%0 Generic %1 Riess2004 %A Riess, Adam G. %A Strolger, Louis-Gregory %A Tonry, John %A Casertano, Stefano %A Ferguson, Henry C. %A Mobasher, Bahram %A Challis, Peter %A Filippenko, Alexei V. %A Jha, Saurabh %A Li, Weidong %A Chornock, Ryan %A Kirshner, Robert P. %A Leibundgut, Bruno %A Dickinson, Mark %A Livio, Mario %A Giavalisco, Mauro %A Steidel, Charles C. %A Benitez, Narciso %A Tsvetanov, Zlatan %D 2004 %K Distance Luminosity Redshift Supernovae Survey %T Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution %U http://arxiv.org/abs/astro-ph/0402512 %X We have discovered 16 Type Ia supernovae (SNe Ia) with the Hubble Space Telescope (HST) and have used them to provide the first conclusive evidence for cosmic deceleration that preceded the current epoch of cosmic acceleration. These objects, discovered during the course of the GOODS ACS Treasury program, include 6 of the 7 highest-redshift SNe Ia known, all at z>1.25, and populate the Hubble diagram in unexplored territory. The luminosity distances to these and 170 previous SNe Ia are provided. A purely kinematic interpretation of the SN Ia sample provides evidence at the > 99% confidence level for a transition from deceleration to acceleration or similarly, strong evidence for a cosmic jerk. Using a simple model of the expansion history, the transition between the two epochs is constrained to be at z=0.46 +/- 0.13. The data are consistent with the cosmic concordance model of Omega_M ~ 0.3, Omega_Lambda~0.7 (chi^2_dof=1.06), and are inconsistent with a simple model of evolution or dust as an alternative to dark energy. For a flat Universe with a cosmological constant. When combined with external flat-Universe constraints we find w=-1.02 + 0.13 - 0.19 (and $<-0.76 at the 95% confidence level) for an assumed static equation of state of dark energy, P = wc^2. Joint constraints on both the recent equation of state of dark energy, $w_0$, and its time evolution, dw/dz, are a factor of ~8 more precise than its first estimate and twice as precise as those without the SNe Ia discovered with HST. Our constraints are consistent with the static nature of and value of w expected for a cosmological constant (i.e., w_0 = -1.0, dw/dz = 0), and are inconsistent with very rapid evolution of dark energy. We address consequences of evolving dark energy for the fate of the Universe.

@misc{Riess2004, abstract = { We have discovered 16 Type Ia supernovae (SNe Ia) with the Hubble Space Telescope (HST) and have used them to provide the first conclusive evidence for cosmic deceleration that preceded the current epoch of cosmic acceleration. These objects, discovered during the course of the GOODS ACS Treasury program, include 6 of the 7 highest-redshift SNe Ia known, all at z>1.25, and populate the Hubble diagram in unexplored territory. The luminosity distances to these and 170 previous SNe Ia are provided. A purely kinematic interpretation of the SN Ia sample provides evidence at the > 99% confidence level for a transition from deceleration to acceleration or similarly, strong evidence for a cosmic jerk. Using a simple model of the expansion history, the transition between the two epochs is constrained to be at z=0.46 +/- 0.13. The data are consistent with the cosmic concordance model of Omega_M ~ 0.3, Omega_Lambda~0.7 (chi^2_dof=1.06), and are inconsistent with a simple model of evolution or dust as an alternative to dark energy. For a flat Universe with a cosmological constant. When combined with external flat-Universe constraints we find w=-1.02 + 0.13 - 0.19 (and $<-0.76 at the 95% confidence level) for an assumed static equation of state of dark energy, P = w\rho c^2. Joint constraints on both the recent equation of state of dark energy, $w_0$, and its time evolution, dw/dz, are a factor of ~8 more precise than its first estimate and twice as precise as those without the SNe Ia discovered with HST. Our constraints are consistent with the static nature of and value of w expected for a cosmological constant (i.e., w_0 = -1.0, dw/dz = 0), and are inconsistent with very rapid evolution of dark energy. We address consequences of evolving dark energy for the fate of the Universe. }, added-at = {2010-03-09T16:13:25.000+0100}, author = {{Riess}, Adam G. and {Strolger}, Louis-Gregory and {Tonry}, John and Casertano, Stefano and Ferguson, Henry C. and Mobasher, Bahram and Challis, Peter and Filippenko, Alexei V. and Jha, Saurabh and Li, Weidong and Chornock, Ryan and Kirshner, Robert P. and Leibundgut, Bruno and Dickinson, Mark and Livio, Mario and Giavalisco, Mauro and Steidel, Charles C. and Benitez, Narciso and Tsvetanov, Zlatan}, biburl = {https://www.bibsonomy.org/bibtex/2679ba7fcd61211f9b5ae52a8511597c5/ad4}, description = {[astro-ph/0402512] Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution}, interhash = {c4781f162ace534c082bddef6eccd389}, intrahash = {679ba7fcd61211f9b5ae52a8511597c5}, keywords = {Distance Luminosity Redshift Supernovae Survey}, note = {cite arxiv:astro-ph/0402512 Comment: Accepted Astrophysical Journal, to Appear June 2004 72 pages, 17 Figures}, timestamp = {2010-03-09T16:13:25.000+0100}, title = {{T}ype {I}a {S}upernova {D}iscoveries at z>1 {F}rom the {H}ubble {S}pace {T}elescope: {E}vidence for {P}ast {D}eceleration and {C}onstraints on {D}ark {E}nergy {E}volution}, url = {http://arxiv.org/abs/astro-ph/0402512}, year = 2004 }