The Lockman--SpReSO project. Main properties of infrared selected star-forming galaxies
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2024
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| author | González-Otero, Mauro Cepa, Jordi Padilla-Torres, Carmen P. Lara-López, Maritza A. González, J. Jesús Bongiovanni, Ángel Cedrés, Bernabé Cerviño, Miguel Cruz-González, Irene Elías-Chávez, Mauricio Herrera-Edoqui, Martín Ibarra-Medel, Héctor J. Krongold, Yair Nadolny, Jakub Negrete, C. Alenka García, Ana María Pérez De Diego, José A. González-Serrano, J. Ignacio Hernández-Toledo, Héctor Pérez-Martínez, Ricardo Sánchez-Portal, Miguel |
| author_facet | González-Otero, Mauro Cepa, Jordi Padilla-Torres, Carmen P. Lara-López, Maritza A. González, J. Jesús Bongiovanni, Ángel Cedrés, Bernabé Cerviño, Miguel Cruz-González, Irene Elías-Chávez, Mauricio Herrera-Edoqui, Martín Ibarra-Medel, Héctor J. Krongold, Yair Nadolny, Jakub Negrete, C. Alenka García, Ana María Pérez De Diego, José A. González-Serrano, J. Ignacio Hernández-Toledo, Héctor Pérez-Martínez, Ricardo Sánchez-Portal, Miguel |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_13629 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The Lockman--SpReSO project. Main properties of infrared selected star-forming galaxies González-Otero, Mauro Cepa, Jordi Padilla-Torres, Carmen P. Lara-López, Maritza A. González, J. Jesús Bongiovanni, Ángel Cedrés, Bernabé Cerviño, Miguel Cruz-González, Irene Elías-Chávez, Mauricio Herrera-Edoqui, Martín Ibarra-Medel, Héctor J. Krongold, Yair Nadolny, Jakub Negrete, C. Alenka García, Ana María Pérez De Diego, José A. González-Serrano, J. Ignacio Hernández-Toledo, Héctor Pérez-Martínez, Ricardo Sánchez-Portal, Miguel Astrophysics of Galaxies 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. |
| title | The Lockman--SpReSO project. Main properties of infrared selected star-forming galaxies |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2404.13629 |