The Atacama Cosmology Telescope: Modeling bulk atmospheric motion

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dc.contributor.authorMorris, Thomas W.
dc.contributor.authorBustos, Ricardo
dc.contributor.authorCalabrese, Erminia
dc.contributor.authorChoi, Steve K.
dc.contributor.authorDuivenvoorden, Adriaan J.
dc.contributor.authorDunkley, Jo
dc.contributor.authorDunner, Rolando
dc.contributor.authorGallardo, Patricio A.
dc.contributor.authorHasselfield, Matthew
dc.contributor.authorHincks, Adam D.
dc.contributor.authorMroczkowski, Tony
dc.contributor.authorNaess, Sigurd
dc.contributor.authorNiemack, Michael D.
dc.contributor.authorPage, Lyman
dc.contributor.authorPartridge, Bruce
dc.contributor.authorSalatino, Maria
dc.contributor.authorStaggs, Suzanne
dc.contributor.authorTreu, Jesse
dc.contributor.authorWollack, Edward J.
dc.contributor.authorXu, Zhilei
dc.date.accessioned2025-01-20T21:12:16Z
dc.date.available2025-01-20T21:12:16Z
dc.date.issued2022
dc.description.abstractFluctuating atmospheric emission is a dominant source of noise for ground-based millimeter-wave observations of the cosmic microwave background (CMB) temperature anisotropy at angular scales greater than or similar to 0.5 degrees. We present a model of the atmosphere as a discrete set of emissive turbulent layers that move with respect to the observer with a horizontal wind velocity. After introducing a statistic derived from the time-lag dependent correlation function for detector pairs in an array, referred to as the pair-lag, we use this model to estimate the aggregate angular motion of the atmosphere derived from time-ordered data from the Atacama Cosmology Telescope (ACT). We find that estimates derived from ACT's CMB observations alone agree with those derived from satellite weather data that additionally include a height-dependent horizontal wind velocity and water vapor density. We also explore the dependence of the measured atmospheric noise spectrum on the relative angle between the wind velocity and the telescope scan direction. In particular, we find that varying the scan velocity changes the noise spectrum in a predictable way. Computing the pair-lag statistic opens up new avenues for understanding how atmospheric fluctuations impact measurements of the CMB anisotropy.
dc.fuente.origenWOS
dc.identifier.doi10.1103/PhysRevD.105.042004
dc.identifier.eissn2470-0029
dc.identifier.issn2470-0010
dc.identifier.urihttps://doi.org/10.1103/PhysRevD.105.042004
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93652
dc.identifier.wosidWOS:000761176300006
dc.issue.numero4
dc.language.isoen
dc.revistaPhysical review d
dc.rightsacceso restringido
dc.titleThe Atacama Cosmology Telescope: Modeling bulk atmospheric motion
dc.typeartículo
dc.volumen105
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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