The MAGPI Survey: the subtle role of environment and not-so-subtle impact of generations of stars on galaxy dynamics
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| author | Foster, Caroline Bellstedt, Sabine DEugenio, Francesco Poci, Adriano Bagge, Ryan Harborne, Katherine Venville, Thomas Mendel, J. Trevor Lagos, Claudia Del P. Wisnioski, Emily Barone, Tania M. Battisti, Andrew J. Barsanti, Stefania Brough, Sarah Croom, Scott M. Derkenne, Caro Kimmig, Lucas C. Mailvaganam, Anilkumar Remus, Rhea-Silvia Sharma, Gauri Sweet, Sarah M. Thater, Sabine Valenzuela, Lucas M. van de Sande, Jesse Vaughan, Sam P. Ziegler, Bodo |
| author_facet | Foster, Caroline Bellstedt, Sabine DEugenio, Francesco Poci, Adriano Bagge, Ryan Harborne, Katherine Venville, Thomas Mendel, J. Trevor Lagos, Claudia Del P. Wisnioski, Emily Barone, Tania M. Battisti, Andrew J. Barsanti, Stefania Brough, Sarah Croom, Scott M. Derkenne, Caro Kimmig, Lucas C. Mailvaganam, Anilkumar Remus, Rhea-Silvia Sharma, Gauri Sweet, Sarah M. Thater, Sabine Valenzuela, Lucas M. van de Sande, Jesse Vaughan, Sam P. Ziegler, Bodo |
| contents | The stellar age and mass of galaxies have been suggested as the primary determinants for the dynamical state of galaxies, with environment seemingly playing no or only a very minor role. We use a sample of 77 galaxies at intermediate redshift (z~0.3) in the Middle-Ages Galaxies Properties with Integral field spectroscopy (MAGPI) Survey to study the subtle impact of environment on galaxy dynamics. We use a combination of statistical techniques (simple and partial correlations and principal component analysis) to isolate the contribution of environment on galaxy dynamics, while explicitly accounting for known factors such as stellar age, star formation histories and stellar masses. We consider these dynamical parameters: high-order kinematics of the line-of-sight velocity distribution (parametrised by the Gauss-Hermite coefficients $h_3$ and $h_4$), kinematic asymmetries $V_{\rm asym}$ derived using kinemetry and the observational spin parameter proxy $λ_{R_e}$. Of these, the mean $h_4$ is the only parameter found to have a significant correlation with environment as parametrised by group dynamical mass. This correlation exists even after accounting for age and stellar mass trends. Finally, we confirm that variations in the spin parameter $λ_{R_e}$ are most strongly (anti-)correlated with age as seen in local studies, and show that this dependence is well-established by z~0.3. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_08461 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The MAGPI Survey: the subtle role of environment and not-so-subtle impact of generations of stars on galaxy dynamics Foster, Caroline Bellstedt, Sabine DEugenio, Francesco Poci, Adriano Bagge, Ryan Harborne, Katherine Venville, Thomas Mendel, J. Trevor Lagos, Claudia Del P. Wisnioski, Emily Barone, Tania M. Battisti, Andrew J. Barsanti, Stefania Brough, Sarah Croom, Scott M. Derkenne, Caro Kimmig, Lucas C. Mailvaganam, Anilkumar Remus, Rhea-Silvia Sharma, Gauri Sweet, Sarah M. Thater, Sabine Valenzuela, Lucas M. van de Sande, Jesse Vaughan, Sam P. Ziegler, Bodo Astrophysics of Galaxies The stellar age and mass of galaxies have been suggested as the primary determinants for the dynamical state of galaxies, with environment seemingly playing no or only a very minor role. We use a sample of 77 galaxies at intermediate redshift (z~0.3) in the Middle-Ages Galaxies Properties with Integral field spectroscopy (MAGPI) Survey to study the subtle impact of environment on galaxy dynamics. We use a combination of statistical techniques (simple and partial correlations and principal component analysis) to isolate the contribution of environment on galaxy dynamics, while explicitly accounting for known factors such as stellar age, star formation histories and stellar masses. We consider these dynamical parameters: high-order kinematics of the line-of-sight velocity distribution (parametrised by the Gauss-Hermite coefficients $h_3$ and $h_4$), kinematic asymmetries $V_{\rm asym}$ derived using kinemetry and the observational spin parameter proxy $λ_{R_e}$. Of these, the mean $h_4$ is the only parameter found to have a significant correlation with environment as parametrised by group dynamical mass. This correlation exists even after accounting for age and stellar mass trends. Finally, we confirm that variations in the spin parameter $λ_{R_e}$ are most strongly (anti-)correlated with age as seen in local studies, and show that this dependence is well-established by z~0.3. |
| title | The MAGPI Survey: the subtle role of environment and not-so-subtle impact of generations of stars on galaxy dynamics |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2501.08461 |