| dc.creator | David Hughes | |
| dc.date | 2011-04-20 | |
| dc.date.accessioned | 2023-07-25T16:24:28Z | |
| dc.date.available | 2023-07-25T16:24:28Z | |
| dc.identifier | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1860 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7807051 | |
| dc.description | We report on extragalactic sources detected in a 455 deg² map of the southern sky made with data at a frequency of 148 GHz from the Atacama Cosmology Telescope (ACT) 2008 observing season. We provide a catalog of 157 sources with flux densities spanning two orders of magnitude: from 15 mJy to 1500 mJy. Comparison to other catalogs shows that 98% of the ACT detections correspond to sources detected at lower radio frequencies. Three of the sources appear to be associated with the brightest cluster galaxies of low-redshift X-ray-selected galaxy clusters. Estimates of the radio to millimeter-wave spectral indices and differential counts of the sources further bolster the hypothesis that they are nearly all radio sources, and that their emission is not dominated by re-emission from warm dust. In a bright (>50 mJy) 148 GHz selected sample with complete cross-identifications from the Australia Telescope 20 GHz survey, we observe an average steepening of the spectra between 5, 20, and 148 GHz with median spectral indices of α₅₋₂₀ = −0.07 ± 0.06, α₂₀₋₁₄₈ = −0.39 ± 0.04, and α₅₋₁₄₈ = −0.20±0.03. When the measured spectral indices are taken into account, the 148 GHz differential source counts are consistent with previous measurements at 30 GHz in the context of a source count model dominated by radio sources. Extrapolating with an appropriately rescaled model for the radio source counts, the Poisson contribution to the spatial power spectrum from synchrotron-dominated sources with flux density less than 20 mJy is CSync= (2.8 ± 0.3) × 10⁻⁶μK². | |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | The Astrophysical Journal | |
| dc.relation | citation:Marriage, Tobias A., et al., (2011), THE ATACAMA COSMOLOGY TELESCOPE: EXTRAGALACTIC SOURCES AT 148 GHz IN THE 2008 SURVEY, The Astrophysical Journal, Vol. 731(2):1-15 | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/4.0 | |
| dc.subject | info:eu-repo/classification/Inspec/Cosmic background radiation | |
| dc.subject | info:eu-repo/classification/Inspec/Galaxies: active | |
| dc.subject | info:eu-repo/classification/Inspec/Radio continuum: galaxies | |
| dc.subject | info:eu-repo/classification/Inspec/surveys | |
| dc.subject | info:eu-repo/classification/cti/1 | |
| dc.subject | info:eu-repo/classification/cti/21 | |
| dc.subject | info:eu-repo/classification/cti/21 | |
| dc.title | THE ATACAMA COSMOLOGY TELESCOPE: EXTRAGALACTIC SOURCES AT 148 GHz IN THE 2008 SURVEY | |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/acceptedVersion | |
| dc.audience | students | |
| dc.audience | researchers | |
| dc.audience | generalPublic | |
