Omori, Y.; Chown, R.; Simard, G.; Story, K. T.; Aylor, K.; Baxter, E. J.; Benson, B. A.; Bleem, L. E.; Carlstrom, J. E.; Chang, C. L.; Cho, H.-M.; Crawford, T. M.; Crites, A. T.; Haan, T. de; Dobbs, M. A.; Everett, W. B.; George, E. M.; Halverson, N. W.; Harrington, N. L.; Holder, G. P.; Hou, Z.; Holzapfel, W. L.; Hrubes, J. D.; Knox, L.; Lee, A. T.; Leitch, E. M.; Luong-Van, D.; Manzotti, A.; Marrone, D. P.; McMahon, J. J.; Meyer, S. S.; Moeanu, L. M.; Mohr, J. J.; Natoli, T.; Padin, S.; Pryke, C.; Reichardt, C. L.; Ruhl, J. E.; Sayre, J. T.; Schaffer, K. K.; Shirokoff, E.; Staniszewski, Z.; Stark, A. A.; Vanderlinde, K.; Vieira, J. D.; Williamson, R.; Zahn, O. (2017): A 2500 deg(2) CMB Lensing Map from Combined South Pole Telescope and Planck Data. In: Astrophysical Journal, Vol. 849, No. 2, 124 |
Abstract
We present a cosmic microwave background (CMB) lensing map produced from a linear combination of South Pole Telescope (SPT) and Planck temperature data. The 150 GHz temperature data from the 2500 deg(2) SPT-SZ survey is combined with the Planck 143 GHz data in harmonic space to obtain a temperature map that has a broader l coverage and less noise than either individual map. Using a quadratic estimator technique on this combined temperature map, we produce a map of the gravitational lensing potential projected along the line of sight. We measure the auto-spectrum of the lensing potential C-L(phi phi), and compare it to the theoretical prediction for a.CDM cosmology consistent with the Planck 2015 data set, finding a best-fit amplitude of 0.95(-0.06)(+0.06) (stat.)(-0.01)(+0.01)+ (sys.). The null hypothesis of no lensing is rejected at a significance of 24 sigma. One important use of such a lensing potential map is in cross-correlations with other dark matter tracers. We demonstrate this cross-correlation in practice by calculating the cross-spectrum, C-L(phi) G, between the SPT+ Planck lensing map and Wide-field Infrared Survey Explorer (WISE) galaxies. We fit C-L(phi G) to a power law of the form p(L) = a(L/L-0)(-b) with a, L-0, and b fixed, and find eta(phi G) = C-L(phi G)/p(L) = 0.94(-0.04)(+0.04), which is marginally lower, but in good agreement with eta(phi G) = 1.00-(+0.02)(0.01), the best-fit amplitude for the cross-correlation of Planck-2015 CMB lensing and WISE galaxies over similar to 67% of the sky. The lensing potential map presented here will be used for cross-correlation studies with the Dark Energy Survey, whose footprint nearly completely covers the SPT 2500 deg(2) field.
Item Type: | Journal article |
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Faculties: | Physics |
Subjects: | 500 Science > 530 Physics |
ISSN: | 0004-637X |
Language: | English |
ID Code: | 53914 |
Deposited On: | 14. Jun 2018 09:54 |
Last Modified: | 04. Nov 2020 13:33 |
- BASE
- Omori, Y.
- Chown, R.
- Simard, G.
- Story, K. T.
- Aylor, K.
- Baxter, E. J.
- Benson, B. A.
- Bleem, L. E.
- Carlstrom, J. E.
- Chang, C. L.
- Cho, H.-M.
- Crawford, T. M.
- Crites, A. T.
- Haan, T. de
- Dobbs, M. A.
- Everett, W. B.
- George, E. M.
- Halverson, N. W.
- Harrington, N. L.
- Holder, G. P.
- Hou, Z.
- Holzapfel, W. L.
- Hrubes, J. D.
- Knox, L.
- Lee, A. T.
- Leitch, E. M.
- Luong-Van, D.
- Manzotti, A.
- Marrone, D. P.
- McMahon, J. J.
- Meyer, S. S.
- Moeanu, L. M.
- Mohr, J. J.
- Natoli, T.
- Padin, S.
- Pryke, C.
- Reichardt, C. L.
- Ruhl, J. E.
- Sayre, J. T.
- Schaffer, K. K.
- Shirokoff, E.
- Staniszewski, Z.
- Stark, A. A.
- Vanderlinde, K.
- Vieira, J. D.
- Williamson, R.
- Zahn, O.
- Google Scholar
- Omori, Y.
- Chown, R.
- Simard, G.
- Story, K. T.
- Aylor, K.
- Baxter, E. J.
- Benson, B. A.
- Bleem, L. E.
- Carlstrom, J. E.
- Chang, C. L.
- Cho, H.-M.
- Crawford, T. M.
- Crites, A. T.
- Haan, T. de
- Dobbs, M. A.
- Everett, W. B.
- George, E. M.
- Halverson, N. W.
- Harrington, N. L.
- Holder, G. P.
- Hou, Z.
- Holzapfel, W. L.
- Hrubes, J. D.
- Knox, L.
- Lee, A. T.
- Leitch, E. M.
- Luong-Van, D.
- Manzotti, A.
- Marrone, D. P.
- McMahon, J. J.
- Meyer, S. S.
- Moeanu, L. M.
- Mohr, J. J.
- Natoli, T.
- Padin, S.
- Pryke, C.
- Reichardt, C. L.
- Ruhl, J. E.
- Sayre, J. T.
- Schaffer, K. K.
- Shirokoff, E.
- Staniszewski, Z.
- Stark, A. A.
- Vanderlinde, K.
- Vieira, J. D.
- Williamson, R.
- Zahn, O.