The MAGPI Survey: the kinematic morphology-density relation (or lack thereof) and the Hubble sequence at $z\sim0.3$
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2025
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| author | Foster, Caroline Donoghoe, Mark W. Battisti, Andrew D'Eugenio, Francesco Harborne, Katherine Venville, Thomas Lagos, Claudia Del P. Mendel, J. Trevor Bagge, Ryan Barsanti, Stefania Bellstedt, Sabine Boecker, Alina Chen, Qianhui Derkenne, Caro Ferre-Matteu, Anna Gjergo, Eda Gupta, Anshu Muller, Eric G. M. Santucci, Giulia Park, Hye-Jin Remus, Rhea-Silvia Thater, Sabine van de Sande, Jesse Vaughan, Sam Brough, Sarah Croom, Scott M. Valenzuela, Lucas M. Wisnioski, Emily Team, the MAGPI |
| author_facet | Foster, Caroline Donoghoe, Mark W. Battisti, Andrew D'Eugenio, Francesco Harborne, Katherine Venville, Thomas Lagos, Claudia Del P. Mendel, J. Trevor Bagge, Ryan Barsanti, Stefania Bellstedt, Sabine Boecker, Alina Chen, Qianhui Derkenne, Caro Ferre-Matteu, Anna Gjergo, Eda Gupta, Anshu Muller, Eric G. M. Santucci, Giulia Park, Hye-Jin Remus, Rhea-Silvia Thater, Sabine van de Sande, Jesse Vaughan, Sam Brough, Sarah Croom, Scott M. Valenzuela, Lucas M. Wisnioski, Emily Team, the MAGPI |
| contents | This work presents visual morphological and dynamical classifications for 637 spatially resolved galaxies, most of which are at intermediate redshift ($z\sim0.3$), in the Middle-Ages Galaxy Properties with Integral field spectroscopy (MAGPI) Survey. For each galaxy, we obtain a minimum of 11 independent visual classifications by knowledgeable classifiers. We use an extension of the standard Dawid-Skene bayesian model introducing classifier-specific confidence parameters and galaxy-specific difficulty parameters to quantify classifier confidence and infer reliable statistical confidence estimates. Selecting sub-samples of 86 bright ($r<20$ mag) high-confidence ($>0.98$) morphological classifications at redshifts ($0.2 \le z \le0.4$), we confirm the full range of morphological types is represented in MAGPI as intended in the survey design. Similarly, with a sub-sample of 82 bright high-confidence stellar kinematic classifications, we find that the rotating and non-rotating galaxies seen at low redshift are already in place at intermediate redshifts. We \textit{do not} find evidence that the kinematic morphology-density relation seen at $z\sim0$ is established at $z\sim0.3$. We suggest that galaxies without obvious stellar rotation are dynamically pre-processed sometime before $z\sim0.3$ within lower mass groups before joining denser environments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_16751 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The MAGPI Survey: the kinematic morphology-density relation (or lack thereof) and the Hubble sequence at $z\sim0.3$ Foster, Caroline Donoghoe, Mark W. Battisti, Andrew D'Eugenio, Francesco Harborne, Katherine Venville, Thomas Lagos, Claudia Del P. Mendel, J. Trevor Bagge, Ryan Barsanti, Stefania Bellstedt, Sabine Boecker, Alina Chen, Qianhui Derkenne, Caro Ferre-Matteu, Anna Gjergo, Eda Gupta, Anshu Muller, Eric G. M. Santucci, Giulia Park, Hye-Jin Remus, Rhea-Silvia Thater, Sabine van de Sande, Jesse Vaughan, Sam Brough, Sarah Croom, Scott M. Valenzuela, Lucas M. Wisnioski, Emily Team, the MAGPI Astrophysics of Galaxies This work presents visual morphological and dynamical classifications for 637 spatially resolved galaxies, most of which are at intermediate redshift ($z\sim0.3$), in the Middle-Ages Galaxy Properties with Integral field spectroscopy (MAGPI) Survey. For each galaxy, we obtain a minimum of 11 independent visual classifications by knowledgeable classifiers. We use an extension of the standard Dawid-Skene bayesian model introducing classifier-specific confidence parameters and galaxy-specific difficulty parameters to quantify classifier confidence and infer reliable statistical confidence estimates. Selecting sub-samples of 86 bright ($r<20$ mag) high-confidence ($>0.98$) morphological classifications at redshifts ($0.2 \le z \le0.4$), we confirm the full range of morphological types is represented in MAGPI as intended in the survey design. Similarly, with a sub-sample of 82 bright high-confidence stellar kinematic classifications, we find that the rotating and non-rotating galaxies seen at low redshift are already in place at intermediate redshifts. We \textit{do not} find evidence that the kinematic morphology-density relation seen at $z\sim0$ is established at $z\sim0.3$. We suggest that galaxies without obvious stellar rotation are dynamically pre-processed sometime before $z\sim0.3$ within lower mass groups before joining denser environments. |
| title | The MAGPI Survey: the kinematic morphology-density relation (or lack thereof) and the Hubble sequence at $z\sim0.3$ |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2502.16751 |