التفاصيل البيبلوغرافية
| العنوان: |
Strongly time-variable ultraviolet metal-line emission from the circum-galactic medium of high-redshift galaxies |
| المؤلفون: |
Sravan, Niharika, Faucher-Giguère, Claude-André, van de Voort, Freeke, Kereš, Dušan, Muratov, Alexander L., Hopkins, Philip F., Feldmann, Robert, Quataert, Eliot, Murray, Norman |
| المصدر: |
Monthly Notices of the Royal Astronomical Society, 463(1), 120-133, (2016-11-21) |
| بيانات النشر: |
Royal Astronomical Society |
| سنة النشر: |
2016 |
| المجموعة: |
Caltech Authors (California Institute of Technology) |
| مصطلحات موضوعية: |
galaxies: evolution galaxies: formation galaxies: high-redshift galaxies: haloes intergalactic medium cosmology: theory |
| الوصف: |
We use cosmological simulations from the Feedback In Realistic Environments project, which implement a comprehensive set of stellar feedback processes, to study ultraviolet (UV) metal-line emission from the circum-galactic medium of high-redshift (z = 2–4) galaxies. Our simulations cover the halo mass range M_h ∼ 2 × 10^(11)–8.5 × 10^(12) M_⊙ at z = 2, representative of Lyman break galaxies. Of the transitions we analyse, the low-ionization C iii (977 Å) and Si iii (1207 Å) emission lines are the most luminous, with C iv (1548 Å) and Si iv (1394 Å) also showing interesting spatially extended structures. The more massive haloes are on average more UV-luminous. The UV metal-line emission from galactic haloes in our simulations arises primarily from collisionally ionized gas and is strongly time variable, with peak-to-trough variations of up to ∼2 dex. The peaks of UV metal-line luminosity correspond closely to massive and energetic mass outflow events, which follow bursts of star formation and inject sufficient energy into galactic haloes to power the metal-line emission. The strong time variability implies that even some relatively low-mass haloes may be detectable. Conversely, flux-limited samples will be biased towards haloes whose central galaxy has recently experienced a strong burst of star formation. Spatially extended UV metal-line emission around high-redshift galaxies should be detectable by current and upcoming integral field spectrographs such as the Multi Unit Spectroscopic Explorer on the Very Large Telescope and Keck Cosmic Web Imager. ; © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2016 August 4. Received 2016 August 4. In original form 2015 October 20. First published online August 8, 2016. We are grateful to Alex Richings for assistance with the local source test. The simulations analysed in this paper were run on XSEDE computational resources (allocations TG-AST120025, TG-AST130039, and TG-AST140023), on the ... |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| العلاقة: |
https://arxiv.org/abs/1510.06410Test; https://doi.org/10.1093/mnras/stw1962Test; oai:authors.library.caltech.edu:0zsqg-6ap93; eprintid:72341; resolverid:CaltechAUTHORS:20161128-151737516 |
| DOI: |
10.1093/mnras/stw1962 |
| الإتاحة: |
https://doi.org/10.1093/mnras/stw1962Test |
| حقوق: |
info:eu-repo/semantics/openAccess ; Other |
| رقم الانضمام: |
edsbas.14955BF2 |
| قاعدة البيانات: |
BASE |
