تقرير
MIDIS: The Relation between Strong (Hb+[OIII]) Emission, Star Formation and Burstiness Around the Epoch of Reionization
| العنوان: | MIDIS: The Relation between Strong (Hb+[OIII]) Emission, Star Formation and Burstiness Around the Epoch of Reionization |
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| المؤلفون: | 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. |
| سنة النشر: | 2023 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | 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. Comment: 14 pages, 8 figures. Accepted for publication at the ApJ. Version v3 includes minor update to match journal version |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2311.12691 |
| رقم الأكسشن: | edsarx.2311.12691 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |