Integrated Sachs-Wolfe map reconstruction in the presence of systematic errors
Journal Article
·
· Physical Review. D.
- Univ. of Michigan, Ann Arbor, MI (United States); University of Michigan, Ann Arbor MI
- Univ. of Michigan, Ann Arbor, MI (United States)
The decay of gravitational potentials in the presence of dark energy leads to an additional, late-time contribution to anisotropies in the cosmic microwave background (CMB) at large angular scales. The imprint of this so-called integrated Sachs-Wolfe (ISW) effect to the CMB angular power spectrum has been detected and studied in detail, but reconstructing its spatial contributions to the CMB map, which would offer the tantalizing possibility of separating the early- from the late-time contributions to CMB temperature fluctuations, is more challenging. Here, we study the technique for reconstructing the ISW map based on information from galaxy surveys and focus in particular on how its accuracy is impacted by the presence of photometric calibration errors in input galaxy maps, which were previously found to be a dominant contaminant for ISW signal estimation. We find that both including tomographic information from a single survey and using data from multiple, complementary galaxy surveys improve the reconstruction by mitigating the impact of spurious power contributions from calibration errors. A high-fidelity reconstruction further requires one to account for the contribution of calibration errors to the observed galaxy power spectrum in the model used to construct the ISW estimator. Here, we find that if the photometric calibration errors in galaxy surveys can be independently controlled at the level required to obtain unbiased dark energy constraints, then it is possible to reconstruct ISW maps with excellent accuracy using a combination of maps from two galaxy surveys with properties similar to Euclid and SPHEREx.
- Research Organization:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Organization:
- NASA; USDOE; USDOE Office of Science (SC), High Energy Physics (HEP)
- Grant/Contract Number:
- FG02-95ER40899; SC0007859
- OSTI ID:
- 1646020
- Alternate ID(s):
- OSTI ID: 1541159
OSTI ID: 1421299
- Journal Information:
- Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 4 Vol. 97; ISSN 2470-0010; ISSN 2470-0029
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Measuring the ISW effect with next-generation radio surveys
|
journal | February 2019 |
Probing correlated compensated isocurvature perturbations using scale-dependent galaxy bias
|
journal | November 2019 |
Similar Records
Measurement of the integrated Sachs-Wolfe effect using the ALLWISE data release
Planck integrated Sachs-Wolfe-lensing likelihood and the CMB temperature
A MAP OF THE INTEGRATED SACHS-WOLFE SIGNAL FROM LUMINOUS RED GALAXIES
Journal Article
·
Sat Aug 20 00:00:00 EDT 2016
· Astrophysical Journal
·
OSTI ID:22868770
Planck integrated Sachs-Wolfe-lensing likelihood and the CMB temperature
Journal Article
·
Sun Nov 13 19:00:00 EST 2022
· Physical Review. D.
·
OSTI ID:2423053
A MAP OF THE INTEGRATED SACHS-WOLFE SIGNAL FROM LUMINOUS RED GALAXIES
Journal Article
·
Mon Aug 10 00:00:00 EDT 2009
· Astrophysical Journal
·
OSTI ID:21313671