Radio Continuum Surveys with Square Kilometre Array Pathfinders

Norris, R. P.; Afonso, J.; Bacon, David; Beck, Rainer; Bell, M. E.; Beswick, R.; Best, P. N.; Bhatnagar, S.; Bonafede, A.; Brunetti, G.; Budavàri, Tamás; Cassano, R.; Condon, J. J.; Cress, C. M.; Dabbech, Arwa; Feain, Ilana; Fender, R. P.; Ferrari, C.; Gaensler, B. M.; Giovannini, G.; Haverkorn, M.; Heald, G.; Heyden, K. van der; Hopkins, A. M.; Jarvis, Matt J.; Johnston‐Hollitt, M.; Kothes, R.; Langevelde, H. J. van; Lazio, Joseph; Mao, Minnie; Martínez‐Sansigre, Alejo; Mary, David; McAlpine, K.; Middelberg, E.; Murphy, E. J.; Padovani, P.; Paragi, Z.; Prandoni, I.; Raccanelli, Alvise; Rigby, E.; Roseboom, I. G.; Röttgering, H. J. A.; Sabater, J.; Salvato, M.; Scaife, Anna M. M.; Schilizzi, R. T.; Seymour, N.; Smith, Dan; Umana, G.; Zhao, Gong-Bo; Zinn, Peter

doi:10.1017/pas.2012.020

Cited by 90 publications

(42 citation statements)

References 457 publications

(669 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These data are sufficient to detect radio-bright X-ray sources, although the majority of the X-ray source population is ≈ 1-2 orders of magnitude fainter than the sensitivity of NVSS and FIRST. However, substantially deeper radio surveys are now being undertaken over > ∼ 1,000 deg 2 and many aim to cover the majority of the visible sky (e.g., at low < ∼ 200 MHz frequencies: GMRT-TGSS; LOFAR; MWA; at mid ≈ 1 GHz frequencies: Apertif-WODAN; ASKAP-EMU; MeerKAT-MIGHTEE; VLA-VLASS; see Norris et al 2011Norris et al , 2013Lazio et al 2014 for a recent summary). Many of these surveys are pre-cursors and pathfinders to the Square Kilometer Array (SKA; e.g., Dewdney et al 2009;Carilli 2014), an international project to build the world's largest radio telescope, planned to start operations over the next ≈ 10-20 yr.…”

Section: Infrared-radio Wavelengthsmentioning

confidence: 99%

Cosmic X-ray surveys of distant active galaxies

Brandt

Alexander

2015

Astron Astrophys Rev

324

227

View full text Add to dashboard Cite

We review results from cosmic X-ray surveys of active galactic nuclei (AGNs) over the past ≈ 15 yr that have dramatically improved our understanding of growing supermassive black holes in the distant universe. First, we discuss the utility of such surveys for AGN investigations and the capabilities of the missions making these surveys, emphasizing Chandra, XMM-Newton, and NuSTAR. Second, we briefly describe the main cosmic X-ray surveys, the essential roles of complementary multiwavelength data, and how AGNs are selected from these surveys. We then review key results from these surveys on the AGN population and its evolution ("demographics"), the physical processes operating in AGNs ("physics"), and the interactions between AGNs and their environments ("ecology"). We conclude by describing some significant unresolved questions and prospects for advancing the field.

show abstract

Section: Infrared-radio Wavelengthsmentioning

confidence: 99%

Cosmic X-ray surveys of distant active galaxies

Brandt

Alexander

2015

Astron Astrophys Rev

324

227

View full text Add to dashboard Cite

show abstract

“…On the other hand, radio surveys over large areas but with shallower depth and/or lower angular resolution than the 3 GHz COSMOS data (we recall that we have  0. 75 resolution and 2.3 μJy rms at 3 GHz, equivalent to 4.3 μJy at 1.4 GHz for a = 0.8) like the EMU survey with ASKAP at 1.4 GHz, LOFAR low frequency surveys, and even MIGHTEE from MeerKAT-see details in Norris et al (2013) for all of these-would be substantially less efficient in finding > z 2.5-3 clusters. ALMA interferometric imaging (Figure 1 and Table 1) will provide efficient screening of radio-selected high-z cluster candidates, confirming the high galaxy SFRs and their distances (the radio to submillimeter flux ratio is a rough redshift indicator; Carilli & Yun 1999).…”

