Search Results - "Mertens, F.G."

Comparing foreground removal techniques for recovery of the LOFAR-EoR 21 cm power spectrum by Hothi, Ian, Chapman, Emma, Pritchard, Jonathan R, Mertens, F G, Koopmans, L V E, Ciardi, B, Gehlot, B K, Ghara, R, Ghosh, A, Giri, S K, Iliev, I T, Jelić, V, Zaroubi, S

“…ABSTRACT We compare various foreground removal techniques that are being utilized to remove bright foregrounds in various experiments aiming to detect the…”
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Switching of vortex polarization in 2D easy-plane magnets by magnetic fields by ZAGORODNY, J. P, GAIDIDEI, Y, MERTENS, F. G, BISHOP, A. R

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The AARTFAAC Cosmic Explorer: observations of the 21-cm power spectrum in the EDGES absorption trough by Gehlot, B K, Mertens, F G, Koopmans, L V E, Offringa, A R, Shulevski, A, Mevius, M, Brentjens, M A, Kuiack, M, Pandey, V N, Rowlinson, A, Sardarabadi, A M, Vedantham, H K, Wijers, R A M J, Yatawatta, S, Zaroubi, S

“…ABSTRACT The 21-cm absorption feature reported by the EDGES collaboration is several times stronger than that predicted by traditional astrophysical models. If…”
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Ionospheric contributions to the excess power in high-redshift 21-cm power-spectrum observations with LOFAR by Brackenhoff, S A, Mevius, M, Koopmans, L V E, Offringa, A, Ceccotti, E, Chege, J K, Gehlot, B K, Ghosh, S, Höfer, C, Mertens, F G, Munshi, S, Zaroubi, S

“…ABSTRACT The turbulent ionosphere causes phase shifts to incoming radio waves on a broad range of temporal and spatial scales. When an interferometer is not…”
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Constraining the intergalactic medium at $z\approx$ 9.1 using LOFAR Epoch of Reionization observations by Ghara, R., Giri, S.K., Mellema, G., Ciardi, B., Zaroubi, S., Iliev, I.T., Koopmans, L.V.E., Chapman, E., Gazagnes, S., Gehlot, B.K., Ghosh, A., Jelic, V., Mertens, F.G., Mondal, R., Schaye, J., Silva, M.B., Asad, K.M.B., Kooistra, R., Mevius, M., Offringa, A.R., Pandey, V.N., Yatawatta, S.

“…We derive constraints on the thermal and ionization states of the intergalactic medium (IGM) at redshift ≈ 9.1 using new upper limits on the 21-cm power…”
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Improved upper limits on the 21-cm signal power spectrum of neutral hydrogen at $\boldsymbol{z \approx 9.1}$ from LOFAR by Mertens, F.G., Mevius, M., Koopmans, L.V.E, Offringa, A.R., Mellema, G., Zaroubi, S., Brentjens, M.A., Gan, H., Gehlot, B.K., Pandey, V.N., Sardarabadi, A.M., Vedantham, H.K., Yatawatta, S., Asad, K.M.B., Ciardi, B., Chapman, E., Gazagnes, S., Ghara, R., Ghosh, A., Giri, S.K., Iliev, I.T., Jelíc, V., Kooistra, R., Mondal, R., Schaye, J., Silva, M.B.

“…A new upper limit on the 21 cm signal power spectrum at a redshift of z ≈ 9.1 is presented, based on 141 h of data obtained with the Low-Frequency Array…”
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Vortex polarity switching by a spin-polarized current by Caputo, Jean-Guy, Gaididei, Yuri, Mertens, Franz G, Sheka, Denis D

“…The spin-transfer effect is investigated for the vortex state of a magnetic nanodot. A spin current is shown to act similarly to an effective magnetic field…”
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Vortex polarity in 2-D magnetic dots by Langevin dynamics simulations by Depondt, Ph, Lévy, J.-C.S., Mertens, F.G.

“…Two-dimensional magnetic plots of finite size were simulated by integrating the Landau–Lifshitz equation for the isotropic Heisenberg model with a systematic…”
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Soliton dynamics in damped and forced Boussinesq equations by Arévalo, E., Gaididei, Yu, Mertens, F.G.

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Scattering of vortex pairs in 2D easy-plane ferromagnets by Kovalev, A.S., Komineas, S., Mertens, F.G.

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Soliton diffusion on the classical, isotropic Heisenberg chain by MEISTER, M, MERTENS, F. G, SANCHEZ, A

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Cycloidal vortex motion in easy-plane ferromagnets due to interaction with spin waves by KOVALEV, A. S, MERTENS, F. G, SCHNITZER, H. J

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Thermal diffusion of sine-Gordon solitons by QUINTERO, N. R, SANCHEZ, A, MERTENS, F. G

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A collective-variable theory for nonlinear coherent excitations in classical Hamiltonian systems by Schnitzer, H.J., Mertens, F.G., Bishop, A.R.

“…We derive a collective-variable theory for nonlinear coherent excitations that is based on Dirac’s formalism of constrained Hamiltonian systems. No…”
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Internal mode dynamics in driven nonlinear Klein-Gordon systems by QUINTERO, N. R, SANCHEZ, A, MERTENS, F. G

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Multi-component structure of nonlinear excitations in systems with length-scale competition by CHRISTIANSEN, P. L, GAIDIDEI, Y. B, MERTENS, F. G, MINGALEEV, S. F

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Vortices in quantum spin systems by SCHLIEMANN, J, MERTENS, F. G

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Envelope solitary waves on two-dimensional lattices with in-plane displacements by GAIDIDEI, Y, HUSS, R, MERTENS, F. G

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Topological and dynamical excitations in a classical 2D easy-axis Heisenberg model by KAMPPETER, T, LEONEL, S. A, MERTENS, F. G, GOUVEA, M. E, PIRES, A. S. T, KOVALEV, A. S

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Finite temperature dynamics of vortices in the two dimensional anisotropic Heisenberg model by KAMPPETER, T, MERTENS, F. G, SANCHEZ, A, BISHOP, A. R, DOMINGUEZ-ADAME, F, GRØNBECH-JENSEN, N

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