R. C. Butler
A5079021881- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Dark Matter and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Scientific Research and Discoveries
- Particle Detector Development and Performance
- Superconducting and THz Device Technology
- Stellar, planetary, and galactic studies
- Nuclear Physics and Applications
- Calibration and Measurement Techniques
- Astronomical Observations and Instrumentation
- Relativity and Gravitational Theory
- Astro and Planetary Science
- Advanced Thermodynamic Systems and Engines
- Radiation Detection and Scintillator Technologies
- Adaptive optics and wavefront sensing
- Geophysics and Gravity Measurements
- Radioactive Decay and Measurement Techniques
- Spacecraft and Cryogenic Technologies
- Atmospheric Ozone and Climate
National Institute for Astrophysics
2013-2022
Osservatorio di Astrofisica e Scienza dello Spazio
2018-2021
Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
2008-2021
Institute for Space Astrophysics and Planetology
2009-2018
Czech Technical University in Prague
2018
Kazan Federal University
2018
Carnegie Observatories
2014
Carnegie Institution for Science
2014
Agenzia Spaziale Italiana
1991-2012
Aalto University
2012
We present cosmological parameter results from the final full-mission Planck measurements of CMB anisotropies. find good consistency with standard spatially-flat 6-parameter $\Lambda$CDM cosmology having a power-law spectrum adiabatic scalar perturbations (denoted "base $\Lambda$CDM" in this paper), polarization, temperature, and lensing, separately combination. A combined analysis gives dark matter density $\Omega_c h^2 = 0.120\pm 0.001$, baryon $\Omega_b 0.0224\pm 0.0001$, spectral index...
We present results based on full-mission Planck observations of temperature and polarization anisotropies the CMB. These data are consistent with six-parameter inflationary LCDM cosmology. From lensing data, for this cosmology we find a Hubble constant, H0= (67.8 +/- 0.9) km/s/Mpc, matter density parameter Omega_m = 0.308 0.012 scalar spectral index n_s 0.968 0.006. (We quote 68% errors measured parameters 95% limits other parameters.) Combined LFI measurements lead to reionization optical...
We present the first results based on Planck measurements of CMB temperature and lensing-potential power spectra. The spectra at high multipoles are extremely well described by standard spatially-flat six-parameter LCDM cosmology. In this model data determine cosmological parameters to precision. find a low value Hubble constant, H0=67.3+/-1.2 km/s/Mpc matter density parameter, Omega_m=0.315+/-0.017 (+/-1 sigma errors) in excellent agreement with constraints from baryon acoustic oscillation...
We report on the implications for cosmic inflation of 2018 Release Planck CMB anisotropy measurements. The results are fully consistent with two previous cosmological releases, but have smaller uncertainties thanks to improvements in characterization polarization at low and high multipoles. temperature, polarization, lensing data determine spectral index scalar perturbations be $n_\mathrm{s}=0.9649\pm 0.0042$ 68% CL show no evidence a scale dependence $n_\mathrm{s}.$ Spatial flatness is...
The ESA's Planck satellite, dedicated to studying the early Universe and its subsequent evolution, was launched 14 May 2009 has been scanning microwave submillimetre sky continuously since 12 August 2009. This paper gives an overview of mission performance, processing, analysis, characteristics data, scientific results, science data products papers in release. include maps CMB diffuse extragalactic foregrounds, a catalogue compact Galactic sources, list sources detected through SZ effect....
We present the implications for cosmic inflation of Planck measurements microwave background (CMB) anisotropies in both temperature and polarization based on full survey, which includes more than twice integration time nominal survey used 2013 release papers. The mission data a first large angular scales measure spectral index curvature perturbations to be ns = 0.968 ± 0.006 tightly constrain its scale dependence dns/ dlnk −0.003 0.007 when combined with lensing likelihood. When high-ℓ are...
The European Space Agency's Planck satellite, which was dedicated to studying the early Universe and its subsequent evolution, launched on 14 May 2009. It scanned microwave submillimetre sky continuously between 12 August 2009 23 October 2013, producing deep, high-resolution, all-sky maps in nine frequency bands from 30 857GHz. This paper presents cosmological legacy of Planck, currently provides our strongest constraints parameters standard model some tightest limits available deviations...
We present the all-sky Planck catalogue of Sunyaev-Zeldovich (SZ) sources detected from 29 month full-mission data. The (PSZ2) is largest SZ-selected sample galaxy clusters yet produced and deepest clusters. It contains 1653 detections, which 1203 are confirmed with identified counterparts in external data-sets, first cluster survey containing > $10^3$ a detailed analysis selection function terms its completeness statistical reliability, placing lower limit 83% on purity. Using simulations,...