Section: Discussionmentioning

confidence: 99%

Radio Selection of the Most Distant Galaxy Clusters

Daddi

Jin

Strazzullo

et al. 2017

ApJL

View full text Add to dashboard Cite

We show that the most distant X-ray-detected cluster known to date, ClJ1001 at = z 2.506 spec , hosts a strong overdensity of radio sources. Six of them are individually detected (within  10 ) in deep  0. 75 resolution VLA 3 GHz imaging, with m > S 8 Jy 3 GHz. Of the six, an active galactic nucleus (AGN) likely affects the radio emission in two galaxies, while star formation is the dominant source powering the remaining four. We searched for cluster candidates over the full COSMOS 2 deg 2 field using radio-detected 3 GHz sources and looking for peaks in S 5 density maps. ClJ1001 is the strongest overdensity by far with s >10 , with a simple > z 1.5 phot preselection. A cruder photometric rejection of < z 1 radio foregrounds leaves ClJ1001 as the second strongest overdensity, while even using all radio sources ClJ1001 remains among the four strongest projected overdensities. We conclude that there are great prospects for future deep and wide-area radio surveys to discover large samples of the first generation of forming galaxy clusters. In these remarkable structures, widespread star formation and AGN activity of massive galaxy cluster members, residing within the inner cluster core, will ultimately lead to radio continuum as one of the most effective means for their identification, with detection rates expected in the ballpark of 0.1-1 per square degree at  z 2.5. Samples of hundreds such high-redshift clusters could potentially constrain cosmological parameters and test cluster and galaxy formation models.

show abstract

“…The black line represents the formula proposed by Condon (2002) which is reported together with the fitted relation in the bottom left corner. We also plot in magenta the expected sensitivity of different surveys: the SKA1-MID all-sky, wide, deep, and ultra-deep surveys (Prandoni & Seymour 2015), the WSRT Apertif survey (Norris et al 2013), the ASKAP MIGHTEE survey (Jarvis et al 2016), the ASKAP EMU survey (Norris et al 2011), and the VLA VLASS (Lacy et al 2016).…”

Section: The Confusion Limit In Total Intensity Q and U Stokes Paramentioning

confidence: 99%

“…They have been fitted with the relations reported in the bottom left corner of the plot. We also plot in magenta the expected sensitivity of different surveys: the all-sky, wide, deep, and ultra-deep SKA1-MID surveys (Prandoni & Seymour 2015), the WSRT Apertif survey (Norris et al 2013), the ASKAP MIGHTEE survey (Jarvis et al 2016), the ASKAP POSSUM (Gaensler et al 2010) surveys.…”

Section: The Confusion Limit In Total Intensity Q and U Stokes Paramentioning

confidence: 99%

Simulations of the polarized radio sky and predictions on the confusion limit in polarization for future radio surveys

Loi

Murgia

Govoni

et al. 2019

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

Numerical simulations offer the unique possibility to forecast the results of surveys and targeted observations that will be performed with next generation instruments like the Square Kilometre Array. In this paper, we investigate for the first time how future radio surveys in polarization will be affected by confusion noise. To do this, we produce 1.4 GHz simulated full-Stokes images of the extra-galactic sky by modelling various discrete radio sources populations. The results of our modelling are compared to data in the literature to check the reliability of our procedure. We also estimate the number of polarized sources detectable by future surveys. Finally, from the simulated images we evaluate the confusion limits in I, Q, and U Stokes parameters, giving analytical formulas of their behaviour as a function of the angular resolution.

show abstract

Radio Continuum Surveys with Square Kilometre Array Pathfinders

Abstract: In the lead-up to the Square Kilometre Array (SKA) project, several next-generation radio telescopes and upgrades are already being built around the world. These include APERTIF (The Netherlands), ASKAP (Australia), e-MERLIN

Cited by 90 publications

References 457 publications

Cosmic X-ray surveys of distant active galaxies

Cosmic X-ray surveys of distant active galaxies

Radio Selection of the Most Distant Galaxy Clusters

Simulations of the polarized radio sky and predictions on the confusion limit in polarization for future radio surveys

Contact Info

Product

Resources

About