Journal article Open Access

Constraining Dark Energy with Type Ia Supernovae and Large-Scale Structure

Perlmutter, Saul; Turner, Michael S.; White, Martin

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<oai_dc:dc xmlns:dc="" xmlns:oai_dc="" xmlns:xsi="" xsi:schemaLocation="">
  <dc:creator>Perlmutter, Saul</dc:creator>
  <dc:creator>Turner, Michael S.</dc:creator>
  <dc:creator>White, Martin</dc:creator>
  <dc:description>Measurements of the distances to type Ia supernovae have produced strong evidence that the expansion of the Universe is accelerating, implying the existence of a nearly uniform component of dark energy with negative pressure. We show that constraints to this mysterious component based upon large-scale structure nicely complement the SN Ia data, and that together they require ${$Ω${}}_{X}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}{$ρ${}}_{X}/{$ρ${}}_{\mathrm{crit}}$𝟄${}(0.6,0.7)$ and ${w\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}p}_{X}/{$ρ${}}_{X}&lt;$-${}0.6$ ( $95%$ C.L.), for the favored flat Universe. Other cosmological data support this conclusion. The simplest explanation, a cosmological constant, is consistent with this, while some of the other possibilities are not.</dc:description>
  <dc:title>Constraining Dark Energy with Type Ia Supernovae and Large-Scale Structure</dc:title>
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