The Lockman–SpReSO project. Main properties of infrared selected star-forming galaxies

The Lockman–SpReSO project. Main properties of infrared selected star-forming galaxies
Mauro Gonz’alez-Otero, Jordi Cepa, Carmen P. Padilla-Torres, Maritza A. Lara-L’opez, J. Jes’us Gonz’alez, ‘Angel Bongiovanni, Bernab’e Cedr’es, Miguel Cervi~no, Irene Cruz-Gonz’alez, Mauricio El’ias-Ch’avez, Mart’in Herrera-Edoqui, H’ector J. Ibarra-Medel, Yair Krongold, Jakub Nadolny, C. Alenka Negrete, Ana Mar’ia P’erez Garc’ia, Jos’e A. De Diego, J. Ignacio Gonz’alez-Serrano, H’ector Hern’andez-Toledo, Ricardo P’erez-Mart’inez, Miguel S’anchez-Portal
arXiv:2404.13629v1 Announce Type: new
Abstract: Methods.We applied distinct selection criteria to attain an SFG sample with minimal AGN contamination. Multiple approaches were used to estimate the intrinsic extinction, SFR and gas-phase metallicity for the SFGs. In conjunction with findings in the literature, we examined the correlation between SFRs and stellar masses ($M_*$), as well as the metallicity evolution depending on $M_*$. Finally, the 3D relationship between $M_*$, SFR and metallicity, is also studied.} Results. From the initial spectroscopic sample of 409 FIR-selected objects from the Lockman–SpReSO catalogue, 69 (17%) AGNs have been identified and excluded, which is nearly double the percentage found in local studies, leaving a sample of 340 SFGs. The analysis of the $M_*$–SFR relationship revealed that Lockman–SpReSO IR-selected SFGs show signs of evolution at redshifts $z>0.4$, shifting above the main sequence, with a mean value of $sim0.4$ dex. They are located within the starburst galaxy region since 78% of the galaxies fall into this category. In addition, no evident flattening was found in the relation to specific SFR with redshift for $log M_* (M_odot) gtrsim 10.5$. In line with the $M_*$–metallicity relation (MZR) outcomes published in previous studies for optically selected SFGs, however, during the analysis of the MZR, it was found that IR-selected SFGs exhibit lower metallicities than those anticipated on the basis of their $M_*$ and redshift. During the investigation of the 3D $M_*$–SFR–metallicity relation (FP), it was established that the research sample is consistent with relations in the existing literature, with an average scatter of $sim0.2$ dex. However, a re-calibration of the FP when using the SFR obtained from the IR luminosity is required and, in this case, no attenuation in the correlation for $log M_* (M_odot) gtrsim 10.5$ is observed.arXiv:2404.13629v1 Announce Type: new
Abstract: Methods.We applied distinct selection criteria to attain an SFG sample with minimal AGN contamination. Multiple approaches were used to estimate the intrinsic extinction, SFR and gas-phase metallicity for the SFGs. In conjunction with findings in the literature, we examined the correlation between SFRs and stellar masses ($M_*$), as well as the metallicity evolution depending on $M_*$. Finally, the 3D relationship between $M_*$, SFR and metallicity, is also studied.} Results. From the initial spectroscopic sample of 409 FIR-selected objects from the Lockman–SpReSO catalogue, 69 (17%) AGNs have been identified and excluded, which is nearly double the percentage found in local studies, leaving a sample of 340 SFGs. The analysis of the $M_*$–SFR relationship revealed that Lockman–SpReSO IR-selected SFGs show signs of evolution at redshifts $z>0.4$, shifting above the main sequence, with a mean value of $sim0.4$ dex. They are located within the starburst galaxy region since 78% of the galaxies fall into this category. In addition, no evident flattening was found in the relation to specific SFR with redshift for $log M_* (M_odot) gtrsim 10.5$. In line with the $M_*$–metallicity relation (MZR) outcomes published in previous studies for optically selected SFGs, however, during the analysis of the MZR, it was found that IR-selected SFGs exhibit lower metallicities than those anticipated on the basis of their $M_*$ and redshift. During the investigation of the 3D $M_*$–SFR–metallicity relation (FP), it was established that the research sample is consistent with relations in the existing literature, with an average scatter of $sim0.2$ dex. However, a re-calibration of the FP when using the SFR obtained from the IR luminosity is required and, in this case, no attenuation in the correlation for $log M_* (M_odot) gtrsim 10.5$ is observed.