The specific star formation rate function at different mass scales and quenching: a comparison between cosmological models and SDSS
| Autor: | Romeel Davé, Antonios Katsianis, Xiaohu Yang, Ping Zhao, Yu Luo, Haojie Xu, Xianzhong Zheng, Weiguang Cui, Claudia del P. Lagos |
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| Rok vydání: | 2020 |
| Předmět: |
ACTIVE GALACTIC NUCLEI
formation [galaxies] Stellar mass astro-ph.GA Star (game theory) Population FOS: Physical sciences Astrophysics 01 natural sciences SIMULATING GALAXY FORMATION 0103 physical sciences SEMIANALYTIC MODELS education Instrumentation and Methods for Astrophysics (astro-ph.IM) RED SEQUENCE 010303 astronomy & astrophysics evolution [galaxies] Physics ILLUSTRIS PROJECT education.field_of_study theory [cosmology] 010308 nuclear & particles physics Star formation COLOR DISTRIBUTIONS numerical [methods] Astronomy and Astrophysics BLACK-HOLE GROWTH Astrophysics - Astrophysics of Galaxies EVOLUTION Galaxy Distribution (mathematics) Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) EAGLE SIMULATIONS star formation [galaxies] STELLAR MASS Astrophysics - Instrumentation and Methods for Astrophysics Low Mass Rate function astro-ph.IM |
| Zdroj: | Monthly Notices of the Royal Astronomical Society Katsianis, A, Xu, H, Yang, X, Luo, Y, Cui, W, Davé, R, Lagos, C D P, Zheng, X & Zhao, P 2021, ' The specific star formation rate function at different mass scales and quenching: a comparison between cosmological models and SDSS ', Monthly Notices of the Royal Astronomical Society, vol. 500, no. 2, pp. 2036-2048 . https://doi.org/10.1093/mnras/staa3236 Katsianis, A, Xu, H, Yang, X, Luo, Y, Cui, W, Dave, R, Lagos, C D P, Zheng, X & Zhao, P 2021, ' The specific star formation rate function at different mass scales and quenching : a comparison between cosmological models and SDSS ', Monthly Notices of the Royal Astronomical Society, vol. 500, no. 2, pp. 2036-2048 . https://doi.org/10.1093/mnras/staa3236 |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/staa3236 |
| Popis: | We present the eddington bias corrected Specific Star Formation Rate Function (sSFRF) at different stellar mass scales from a sub-sample of the Sloan Digital Sky Survey Data Release DR7 (SDSS), which is considered complete both in terms of stellar mass (${\rm M_{\star}}$) and star formation rate (SFR). The above enable us to study qualitatively and quantitatively quenching, the distribution of passive/star-forming galaxies and perform comparisons with the predictions from state-of-the-art cosmological models, within the same ${\rm M_{\star}}$ and SFR limits. We find that at the low mass end (${\rm M_{\star}} = 10^{9.5} - 10^{10} \, {\rm M_{\odot}}$) the sSFRF is mostly dominated by star-forming objects. However, moving to the two more massive bins (${\rm M_{\star}} = 10^{10} - 10^{10.5} \, {\rm M_{\odot}}$ and ${\rm M_{\star}} = 10^{10.5} - 10^{11} \, {\rm M_{\odot}}$) a bi-modality with two peaks emerges. One peak represents the star-forming population, while the other describes a rising passive population. The bi-modal form of the sSFRFs is not reproduced by a range of cosmological simulations (e.g. Illustris, EAGLE, Mufasa, IllustrisTNG) which instead generate mostly the star-forming population, while a bi-modality emerges in others (e.g. L-Galaxies, Shark, Simba). Our findings reflect the need for the employed quenching schemes in state-of-the-art models to be reconsidered, involving prescriptions that allow "quenched galaxies" to retain a small level of SF activity (sSFR $=$ ${\rm 10^{-11} {\rm yr^{-1}}}$-${\rm 10^{-12} {\rm yr^{-1}}}$) and generate an adequate passive population/bi-modality even at intermediate masses (${\rm M_{\star}} = 10^{10} - 10^{10.5} \, {\rm M_{\odot}}$). 13 pages, 4 Figures, Accepted to MNRAS |
| Databáze: | OpenAIRE |
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