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of 69
pro vyhledávání: '"Premadi, Premana"'
Autor:
Jaelani, Anton T., More, Anupreeta, Wong, Kenneth C., Inoue, Kaiki T., Chao, Dani C. -Y., Premadi, Premana W., Cañameras, Raoul
We apply a novel model based on convolutional neural networks (CNNs) to identify gravitationally-lensed galaxies in multi-band imaging of the Hyper Suprime Cam Subaru Strategic Program (HSC-SSP) Survey. The trained model is applied to a parent sample
Externí odkaz:
http://arxiv.org/abs/2312.07333
We report the results of combined analyses of X-ray and optical data of two galaxy clusters, CL 0024$+$1654 and RX J0152.7$-$1357 at redshift $z = 0.395$ and $z = 0.830$, respectively, which offer a holistic physical description of the two clusters.
Externí odkaz:
http://arxiv.org/abs/2106.14581
Akademický článek
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Autor:
Nugroho, Dading, Premadi, Premana
We present the analysis and results of photometric and spectroscopic catalog combined with X-ray data of two non-relaxed clusters CL 0024+1654 (z=0.4) and RX J0152.7-1357 (z=0.8). Using the Spearman correlation analysis we quantify the correlation be
Externí odkaz:
http://arxiv.org/abs/0903.2668
Autor:
Handini, Ajeng T., Premadi, Premana W., Yulianty, Yatny, Yusuf, Muhammad, Luthfiandari, Gilang Ramadhan, Dhimaz, Ramadhan, Sahlan, Yap, Ferry, Perhati, Teduh, Yuna, Dwi Y.
Publikováno v:
Journal of Physics: Conference Series; 2024, Vol. 2773 Issue 1, p1-6, 6p
Autor:
Martel, Hugo, Premadi, Premana
We use a series of ray-tracing experiments to determine the magnification distribution of high-redshift sources by gravitational lensing. We determine empirically the relation between magnification and redshift, for various cosmological models. We th
Externí odkaz:
http://arxiv.org/abs/0710.5452
Autor:
Premadi, Premana, Martel, Hugo
We use a series of ray-tracing experiments to determine the magnification distribution of high-redshift sources by gravitational lensing. We determine empirically the relation between magnification and redshift, for various cosmological models. We th
Externí odkaz:
http://arxiv.org/abs/astro-ph/0503446
Autor:
Premadi, Premana, Martel, Hugo
Publikováno v:
Astrophys.J. 611 (2004) 1-11
We study the gravitational lensing of high-redshift sources in a LCDM universe. We have performed a series of ray-tracing experiments, and selected a subsample of cases of strong lensing (multiple images, arcs, and Einstein rings). For each case, we
Externí odkaz:
http://arxiv.org/abs/astro-ph/0405603
Using an analytical model, we compute the distribution of image separations resulting from gravitational lensing of distant sources, for 7 COBE-normalized CDM models with various combinations of Omega_0 and lambda_0. Our model assumes that multiple i
Externí odkaz:
http://arxiv.org/abs/astro-ph/0201198
Publikováno v:
Astrophys.J.Suppl. 135 (2001) 7-40
Using a multiple-lens plane algorithm, we study light propagation in inhomogeneous universes, for 43 different COBE-normalized Cold Dark Matter models, with various values of the density parameter Omega_0, cosmological constant lambda_0, Hubble const
Externí odkaz:
http://arxiv.org/abs/astro-ph/0101359