We perform a tomographic cross-correlation analysis of archival FIRAS data and the BOSS galaxy redshift survey to constrain the amplitude of [C II] 2P3/2 → 2P1/2 fine structure emission. Our analysis employs spherical harmonic tomography (SHT), which is based on the angular cross-power spectrum between FIRAS maps and BOSS galaxy over-densities at each pair of redshift bins, over a redshift range of 0.24 < z < 0.69. We develop the SHT approach for intensity mapping, where it has several advantages over existing power spectral estimators. Our analysis constrains the product of the [C II] bias and [C II] specific intensity, $$b_{\rm [C \small{\rm II}]}I_{\rm [C \small{\rm II}]}$$, to be <0.31 MJy/sr at z ≈ 0.35 and <0.28 MJy/sr at z ≈ 0.57 at $$95{{\ \rm per\ cent}}$$ confidence. These limits are consistent with most current models of the [C II] signal, as well as with higher-redshift [C II] cross-power spectrum measurements from the Planck satellite and BOSS quasars. We also show that our analysis, if applied to data from a more sensitive instrument such as the proposed PIXIE satellite, can detect pessimistic [C II] models at high significance.
Anderson, C. J., et al. "Constraining low redshift [C <scp> II</scp> ] emission by cross-correlating FIRAS and BOSS data." Monthly Notices of the Royal Astronomical Society, vol. 514, no. 1, May. 2022. https://doi.org/10.1093/mnras/stac1301
Anderson, C. J., Switzer, E. R., & Breysse, P. C. (2022). Constraining low redshift [C <scp> II</scp> ] emission by cross-correlating FIRAS and BOSS data. Monthly Notices of the Royal Astronomical Society, 514(1). https://doi.org/10.1093/mnras/stac1301
Anderson, C. J., Switzer, E. R., and Breysse, P. C., "Constraining low redshift [C <scp> II</scp> ] emission by cross-correlating FIRAS and BOSS data," Monthly Notices of the Royal Astronomical Society 514, no. 1 (2022), https://doi.org/10.1093/mnras/stac1301
@article{osti_1871745,
author = {Anderson, C. J. and Switzer, E. R. and Breysse, P. C.},
title = {Constraining low redshift [C <scp> II</scp> ] emission by cross-correlating FIRAS and BOSS data},
annote = {ABSTRACT We perform a tomographic cross-correlation analysis of archival FIRAS data and the BOSS galaxy redshift survey to constrain the amplitude of [C II] 2P3/2 → 2P1/2 fine structure emission. Our analysis employs spherical harmonic tomography (SHT), which is based on the angular cross-power spectrum between FIRAS maps and BOSS galaxy over-densities at each pair of redshift bins, over a redshift range of 0.24 < z < 0.69. We develop the SHT approach for intensity mapping, where it has several advantages over existing power spectral estimators. Our analysis constrains the product of the [C II] bias and [C II] specific intensity, $b_{\rm [C \small{\rm II}]}I_{\rm [C \small{\rm II}]}$, to be <0.31 MJy/sr at z ≈ 0.35 and <0.28 MJy/sr at z ≈ 0.57 at $95{{\ \rm per\ cent}}$ confidence. These limits are consistent with most current models of the [C II] signal, as well as with higher-redshift [C II] cross-power spectrum measurements from the Planck satellite and BOSS quasars. We also show that our analysis, if applied to data from a more sensitive instrument such as the proposed PIXIE satellite, can detect pessimistic [C II] models at high significance.},
doi = {10.1093/mnras/stac1301},
url = {https://www.osti.gov/biblio/1871745},
journal = {Monthly Notices of the Royal Astronomical Society},
issn = {ISSN 0035-8711},
number = {1},
volume = {514},
place = {United Kingdom},
publisher = {Oxford University Press},
year = {2022},
month = {05}}
US Department of Energy (USDOE), Washington, DC (United States). Office of Science, Sloan Digital Sky Survey (SDSS)
Sponsoring Organization:
Alfred P. Sloan Foundation; USDOE; USDOE Office of Science (SC)
OSTI ID:
1871745
Alternate ID(s):
OSTI ID: 1982602
Journal Information:
Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 1 Vol. 514; ISSN 0035-8711