Multiwavelength dissection of a massive heavily dust-obscured galaxy and its blue companion at <i>z</i>∼2

In this work we study a system of two galaxies, Astarte and Adonis, at z $\sim $2 when the Universe was undergoing its peak star formation activity. is dusty star-forming galaxy massive-end main sequence (MS) Adonis less-massive, bright in ultraviolet (UV), companion with an optical spectroscopic redshift. We analyse physical properties system, probe gas mass ALMA CO emission, to investigate whether ultra-massive quenching or not. use CIGALE - spectral energy distribution modeling code derive key mainly their rates (SFRs), stellar masses, dust luminosities. inspect variation parameters depending on assumed attenuation law. also estimate molecular from using different $\alpha_{CO}$ transition ratios ($r_{31}$) discuss implication various assumptions derivation. find that exhibits MS-like activity, while strong starburst (SB) phase. The far below fraction typical galaxies z=2. This low content high SFR, result depletion time $0.22\pm0.07$ Gyrs, slightly shorter than what expected for MS luminosity versus total IR suggests activity assuming galactic conversion factor ratio. SFR same order laws, unlike increases shallow laws. these suggest might be experiencing recent decrease through following SB epoch.