Browsing by Author "Gloudemans, A. J."

Now showing items 1-5 of 5

    • Discovery of 24 radio-bright quasars at $4.9 \leq z \leq6.6$ using low-frequency radio observations 

      Gloudemans, A. J.; Duncan, K. J.; Saxena, A.; Harikane, Y.; Hill, G. J.; Zeimann, G. R.; Rottgering, H. J. A.; Yang, D.; Best, P. N.; Banados, E.; Drabent, A.; Hardcastle, M. J.; Hennawi, J. F.; Lansbury, G.; Magliocchetti, M.; Miley, G. K.; Nanni, R.; Shimwell, T. W.; Smith, D. J. B.; Venemans, B.P.; Wagenveld, J. D. (2022-12-31)
      High redshift quasars ($z>5$) that also shine brightly at radio wavelengths are unique signposts of supermassive black hole activity in the early universe. However, bright radio sources at $z\ge5$ are extremely rare and ...

    • LOFAR Properties of SILVERRUSH Lya emitter candidates in the ELAIS-N1 Field 

      Gloudemans, A. J.; Duncan, K. J.; Kondapally, R.; Sabater, J.; Cochrane, R. K.; Röttgering, H. J. A.; Best, P. N.; Bonato, M.; Bondi, M.; Malek, K.; McCheyne, I.; Smith, D. J. B.; Prandoni, I.; Wang, L. (2021-04-07)
      Lyman alpha emitters (LAEs) in the Epoch of Reionization (EoR) offer valuable probes of early galaxy evolution and the process of reionization; however, the exact evolution of their abundance and the nature of their emission ...

    • Low frequency radio properties of the $z>5$ quasar population 

      Gloudemans, A. J.; Duncan, K. J.; Röttgering, H. J. A.; Shimwell, T. W.; Venemans, B. P.; Best, P. N.; Brüggen, M.; Rivera, G. Calistro; Drabent, A.; Hardcastle, M. J.; Miley, G. K.; Schwarz, D. J.; Saxena, A.; Smith, D. J. B.; Williams, W. L. (2021-12-31)
      Optically luminous quasars at z > 5 are important probes of super-massive black hole (SMBH) formation. With new and future radio facilities, the discovery of the brightest low-frequency radio sources in this epoch would ...

    • No strong radio absorption detected in the low-frequency spectra of radio-loud quasars at z > 5.6 

      Gloudemans, A. J.; Saxena, A.; Intema, H.; Callingham, J. R.; Duncan, K. J.; Rottgering, H. J. A.; Belladitta, S.; Hardcastle, M. J.; Harikane, Y.; Spingola, C. (2023-10-12)
      We present the low-frequency radio spectra of 9 high-redshift quasars at $5.6 \leq z \leq 6.6$ using the Giant Metre Radio Telescope band-3, -4, and -5 observations ($\sim$300-1200 MHz), archival Low Frequency Array (LOFAR; ...

    • Plausible association of distant late M dwarfs with low-frequency radio emission 

      Gloudemans, A. J.; Callingham, J. R.; Duncan, K. J.; Saxena, A.; Harikane, Y.; Hill, G. J.; Zeimann, G. R.; Rottgering, H. J. A.; Hardcastle, M. J.; Pineda, J. S.; Shimwell, T. W.; Smith, D. J. B.; Wagenveld, J. D. (2023-10-17)
      We present the serendipitous discovery of eight distant (> 50 pc) late M dwarfs with plausible associated radio emission at 144 MHz. The M-dwarf nature of our sources has been confirmed with optical spectroscopy performed ...