Richard D. E. Saunders

University of Cambridge

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Keith Grainge

University of Manchester

A. Lasenby

University of Cambridge

Elizabeth Waldram

University of Cambridge

Paul F. Scott

University of Cambridge

G. G. Pooley

University of Cambridge

N. Hurley‐Walker

Curtin University

R. Rébolo

Universidad de La Laguna

Anna M. M. Scaife

University of Manchester

J. A. Rubiño-Martín

Instituto de Astrofísica de Canarias

Carmen Rodríguez‐Gonzálvez

Institute of Cancer Research

Cooperative Institutions

Centre National de la Recherche Scientifique

290

University of Cambridge

198

Université Paris Cité

128

Université Paris-Saclay

California Institute of Technology

Sorbonne Paris Cité

University of California, Berkeley

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Agenzia Spaziale Italiana

Délégation Paris 7

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9C survey at 15GHz (Waldram+, 2003)

Keith Grainge Elizabeth Waldram G. G. Pooley K. Grainge M E Jones

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VizieR Online Data Catalog: Planck Sunyaev-Zeldovich sources (PSZ2) (Planck+, 2016)

yCat (2017)

P. A. R. Ade N. Aghanim M. Arnaud M. Ashdown J. Aumont

3 - prodotto gia presente in altro archivio Open Access, es. VizieR (allegare file read.me al passo 5-Carica)

Planck time

Planck energy

10.26093/cds/vizier.35940027

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VizieR Online Data Catalog: 9C survey at 15GHz (Waldram+, 2003)

VizieR Online Data Catalog (2003)

E. M. Waldram G. G. Pooley Keith Grainge Megan Jones Richard D. E. Saunders

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AMI-LA radio continuum observations of Spitzer c2d small clouds and cores: Perseus region★

Monthly Notices of the Royal Astronomical Society (2011)

Anna M. M. Scaife J. Hatchell Matthew L. Davies Thomas M. O. Franzen Keith Grainge

We present deep radio continuum observations of the cores identified as deeply embedded young stellar objects in the Perseus molecular cloud by the Spitzer c2d programme at a wavelength of 1.8 cm with the Arcminute Microkelvin Imager Large Array (AMI-LA). We detect 72% of Class 0 objects from this sample and 31% of Class I objects. No starless cores are detected. We use the flux densities measured from these data to improve constraints on the correlations between radio luminosity and bolometric luminosity, infrared luminosity and, where measured, outflow force. We discuss the differing behaviour of these objects as a function of protostellar class and investigate the differences in radio emission as a function of core mass. Two of four possible very low luminosity objects (VeLLOs) are detected at 1.8 cm.

Young stellar object

Outflow

10.1111/j.1365-2966.2011.18755.x

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Citations (18)

Rapporteur report: Weak field interactions in the central nervous system

Radiation Protection Dosimetry (2003)

Richard D. E. Saunders

Experimental evidence was presented of the interaction of extremely low frequency (ELF) physiologically weak electric fields (that is, internal fields of around 1-1000 mV m(-1)) with tissues of the central nervous system and the consequences of this for visual and cognitive function. These internal fields are higher than those induced in the body by exposure to environmental EMFs, but are small compared to nerve excitation thresholds. Two papers considered the effect of weak electric fields directly applied to hippocampal tissue in vitro on neuronal excitability assessed from evoked responses and on the modulation of neural network activity involving large numbers of individual neurons. A review was presented of the effects on electrical measures of perceptual and cognitive processes and on the performance of various behavioural tasks in volunteers exposed to electromagnetic fields. Finally, two papers addressed the visual perception of flickering light--phosphenes--in volunteers exposed to ELF magnetic fields. The first examined possible physiological origins of this phenomenon and the second assessed the induced electric fields and currents in the retina, using complex dosimetric modelling. These papers were discussed in several plenary sessions and in one breakout group, all of which are briefly summarised in this report.

Phosphene

Extremely low frequency

10.1093/oxfordjournals.rpd.a006372

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Citations (17)

VizieR Online Data Catalog: Updated Planck catalogue PSZ1 (Planck+, 2015)

P. A. R. Ade N. Aghanim C. Armitage-Caplan M. Arnaud M. Ashdown

The updated Planck catalogue of SZ sources is available at PLA (http://www.sciops.esa.int/index.php?page= Planck Legacy Archive&project=planck) and the SZ cluster database (http://szcluster-db.ias.u-psud.fr). The updated PSZ1 gathers in a single table all the entries of the delivered catalogue mainly based on the Planck data and the entries of the external validation information based on ancillary data (Appendices B and C of Planck Collaboration et al. (2014A&A...571A..29P, Cat. VIII/91), respectively). It also contains additional entries. The updated catalogue contains, when available, cluster external identifications8 and consolidated redshifts. We added two new entries: the redshift type and the bibliographic reference. (2 data files).

