hong   +2 more
openaire   +2 more sources

The ORCA‐TWIN qCMOS Experiment I. Science Case and Commissioning at Calar Alto Observatory

Astronomische Nachrichten, EarlyView.
ABSTRACT We describe a pilot study to explore a new generation of fast and low noise CMOS image sensors for time domain astronomy, using two remote telescopes with a baseline of 1635 km. The experiment involves direct imaging with novel qCMOS image sensor technology that combines fast readout with sub‐electron readout noise.
Martin M. Roth, Paško Roje, Stella Vješnica, Stefan Cikota, Alex J. Brown, Mike Kretlow, Marco Azzaro, Santiago Reinhart, Jesús Aceituno, Harry Dawson, Carsten Denker, Torsten Enßlin, Stephan Geier, Thomas Granzer, Thomas Kupfer, Gianluca Li Causi, Samaya Nissanke, José Luis Ortiz, Fernando Pedichini, Katja Poppenhäger, Axel Schwope   +20 more
wiley   +1 more source

Strong gravitational lensing’s ‘external shear’ is not shear

Monthly Notices of the Royal Astronomical Society
ABSTRACT The distribution of mass in galaxy-scale strong gravitational lenses is often modelled as an elliptical power-law plus ‘external shear’, which notionally accounts for neighbouring galaxies and cosmic shear along our line of sight.
Amy Etherington, James W Nightingale, Richard Massey, Sut-Ieng Tam, XiaoYue Cao, Anna Niemiec, Qiuhan He, Andrew Robertson, Ran Li, Aristeidis Amvrosiadis, Shaun Cole, Jose M Diego, Carlos S Frenk, Brenda L Frye, David Harvey, Mathilde Jauzac, Anton M Koekemoer, David J Lagattuta, Samuel Lange, Marceau Limousin, Guillaume Mahler, Ellen Sirks, Charles L Steinhardt   +22 more
openaire   +6 more sources

Strong gravitational lensing by spiral galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 1998
6 pages, 2 single-panel figures, 2 double-panel figures, one six-panel figure.
Moeller, Ole, Blain, A. W.
openaire   +2 more sources

‘School is their whole world’: Teachers' perspectives on loneliness among children and adolescents from England and mainland China

British Educational Research Journal, EarlyView.
Abstract As front‐line observers and active participants in pupils' daily lives, teachers closely monitor pupils' social interactions, emotional states and behavioural changes. Their unique perspective enables them to detect problems in the social lives of their pupils that may not be immediately visible to peers, parents or mental health professionals.
Yixuan Zheng, Charlotte Bagnall, Caroline Bond, Elizabeth Birchinall, Pamela Qualter   +4 more
wiley   +1 more source