Reionization of the Milky Way, M31, and their satellites - I. Reionization history and star formation
Entity
UAM. Departamento de Física TeóricaPublisher
Oxford University Press on behalf of the Royal Astronomical SocietyDate
2018-02-27Citation
10.1093/mnras/sty494
Monthly Notices of the Royal Astronomical Society 477.1 (2018): 867-881
ISSN
0035-8711 (print); 1365-2966 (online)DOI
10.1093/mnras/sty494Funded by
This work was supported by the Science and Technology Facilities Council [grant numbers ST/F002858/1 and ST/I000976/1] and the Southeast Physics Network (SEPNet). AK and GY were supported by the Ministerio de Economía y Competitividad and the Fondo Europeo de Desarrollo Regional (MINECO/FEDER, UE) in Spain through grants AYA2012-31101 and AYA2015-63810-P. AK thanks the Consolider-Ingenio 2010 Programme of the Spanish Ministerio de Ciencia e Innovación (MICINN) under grant MultiDark CSD2009-00064. He also acknowledges support from the Australian Research Council (ARC) grant DP140100198. YH was supported by the Israel Science Foundation (1013/12)Project
Gobierno de España. AYA2012-31101; Gobierno de España. AYA2015-63810-P.; Gobierno de España. CSD2009-00064Editor's Version
http://doi.org/10.1093/mnras/sty494Subjects
Dark ages; First stars; Galaxies: Star formation; Large-scale structure of Universe; Local Group; Radiative transfer; Reionization; FísicaRights
© 2018 The AuthorsAbstract
Observations of the Milky Way (MW), M31, and their vicinity, known as the Local Group (LG), can provide clues about the sources of reionization. We present a suite of radiative transfer simulations based on initial conditions provided by the Constrained Local UniversE Simulations (CLUES) project that are designed to recreate the Local Universe, including a realistic MW-M31 pair and a nearby Virgo. Our box size (91Mpc) is large enough to incorporate the relevant sources of ionizing photons for the LG. We employ a range of source models, mimicking the potential effects of radiative feedback for dark matter haloes between ~108and 109M⊙. Although the LG mostly reionizes in an inside-out fashion, the final 40 per cent of its ionization shows some outside influence. For the LG satellites, we find no evidence that their redshift of reionization is related to the present-day mass of the satellite or the distance from the central galaxy. We find that fewer than 20 per cent of present-day satellites for MW and M31 have undergone any star formation prior to the end of global reionization. Approximately 5 per cent of these satellites could be classified as fossils,meaning the majority of star formation occurred at these early times. The more massive satellites have more cumulative star formation prior to the end of global reionization, but the scatter is significant, especially at the low-mass end. Present-day mass and distance from the central galaxy are poor predictors for the presence of ancient stellar populations in satellite galaxies
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Google Scholar:Dixon, Keri L.
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Iliev, Ilian T.
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Gottlöber, Stefan
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Yepes Alonso, Gustavo
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Knebe, Alexander
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Libeskind, Noam I.
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Hoffman, Yehuda
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