Gas properties as a function of environment in the proto-supercluster Hyperion at z ~ 2.45
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| Formato: | Preprint |
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2025
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| author | Gururajan, G. Cucciati, O. Lemaux, B. C. Talia, M. Zamorani, G. Pozzi, F. Decarli, R. Forrest, B. Shen, L. De Lucia, G. Fontanot, F. Bardelli, S. Baxter, D. C. Cassarà, L. P. Golden-Marx, E. Sikorski, D. Shah, E. A. Gal, R. R. Giavalisco, M. Giddings, F. Hathi, N. P. Hung, D. Koekemoer, A. M. Brun, V. Le Lubin, L. M. Tasca, L. A. M. Tresse, L. Vergani, D. Zucca, E. |
| author_facet | Gururajan, G. Cucciati, O. Lemaux, B. C. Talia, M. Zamorani, G. Pozzi, F. Decarli, R. Forrest, B. Shen, L. De Lucia, G. Fontanot, F. Bardelli, S. Baxter, D. C. Cassarà, L. P. Golden-Marx, E. Sikorski, D. Shah, E. A. Gal, R. R. Giavalisco, M. Giddings, F. Hathi, N. P. Hung, D. Koekemoer, A. M. Brun, V. Le Lubin, L. M. Tasca, L. A. M. Tresse, L. Vergani, D. Zucca, E. |
| contents | The cosmic star-formation rate density, molecular gas density and the AGN activity of the Universe peak at z~ 2-3, showing the Universe is most active at this epoch. The nature of the galaxies at these redshifts and their properties as a function of their environment are particularly interesting to understand the mechanisms driving their star-formation and quenching. At z~ 2.5, a massive (~ 4.8 X 10^15 Msun) proto-supercluster, Hyperion, was identified Cucciati et al. 2018, consisting of 7 groups/peaks and extending over a comoving volume of 60 X 60 X 150 Mpc^3, providing an excellent laboratory to probe the properties and evolution of galaxies as a function of their environments. We use a large compilation of photometric (optical to radio wavelengths, COSMOS2020, COSMOS-Super-deblended, and, A3COSMOS) and spectroscopic (C3VO, HST-Hyperion, VUDS, zCOSMOS, DEIMOS10K, MAGAZ3NE) data to assign membership and study the relation between the local environment and the molecular gas mass, the star-formation rate (SFR), gas depletion timescales, and quenching mechanisms. We find that the depletion timescales and the molecular gas fractions decrease and SFR increases in denser environments at the ~ 2 sigma level, suggesting accelerated evolution in the densest regions of this proto-supercluster resulting from gas stripping, over-consumption, and/or cessation of cold flows. Dedicated observations at sub-millimeter wavelengths enabling further spectroscopic confirmation and better coverage in the sub-millimetric (sub-mm) wavelengths can provide more conclusive results on the environmental implications on gas reservoirs of galaxies in Hyperion. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_08894 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Gas properties as a function of environment in the proto-supercluster Hyperion at z ~ 2.45 Gururajan, G. Cucciati, O. Lemaux, B. C. Talia, M. Zamorani, G. Pozzi, F. Decarli, R. Forrest, B. Shen, L. De Lucia, G. Fontanot, F. Bardelli, S. Baxter, D. C. Cassarà, L. P. Golden-Marx, E. Sikorski, D. Shah, E. A. Gal, R. R. Giavalisco, M. Giddings, F. Hathi, N. P. Hung, D. Koekemoer, A. M. Brun, V. Le Lubin, L. M. Tasca, L. A. M. Tresse, L. Vergani, D. Zucca, E. Astrophysics of Galaxies The cosmic star-formation rate density, molecular gas density and the AGN activity of the Universe peak at z~ 2-3, showing the Universe is most active at this epoch. The nature of the galaxies at these redshifts and their properties as a function of their environment are particularly interesting to understand the mechanisms driving their star-formation and quenching. At z~ 2.5, a massive (~ 4.8 X 10^15 Msun) proto-supercluster, Hyperion, was identified Cucciati et al. 2018, consisting of 7 groups/peaks and extending over a comoving volume of 60 X 60 X 150 Mpc^3, providing an excellent laboratory to probe the properties and evolution of galaxies as a function of their environments. We use a large compilation of photometric (optical to radio wavelengths, COSMOS2020, COSMOS-Super-deblended, and, A3COSMOS) and spectroscopic (C3VO, HST-Hyperion, VUDS, zCOSMOS, DEIMOS10K, MAGAZ3NE) data to assign membership and study the relation between the local environment and the molecular gas mass, the star-formation rate (SFR), gas depletion timescales, and quenching mechanisms. We find that the depletion timescales and the molecular gas fractions decrease and SFR increases in denser environments at the ~ 2 sigma level, suggesting accelerated evolution in the densest regions of this proto-supercluster resulting from gas stripping, over-consumption, and/or cessation of cold flows. Dedicated observations at sub-millimeter wavelengths enabling further spectroscopic confirmation and better coverage in the sub-millimetric (sub-mm) wavelengths can provide more conclusive results on the environmental implications on gas reservoirs of galaxies in Hyperion. |
| title | Gas properties as a function of environment in the proto-supercluster Hyperion at z ~ 2.45 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2504.08894 |