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Title: On Estimation of Contamination from Hydrogen Cyanide in Carbon Monoxide Line-intensity Mapping

Here, line-intensity mapping surveys probe large-scale structure through spatial variations in molecular line emission from a population of unresolved cosmological sources. Future such surveys of carbon monoxide line emission, specifically the CO(1-0) line, face potential contamination from a disjointed population of sources emitting in a hydrogen cyanide emission line, HCN(1-0). This paper explores the potential range of the strength of HCN emission and its effect on the CO auto power spectrum, using simulations with an empirical model of the CO/HCN–halo connection. We find that effects on the observed CO power spectrum depend on modeling assumptions but are very small for our fiducial model, which is based on current understanding of the galaxy–halo connection. Given the fiducial model, we expect the bias in overall CO detection significance due to HCN to be less than 1%.
Authors:
ORCiD logo [1] ; ORCiD logo [1] ;  [1] ;  [1] ; ORCiD logo [2]
  1. Stanford Univ., Stanford, CA (United States)
  2. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 846; Journal Issue: 1; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; galaxies: high-redshift; galaxies: statistics; radio lines: galaxies
OSTI Identifier:
1394079

Chung, Dongwoo T., Li, Tony Y., Viero, Marco P., Church, Sarah E., and Wechsler, Risa H.. On Estimation of Contamination from Hydrogen Cyanide in Carbon Monoxide Line-intensity Mapping. United States: N. p., Web. doi:10.3847/1538-4357/aa8624.
Chung, Dongwoo T., Li, Tony Y., Viero, Marco P., Church, Sarah E., & Wechsler, Risa H.. On Estimation of Contamination from Hydrogen Cyanide in Carbon Monoxide Line-intensity Mapping. United States. doi:10.3847/1538-4357/aa8624.
Chung, Dongwoo T., Li, Tony Y., Viero, Marco P., Church, Sarah E., and Wechsler, Risa H.. 2017. "On Estimation of Contamination from Hydrogen Cyanide in Carbon Monoxide Line-intensity Mapping". United States. doi:10.3847/1538-4357/aa8624. https://www.osti.gov/servlets/purl/1394079.
@article{osti_1394079,
title = {On Estimation of Contamination from Hydrogen Cyanide in Carbon Monoxide Line-intensity Mapping},
author = {Chung, Dongwoo T. and Li, Tony Y. and Viero, Marco P. and Church, Sarah E. and Wechsler, Risa H.},
abstractNote = {Here, line-intensity mapping surveys probe large-scale structure through spatial variations in molecular line emission from a population of unresolved cosmological sources. Future such surveys of carbon monoxide line emission, specifically the CO(1-0) line, face potential contamination from a disjointed population of sources emitting in a hydrogen cyanide emission line, HCN(1-0). This paper explores the potential range of the strength of HCN emission and its effect on the CO auto power spectrum, using simulations with an empirical model of the CO/HCN–halo connection. We find that effects on the observed CO power spectrum depend on modeling assumptions but are very small for our fiducial model, which is based on current understanding of the galaxy–halo connection. Given the fiducial model, we expect the bias in overall CO detection significance due to HCN to be less than 1%.},
doi = {10.3847/1538-4357/aa8624},
journal = {The Astrophysical Journal (Online)},
number = 1,
volume = 846,
place = {United States},
year = {2017},
month = {8}
}