Semi-analytic galaxies : II. Revealing the role of environmental and mass quenching in galaxy formation
We use the semi-analytic model of galaxy formation SAG to study the relevance of mass and environmental quenching on satellite galaxies. We find that environmental processes dominate the star formation (SF) quenching of low-mass satellites (M⋆ ≲ 10<sup>10.5</sup> M⊙), whereas high-mass...
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| Autores principales: | , , , |
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| Formato: | Articulo Preprint |
| Lenguaje: | Inglés |
| Publicado: |
2019
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/125383 |
| Aporte de: |
| id |
I19-R120-10915-125383 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Astronomía galaxies: clusters: general galaxies: formation galaxies: evolution methods: numerical |
| spellingShingle |
Astronomía galaxies: clusters: general galaxies: formation galaxies: evolution methods: numerical Cora, Sofía Alejandra Hough, Tomás Vega Martínez, Cristian Antonio Orsi, Álvaro A. Semi-analytic galaxies : II. Revealing the role of environmental and mass quenching in galaxy formation |
| topic_facet |
Astronomía galaxies: clusters: general galaxies: formation galaxies: evolution methods: numerical |
| description |
We use the semi-analytic model of galaxy formation SAG to study the relevance of mass and environmental quenching on satellite galaxies. We find that environmental processes dominate the star formation (SF) quenching of low-mass satellites (M⋆ ≲ 10<sup>10.5</sup> M⊙), whereas high-mass galaxies typically quench as centrals. High-mass galaxies that remain actively forming stars while being accreted are found to be mainly affected by mass quenching after their first infall. For a given stellar mass, our model predicts SF quenching to be less efficient in low-mass haloes both before and after infall, in contradiction with common interpretations of observational data. Our model supports a two-stage scenario to explain the SF quenching. Initially, the SF of satellites resembles that of centrals until the gas cooling rate is reduced to approximately half its value at infall. Then, the SF fades through secular processes that exhaust the cold gas reservoir. This reservoir is not replenished efficiently due to the action of either ram-pressure stripping of the hot gas in low-mass satellites, or feedback from the active galactic nucleus in high-mass satellites. The delay times for the onset of SF quenching are found to range from ≈3 to ≈1Gyr for low-mass (M⋆ ≈ 10¹⁰ M⊙) and high-mass (M⋆ ≈ 10¹¹ M⊙) satellites, respectively. SF fades in ≈1Gyr, largely independent of stellar mass. We find that the SF quenching of low-mass satellites supports the so-called delay-then-rapid quenching scenario. However, the SF history of z = 0 passive satellites of any stellar mass is better described by a delay-then-fade quenching scenario. |
| format |
Articulo Preprint |
| author |
Cora, Sofía Alejandra Hough, Tomás Vega Martínez, Cristian Antonio Orsi, Álvaro A. |
| author_facet |
Cora, Sofía Alejandra Hough, Tomás Vega Martínez, Cristian Antonio Orsi, Álvaro A. |
| author_sort |
Cora, Sofía Alejandra |
| title |
Semi-analytic galaxies : II. Revealing the role of environmental and mass quenching in galaxy formation |
| title_short |
Semi-analytic galaxies : II. Revealing the role of environmental and mass quenching in galaxy formation |
| title_full |
Semi-analytic galaxies : II. Revealing the role of environmental and mass quenching in galaxy formation |
| title_fullStr |
Semi-analytic galaxies : II. Revealing the role of environmental and mass quenching in galaxy formation |
| title_full_unstemmed |
Semi-analytic galaxies : II. Revealing the role of environmental and mass quenching in galaxy formation |
| title_sort |
semi-analytic galaxies : ii. revealing the role of environmental and mass quenching in galaxy formation |
| publishDate |
2019 |
| url |
http://sedici.unlp.edu.ar/handle/10915/125383 |
| work_keys_str_mv |
AT corasofiaalejandra semianalyticgalaxiesiirevealingtheroleofenvironmentalandmassquenchingingalaxyformation AT houghtomas semianalyticgalaxiesiirevealingtheroleofenvironmentalandmassquenchingingalaxyformation AT vegamartinezcristianantonio semianalyticgalaxiesiirevealingtheroleofenvironmentalandmassquenchingingalaxyformation AT orsialvaroa semianalyticgalaxiesiirevealingtheroleofenvironmentalandmassquenchingingalaxyformation |
| bdutipo_str |
Repositorios |
| _version_ |
1764820451582803968 |