期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 451, 期 1, 页码 849-858出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stv991
关键词
large-scale structure of Universe-radio continuum: galaxies
资金
- STFC PhD studentship
- US National Science Foundation [AST-0408698, AST-0965625, PHY-0855887, PHY-1214379]
- Princeton University
- University of Pennsylvania
- Cornell University
- Canada Foundation for Innovation (CFI)
- Comision Nacional de Investigacion Cientifica y Tecnologica de Chile (CONICYT)
- CFI under Compute Canada
- Government of Ontario
- Ontario Research Fund
- University of Toronto
- NASA [NNX13AE56G, NNX14AB58G]
- ERC [259505]
- CONICYT [QUIMAL-120001, FONDECYT-1141113]
- Misrahi research fund
- Wilkinson research fund
- Science and Technology Facilities Council [ST/K00106X/1] Funding Source: researchfish
- STFC [ST/K00106X/1] Funding Source: UKRI
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1312380, 1440226, 0965625] Funding Source: National Science Foundation
We correlate the positions of radio galaxies in the FIRST survey with the cosmic microwave background lensing convergence estimated from the Atacama Cosmology Telescope over 470 deg(2) to determine the bias of these galaxies. We remove optically cross-matched sources below redshift z = 0.2 to preferentially select active galactic nuclei (AGN). We measure the angular cross-power spectrum C-t(kg) at 4.4 sigma significance in the multipole range 100 < 1 < 3000, corresponding to physical scales within approximate to 2-60 Mpc at an effective redshift z(eff) = 1.5. Modelling the AGN population with a redshift-dependent bias, the cross-spectrum is well fitted by the Planck best-fitting A cold dark matter cosmological model. Fixing the cosmology and assumed redshift distribution of sources, we fit for the overall bias model normalization, finding b(z(eff)) = 3.5 +/- 0.8 for the full galaxy sample and b(z(eff)) = 4.0 +/- 1.1(3.0 +/- 1.1) for sources brighter (fainter) than 2.5 mJy. This measurement characterizes the typical halo mass of radio-loud AGN: we find log (M-halo/M-circle dot) = 13.6(-0.4)(+0.3).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据