Skip to main content Accessibility help
×
Home
Hostname: page-component-5c569c448b-nqqt6 Total loading time: 0.307 Render date: 2022-07-06T02:38:30.640Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "useRatesEcommerce": false, "useNewApi": true } hasContentIssue true

New constraints on Lyman-α opacity using 92 quasar lines of sight

Published online by Cambridge University Press:  08 May 2018

Sarah E. I. Bosman
Affiliation:
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, U.K. Kavli Institute for Cosmology, University of Cambridge, Madingley Road, Cambridge CB3 0HA, U.K.
Xiaohui Fan
Affiliation:
Steward Observatory, University of Arizona, Tucson, AZ 85721-0065, USA Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China
Linhua Jiang
Affiliation:
Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China
Sophie Reed
Affiliation:
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, U.K.
Yoshiki Matsuoka
Affiliation:
National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan
George Becker
Affiliation:
Department of Physics & Astronomy, University of California, Riverside, 900 University Avenue, Riverside, CA, 92521, USA
Alberto Rorai
Affiliation:
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, U.K. Kavli Institute for Cosmology, University of Cambridge, Madingley Road, Cambridge CB3 0HA, U.K.
Rights & Permissions[Opens in a new window]

Abstract

HTML view is not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The large scatter in Lyman-α opacity at z > 5.3 has been an ongoing mystery, prompting a flurry of numerical models. A uniform ultra-violet background has been ruled out at those redshifts, but it is unclear whether any proposed models produce sufficient inhomogeneities. In this paper we provide an update on the measurement which first highlighted the issue: Lyman-α effective optical depth along high-z quasar lines of sight. We nearly triple on the previous sample size in such a study thanks to the cooperation of the DES-VHS, SHELLQs, and SDSS collaborations as well as new reductions and spectra. We find that a uniform UVB model is ruled out at 5.1 < z < 5.3, as well as higher redshifts, which is perplexing. We provide the first such measurements at z ∼ 6. None of the numerical models we confronted to this data could reproduce the observed scatter.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2018 

References

Becker, G. D., Bolton, J. S., Madau, P., et al. 2015, MNRAS, 447, 3402CrossRefGoogle Scholar
Bolton, & Haehnelt, 2007, MNRAS, 382, 325CrossRefGoogle Scholar
Bolton, J. S., Puchwein, E., Sijacki, D., et al. 2017, MNRAS, 464, 897Google Scholar
Bosman, S. E. I. & Becker, G. D., 2015, MNRAS, 452, 1105CrossRefGoogle Scholar
Bosman, S. E. I., Becker, G. D., Haehnelt, M. G., et al. 2017, MNRAS, 470, 1919Google Scholar
Chardin, J., Haehnelt, M. G., Aubert, D., & Puchwein, E., 2015, MNRAS, 453, 2943CrossRefGoogle Scholar
Chardin, J., Haehnelt, M. G., Bosman, S. E. I. & Puchwein, E. 2017, arXiv:1707.03841Google Scholar
D'Aloisio, A., McQuinn, M., & Trac, H., 2015, ApJL, 813, L38CrossRefGoogle Scholar
Davies, F. B. & Furlanetto, S. R., 2016, MNRAS, 460, 1328Google Scholar
Davies, F. B., Becker, G. D. & Furlanetto, S. R. 2017, arXiv:1708.08927Google Scholar
Eilers, A.-C., Davies, F. B., Hennawi, J. F., et al. 2017, APJ, 840, 24Google Scholar
Fan, X., Narayanan, V. K., Lupton, R. H., et al. 2001, AJ, 122, 2833CrossRefGoogle Scholar
Fan, X., Strauss, M. A., Becker, R. H., et al. 2006, AJ, 132, 117CrossRefGoogle Scholar
Greig, B., Mesinger, A., Haiman, Z., & Simcoe, R. A., 2017, MNRAS, 466, 4239Google Scholar
Keating, L. C., Puchwein, E., Haehnelt, M. G., Bird, S., & Bolton, J. S., 2016, MNRAS, 461, 606Google Scholar
Keating, L. C., Puchwein, E. & Haehnelt, M. G. 2017, arXiv:1709.05351Google Scholar
Lidz, A., Oh, S. P., & Furlanetto, S. R., 2006, ApJL, 639, L47CrossRefGoogle Scholar
McGreer, I. D., Mesinger, A., & D’Odorico, V., 2015, MNRAS, 447, 499CrossRefGoogle Scholar
Mortlock, D. J., Warren, S. J., Venemans, B. P., et al. 2011, Nature, 474, 616CrossRefGoogle Scholar
Simcoe, R. A., Cooksey, K. L., Matejek, M., et al. 2011, APJ, 743, 21CrossRefGoogle Scholar
You have Access

Save article to Kindle

To save this article to your Kindle, first ensure coreplatform@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

New constraints on Lyman-α opacity using 92 quasar lines of sight
Available formats
×

Save article to Dropbox

To save this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Dropbox account. Find out more about saving content to Dropbox.

New constraints on Lyman-α opacity using 92 quasar lines of sight
Available formats
×

Save article to Google Drive

To save this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Google Drive account. Find out more about saving content to Google Drive.

New constraints on Lyman-α opacity using 92 quasar lines of sight
Available formats
×
×

Reply to: Submit a response

Please enter your response.

Your details

Please enter a valid email address.

Conflicting interests

Do you have any conflicting interests? *