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- W2980963902 abstract "ABSTRACT The ρ Oph molecular cloud is one of the best examples of spinning dust emission, first detected by the cosmic background imager (CBI). Here, we present 4.5 arcmin observations with CBI 2 that confirm 31 GHz emission from ρ Oph W, the PDR exposed to B-type star HD 147889, and highlight the absence of signal from S1, the brightest IR nebula in the complex. In order to quantify an association with dust-related emission mechanisms, we calculated correlations at different angular resolutions between the 31 GHz map and proxies for the column density of IR emitters, dust radiance, and optical depth templates. We found that the 31 GHz emission correlates best with the PAH column density tracers, while the correlation with the dust radiance improves when considering emission that is more extended (from the shorter baselines), suggesting that the angular resolution of the observations affects the correlation results. A proxy for the spinning dust emissivity reveals large variations within the complex, with a dynamic range of 25 at 3σ and a variation by a factor of at least 23, at 3σ, between the peak in ρ Oph W and the location of S1, which means that environmental factors are responsible for boosting spinning dust emissivities locally." @default.
- W2980963902 created "2019-10-25" @default.
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- W2980963902 date "2020-01-01" @default.
- W2980963902 modified "2023-10-17" @default.
- W2980963902 title "Resolved observations at 31 GHz of spinning dust emissivity variations in ρ Oph" @default.
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- W2980963902 doi "https://doi.org/10.1093/mnras/staa1422" @default.
- W2980963902 hasPublicationYear "2020" @default.
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