CaltechAUTHORS
  A Caltech Library Service

Probing the high-redshift universe with SPICA: Toward the epoch of reionisation and beyond

Egami, E. and Armus, L. (2018) Probing the high-redshift universe with SPICA: Toward the epoch of reionisation and beyond. Publications of the Astronomical Society of Australia, 35 . Art. No. e048. ISSN 1323-3580. http://resolver.caltech.edu/CaltechAUTHORS:20190110-072549986

[img] PDF - Published Version
See Usage Policy.

1384Kb
[img] PDF - Accepted Version
See Usage Policy.

2341Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20190110-072549986

Abstract

With the recent discovery of a dozen dusty star-forming galaxies and around 30 quasars at z > 5 that are hyper-luminous in the infrared (μ L_(IR) > 10^(13) L⊙, where μ is a lensing magnification factor), the possibility has opened up for SPICA, the proposed ESA M5 mid-/far-infrared mission, to extend its spectroscopic studies toward the epoch of reionisation and beyond. In this paper, we examine the feasibility and scientific potential of such observations with SPICA’s far-infrared spectrometer SAFARI, which will probe a spectral range (35–230 μm) that will be unexplored by ALMA and JWST. Our simulations show that SAFARI is capable of delivering good-quality spectra for hyper-luminous infrared galaxies at z = 5 − 10, allowing us to sample spectral features in the rest-frame mid-infrared and to investigate a host of key scientific issues, such as the relative importance of star formation versus AGN, the hardness of the radiation field, the level of chemical enrichment, and the properties of the molecular gas. From a broader perspective, SAFARI offers the potential to open up a new frontier in the study of the early Universe, providing access to uniquely powerful spectral features for probing first-generation objects, such as the key cooling lines of low-metallicity or metal-free forming galaxies (fine-structure and H2 lines) and emission features of solid compounds freshly synthesised by Population III supernovae. Ultimately, SAFARI’s ability to explore the high-redshift Universe will be determined by the availability of sufficiently bright targets (whether intrinsically luminous or gravitationally lensed). With its launch expected around 2030, SPICA is ideally positioned to take full advantage of upcoming wide-field surveys such as LSST, SKA, Euclid, and WFIRST, which are likely to provide extraordinary targets for SAFARI.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1017/pasa.2018.41DOIArticle
https://arxiv.org/abs/1809.07710arXivDiscussion Paper
Additional Information:© 2018 Astronomical Society of Australia. Published online: 26 December 2018. This paper is dedicated to the memory of Bruce Swinyard, who initiated the SPICA project in Europe, but unfortunately passed away on 2015 May 22 at the age of 52. He was ISO-LWS calibration scientist, Herschel-SPIRE instrument scientist, first European PI of SPICA, and first design lead of SAFARI. E. E. would like to thank Scuola Normale Superiore (Pisa, Italy) for hosting his visit to discuss this work, and Justin Spilker for providing information on some of the z >5 SPT galaxies. He would also like to thank Leon Koopmans, Jianwei Lyu, and Fengwu Sun for helpful discussions. L. V. acknowledges funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 746119. F. N. acknowledges financial support through Spanish grants ESP2015-65597-C4-1-R and ESP2017-86582-C4-1-R (MINECO/FEDER), and PGP-G acknowledges support from the Spanish Government grant AYA2015-63650-P. The research leading to these results has received funding from the European Research Council under the European Union Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement no. 306476.
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
Marie Curie Fellowship746119
Ministerio de Economía, Industria y Competitividad (MINECO)ESP2015-65597-C4-1-R
Ministerio de Economía, Industria y Competitividad (MINECO)ESP2017-86582-C4-1-R
Ministerio de Economía, Industria y Competitividad (MINECO)AYA2015-63650-P
European Research Council (ERC)306476
Subject Keywords:dark ages, reionisation, first stars; galaxies: evolution; galaxies: formation; galaxies: high redshift; infrared: galaxies; submillimetre: galaxies;
Record Number:CaltechAUTHORS:20190110-072549986
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20190110-072549986
Official Citation:Egami, E., Gallerani, S., Schneider, R., Pallottini, A., Vallini, L., Sobacchi, E., . . . Yajima, H. (2018). Probing the high-redshift universe with SPICA: Toward the epoch of reionisation and beyond. Publications of the Astronomical Society of Australia, 35, E048. doi:10.1017/pasa.2018.41
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92187
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:10 Jan 2019 20:38
Last Modified:10 Jan 2019 20:38

Repository Staff Only: item control page