The effect of local and large scale environment on the star formation histories of galaxies
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| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| author | Torres-Ríos, G. Pérez, I. Verley, S. Domínguez-Gómez, J. Argudo-Fernández, M. Puertas, S. Duarte Jiménez, A. Ruiz-Lara, T. Zurita, A. Bidaran, B. Conrado, A. Espada, D. García-Benito, R. Delgado, R. M. González Falcón-Barroso, J. Florido, E. Sánchez-Blázquez, P. Sánchez-Menguiano, L. |
| author_facet | Torres-Ríos, G. Pérez, I. Verley, S. Domínguez-Gómez, J. Argudo-Fernández, M. Puertas, S. Duarte Jiménez, A. Ruiz-Lara, T. Zurita, A. Bidaran, B. Conrado, A. Espada, D. García-Benito, R. Delgado, R. M. González Falcón-Barroso, J. Florido, E. Sánchez-Blázquez, P. Sánchez-Menguiano, L. |
| contents | We aim to investigate how the local environment influences the star formation history (SFH) of galaxies residing in various large-scale environments. We categorise a sample of 9384 galaxies into the three primary large scale structures (voids, walls \& filaments, and clusters) and further classify them based on their local environment (as either "singlets" or group members), through a search of companion galaxies within sky-projected distances $Δr_p < 0.45$ Mpc and velocity differences $Δv < 160$ $\text{km s}^{-1}$. Subsequently, we explore these subsamples through SFH data from previous works. Throughout the study, galaxies are divided into long-timescale SFH galaxies (LT-SFH), which assemble their mass steadily along cosmic time, and short-timescale SFH galaxies (ST-SFH), which form their stars early. We then compare characteristic mass assembly look-back times. The distributions of mass assembly look-back times in ST-SFH galaxies are statistically different for singlets and groups. These differences are only found in LT-SFH galaxies when studying these distributions in stellar mass bins. Our results indicate that the large-scale environment is related to a delay in mass assembly of up to $\sim$2 Gyr, while this delay is $<$1 Gyr in the case of local environment. The effect of both kinds of environment is more significant in less massive galaxies, and in LT-SFHs. Our results are consistent with galaxies in groups assembling their stellar mass earlier than singlets, especially in voids and lower mass galaxies. Local environment plays a relevant role in stellar mass assembly times, although we find that large-scale structures also cause a delay in mass assembly, more so in the case of cluster galaxies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_00959 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The effect of local and large scale environment on the star formation histories of galaxies Torres-Ríos, G. Pérez, I. Verley, S. Domínguez-Gómez, J. Argudo-Fernández, M. Puertas, S. Duarte Jiménez, A. Ruiz-Lara, T. Zurita, A. Bidaran, B. Conrado, A. Espada, D. García-Benito, R. Delgado, R. M. González Falcón-Barroso, J. Florido, E. Sánchez-Blázquez, P. Sánchez-Menguiano, L. Astrophysics of Galaxies We aim to investigate how the local environment influences the star formation history (SFH) of galaxies residing in various large-scale environments. We categorise a sample of 9384 galaxies into the three primary large scale structures (voids, walls \& filaments, and clusters) and further classify them based on their local environment (as either "singlets" or group members), through a search of companion galaxies within sky-projected distances $Δr_p < 0.45$ Mpc and velocity differences $Δv < 160$ $\text{km s}^{-1}$. Subsequently, we explore these subsamples through SFH data from previous works. Throughout the study, galaxies are divided into long-timescale SFH galaxies (LT-SFH), which assemble their mass steadily along cosmic time, and short-timescale SFH galaxies (ST-SFH), which form their stars early. We then compare characteristic mass assembly look-back times. The distributions of mass assembly look-back times in ST-SFH galaxies are statistically different for singlets and groups. These differences are only found in LT-SFH galaxies when studying these distributions in stellar mass bins. Our results indicate that the large-scale environment is related to a delay in mass assembly of up to $\sim$2 Gyr, while this delay is $<$1 Gyr in the case of local environment. The effect of both kinds of environment is more significant in less massive galaxies, and in LT-SFHs. Our results are consistent with galaxies in groups assembling their stellar mass earlier than singlets, especially in voids and lower mass galaxies. Local environment plays a relevant role in stellar mass assembly times, although we find that large-scale structures also cause a delay in mass assembly, more so in the case of cluster galaxies. |
| title | The effect of local and large scale environment on the star formation histories of galaxies |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2410.00959 |