Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Nacional Autónoma de México
2020
|
| Subjects: | |
| Online Access: | https://www.redalyc.org/articulo.oa?id=57171642011 https://www.redalyc.org/journal/571/57171642011/ https://www.redalyc.org/journal/571/57171642011/html/ https://www.redalyc.org/journal/571/57171642011/57171642011.epub https://www.redalyc.org/journal/571/57171642011/movil |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866817177644957696 |
|---|---|
| author | L. A. García |
| author_facet | L. A. García |
| contents | Can UVB Variations Reconcile Simulated Quasar Absorption Lines at High Redshift? L. A. García E. V. Ryan-Weber Física, Astronomía y Matemáticas dark ages first stars reionization Cosmology: theory methods: numerical In this work we present new calculations of the observables associated with synthetic metal and HI absorption lines in the spectra of high redshift quasars, inspired by questions and limitations raised in work with a uniform Haardt-Madau 2012 ultraviolet background (UVB). We introduce variations at z ≈ 6 to the UVB and HI self-shielding and explore the sensitivity of the absorption features to modifications of the hardness of the UVB. We find that observed SiIV and low ionization states (e.g. CII, SiII, OI) are well represented by a soft UV ionizing field at z = 6, but this same prescription, fails to reproduce the statistical properties of the observed CIV ion absorber population. We conclude that small variations in the UVB (not greater than a dex below Haardt-Madau 2012 emissivity at 1 Ryd) and HI SSh at z ≈ 6 play a major role in improving the estimation of metal ions and HI statistics at high z. 2020 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57171642011 https://www.redalyc.org/journal/571/57171642011/ https://www.redalyc.org/journal/571/57171642011/html/ https://www.redalyc.org/journal/571/57171642011/57171642011.epub https://www.redalyc.org/journal/571/57171642011/movil 10.22201/ia.01851101p.2020.56.01.11 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.56 |
| format | Artículo científico |
| id | redalyc_57171642011 |
| language | en |
| publishDate | 2020 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Can UVB Variations Reconcile Simulated Quasar Absorption Lines at High Redshift? L. A. García Física, Astronomía y Matemáticas dark ages first stars reionization Cosmology: theory methods: numerical Can UVB Variations Reconcile Simulated Quasar Absorption Lines at High Redshift? L. A. García E. V. Ryan-Weber Física, Astronomía y Matemáticas dark ages first stars reionization Cosmology: theory methods: numerical In this work we present new calculations of the observables associated with synthetic metal and HI absorption lines in the spectra of high redshift quasars, inspired by questions and limitations raised in work with a uniform Haardt-Madau 2012 ultraviolet background (UVB). We introduce variations at z ≈ 6 to the UVB and HI self-shielding and explore the sensitivity of the absorption features to modifications of the hardness of the UVB. We find that observed SiIV and low ionization states (e.g. CII, SiII, OI) are well represented by a soft UV ionizing field at z = 6, but this same prescription, fails to reproduce the statistical properties of the observed CIV ion absorber population. We conclude that small variations in the UVB (not greater than a dex below Haardt-Madau 2012 emissivity at 1 Ryd) and HI SSh at z ≈ 6 play a major role in improving the estimation of metal ions and HI statistics at high z. 2020 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57171642011 https://www.redalyc.org/journal/571/57171642011/ https://www.redalyc.org/journal/571/57171642011/html/ https://www.redalyc.org/journal/571/57171642011/57171642011.epub https://www.redalyc.org/journal/571/57171642011/movil 10.22201/ia.01851101p.2020.56.01.11 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.56 |
| title | Can UVB Variations Reconcile Simulated Quasar Absorption Lines at High Redshift? |
| topic | Física, Astronomía y Matemáticas dark ages first stars reionization Cosmology: theory methods: numerical |
| url | https://www.redalyc.org/articulo.oa?id=57171642011 https://www.redalyc.org/journal/571/57171642011/ https://www.redalyc.org/journal/571/57171642011/html/ https://www.redalyc.org/journal/571/57171642011/57171642011.epub https://www.redalyc.org/journal/571/57171642011/movil |