MIDIS: The Relation between Strong (Hb+[OIII]) Emission, Star Formation and Burstiness Around the Epoch of Reionization
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arXiv
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| Formato: | Preprint |
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2023
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| author | Caputi, Karina I. Rinaldi, Pierluigi Iani, Edoardo Pérez-González, Pablo G. Ostlin, Göran Colina, Luis Greve, Thomas R. Nørgaard-Nielsen, Hans-Ulrik Wright, Gillian S. Alvarez-Márquez, Javier Eckart, Andreas Hjorth, Jens Labiano, Alvaro Fèvre, Olivier Le Walter, Fabian van der Werf, Paul Boogaard, Leindert Costantin, Luca Crespo-Gómez, Alejandro Gillman, Steven Jermann, Iris Langeroodi, Danial Melinder, Jens Peissker, Florian Güdel, Manuel Henning, Thomas Lagage, Pierre-Olivier Ray, Thomas P. |
| author_facet | Caputi, Karina I. Rinaldi, Pierluigi Iani, Edoardo Pérez-González, Pablo G. Ostlin, Göran Colina, Luis Greve, Thomas R. Nørgaard-Nielsen, Hans-Ulrik Wright, Gillian S. Alvarez-Márquez, Javier Eckart, Andreas Hjorth, Jens Labiano, Alvaro Fèvre, Olivier Le Walter, Fabian van der Werf, Paul Boogaard, Leindert Costantin, Luca Crespo-Gómez, Alejandro Gillman, Steven Jermann, Iris Langeroodi, Danial Melinder, Jens Peissker, Florian Güdel, Manuel Henning, Thomas Lagage, Pierre-Olivier Ray, Thomas P. |
| contents | We investigate the properties of strong (Hb+[OIII]) emitters before and after the end of the Epoch of Reionization from z=8 to z=5.5. We make use of ultra-deep JWST/NIRCam imaging in the Parallel Field of the MIRI Deep Imaging Survey (MIDIS) in the Hubble eXtreme Deep Field (P2-XDF), in order to select prominent (Hb+[OIII]) emitters (with rest EW_0 > 100 Angstroms) at z=5.5-7, based on their flux density enhancement in the F356W band with respect to the spectral energy distribution continuum. We complement our selection with other (Hb+[OIII]) emitters from the literature at similar and higher (z=7-8) redshifts. We find (non-independent) anti-correlations between EW_0(Hb+[OIII]) and both galaxy stellar mass and age, in agreement with previous studies, and a positive correlation with specific star formation rate (sSFR). On the SFR-M* plane, the (Hb+[OIII]) emitters populate both the star-formation main sequence and the starburst region, which become indistinguishable at low stellar masses (log10(M*) < 7.5). We find tentative evidence for a non-monotonic relation between EW_0(Hb+[OIII]) and SFR, such that both parameters correlate with each other at SFR > 1 Msun/yr, while the correlation flattens out at lower SFRs. This suggests that low metallicities producing high EW_0(Hb+[OIII]) could be important at low SFR values. Interestingly, the properties of the strong emitters and other galaxies (33% and 67% of our z=5.5-7 sample, respectively) are similar, including, in many cases, high sSFR. Therefore, it is crucial to consider both emitters and non-emitters to obtain a complete picture of the cosmic star formation activity around the Epoch of Reionization. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_12691 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | MIDIS: The Relation between Strong (Hb+[OIII]) Emission, Star Formation and Burstiness Around the Epoch of Reionization Caputi, Karina I. Rinaldi, Pierluigi Iani, Edoardo Pérez-González, Pablo G. Ostlin, Göran Colina, Luis Greve, Thomas R. Nørgaard-Nielsen, Hans-Ulrik Wright, Gillian S. Alvarez-Márquez, Javier Eckart, Andreas Hjorth, Jens Labiano, Alvaro Fèvre, Olivier Le Walter, Fabian van der Werf, Paul Boogaard, Leindert Costantin, Luca Crespo-Gómez, Alejandro Gillman, Steven Jermann, Iris Langeroodi, Danial Melinder, Jens Peissker, Florian Güdel, Manuel Henning, Thomas Lagage, Pierre-Olivier Ray, Thomas P. Astrophysics of Galaxies We investigate the properties of strong (Hb+[OIII]) emitters before and after the end of the Epoch of Reionization from z=8 to z=5.5. We make use of ultra-deep JWST/NIRCam imaging in the Parallel Field of the MIRI Deep Imaging Survey (MIDIS) in the Hubble eXtreme Deep Field (P2-XDF), in order to select prominent (Hb+[OIII]) emitters (with rest EW_0 > 100 Angstroms) at z=5.5-7, based on their flux density enhancement in the F356W band with respect to the spectral energy distribution continuum. We complement our selection with other (Hb+[OIII]) emitters from the literature at similar and higher (z=7-8) redshifts. We find (non-independent) anti-correlations between EW_0(Hb+[OIII]) and both galaxy stellar mass and age, in agreement with previous studies, and a positive correlation with specific star formation rate (sSFR). On the SFR-M* plane, the (Hb+[OIII]) emitters populate both the star-formation main sequence and the starburst region, which become indistinguishable at low stellar masses (log10(M*) < 7.5). We find tentative evidence for a non-monotonic relation between EW_0(Hb+[OIII]) and SFR, such that both parameters correlate with each other at SFR > 1 Msun/yr, while the correlation flattens out at lower SFRs. This suggests that low metallicities producing high EW_0(Hb+[OIII]) could be important at low SFR values. Interestingly, the properties of the strong emitters and other galaxies (33% and 67% of our z=5.5-7 sample, respectively) are similar, including, in many cases, high sSFR. Therefore, it is crucial to consider both emitters and non-emitters to obtain a complete picture of the cosmic star formation activity around the Epoch of Reionization. |
| title | MIDIS: The Relation between Strong (Hb+[OIII]) Emission, Star Formation and Burstiness Around the Epoch of Reionization |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2311.12691 |