Cross - correlation of the Cosmic Microwave Background with the 2MASS galaxy survey: Signatures of dark energy, hot gas, and point sources

By N. Afshordi, Y. Loh, M. Strauss. 2003

186 citations recorded by the source corpus.

We cross-correlate the Cosmic Microwave Background (CMB) temperature anisotropies observed by the Wilkinson Microwave Anisotropy Probe (WMAP) with the projected distribution of extended sources in the Two Micron All Sky Survey (2MASS). By modelling the theoretical expectation for this signal, we extract the signatures of dark energy (Integrated Sachs-Wolfe effect;ISW), hot gas (thermal Sunyaev-Zeldovich effect;thermal SZ), and microwave point sources in the cross-correlation. Our strongest signal is the thermal SZ, at the 3.1-3.7 \sigma level, which is consistent with the theoretical prediction based on observations of X-ray clusters. We also see the ISW signal at the 2.5 \sigma level, which is consistent with the expected value for the concordance LCDM cosmology, and is an independent signature of the presence of dark energy in the universe. Finally, we see the signature of microwave point sources at the 2.7 \sigma level.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/bbe3659153a18e1b1c0f3617ceb221f63a05681a

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. Riess
2. A. Filippenko
3. R. Kirshner
4. S. Jha
5. Weidong Li
6. P. Hopkins
7. Daniel J. Eisenstein
8. L. Hernquist

In Nuclear and High Energy Physics

1. A. Filippenko
2. B. Leibundgut
3. Weidong Li
4. S. Jha
5. R. Kirshner
6. D. Weinberg
7. J. Tonry
8. Thomas Matheson

Citations in the corpus

• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z ≥ 1: Narrowing Constraints on the Early Behavior of Dark Energy (2006, methodology): “Measurements of the integrated Sachs-Wolfe effect (e.g., Afshordi et al. 2004; Boughn & Crittenden 2004; Fosalba et al. 2003; Nolta et al. 2004; Scranton et al. 2005)more directly suggest the presence of dark energywith a negative pressure.”
• An Imprint of Superstructures on the Microwave Background due to the Integrated Sachs-Wolfe Effect (2008, background): “Measurements from individual galaxy surveys detect the effect with signal-to-noise no higher than 3 (Scranton et al. 2003; Boughn & Crittenden 2004; Afshordi et al. 2004; Padmanabhan et al. 2005; Raccanelli et al. 2008).”
• Hubble Space Telescope and Ground-based Observations of Type Ia Supernovae at Redshift 0.5: Cosmological Implications (2005, background): “First, Afshordi et al. (2004), Boughn & Crittenden (2004), Fosalba et al. (2003), Nolta et al. (2004), and Scranton et al. (2005) study the Integrated SachsWolfe (ISW) effect based on the cross-correlation between the SloanDigital Sky Survey sample of galaxies and the temperature of the…”
• Observational probes of cosmic acceleration (2012, background): “…distributions, led to renewed interest in ISW and to the first marginal-significance detections (Fosalba et al., 2003; Scranton et al., 2003; Afshordi et al., 2004; Boughn and Crittenden, 2004; Fosalba and Gaztañaga, 2004; Nolta et al., 2004) Realizing the cosmological potential of the ISW…”
• 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”