MIDIS: Unveiling the Star Formation History in massive galaxies at $1<z<4.5$ with spectro-photometric analysis

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Bibliographic Details
Main Authors:	Annunziatella, M., Pérez-González, P. G., Álvarez-Márquez, J., Costantin, L., Iani, E., Labiano, Á., Rinaldi, P., Boogaard, L., Meyer, R. A., Östlin, G., Colina, L., Melinder, J., Jermann, I., Gillman, S., Langeroodi, D., Hjorth, J., Alonso-Herrero, A., Eckart, A., Walter, F., van der Werf, P. P., Bik, A., Peißker, F., Caputi, K. I., García-Marín, M., Wright, G., Greve, T. R.
Format:	Preprint
Published:	2025
Subjects:	Astrophysics of Galaxies
Online Access:	Acceder al recurso
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author	Annunziatella, M. Pérez-González, P. G. Álvarez-Márquez, J. Costantin, L. Iani, E. Labiano, Á. Rinaldi, P. Boogaard, L. Meyer, R. A. Östlin, G. Colina, L. Melinder, J. Jermann, I. Gillman, S. Langeroodi, D. Hjorth, J. Alonso-Herrero, A. Eckart, A. Walter, F. van der Werf, P. P. Bik, A. Peißker, F. Caputi, K. I. García-Marín, M. Wright, G. Greve, T. R.
author_facet	Annunziatella, M. Pérez-González, P. G. Álvarez-Márquez, J. Costantin, L. Iani, E. Labiano, Á. Rinaldi, P. Boogaard, L. Meyer, R. A. Östlin, G. Colina, L. Melinder, J. Jermann, I. Gillman, S. Langeroodi, D. Hjorth, J. Alonso-Herrero, A. Eckart, A. Walter, F. van der Werf, P. P. Bik, A. Peißker, F. Caputi, K. I. García-Marín, M. Wright, G. Greve, T. R.
contents	We investigate the star formation histories (SFHs) of a sample of massive galaxies ($M_\star \geq 10^{10} \, M_\odot$) in the redshift range $1 < z < 4.5$. We analyze spectro-photometric data combining broadband photometry from HST and JWST with low-resolution grism spectroscopy from JWST/NIRISS, obtained as part of the MIDIS (MIRI Deep Imaging Survey) program. SFHs are derived through spectral energy distribution (SED) fitting using two independent codes, BAGPIPES and Synthesizer, under various SFH assumptions. This approach enables a comprehensive assessment of the biases introduced by different modeling choices. The inclusion of NIRISS spectroscopy, even with its low resolution, significantly improves constraints on key physical parameters, such as the mass-weighted stellar age ($t_M$) and formation redshift ($z_{\mathrm{form}}$), by narrowing their posterior distributions. The massive galaxies in our sample exhibit rapid stellar mass assembly, forming 50\% of their mass between $3 \leq z \leq 9$. The highest inferred formation redshifts are compatible with elevated star formation efficiencies ($ε$) at early epochs. Non-parametric SFHs generally imply an earlier and slower mass assembly compared to parametric forms, highlighting the sensitivity of inferred formation timescales to the chosen SFH model, particularly for galaxies at $z < 2$. Quiescent galaxies are, on average, older ($t_M \sim 1.1$ Gyr) and assembled more rapidly at earlier times than their star-forming counterparts. These findings support the ``downsizing'' scenario, in which more massive and passive systems form earlier and more efficiently.
format	Preprint
id	arxiv_https___arxiv_org_abs_2508_16951
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	MIDIS: Unveiling the Star Formation History in massive galaxies at $1<z<4.5$ with spectro-photometric analysis Annunziatella, M. Pérez-González, P. G. Álvarez-Márquez, J. Costantin, L. Iani, E. Labiano, Á. Rinaldi, P. Boogaard, L. Meyer, R. A. Östlin, G. Colina, L. Melinder, J. Jermann, I. Gillman, S. Langeroodi, D. Hjorth, J. Alonso-Herrero, A. Eckart, A. Walter, F. van der Werf, P. P. Bik, A. Peißker, F. Caputi, K. I. García-Marín, M. Wright, G. Greve, T. R. Astrophysics of Galaxies We investigate the star formation histories (SFHs) of a sample of massive galaxies ($M_\star \geq 10^{10} \, M_\odot$) in the redshift range $1 < z < 4.5$. We analyze spectro-photometric data combining broadband photometry from HST and JWST with low-resolution grism spectroscopy from JWST/NIRISS, obtained as part of the MIDIS (MIRI Deep Imaging Survey) program. SFHs are derived through spectral energy distribution (SED) fitting using two independent codes, BAGPIPES and Synthesizer, under various SFH assumptions. This approach enables a comprehensive assessment of the biases introduced by different modeling choices. The inclusion of NIRISS spectroscopy, even with its low resolution, significantly improves constraints on key physical parameters, such as the mass-weighted stellar age ($t_M$) and formation redshift ($z_{\mathrm{form}}$), by narrowing their posterior distributions. The massive galaxies in our sample exhibit rapid stellar mass assembly, forming 50\% of their mass between $3 \leq z \leq 9$. The highest inferred formation redshifts are compatible with elevated star formation efficiencies ($ε$) at early epochs. Non-parametric SFHs generally imply an earlier and slower mass assembly compared to parametric forms, highlighting the sensitivity of inferred formation timescales to the chosen SFH model, particularly for galaxies at $z < 2$. Quiescent galaxies are, on average, older ($t_M \sim 1.1$ Gyr) and assembled more rapidly at earlier times than their star-forming counterparts. These findings support the ``downsizing'' scenario, in which more massive and passive systems form earlier and more efficiently.
title	MIDIS: Unveiling the Star Formation History in massive galaxies at $1<z<4.5$ with spectro-photometric analysis
topic	Astrophysics of Galaxies
url	https://arxiv.org/abs/2508.16951