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Planck length

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AMI radio continuum observations of young stellar objects with known outflows★

Monthly Notices of the Royal Astronomical Society (2012)

Rachael Ainsworth Anna M. M. Scaife T. P. Ray Jane Buckle Matthew L. Davies

We present 16 GHz (1.9 cm) deep radio continuum observations made with the Arcminute Microkelvin Imager (AMI) of a sample of low-mass young stars driving jets. We combine these new data with archival information from an extensive literature search to examine spectral energy distributions (SEDs) for each source and calculate both the radio and sub-mm spectral indices in two different scenarios: (1) fixing the dust temperature (Td) according to evolutionary class; (2) allowing Td to vary. We use the results of this analysis to place constraints on the physical mechanisms responsible for the radio emission. From AMI data alone, as well as from model fitting to the full SED in both scenarios, we find that 80 per cent of the objects in this sample have spectral indices consistent with free-free emission. We find an average spectral index in both Td scenarios consistent with free-free emission. We examine correlations of the radio luminosity with bolometric luminosity, envelope mass, and outflow force and find that these data are consistent with the strong correlation with envelope mass seen in lower luminosity samples. We examine the errors associated with determining the radio luminosity and find that the dominant source of error is the uncertainty on the opacity index, beta. We examine the SEDs for variability in these young objects, and find evidence for possible radio flare events in the histories of L1551 IRS 5 and Serpens SMM 1.

Spectral index

Opacity

Flare

Young stellar object

Serpens

Outflow

Radio spectrum

Spectral energy distribution

10.1111/j.1365-2966.2012.20935.x

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Citations (20)

Planck 2015 results. XXVII. The Second Planck Catalogue of Sunyaev-Zeldovich Sources

Institutional Repository of the University of Granada (University of Granada) (2015)

P. A. R. Ade N. Aghanim M. Arnaud M. Ashdown J. Aumont

We present the all-sky Planck catalogue of Sunyaev-Zeldovich (SZ) sources detected from the 29 month full-mission data. The catalogue (PSZ2) is the largest SZ-selected sample of galaxy clusters yet produced and the deepest all-sky catalogue of galaxy clusters. It contains 1653 detections, of which 1203 are confirmed clusters with identified counterparts in external data-sets, and is the first SZ-selected cluster survey containing > $10^3$ confirmed clusters. We present a detailed analysis of the survey selection function in terms of its completeness and statistical reliability, placing a lower limit of 83% on the purity. Using simulations, we find that the Y5R500 estimates are robust to pressure-profile variation and beam systematics, but accurate conversion to Y500 requires. the use of prior information on the cluster extent. We describe the multi-wavelength search for counterparts in ancillary data, which makes use of radio, microwave, infra-red, optical and X-ray data-sets, and which places emphasis on the robustness of the counterpart match. We discuss the physical properties of the new sample and identify a population of low-redshift X-ray under- luminous clusters revealed by SZ selection. These objects appear in optical and SZ surveys with consistent properties for their mass, but are almost absent from ROSAT X-ray selected samples.

ROSAT

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Citations (408)

Planck2015 results

Astronomy and Astrophysics (2015)

P. A. R. Ade N. Aghanim M. Arnaud M. Ashdown J. Aumont

ROSAT

10.1051/0004-6361/201525823

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Citations (1,239)

A joint analysis of AMI and CARMA observations of the recently discovered SZ galaxy cluster system AMI-CL J0300+2613

Monthly Notices of the Royal Astronomical Society (2013)

A. C. T. W. Shimwell John M. Carpenter F. Feroz K. Grainge M. P. Hobson

We present CARMA observations of a massive galaxy cluster discovered in the AMI blind SZ survey. Without knowledge of the cluster redshift a Bayesian analysis of the AMI, CARMA and joint AMI & CARMA uv-data is used to quantify the detection significance and parameterise both the physical and observational properties of the cluster whilst accounting for the statistics of primary CMB anisotropies, receiver noise and radio sources. The joint analysis of the AMI & CARMA uv-data was performed with two parametric physical cluster models: the {\beta}-model; and the model described in Olamaie et al. 2012 with the pressure profile fixed according to Arnaud et al. 2010. The cluster mass derived from these different models is comparable but our Bayesian evidences indicate a preference for the {\beta}-profile which we, therefore, use throughout our analysis. From the CARMA data alone we obtain a Bayesian probability of detection ratio of 12.8:1 when assuming that a cluster exists within our search area; alternatively assuming that Jenkins et al. 2001 accurately predicts the number of clusters as a function of mass and redshift, the Bayesian probability of detection is 0.29:1. From the analysis of the AMI or AMI & CARMA data the probability of detection ratio exceeds 4.5x10^3:1. Performing a joint analysis of the AMI & CARMA data with a physical cluster model we derive the total mass internal to r200 as MT,200 = 4.1x10^14Msun. Using a phenomenological {\beta}-model to quantify the temperature decrement as a function of angular distance we find a central SZ temperature decrement of 170{\mu}K in the AMI & CARMA data. The SZ decrement in the CARMA data is weaker than expected and we speculate that this is a consequence of the cluster morphology. In a forthcoming study we will assess the impact of cluster morphology on the SZ decrements that are observed with interferometers such as AMI and CARMA.

10.1093/mnras/stt873

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Citations (8)