The MAGPI Survey: Evolution of radial trends in star formation activity across cosmic time
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916222498504704 |
|---|---|
| author | Mun, Marcie Wisnioski, Emily Battisti, Andrew J. Mendel, J. Trevor Ellison, Sara L. Taylor, Edward N. Lagos, Claudia D. P. Harborne, Katherine E. Foster, Caroline Croom, Scott M. Bellstedt, Sabine Barsanti, Stefania Gupta, Anshu Valenzuela, Lucas M. Chen, Qian-Hui Grasha, Kathryn Mukherjee, Tamal Park, Hye-Jin Sharda, Piyush Sweet, Sarah M. Remus, Rhea-Silvia Zafar, Tayyaba |
| author_facet | Mun, Marcie Wisnioski, Emily Battisti, Andrew J. Mendel, J. Trevor Ellison, Sara L. Taylor, Edward N. Lagos, Claudia D. P. Harborne, Katherine E. Foster, Caroline Croom, Scott M. Bellstedt, Sabine Barsanti, Stefania Gupta, Anshu Valenzuela, Lucas M. Chen, Qian-Hui Grasha, Kathryn Mukherjee, Tamal Park, Hye-Jin Sharda, Piyush Sweet, Sarah M. Remus, Rhea-Silvia Zafar, Tayyaba |
| contents | Using adaptive optics with the Multi-Unit Spectroscopic Explorer (MUSE) on the Very Large Telescope (VLT), the Middle Ages Galaxy Properties with Integral Field Spectroscopy (MAGPI) survey allows us to study the spatially resolved Universe at a crucial time of ~4 Gyr ago ($z$ ~ 0.3) when simulations predict the greatest diversity in evolutionary pathways for galaxies. We investigate the radial trends in the star formation (SF) activity and luminosity-weighted stellar ages as a function of offset from the star-forming main sequence (SFMS) for a total of 294 galaxies. Using both H$α$ emission and the 4000 Angstrom break (i.e., D4000) as star formation rate (SFR) tracers, we find overall flat radial profiles for galaxies lying on and above the SFMS, suggestive of physical processes that enhance/regulate SF throughout the entire galaxy disc. However, for galaxies lying below the SFMS, we find positive gradients in SF suggestive of inside-out quenching. Placing our results in context with results from other redshift regimes suggests an evolution in radial trends at $z$ ~ 0.3 for SF galaxies above the SFMS, from uniformly enhanced SF at $z$ ~ 1 and $z$ ~ 0.3 to centrally enhanced SF at $z$ ~ 0 (when averaged over a wide range of mass). We also capture higher local SFRs for galaxies below the SFMS compared to that of $z$ ~ 0, which can be explained by a larger population of quenched satellites in the local Universe and/or different treatments of limitations set by the D4000-sSFR relation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_16319 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The MAGPI Survey: Evolution of radial trends in star formation activity across cosmic time Mun, Marcie Wisnioski, Emily Battisti, Andrew J. Mendel, J. Trevor Ellison, Sara L. Taylor, Edward N. Lagos, Claudia D. P. Harborne, Katherine E. Foster, Caroline Croom, Scott M. Bellstedt, Sabine Barsanti, Stefania Gupta, Anshu Valenzuela, Lucas M. Chen, Qian-Hui Grasha, Kathryn Mukherjee, Tamal Park, Hye-Jin Sharda, Piyush Sweet, Sarah M. Remus, Rhea-Silvia Zafar, Tayyaba Astrophysics of Galaxies Using adaptive optics with the Multi-Unit Spectroscopic Explorer (MUSE) on the Very Large Telescope (VLT), the Middle Ages Galaxy Properties with Integral Field Spectroscopy (MAGPI) survey allows us to study the spatially resolved Universe at a crucial time of ~4 Gyr ago ($z$ ~ 0.3) when simulations predict the greatest diversity in evolutionary pathways for galaxies. We investigate the radial trends in the star formation (SF) activity and luminosity-weighted stellar ages as a function of offset from the star-forming main sequence (SFMS) for a total of 294 galaxies. Using both H$α$ emission and the 4000 Angstrom break (i.e., D4000) as star formation rate (SFR) tracers, we find overall flat radial profiles for galaxies lying on and above the SFMS, suggestive of physical processes that enhance/regulate SF throughout the entire galaxy disc. However, for galaxies lying below the SFMS, we find positive gradients in SF suggestive of inside-out quenching. Placing our results in context with results from other redshift regimes suggests an evolution in radial trends at $z$ ~ 0.3 for SF galaxies above the SFMS, from uniformly enhanced SF at $z$ ~ 1 and $z$ ~ 0.3 to centrally enhanced SF at $z$ ~ 0 (when averaged over a wide range of mass). We also capture higher local SFRs for galaxies below the SFMS compared to that of $z$ ~ 0, which can be explained by a larger population of quenched satellites in the local Universe and/or different treatments of limitations set by the D4000-sSFR relation. |
| title | The MAGPI Survey: Evolution of radial trends in star formation activity across cosmic time |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2404.16319 |