Matches in SemOpenAlex for { <https://semopenalex.org/work/W3177288889> ?p ?o ?g. }
- W3177288889 endingPage "3655" @default.
- W3177288889 startingPage "3644" @default.
- W3177288889 abstract "Recent high-resolution interferometric images of submillimetre galaxies (SMGs) reveal fascinatingly complex morphologies. This raises a number of questions: how does the relative orientation of a galaxy affect its observed submillimetre emission, and does this result in an `orientation bias' in the selection and analysis of such galaxies in flux-limited cosmological surveys? We investigated these questions using the textsc{Simba} cosmological simulation paired with the dust radiative transfer code textsc{Powderday}. We selected eight simulated SMGs ($S_{850}gtrsim2$ mJy) at $z = 2$, and measured the variance of their `observed' emission over 50 random orientations. Each galaxy exhibits significant scatter in its emission close to the peak of the thermal dust emission, with variation in flux density of up to a factor of 2.7. This results in an appreciable dispersion in the inferred dust temperatures and infrared luminosities ($16^{mathrm{th}}-84^{mathrm{th}}$ percentile ranges of 5,K and 0.1,dex, respectively) and therefore a fundamental uncertainty in derived parameters such as dust mass and star formation rate ($sim$30% for the latter using simple calibrations). Using a Monte Carlo simulation we also assessed the impact of orientation on flux-limited surveys, finding a bias in the selection of SMGs towards those with face--on orientations, as well as those at lower redshifts. We predict that the orientation bias will affect flux-limited single-dish surveys, most significantly at THz frequencies, and this bias should be taken into account when placing the results of targeted follow--up studies in a statistical context." @default.
- W3177288889 created "2021-07-05" @default.
- W3177288889 creator A5005678872 @default.
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- W3177288889 creator A5057320280 @default.
- W3177288889 creator A5065760471 @default.
- W3177288889 creator A5070040151 @default.
- W3177288889 date "2022-07-28" @default.
- W3177288889 modified "2023-10-17" @default.
- W3177288889 title "An orientation bias in observations of submillimetre galaxies" @default.
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