Results 41 to 50 of about 247,102 (346)

ВЛИЯНИЕ ГРАВИТАЦИОННОГО ЛИНЗИРОВАНИЯ НА ФУНКЦИЮ СВЕТИМОСТИ КВАЗАРОВ

Odessa Astronomical Publications, 2011
The function of quasar distribution on apparent brightness is discussed. This function is found on base of suggestion that quasars, at least partly, are strong gravitational lensing images of the active nuclei of distant galaxies.
Ю. Л. Бухмастова
doaj   +1 more source

The Quasar Luminosity Function [PDF]

Symposium - International Astronomical Union, 1996
Recent results at high redshifts are briefly reviewed. An analysis of the evolution of the quasar luminosity function based on the recently published Hawkins & Véron (1995) variability-selected quasar sample is presented. The results support the conclusions of earlier work that suggested the simple two power law luminosity function, of invariant ...
openaire   +1 more source

Substrate specificity of Burkholderia pseudomallei multidrug transporters is influenced by the hydrophilic patch in the substrate‐binding pocket

FEBS Letters, EarlyView.
Multidrug transporters BpeB and BpeF from the Gram‐negative pathogen Burkholderia pseudomallei have a hydrophilic patch in their substrate‐binding pocket. Drug susceptibility tests and growth curve analyses using an Escherichia coli recombinant expression system revealed that the hydrophilic patches of BpeB and BpeF are involved in the substrate ...
Ui Okada, Satoshi Murakami
wiley   +1 more source

New model for calculation the radius of comet’s nucleus [PDF]

E3S Web of Conferences
In this work, a new equation derived to obtain some physical properties like radius and luminosity of comets using distances between the comet, the Earth and the Sun that represent the geocentric distance and heliocentric distance at applying it to a ...
Mohammed Abd-AL Hamza Mariam, Zaidan Khalaf Salman   +1 more
doaj   +1 more source

Keck Deep Fields. II. The UV Galaxy Luminosity Function at z~4, 3, and 2 [PDF]

, 2006
We use very deep UGRI multi-field imaging obtained at the Keck telescope to study the evolution of the rest-frame 1700A galaxy luminosity function as the Universe doubles its age from z~4 to z~2.
David Thompson, Iwata I., Madau P., Marcin Sawicki   +3 more
core   +2 more sources

Galaxy luminosity functions in WINGS clusters [PDF]

Astronomy & Astrophysics, 2015
Aims. Using V band photometry of the WINGS survey, we derive galaxy luminosity functions (LF) in nearby clusters. This sample is complete down to MV = −15.15, and it is homogeneous, thus allowing the study of an unbiased sample of clusters with different characteristics. Methods.
MORETTI, ALESSIA, Bettoni, D., Poggianti, B. M., Fasano, G., Varela, J., D'ONOFRIO, MAURO, VULCANI, BENEDETTA, Cava, A., Fritz, J., Couch, W. J., Moles, M., Kjærgaard, P.   +11 more
openaire   +4 more sources

Adenosine‐to‐inosine editing of miR‐200b‐3p is associated with the progression of high‐grade serous ovarian cancer

Molecular Oncology, EarlyView.
A‐to‐I editing of miRNAs, particularly miR‐200b‐3p, contributes to HGSOC progression by enhancing cancer cell proliferation, migration and 3D growth. The edited form is linked to poorer patient survival and the identification of novel molecular targets.
Magdalena Niemira, Anna Skwarska, Karolina Chwialkowska, Agnieszka Ostrowska, Gabriela Sokolowska, Anna Zeller, Anna Erol, Andrzej Eljaszewicz, Bartosz Hanczaruk, Anna Michalska‐Falkowska, Agnieszka Tarasik, Joanna Reszec‐Gielazyn, Pawel Knapp, Marcin Moniuszko, Adam Kretowski   +14 more
wiley   +1 more source

The Structure Function of Mid-infrared Variability in Low-redshift Active Galactic Nuclei

The Astrophysical Journal, 2023
Using the multi-epoch mid-infrared (MIR) photometry from the Wide-field Infrared Survey Explorer spanning a baseline of ∼10 yr, we extensively investigate the MIR variability of nearby active galactic nuclei (AGNs) at 0.15 < z < 0.4.
Suyeon Son, Minjin Kim, Luis C. Ho
doaj   +1 more source

Thermal Energy and Luminosity Characterization of an Advanced Ignition System Using a Non-Intrusive Methodology in an Optically Accessible Calorimeter

Energies, 2023
To restrain the environmental impact of modern SI engines, igniters must guarantee stable combustions with low cycle-to-cycle variability in extreme operating conditions (high EGR, ultra-lean), via high energy release in the combustion chamber.
Roberto Martinelli, Federico Ricci, Gabriele Discepoli, Luca Petrucci, Stefano Papi, Carlo N. Grimaldi   +5 more
doaj   +1 more source

Evolution of the Luminosity Function and Colors of Galaxies in a Lambda-CDM Universe

, 2001
The luminosity function of galaxies is derived from a cosmological hydrodynamic simulation of a Lambda cold dark matter (CDM) universe with the aid of a stellar population synthesis model. At z=0, the resulting B band luminosity function has a flat faint
Arnett, Balbi, Baugh, Blanton, Blumenthal, Bruzual, Bryan, Buta, Cardelli, Cen, Cen, Cen, Cole, Cross, Davis, Davis, de Vaucouleurs, Dekel, Efstathiou, Efstathiou, Eisenstein, Ellis, Fioc, Fried, Fukugita, Fukugita, Gould, Hu, J.P. Ostriker, K. Nagamine, Katz, Kauffmann, Kravtsov, Lange, Lilly, Lin, M. Fukugita, Nagamine, Ostriker, Perlmutter, R. Cen, Rees, Rees, Rieke, Riess, Salpeter, Silk, Sneden, Somerville, Steidel, Steidel, Turner, White   +52 more
core   +1 more source