23 High Redshift Supernovae from the IfA Deep Survey: Doubling the SN Sample at z>0.7

By B. Barris, J. Tonry, S. Blondin, P. Challis, Ryan Chornock, A. Clocchiatti, A. Filippenko, P. Garnavich, S. Holland, S. Jha and 22 more. 2003

303 citations recorded by the source corpus.

We present photometric and spectroscopic observations of 23 high redshift supernovae spanning a range of z=0.34-1.03, 9 of which are unambiguously classified as Type Ia. These supernovae were discovered during the IfA Deep Survey, which began in September 2001 and observed a total of 2.5 square degrees to a depth of approximately m=25-26 in RIZ over 9-17 visits, typically every 1-3 weeks for nearly 5 months, with additional observations continuing until April 2002. We give a brief description of the survey motivations, observational strategy, and reduction process. This sample of 23 high-redshift supernovae includes 15 at z>0.7, doubling the published number of objects at these redshifts, and indicates that the evidence for acceleration of the universe is not due to a systematic effect proportional to redshift. In combination with the recent compilation of Tonry et al. (2003), we calculate cosmological parameter density contours which are consistent with the flat universe indicated by the CMB (Spergel et al. 2003). Adopting the constraint that Omega_total = 1.0, we obtain best-fit values of (Omega_m, Omega_Lambda)=(0.33, 0.67) using 22 SNe from this survey augmented by the literature compilation. We show that using the empty-beam model for gravitational lensing does not eliminate the need for Omega_Lambda > 0. Experience from this survey indicates great potential for similar large-scale surveys while also revealing the limitations of performing surveys for z>1 SNe from the ground.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/f3bffe215a951bf0e51c8848fe5d3e1e1c0138b3

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. A. Starobinsky
2. Xin Zhang
3. V. Sahni
4. N. Smith
5. A. Filippenko
6. J. Silverman
7. Ujjaini Alam
8. Weidong Li

In Nuclear and High Energy Physics

1. Xin Zhang
2. A. Starobinsky
3. Fengquan Wu
4. V. Sahni
5. Ujjaini Alam
6. J. Silverman
7. M. Ganeshalingam
8. Weidong Li

Citations in the corpus

• Categorizing Different Approaches to the Cosmological Constant Problem (2004, background): “Actually, after the remarkable discoveries and subsequent confirmations starting in 1997 (SN)[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11] (WMAP) [12, 13] (Boomerang) [14, 15] (SdSS) [16, 17] (Hubble) [18] that the universe really is accelerating its expansion, there appear to be at present at least three cos”
• Constraints on holographic dark energy from the latest supernovae, galaxy clustering, and cosmic microwave background anisotropy observations (2007, background): “Note that marginalizing over H0 is equivalent to evaluating χ 2 at its minimum with respect to H0 [85].”
• Is there supernova evidence for dark energy metamorphosis (2003, methodology): “As this paper was nearing completion, a new data set consisting of 23 Type Ia SNe was released by the HZT team (Barris et al. 2003).”