Probing star formation and ISM properties using galaxy disk inclination II: Testing typical FUV attenuation corrections out to z$\sim$0.7

TL;DR

This study compares different dust attenuation correction methods for FUV-based star formation rates in galaxies at z~0 and z~0.7, finding that MIR+FUV and radiative transfer methods perform best in removing inclination biases.

Contribution

It evaluates and compares the effectiveness of UV colour, MIR+FUV, and radiative transfer correction methods for FUV SFRs at different redshifts, highlighting the superior performance of MIR+FUV and radiative transfer approaches.

Findings

MIR+FUV luminosities yield the most inclination-independent SFRs.

Radiative transfer corrections align well with expected SFRs at both redshifts.

UV-slope based corrections are less effective, especially at z~0.7.

Abstract

We evaluate dust-corrected far ultraviolet (FUV) star formation rates (SFRs) for samples of star-forming galaxies at $z\sim0$ and $z\sim0.7$ and find significant differences between values obtained through corrections based on UV colour, from a hybrid mid-infrared (MIR) plus FUV relation, and from a radiative transfer based attenuation correction method. The performances of the attenuation correction methods are assessed by their ability to remove the dependency of the corrected SFR on inclination, as well as returning, on average, the expected population mean SFR. We find that combining MIR (rest-frame $\sim$13$\mu$m) and FUV luminosities gives the most inclination independent SFRs and reduces the intrinsic SFR scatter out of the methods tested. However, applying the radiative transfer based method of Tuffs et al. gives corrections to the FUV SFR that are inclination independent and in agreement with the expected SFRs at both $z\sim0$ and $z\sim0.7$. SFR corrections based on the UV-slope perform worse than the other two methods tested. For our local sample, the UV-slope method works on average but does not remove inclination biases. At $z\sim$0.7 we find that the UV-slope correction used locally flattens the inclination dependence compared to the raw FUV measurements but was not sufficient to correct for the large attenuation observed at $z\sim$0.7.