Joint measurement of lensing–galaxy correlations using SPT and DES SV data

• Published in: Monthly Notices of the Royal Astronomical Society
• Main Authors: Baxter, E., Clampitt, J., Giannantonio, T., Dodelson, S., Jain, B., Huterer, D., Bleem, L., Crawford, T., Efstathiou, G., Fosalba, P., Kirk, D., Kwan, J., Sánchez, C., Story, K., Troxel, M. A., Abbott, T. M. C., Abdalla, F. B., Armstrong, R., Benoit-Lévy, A., Benson, B., Bernstein, G. M., Bernstein, R. A., Bertin, E., Brooks, D., Carlstrom, J., Rosell, A. Carnero, Carrasco Kind, M., Carretero, J., Chown, R., Crocce, M., Cunha, C. E., da Costa, L. N., Desai, S., Diehl, H. T., Dietrich, J. P., Doel, P., Evrard, A. E., Fausti Neto, A., Flaugher, B., Frieman, J., Gruen, D., Gruendl, R. A., Gutierrez, G., de Haan, T., Holder, G., Honscheid, K., Hou, Z., James, D. J., Kuehn, K., Kuropatkin, N., Lima, M., March, M., Marshall, J. L., Martini, P., Melchior, P., Miller, C. J., Miquel, R., Mohr, J. J., Nord, B., Omori, Y., Plazas, A. A., Reichardt, C., Romer, A. K., Rykoff, E. S., Sanchez, E., Sevilla-Noarbe, I., Sheldon, E., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Stark, A., Swanson, M. E. C., Tarle, G., Thomas, D., Walker, A. R., Wechsler, R. H.
• Language: unknown
• Published: 2023
• Subjects: 79 ASTRONOMY AND ASTROPHYSICS; South Pole; South pole
• Online Access: http://www.osti.gov/servlets/purl/1336111; https://www.osti.gov/biblio/1336111; https://doi.org/10.1093/mnras/stw1584

Here, we measure the correlation of galaxy lensing and cosmic microwave background lensing with a set of galaxies expected to trace the matter density field. We also took measurements using pre-survey Dark Energy Survey (DES) Science Verification optical imaging data and millimetre-wave data from the 2500 sq. deg. South Pole Telescope Sunyaev–Zel'dovich (SPT-SZ) survey. The two lensing–galaxy correlations are jointly fit to extract constraints on cosmological parameters, constraints on the redshift distribution of the lens galaxies, and constraints on the absolute shear calibration of DES galaxy-lensing measurements. We show that an attractive feature of these fits is that they are fairly insensitive to the clustering bias of the galaxies used as matter tracers. The measurement presented in our work confirms that DES and SPT data are consistent with each other and with the currently favoured Λ cold dark matter cosmological model. It also demonstrates that joint lensing–galaxy correlation measurement considered here contains a wealth of information that can be extracted using current and future surveys.