Galaxy Main Sequence at z∼1

Mateusz Rałowski, Katarzyna Małek, Agnieszka Pollo

The influence of dust attenuation models on the relationship between star formation rate (SFR) and stellar mass (M^∗) (so called "galaxy main sequence", MS) for star-forming galaxies was analyzed based on the sample of ∼ 24 000 galaxies from the VIMOS Public Extragalactic Redshift Survey (VIPERS), selected based on the NUVrK_s color-color diagram. For this sample of galaxies, physical parameters based on the Spectral Energy Distribution (SED) fitting were derived. The procedure was repeated for two different attenuation models: Charlot & Fall (2000) (CF00) and Calzetti et al. (2000). The significant difference between estimated values of M^∗ for different attenuation models was found, with the Charlot & Fall (2000) attenuation model providing, in general, higher values of stellar mass (M^∗) and larger scatter for obtained SFR as compared to the Calzetti et al. (2000) attenuation model. The MS obtained with these two attenuation models was also found to differ, with the MS_CF00 having a higher slope (0.7) than MS_Calzetti (0.3).

Proceedings of the Polish Astronomical Society, vol. 10, 231-236 (2020)

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