Contact
schliessen

Filtern

 

Bibliotheken

Logo der Bibliothek

Siegel TU Braunschweig Universitätsbibliothek Braunschweig
You do not seem to be within the network of Braunschweig University.
As student, researcher or staff member of Braunschweig University you can use the VPN service to gain access to electronic publications.
Alternatively, you can use your university username and password via Shibboleth to gain access to electronic publications with certain publishers. You can find more details in our Blog (in German).

Limits of Quasi-Static Approximation in Modified-Gravity Cosmologies

We investigate the limits of applicability of the quasi-static approximation in cosmologies featuring general models of dark energy or modified gravity. We show that, at best, the quasi-static approximation breaks down outside of the sound horizon of the dark-energy, rather than the cosmological hor... Full description

Contributors: Sawicki, Ignacy | Author
Bellini, Emilio | Author
Published: 2015
Contained in: arXiv.org (2015) vom: 23. März
Journal Title: arXiv.org
Fulltext access: Fulltext access (direct link - free access) 10.1103/PhysRevD.92.084061
Availability is being checked...
Links: Volltext (dx.doi.org)
Volltext (arxiv.org)
DOI: 10.1103/PhysRevD.92.084061
Language: English
ID (e.g. DOI, URN): 10.1103/PhysRevD.92.084061
PPN (Catalogue-ID): XAR016003160
more publication details ...

Associated Publications/Volumes

  • Associated records are being queried...
more (+)
Internes Format
LEADER 02290caa a22003852 4500
001 XAR016003160
003 DE-627
005 20200512044008.0
007 cr uuu---uuuuu
008 200417s2015 xx |||||o 00| ||eng c
024 7 |a 10.1103/PhysRevD.92.084061  |2 doi 
035 |a (DE-627)XAR016003160 
035 |a (DE-599)KXPXAR016003160 
035 |a (arXiv)1503.06831 
040 |a DE-627  |b ger  |c DE-627  |e rakwb 
041 |a eng 
082 0 |a 530 
082 0 |a 530 
082 0 |a 530 
082 0 |a 530 
245 1 0 |a Limits of Quasi-Static Approximation in Modified-Gravity Cosmologies 
264 1 |c 2015 
336 |a Text  |b txt  |2 rdacontent 
337 |a Computermedien  |b c  |2 rdamedia 
338 |a Online-Ressource  |b cr  |2 rdacarrier 
520 |a We investigate the limits of applicability of the quasi-static approximation in cosmologies featuring general models of dark energy or modified gravity. We show that, at best, the quasi-static approximation breaks down outside of the sound horizon of the dark-energy, rather than the cosmological horizon as is frequently assumed. When the sound speed of dark energy is significantly below that of light, the quasi-static limit is only valid in a limited range of observable scales and this must be taken into account when computing effects on observations in such models. As an order of magnitude estimate, in the analysis of data from today's weak-lensing and peculiar-velocity surveys, dark energy can be modelled as quasi-static only if the sound speed is larger than order 1% of that of light. In upcoming surveys, such as Euclid, it should only be used when the sound speed exceeds around 10% of the speed of light. In the analysis of the cosmic microwave background, the quasi-static limit should never be used for the integrated Sachs-Wolf effect and for lensing only when the sound speed exceeds 10% of the speed of light. 
700 1 |a Sawicki, Ignacy  |e verfasserin  |4 aut 
700 1 |a Bellini, Emilio  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t arXiv.org  |g (2015) vom: 23. März 
856 4 0 |u http://dx.doi.org/10.1103/PhysRevD.92.084061  |z Lizenzpflichtig  |3 Volltext 
856 4 0 |u https://arxiv.org/abs/1503.06831  |z Kostenfrei  |3 Volltext 
912 |a GBV_XAR 
936 u w |j 2015  |b 23  |c 03 
951 |a AR 
952 |j 2015  |b 23  |c 03