TY - JOUR
T1 - Detection likelihood of cluster-induced CMB polarization
AU - Mirmelstein, M.
AU - Shimon, M.
AU - Rephaeli, Y.
N1 - Publisher Copyright:
© 2020 ESO.
PY - 2020/12/1
Y1 - 2020/12/1
N2 - Nearby galaxy clusters can potentially induce sub-microkelvin polarization signals in the cosmic microwave background (CMB) at characteristic scales of a few arcminutes. We explore four such polarization signals induced in a rich nearby fiducial cluster and calculate the likelihood of their detection by a telescope project with capabilities such as those of the Simons Observatory (SO). In our feasibility analysis, we include instrumental noise, primordial CMB anisotropy, statistical thermal Sunyaev-Zeldovich (SZ) cluster signal, and point source confusion, assuming a few percent of the nominal telescope observation time of an SO-like project. Our analysis indicates that the thermal SZ intensity can be sensitively mapped in rich nearby clusters and that the kinematic SZ intensity can be measured with high statistical significance toward a fast moving nearby cluster. The detection of polarized SZ signals will be quite challenging but could still be feasible toward several very rich nearby clusters with very high SZ intensity. The polarized SZ signal from a sample of ∼20 clusters can be statistically detected at S/N ∼ 3, if observed for several months.
AB - Nearby galaxy clusters can potentially induce sub-microkelvin polarization signals in the cosmic microwave background (CMB) at characteristic scales of a few arcminutes. We explore four such polarization signals induced in a rich nearby fiducial cluster and calculate the likelihood of their detection by a telescope project with capabilities such as those of the Simons Observatory (SO). In our feasibility analysis, we include instrumental noise, primordial CMB anisotropy, statistical thermal Sunyaev-Zeldovich (SZ) cluster signal, and point source confusion, assuming a few percent of the nominal telescope observation time of an SO-like project. Our analysis indicates that the thermal SZ intensity can be sensitively mapped in rich nearby clusters and that the kinematic SZ intensity can be measured with high statistical significance toward a fast moving nearby cluster. The detection of polarized SZ signals will be quite challenging but could still be feasible toward several very rich nearby clusters with very high SZ intensity. The polarized SZ signal from a sample of ∼20 clusters can be statistically detected at S/N ∼ 3, if observed for several months.
KW - Cosmic background radiation
KW - Galaxies: clusters: general
KW - Polarization
UR - http://www.scopus.com/inward/record.url?scp=85097256290&partnerID=8YFLogxK
U2 - 10.1051/0004-6361/201834657
DO - 10.1051/0004-6361/201834657
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:85097256290
SN - 0004-6361
VL - 644
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - A36
ER -