Zobrazeno 1 - 10
of 657
pro vyhledávání: '"Kassim N"'
Typically, integrated radio frequency continuum spectra of supernova remnants (SNRs) exhibit a power-law form due to their synchrotron emission. In numerous cases, these spectra show an exponential turnover, long assumed due to thermal free-free abso
Externí odkaz:
http://arxiv.org/abs/2312.11440
Autor:
Yusef-Zadeh, F., Wardle, M., Arendt, R., Hewitt, J. W., Hu, Y., Lazarian, A., Kassim, N., Hyman, S., Heywood, I.
We present highly sensitive measurements taken with MeerKAT at 1280 MHz as well as archival GBT, MWA and VLA images at 333, 88 and 74 MHz. We report the detection of synchrotron radio emission from the infrared dark cloud (IRDC) associated with the h
Externí odkaz:
http://arxiv.org/abs/2310.19901
We present new images and continuum spectral analysis for 14 resolved Galactic SNRs selected from the 74 MHz Very Large Array Low-Frequency Sky Survey Redux (VLSSr). We combine new integrated measurements from the VLSSr with flux densities extracted
Externí odkaz:
http://arxiv.org/abs/2108.08178
Autor:
Timmerman, R., van Weeren, R. J., Callingham, J. R., Cotton, W. D., Perley, R., Morabito, L. K., Gizani, N. A. B., Bridle, A. H., O'Dea, C. P., Baum, S. A., Tremblay, G. R., Kharb, P., Kassim, N. E., Röttgering, H. J. A., Botteon, A., Sweijen, F., Tasse, C., Brüggen, M., Moldon, J., Shimwell, T., Brunetti, G.
The prominent radio source Hercules A features complex structures in its radio lobes. Although it is one of the most comprehensively studied sources in the radio sky, the origin of the ring structures in the Hercules A radio lobes remains an open que
Externí odkaz:
http://arxiv.org/abs/2108.07287
Autor:
Kirsten, F., Marcote, B., Nimmo, K., Hessels, J. W. T., Bhardwaj, M., Tendulkar, S. P., Keimpema, A., Yang, J., Snelders, M. P., Scholz, P., Pearlman, A. B., Law, C. J., Peters, W. M., Giroletti, M., Paragi, Z., Bassa, C., Hewitt, D. M., Bach, U., Bezrukovs, V., Burgay, M., Buttaccio, S. T., Conway, J. E., Corongiu, A., Feiler, R., Forssén, O., Gawroński, M. P., Karuppusamy, R., Kharinov, M. A., Lindqvist, M., Maccaferri, G., Melnikov, A., Ould-Boukattine, O. S., Possenti, A., Surcis, G., Wang, N., Yuan, J., Aggarwal, K., Anna-Thomas, R., Bower, G. C., Blaauw, R., Burke-Spolaor, S., Cassanelli, T., Clarke, T. E., Fonseca, E., Gaensler, B. M., Gopinath, A., Kaspi, V. M., Kassim, N., Lazio, T. J. W., Leung, C., Li, D. Z., Lin, H. H., Masui, K. W., Mckinven, R., Michilli, D., Mikhailov, A., Ng, C., Orbidans, A., Pen, U. L., Petroff, E., Rahman, M., Ransom, S. M., Shin, K., Smith, K. M., Stairs, I. H., Vlemmings, W.
Fast radio bursts (FRBs) are exceptionally luminous flashes of unknown physical origin, reaching us from other galaxies (Petroff et al. 2019). Most FRBs have only ever been seen once, while others flash repeatedly, though sporadically (Spitler et al.
Externí odkaz:
http://arxiv.org/abs/2105.11445
Autor:
Hyman, S. D., Frail, D. A., Deneva, J. S., Kassim, N. E., Giacintucci, S., Kooi, J. E., Lazio, T. J. W., Joyner, I., Peters, W. M., Gajjar, V., Siemion, A. P. V.
From an on-going survey of the Galactic bulge, we have discovered a number of compact, steep spectrum radio sources. In this present study we have carried out more detailed observations for two of these sources, located 43 arcmin and 12.7 deg from th
Externí odkaz:
http://arxiv.org/abs/2105.03282
Autor:
Anderson, M. M., Hallinan, G., Eastwood, M. W., Monroe, R. M., Callister, T. A., Dowell, J., Hicks, B., Huang, Y., Kassim, N. E., Kocz, J., Lazio, T. J. W., Price, D. C., Schinzel, F. K., Taylor, G. B.
Publikováno v:
ApJ, 2019 November, Volume 886, Number 2
We present the results of the first transient survey from the Owens Valley Radio Observatory Long Wavelength Array (OVRO-LWA) using 31 hr of data, in which we place the most constraining limits on the instantaneous transient surface density at timesc
Externí odkaz:
http://arxiv.org/abs/1911.04591
Autor:
Lacy, M., Baum, S. A., Chandler, C. J., Chatterjee, S., Clarke, T. E., Deustua, S., English, J., Farnes, J., Gaensler, B. M., Gugliucci, N., Hallinan, G., Kent, B. R., Kimball, A., Law, C. J., Lazio, T. J. W., Marvil, J., Mao, S. A., Medlin, D., Mooley, K., Murphy, E. J., Myers, S., Osten, R., Richards, G. T., Rosolowsky, E., Rudnick, L., Schinzel, F., Sivakoff, G. R., Sjouwerman, L. O., Taylor, R., White, R. L., Wrobel, J., Andernach, H., Beasley, A. J., Berger, E., Bhatnagar, S., Birkinshaw, M., Bower, G. C., Brandt, W. N., Brown, S., Burke-Spolaor, S., Butler, B. J., Comerford, J., Demorest, P. B., Fu, H., Giacintucci, S., Golap, K., Guth, T., Hales, C. A., Hiriart, R., Hodge, J., Horesh, A., Ivezic, Z., Jarvis, M. J., Kamble, A., Kassim, N., Liu, X., Loinard, L., Lyons, D. K., Masters, J., Mezcua, M., Moellenbrock, G. A., Mroczkowski, T., Nyland, K., O'Dea, C. P., O'Sullivan, S. P., Peters, W. M., Radford, K., Rao, U., Robnett, J., Salcido, J., Shen, Y., Sobotka, A., Witz, S., Vaccari, M., van Weeren, R. J., Vargas, A., Williams, P. K. G., Yoon, I.
The Very Large Array Sky Survey (VLASS) is a synoptic, all-sky radio sky survey with a unique combination of high angular resolution ($\approx$2.5"), sensitivity (a 1$\sigma$ goal of 70 $\mu$Jy/beam in the coadded data), full linear Stokes polarimetr
Externí odkaz:
http://arxiv.org/abs/1907.01981
We have identified a new supernova remnant (SNR), G51.04+0.07 (G51.04), using observations at 74 MHz from the VLA Low-Frequency Sky Survey Redux. Earlier, higher frequency radio continuum, recombination line, and infrared data had correctly inferred
Externí odkaz:
http://arxiv.org/abs/1806.07452
Autor:
Kassim, N. A.1, Chung, E. L. T.1,2 ericlim@upm.edu.my, Alghirani, M. M.2, Ong, Y. L.1, Kamalludin, M. H.1,2, Jesse, F. F. Abdullah3, Loh, T. C.2
Publikováno v:
South African Journal of Animal Science. 2023, Vol. 53 Issue 5, p667-677. 11p.
