600 research outputs found
Sub-percent constraints on cosmological temperature evolution
No full textThe redshift dependence of the cosmic microwave background temperature is one of the key cosmological observables. In the standard cosmological model one has T (z) = T0(1 + z), where T0 is the present-day temperature. Deviations from this behavior would imply the presence of new physics. Here we discuss how the combination of all currently available direct and indirect measurements of T (z) constrains the common phenomenological parametrization T (z) = T0(1 + z)^(1−β) , and obtain the first sub-percent constraint on the temperature growth index 1 − β. Specifically, we find β = (7.6 ± 8.0) × 10^(−3) at the 68.3% confidence level
Constraining the evolution of the CMB temperature with SZ measurements from Planck data
No full textThe CMB temperature-redshift relation, TCMB(z) = T0(1+z), is a key prediction of the standard cosmology but is violated in many non-standard models. Constraining possible
deviations from this law is an eective way to test the CDM paradigm and to search for hints of new physics. We have determined TCMB(z), with a precision up to 3%, for a
subsample (103 clusters) of the Planck SZ cluster catalog, at redshifts in the range 0.01-0.94, using measurements of the spectrum of the Sunyaev-Zel'dovich (SZ) eect obtained from
Planck temperature maps at frequencies from 70 to 353 GHz. The method adopted to provide individual determinations of TCMB(z) at cluster redshift relies on the use of SZ intensity
change, ISZ() at dierent frequencies and on a Monte Carlo Markov chain approach. By applying this method to the sample of 103 clusters, we limit possible deviations of the form
TCMB(z) = T0(1 + z)^(1-\beta) to be \beta = 0.012 +/-0.016, at 1\sigma uncertainty, consistent with the prediction of the standard model. Combining these measurements with previously published results, we get \beta = 0.013 +/- 0.011
S-Z constraints on the dependence of the CMB temperature on redshift
No full textPrecise measurements of the Sunyaev–Zel’dovich (S–Z) effect on clusters of galaxies can be used to constrain anomalous scalings of the CMB temperature as a function of redshift, providing an unbiased test of the current cosmological paradigms. This is possible through a precise characterization of the S–Z spectrum as a function of frequency and all the higher order effects which determine small corrections to the amplitude of the effect. Combined with excellent systematic modeling and high quality, routine observations of the S–Z effect on a moderate-to-high redshift sample of galaxy clusters at millimeter and submillimeter wavelengths, this method can constrain deviations from standard scalings of the CMB temperature based on zero-redshift precisions comparable with that of COBE/FIRAS. We describe here the analysis procedure and a pioneering approach to the problem using existing multifrequency S–Z observations
Studio retrospettivo sulla prevalenza di malocclusioni correlate ad abitudini di suzione non nutritiva.
No full textAbsolute calibration and beam recontruction of MITO (a ground-based instrument in the millimetric region)
No full textAn efficient sky data reconstruction derives from a precise characterization of the observing instrument. Here we describe the reconstruction of performances of a single-pixel 4-band photometer installed at MITO (Millimeter and Infrared Testagrigia Observatory) focal plane. The strategy of differential sky observations at millimeter wavelengths, by scanning the field of view at constant elevation wobbling the subreflector, induces a good knowledge of beam profile and beam-throw amplitude, allowing efficient data recovery. The problems that arise estimating the detectors throughput by drift scanning on planets are shown. Atmospheric transmission, monitored by skydip technique, is considered for deriving final responsivities for the 4 channels using planets as primary calibrators
What does the word ‘Europe’ make you think of? Conceptualisations of Europe in a local context
No full textThe present article investigates the construction of the sense of belonging toward Europe in the public sphere, employing a case-study conducted in Italy. The author argues that different conceptualisations of Europe are related to diverse “uses” of the media, familiarity with international cultural resources and participation in the transnational public sphere and civil society. These variables affect the construction of Europeans' sense of belonging
Correction: Yagüe, P., et al. Goals and Challenges in Bacterial Phosphoproteomics. Int. J. Mol. Sci. 2019, 20, 5678
No full textThe authors wish to make the following corrections to this paper [1]:The author name “Gemma Fernánez-García” should be “Gemma Fernández-García” [...
Petrarca e Osberno di Gloucester
No full textSi presenta l'edizione commentata delle note autografe di Petrarca contenute nel Par. Lat. 7492, testimonianza della lettura e dell’utilizzo delle Derivationes di Osberno di Gloucester, altrimenti mai esplicitamente menzionate altrove da Petrarca (il titolo e l’autore rimasero a lungo ignoti). In esse Petrarca indica accordi e discordanze con le Derivationes di Uguccione da Pisa.It presents the annotated edition of Petrarch's autograph notes contained in Para Lat. 7492, evidence of reading and the use of Derivationes Osberno of Gloucester, otherwise never explicitly mentioned elsewhere by Petrarch (the title and the author remained unknown for a long time). In them Petrarca indicates agreements and disagreements with the Derivationes of Huguccio
Le opere storiche di Antonio Ivani da Sarzana
No full textSi forniscono alcune osservazioni e contributi al volume Antonio Ivani da Sarzana, 'Opere storiche' in cui sono pubblicate le principali opere storiche di questo illustre umanista, scrittore prolifico impegnato attivamente nella vita civile e politica del tempo. Interessanti spunti di riflessione offre la tradizione manoscritta, in particolare per la presenza di numerosi autografi rivisti dall’autore.We provide some comments and contributions to the volume Antonio Ivani from Sarzana, 'Historical works' which are published in major historical works of this illustrious humanist, prolific writer actively involved in civic and political life of the time. Offers interesting insights into the manuscript tradition, in particular the presence of numerous autographs revised by the author
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