Scale Dependence of Dark Energy Antigravity

Details Scale Dependence of Dark Energy Antigravity Scale Dependence of Dark Energy Antigravity

2001-06-25

arxiv.org/abs/astro-ph/0106437v1

Astronomy and Astrophysics

Astrophysics

Contributed talk at the 2nd Hellenic Cosmology Workshop at NOA (Athens) Jan. 2001.To appear in the proceedings. Based on work

Scientific paper

We investigate the effects of negative pressure induced by dark energy (cosmological constant or quintessence) on the dynamics at various astrophysical scales. Negative pressure induces a repulsive term (antigravity) in Newton's law which dominates on large scales. Assuming a value of the cosmological constant consistent with the recent SnIa data we determine the critical scale $r_c$ beyond which antigravity dominates the dynamics ($r_c \sim 1Mpc $) and discuss some of the dynamical effects implied. We show that dynamically induced mass estimates on the scale of the Local Group and beyond are significantly modified due to negative pressure. We also briefly discuss possible dynamical tests (eg effects on local Hubble flow) that can be applied on relatively small scales (a few $Mpc$) to determine the density and equation of state of dark energy.

Affiliated with

Also associated with

No associations

Rating

Scale Dependence of Dark Energy Antigravity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Scale Dependence of Dark Energy Antigravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scale Dependence of Dark Energy Antigravity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-193707