A 6% measurement of the Hubble parameter at z~0.45: direct evidence of the epoch of cosmic re-acceleration
| العنوان: | A 6% measurement of the Hubble parameter at z~0.45: direct evidence of the epoch of cosmic re-acceleration |
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| المؤلفون: | Claudia Maraston, Rita Tojeiro, Michele Moresco, Lucia Pozzetti, Raul Jimenez, Licia Verde, David Wilkinson, Annalisa Citro, Andrea Cimatti, Daniel Thomas |
| المساهمون: | ITA, Universitat de Barcelona, Moresco, Michele, Pozzetti, Lucia, Cimatti, Andrea, Jimenez, Raul, Maraston, Claudia, Verde, Licia, Thomas, Daniel, Citro, Annalisa, Tojeiro, Rita, Wilkinson, David, University of St Andrews. School of Physics and Astronomy |
| المصدر: | Dipòsit Digital de la UB Universidad de Barcelona Recercat. Dipósit de la Recerca de Catalunya instname Moresco, M, Pozzetti, L, Cimatti, A, Jimenez, R, Maraston, C, Verde, L, Thomas, D, Citro, A, Tojeiro, R & Wilkinson, D 2016, ' A 6% measurement of the Hubble parameter at z∼0.45 : direct evidence of the epoch of cosmic re-acceleration ', Journal of Cosmology and Astroparticle Physics, vol. 2016, no. May 2016, 014 . https://doi.org/10.1088/1475-7516/2016/05/014Test NASA Astrophysics Data System |
| بيانات النشر: | Institute of Physics (IOP), 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Astrofísica, redshift survey, Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Cosmology, Metric expansion of space, symbols.namesake, Dark energy experiments, 0103 physical sciences, QB Astronomy, 010303 astronomy & astrophysics, R2C, QC, QB, Redshift surveys, Physics, COSMIC cancer database, Cosmologia, 010308 nuclear & particles physics, Astronomy and Astrophysics, 3rd-DAS, Galaxy, Redshift, 3. Good health, Baryon, QC Physics, dark energy experiment, astro-ph.CO, symbols, Baryon acoustic oscillations, BDC, uploaded-in-3-months-elsewhere, Hubble's law, Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | Deriving the expansion history of the Universe is a major goal of modern cosmology. To date, the most accurate measurements have been obtained with Type Ia Supernovae and Baryon Acoustic Oscillations, providing evidence for the existence of a transition epoch at which the expansion rate changes from decelerated to accelerated. However, these results have been obtained within the framework of specific cosmological models that must be implicitly or explicitly assumed in the measurement. It is therefore crucial to obtain measurements of the accelerated expansion of the Universe independently of assumptions on cosmological models. Here we exploit the unprecedented statistics provided by the Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 9 to provide new constraints on the Hubble parameter $H(z)$ using the em cosmic chronometers approach. We extract a sample of more than 130000 of the most massive and passively evolving galaxies, obtaining five new cosmology-independent $H(z)$ measurements in the redshift range $0.3 Comment: 31 pages, 10 figures, 5 tables, accepted for publication inJCAP. The H(z) data can be downloaded at http://www.physics-astronomy.unibo.it/en/research/areas/astrophysics/cosmology-with-cosmic-chronometersTest |
| وصف الملف: | application/pdf; STAMPA |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f2a4eeaa7872a83c7573f8c3eb7fda9Test http://hdl.handle.net/2445/127531Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....4f2a4eeaa7872a83c7573f8c3eb7fda9 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |