Understanding the Discrepancy between IRX and Balmer Decrement in Tracing Galaxy Dust Attenuation

Jianbo Qin, Xian Zhong Zheng, Stijn Wuyts +2

We compare the infrared excess (IRX) and Balmer decrement ($\mathrm{H}\alpha /H\beta$) as dust attenuation indicators in relation to other galaxy parameters using a sample of $\sim$32 000 local…