Browsing Research Articles (Physics) by Author "Camera, Stefano"
Now showing items 1-7 of 7
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Cosmology on ultralarge scales with intensity mapping of the neutral hydrogen 21 cm emission: limits on primodial non-gaussianity
Camera, Stefano; Santos, Mario G.; Ferreira, Pedro G.; Ferramacho, Luis (American Physical Society, 2013)The large-scale structure of the Universe supplies crucial information about the physical processes at play at early times. Unresolved maps of the intensity of 21 cm emission from neutral hydrogen HI at redshifts z ~ 1 − ... -
Detecting relativistic Doppler in galaxy clustering with tailored galaxy samples
Camera, Stefano; Montano, Frederico (Elsivier, 2024)We present a method to obtain a high-significance detection of relativistic effects on cosmological scales. Measurements of such effects would be instrumental for our understanding of the Universe, as they would provide ... -
Developing a unified pipeline for large-scale structure data analysis with angular power spectra – II. A case study for magnification bias and radio continuum surveys
Camera, Stefano; Tanidis, Konstantinos; Parkinson, David (Oxford University Press, 2019)Following on our purpose of developing a unified pipeline for large-scale structure data analysis with angular power spectra, we now include the weak lensing effect of magnification bias on galaxy clustering in a publicly ... -
Einstein's legacy in galaxy surveys
Camera, Stefano; Maartens, Roy; Santos, Mario G. (Oxford University Press, 2015)Non-Gaussianity in the primordial fluctuations that seeded structure formation produces a signal in the galaxy power spectrum on very large scales. This signal contains vital information about the primordial Universe, but ... -
Hunting down horizon-scale effects with multi-wavelength surveys
Fonseca, Jose; Camera, Stefano; Santos, Mario G.; Maartens, Roy (American Astronomical Society, 2015)Next-generation cosmological surveys will probe ever larger volumes of the universe, including the largest scales, near and beyond the horizon. On these scales, the galaxy power spectrum carries signatures of local primordial ... -
Non-Gaussianity constraints using future radio continuum surveys and the multitracer technique
Camera, Stefano; Gomes, Zahra; Jarvis, Matt J. (Oxford University Press, 2019)Tighter constraints on measurements of primordial non-Gaussianity (PNG) will allow the differentiation of inflationary scenarios. The cosmic microwave background bispectrum – the standard method of measuring the local ... -
Ultralarge-scale approximations and galaxy clustering: Debiasing constraints on cosmological parameters
Martinelli, Matteo; Dalal, Roohi; Camera, Stefano (Oxford University Press, 2022)Upcoming galaxy surveys will allow us to probe the growth of the cosmic large-scale structure with improved sensitivity compared to current missions, and will also map larger areas of the sky. This means that in addition ...