کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1771109 | 1020726 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dark energy in the dark ages
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
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چکیده انگلیسی
Non-negligible dark energy density at high redshifts would indicate dark energy physics distinct from a cosmological constant or “reasonable” canonical scalar fields. Such dark energy can be constrained tightly through investigation of the growth of structure, with limits of â²2% of total energy density at z â«Â 1 for many models. Intermediate dark energy can have effects distinct from its energy density; the dark ages acceleration can be constrained to last less than 5% of a Hubble e-fold time, exacerbating the coincidence problem. Both the total linear growth, or equivalently Ï8, and the shape and evolution of the nonlinear mass power spectrum for z < 2 (using the Linder-White nonlinear mapping prescription) provide important windows. Probes of growth, such as weak gravitational lensing, can interact with supernovae and CMB distance measurements to scan dark energy behavior over the entire range z = 0-1100.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Astroparticle Physics - Volume 26, Issue 1, August 2006, Pages 16-21
Journal: Astroparticle Physics - Volume 26, Issue 1, August 2006, Pages 16-21
نویسندگان
Eric V. Linder,