Results 21 to 30 of about 1,004,561 (294)

Modification of cluster radio halo appearance by the thermal Sunyaev-Zeldovich effect [PDF]

, 2002
We discuss the consequences of the spectral and morphological modification of galaxy cluster radio halos due to the Sunyaev-Zeldovich (SZ) effect for the interpretation of existing and upcoming high frequency radio observations.
Blasi, Briel, Brunetti, Buote, Colafrancesco, De Petris, Deiss, Dennison, Dolag, Enßlin, Enßlin, Enßlin, Giovannini, Giovannini, Giovannini, Govoni, Herbig, Jaffe, Kempner, Liang, Mason, Miniati, Schlickeiser, Shimon, Sunyaev, T. A. Enßlin, Zeldovich   +26 more
core   +2 more sources

Comparison of time/phase lags in the hard state and plateau state of GRS 1915+105 [PDF]

, 2013
We investigate the complex behavior of energy- and frequency-dependent time/phase lags in the plateau state and the radio-quiet hard state of GRS 1915+105.
Misra, Ranjeev, Neilsen, Joseph, Pahari, Mayukh, Uttley, Phil, Yadav, J S   +4 more
core   +2 more sources

Dynamical and topological properties of the spin angular momenta in general electromagnetic fields

Communications Physics, 2023
Spin angular momenta play important roles in light–matter interactions, leading to the emergence of the spin Hall effect and topological quasiparticles in modern optics.
Peng Shi, Luping Du, Aiping Yang, Xiaojin Yin, Xinrui Lei, Xiaocong Yuan   +5 more
doaj   +1 more source

High-energy sources at low radio frequency : the Murchison Widefield Array view of Fermi blazars [PDF]

, 2016
This is the accepted version of the following article: Giroletti, M. et al., A&A, 588 (2016) A141, which has been published in final form at DOI: http://dx.doi.org/10.1051/0004-6361/201527817.
A. A. Deshpande, A. E. E. Rogers, A. Ewall-Rice, A. R. Offringa, A. R. Whitney, A. Roshi, A. Williams, Abdo, Acero, Ackermann, Ackermann, Ackermann, B. E. Corey, B. J. Hazelton, B. M. Gaensler, B. McKinley, B. Pindor, Bock, C. J. Lonsdale, C. L. Williams, Chhetri, Cohen, Condon, D. A. Mitchell, D. Burlon, D. Emrich, D. Jacobs, D. L. Kaplan, D. Oberoi, E. Kratzenberg, E. Lenc, E. Morgan, F. Briggs, F. Massaro, Fossati, G. Bernardi, Ghirlanda, Ghirlanda, Giommi, Heald, Hurley-Walker, J. C. Kasper, J. D. Bowman, J. Morgan, J. Riding, K. S. Srivani, Komatsu, L. Feng, L. Hindson, L. J. Greenhill, M. Bell, M. F. Morales, M. Giroletti, M. J. Lynch, M. Johnston-Hollitt, M. Waterson, Mahony, Massardi, Massaro, Massaro, Massaro, Massaro, Massaro, Mauch, Meyer, Murphy, N. Hurley-Walker, N. Kudryavtseva, N. Udaya Shankar, Nolan, Nori, P. Procopio, Pavlidou, Potter, R. B. Wayth, R. Bhat, R. D’Abrusco, R. Goeke, R. J. Cappallo, R. L. Webster, R. Lico, R. Subrahmanyan, S. J. Tingay, S. M. Ord, S. R. McWhirter, T. Prabu, Taylor, Tingay, Urry, V. Pavlidou, van Haarlem, Wayth   +91 more
core   +7 more sources

Tracing Ghost Cavities with Low Frequency Radio Observations [PDF]

, 2006
We present X-ray and multi-frequency radio observations of the central radio sources in several X-ray cavity systems. We show that targeted radio observations are key to determining if the lobes are being actively fed by the central AGN.
A.C. Fabian, A.C. Fabian, B.R. McNamara, C.L. Sarazin, C.P. O’Dea, E.L. Blanton, J.R. Peterson, P. Parma, R.P. Kraft, S. Heinz, T.A. Ensslin, T.E. Clarke, W.R. Oegerle, Y.-Y. Choi, Z. Huang   +14 more
core   +4 more sources

Laser radio transmitter

, 2019
Since the days of Hertz, radio transmitters have evolved from rudimentary circuits emitting around 50 MHz to modern ubiquitous Wi-Fi devices operating at gigahertz radio bands.
Belyanin, Alexey, Capasso, Federico, Chevalier, Paul, Connors, Michael K., McNulty, Daniel, Piccardo, Marco, Rubin, Noah A., Schwarz, Benedikt, Tamagnone, Michele, Wang, Christine A., Wang, Yongrui   +10 more
core   +2 more sources

The radio-frequency quadrupole

, 2013
Radio-frequency quadrupole (RFQ) linear accelerators appeared on the accelerator scene in the late 1970s and have since revolutionized the domain of low-energy proton and ion acceleration.
Vretenar, Maurizio
core   +1 more source

Radio frequency science considerations [PDF]

, 1974
Use of the 400 MHz telecommunications system to obtain scientific information, to provide backup information for the experiments flown, and to obtain measurements which aid in designing future probes is considered.
Croft, T. A.
core   +1 more source

Radio Polarization of BL Lacertae objects

, 2006
In this paper, using the database of the university of Michigan Radio Astronomy Observatory (UMRAO) at three (4.8 GHz, 8 GHZ, and 14.5 GHz) radio frequencies, we studied the polarization properties for 47 BL Lacertae objects(38 radio selected BL Lacertae
Fan, Jun-Hui, Hua, Tong-Xu, Huang, Yong, Liu, Yi, Su, Jiang-Bo, Wang, Yong-Xiang, Yang, Jiang-He, Yuan, Yu-Hai, Zhang, Yong-Wei   +8 more
core   +2 more sources

Frequencies for Radio Astronomy [PDF]

Nature, 1970
At present the scope of research in radio astronomy is limited by the allocation of frequencies, some of which have to be shared with other radio services. When the International Telecommunications Union reconsiders all frequency allocations next year, astronomers are hoping for an improvement.
openaire   +2 more sources