Suchergebnisse

We consider a minimal scale-invariant extension of the standard model of particle physics combined with unimodular gravity formulated in [M. Shaposhnikov and D. Zenhausern, Phys. Lett. B 671, 187 (2009).]. This theory is able to describe not only an inflationary stage, related to the standard model Higgs field, but also a late period of dark-energy domination, associated with an almost massless dilaton. A number of parameters can be fixed by inflationary physics, allowing us to make specific predictions for any subsequent period. In particular, we derive a relation between the tilt of the primordial spectrum of scalar fluctuations, ns, and the present value of the equation of state parameter of dark energy (DE), wDE0. We find bounds for the scalar tilt, ns<0.97, the associated running, -0.0006 -1. The relation between ns and wDE0 allows us to use the current observational bounds on ns to further constrain the dark-energy equation of state to 0<1+wDE0<0.02, which is to be confronted with future dark-energy surveys ; We acknowledge financial support from the Madrid Regional Government (CAM) under the Program No. HEPHACOS P-ESP-00346 and MICINN under Grant No. AYA2009-13936-C06-06. We also participate in the Consolider-Ingenio 2010 PAU (CSD2007-00060), as well as in the European Union Marie Curie Network UniverseNet under Contract No. MRTN-CT-2006-035863. J. R. would like to acknowledge financial support from UAM/CSIC. The work of M. S. and D. Z. was supported by the Swiss National Science Foundation and by the Tomalla Foundation

A reading of the Divina Commedia with the eyes of a modern scientist reveals that Dante devoted great attention to the description of a wide variety of natural phenomena, particularly those involving astronomy, optics and geometry. A remarkable case is the structure of the cosmos emerging from the Paradiso, which foreshadows a non-Euclidean geometrical structure with remarkable similarities to Einstein's 1917 static cosmological solution. Such model, however, as well as other solutions with positive spatial curvature, are ruled out by current astrophysical observations. Here I discuss Dante's geometric intuition and show its close analogy with the shape of the observable cosmic space-time in the standard CDM expanding model, fully supported by present-day cosmological data.

Every saga has a beginning: philosophical cosmologies in the ancient world -- The voyage home: cosmos in early Christian thought -- Resistance is futile: Galileo, Newton, and Darwin -- All these worlds: on the multiverse -- If it's just us, it seems like an awful waste of space: on human uniqueness -- Infinite space, infinite terror: our cosmic (in)significance -- In space no one can hear you scream? God and being -- There is no gene for the human spirit: images of God -- Come with me if you want to live: incarnations -- To boldly go: beings in search of greater understanding

Parallel Contributed Talk at the "XIX International Workshop on Neutrino Telescopes" on line - 18-26 February, 2021 ; in collaboration with Shashank Shalgar and Irene Tamborra based on 2012.03948 Co-financed by the Connecting Europe Facility of the European Union

Viewed as a flashpoint of the Scientific Revolution, early modern astronomy witnessed a virtual explosion of ideas about the nature and structure of the world. This study explores these theories in a variety of intellectual settings, challenging our view of modern science as a straightforward successor to Aristotelian natural philosophy. It shows how astronomers dealt with celestial novelties by deploying old ideas in new ways and identifying more subtle notions of cosmic rationality. Beginning with the celestial spheres of Peurbach and ending with the evolutionary implications of the new star.

A symposium paper on Moishe Postone's Time, Labor and Social Domination that engages with Postone's key claims about the spatial-temporal features of the "social universe" that is capital, although the spatial aspect is only inchoately examined in the book. First, Postone's central claims are described, then compared with other critiques of traditional Marxism that assert new readings of Marx along the same lines, ie, abstract labor as a mode of social mediation. The objective here is to recover some of the cosmological bases of Marx's work as well as to address those in Postone's. Links between Einstein's theory of gravity & Marx's law of value are considered in an effort to illuminate the potential extension of Marx's critique of society beyond political economy. Despite providing a useful framework for the advancement of Marxist social theory, Postone does not explore his critical political cosmology beyond a contrived reading of Newtonian time; thus his work does not transcend the pre-20th-century limitations of bourgeois materialism. 25 References. K. Coddon

This writing attempts to capture mind and matter to rational description by focusing on disparity between scientifc method as it extracts concepts and discards particulars and ordinary cognitive functioning that extends from proximal experience. Discourse underlined with the concept of strict uniqueness of world entities is intended to examine critically paradox and solution eforts in the mathematical and cosmological sciences as problems of zero, infnity: vast and small numbers and discreteness are addressed.