We analyse the implications of Planck data for cosmic inflation. The nominal mission temperature anisotropy measurements, combined with WMAP large-angle polarization, constrain scalar spectral index to $n_s = 0.9603 \pm 0.0073$, ruling out exact scale invariance at over 5 $\sigma$. establishes an upper bound on tensor-to-scalar ratio r < 0.11 (95% CL). thus shrink space allowed standard inflationary models, preferring potentials V" 0. Exponential potential simplest hybrid and monomial models...
Author(s): Aghanim, N; Akrami, Y; Ashdown, M; Aumont, J; Baccigalupi, C; Ballardini, Banday, AJ; Barreiro, RB; Bartolo, Basak, S; Battye, R; Benabed, K; Bernard, JP; Bersanelli, Bielewicz, P; Bock, JJ; Bond, JR; Borrill, Bouchet, FR; Boulanger, F; Bucher, Burigana, Butler, RC; Calabrese, E; Cardoso, JF; Carron, Challinor, A; Chiang, HC; Chluba, Colombo, LPL; Combet, Contreras, D; Crill, BP; Cuttaia, De Bernardis, Zotti, G; Delabrouille, Delouis, JM; DI Valentino, DIego, Dore, O; Douspis,...
The European Space Agency's Planck satellite, dedicated to studying the early Universe and its subsequent evolution, was launched 14~May 2009 scanned microwave submillimetre sky continuously between 12~August 23~October 2013. In February~2015, ESA Collaboration released second set of cosmology products based on data from entire mission, including both temperature polarization, along with a scientific technical papers web-based explanatory supplement. This paper gives an overview main...
We report the results of a joint analysis data from BICEP2/Keck Array and Planck. BICEP2 Keck have observed same approximately 400 deg$^2$ patch sky centered on RA 0h, Dec. $-57.5\deg$. The combined maps reach depth 57 nK deg in Stokes $Q$ $U$ band at 150 GHz. Planck has full polarization seven frequencies 30 to 353 GHz, but much less deeply any given region (1.2 $\mu$K 143 GHz). detect 150$\times$353 cross-correlation $B$-modes high significance. fit single- cross-frequency power spectra...
We describe the legacy Planck cosmic microwave background (CMB) likelihoods derived from 2018 data release. The overall approach is similar in spirit to one retained for 2013 and 2015 release, with a hybrid method using different approximations at low ( ℓ < 30) high ≥ multipoles, implementing several methodological data-analysis refinements compared previous releases. With more realistic simulations, better correction modelling of systematic effects, we can now make full use CMB...
This paper presents the Planck 2015 likelihoods, statistical descriptions of 2-point correlations CMB data, using hybrid approach employed previously: pixel-based at $\ell<30$ and a Gaussian approximation to distribution spectra higher $\ell$. The main improvements are use more better processed data polarization detailed foreground instrumental models, allowing further checks enhanced immunity systematics. Progress in modelling enables larger sky fraction. Improvements processing models...
We study the implications of Planck data for models dark energy (DE) and modified gravity (MG), beyond cosmological constant scenario. start with cases where DE only directly affects background evolution, considering Taylor expansions equation state, principal component analysis parameterizations related to potential a minimally coupled scalar field. When estimating density at early times, we significantly improve present constraints. then move general or MG perturbations that encompass both...
We present cluster counts and corresponding cosmological constraints from the Planck full mission data set. Our catalogue consists of 439 clusters detected via their Sunyaev-Zeldovich (SZ) signal down to a signal-to-noise ratio 6, is more than factor 2 larger 2013 cosmology sample. The are consistent with those yield compatible under same modelling assumptions. Taking advantage catalogue, we extend our analysis two-dimensional distribution in redshift signal-to-noise. use mass estimates two...
We present constraints on cosmological parameters using number counts as a function of redshift for sub-sample 189 galaxy clusters from the Planck SZ (PSZ) catalogue. The PSZ is selected through signature Sunyaev--Zeldovich (SZ) effect, and used here has signal-to-noise threshold seven, with each object confirmed cluster all but one estimate. discuss completeness sample our construction likelihood analysis. Using relation between mass $M$ signal $Y$ calibrated to X-ray measurements, we...
The two fundamental assumptions of the standard cosmological model - that initial fluctuations are statistically isotropic and Gaussian rigorously tested using maps cosmic microwave background (CMB) anisotropy from Planck satellite. Deviations isotropy have been found demonstrated to be robust against component separation algorithm, mask choice frequency dependence. Many these anomalies were previously observed in WMAP data, now confirmed at similar levels significance (about 3 sigma)....