Results 31 to 40 of about 14,126,310 (342)

Luminosity and surface brightness distribution of K-band galaxies from the UKIDSS Large Area Survey [PDF]

, 2009
We present luminosity and surface brightness distributions of 40,111 galaxies with K-band photometry from the United Kingdom Infrared Telescope (UKIRT) Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS), Data Release 3 and optical photometry from ...
Cross, Nicholas J. G., Loveday, Jon, Smith, Anthony J.   +2 more
core   +2 more sources

Modified-Segmented Split-Ring Based Polarization and Angle-Insensitive Multi-Band Metamaterial Absorber for X, Ku and K Band Applications

IEEE Access, 2020
A novel modified-segmented split-ring based symmetric metamaterial absorber is introduced in this paper for X, Ku, and K band applications. The perfect absorption was achieved with a total of 1.91 GHz absorption bandwidth using the conventional FR4 ...
Saif Hannan, M. Islam, N. Sahar, K. Mat, M. E. Chowdhury, H. Rmili   +5 more
semanticscholar   +1 more source

Fluctuations of K-band galaxy counts [PDF]

, 2003
We measure the variance in the distribution of off-plane (|b|>20 deg.) galaxies with ...
Betancort-Rijo, J. E., Lopez-Corredoira, M.   +1 more
core   +1 more source

Star Formation History and Extinction in the central kpc of M82-like Starbursts [PDF]

, 2003
We report on the star formation histories and extinction in the central kpc region of a sample of starburst galaxies that have similar far infrared (FIR), 10 micron and K-band luminosities as those of the archetype starburst M82.
A. Bressan, Bressan A., Evans R., Granato G. L., J. R. Valdes, M. Chavez, M. Rodriguez, Y. D. Mayya   +7 more
core   +2 more sources

K-band f.e.t. amplifiers

Electronics Letters, 1977
Single-stage f.e.t. amplifiers operating in K-band have been constructed using the Varian VSX 9305 0.5 µm-gate GaAs f.e.t. An amplifier gain of 9±1 dB was obtained over the frequency band 18.5-20.5 GHz and gain of 8±1 dB was observed from 23.0 to 26.0 GHz. An amplifier noise figure of 5.6 dB was measured at 24 GHz.
M.M. Nowak, P.A. Terzian, R.D. Fairman
openaire   +1 more source

K-band spectroscopy of pre-cataclysmic variables [PDF]

, 2007
Aims. There exists now substantial evidence for abundance anomalies in a number of cataclysmic variables (CVs), indicating that the photosphere of the secondary star incorporates thermonuclear processed material. However, the spectral energy distribution
Ali, B. T. Gänsicke, Beuermann, Bonfils, Bragaglia, Bruch, Bruch, C. Tappert, Carpenter, Cushing, Downes, F. P. Navarrete, Förster Schreiber, Gänsicke, Haefner, Haefner, Harrison, Harrison, Harrison, Hoard, Hoard, Ivanov, Kawka, Kawka, Kilkenny, Kirkpatrick, Kleinmann, L. Schmidtobreick, Leggett, Liebert, Marks, Maxted, Morales-Rueda, O'Donoghue, Oliver, Patterson, Pols, R. E. Mennickent, Ritter, Rodgers, Rousselot, Saffer, Schenker, Schreiber, Silvestri, Stocke, Tappert, Thorstensen   +47 more
core   +2 more sources

The Stellar Content of Obscured Galactic Giant H II Regions: II. W42 [PDF]

, 2000
We present near infrared J, H, and K images and K-band spectroscopy in the giant HII region W42. A massive star cluster is revealed; the color-color plot and K-band spectroscopic morphology of two of the brighter objects suggest the presence of young ...
Blum, R. D., Conti, P. S., Damineli, A.
core   +3 more sources

High-efficiency lithium niobate modulator for K band operation

APL Photonics, 2020
This paper reports a hybrid silicon nitride–lithium niobate electro-optic Mach–Zehnder-interferometer modulator that demonstrates overall improvements in terms of half-wave voltage, optical insertion loss, extinction ratio, and operational bandwidth. The
Abu Naim R. Ahmed, Shouyuan Shi, Andrew Mercante, Sean Nelan, Peng Yao, Dennis W. Prather   +5 more
doaj   +1 more source

The effect of thermally pulsating asymptotic giant branch stars on the evolution of the rest-frame near-infrared galaxy luminosity function [PDF]

, 2011
We address the fundamental question of matching the rest-frame K-band luminosity function (LF) of galaxies over the Hubble time using semi-analytic models, after modification of the stellar population modelling.
Baugh, Bower, Boylan-Kolchin, Bruno Henriques, Bruzual, Bruzual, Bruzual, Buzzoni, Chabrier, Chandrasekhar, Chiara Tonini, Cimatti, Cimatti, Cirasuolo, Claudia Maraston, Conroy, Croton, De Lucia, De Lucia, De Lucia, Eminian, Fabio Fontanot, Fioc, Fontana, Fontanot, Fontanot, Fontanot, Fontanot, Fontanot, Gabriella De Lucia, Gao, Guo, Hatton, Henriques, Henriques, Henriques, Iben, Kampakoglou, Kelson, Kimm, Kitzbichler, Lauer, Leitherer, Lo, Maraston, Maraston, Maraston, Maraston, Maraston, Marigo, Marigo, Menci, Menci, Monaco, Monaco, Monaco, Nicola Menci, Pierluigi Monaco, Pozzetti, Salpeter, Silva, Somerville, Springel, Taffoni, Thomas, Tinsley, Tonini, Tonini, van der Wel, Vazdekis, von der Linden, Wang, Weinmann, Worthey   +73 more
core   +2 more sources

Derivation of myoepithelial progenitor cells from bipotent mammary stem/progenitor cells.

PLoS ONE, 2012
There is increasing evidence that breast and other cancers originate from and are maintained by a small fraction of stem/progenitor cells with self-renewal properties.
Xiangshan Zhao, Gautam K Malhotra, Hamid Band, Vimla Band   +3 more
doaj   +1 more source