A Caltech Library Service

Sunyaev-Zeldovich fluctuations from the first stars?

Oh, S. Peng and Cooray, Asantha and Kamionkowski, Marc (2003) Sunyaev-Zeldovich fluctuations from the first stars? Monthly Notices of the Royal Astronomical Society, 342 (1). L20-L24. ISSN 0035-8711.

[img] PDF - Published Version
See Usage Policy.

[img] PDF - Submitted Version
See Usage Policy.


Use this Persistent URL to link to this item:


WMAP's detection of high electron-scattering optical depth τe suggests substantial star formation at high redshift z∼ 17 ± 5. On the other hand, the recovered σ8∼ 0.84 ± 0.04 argues against a cluster Sunyaev–Zeldovich (SZ) origin for the observed small-scale cosmic microwave background (CMB) fluctuation excess, which generally requires σ8∼ 1.1. Here we consider the effects of high-redshift star formation on the CMB. We derive a fairly model-independent relation between τₑ and the number of ionizing photons emitted per baryon Nᵧ, and use this to calibrate the amount of high-redshift supernova activity. The resulting supernova remnants Compton cool against the CMB creating a Compton y distortion y∼ few × 10⁻⁶ within observational bounds. However they also create small-scale SZ fluctuations, which could be comparable with SZ fluctuations from unresolved galaxy clusters. This raises the exciting possibility that we have already detected signatures of the first stars not just once, but twice, in the CMB.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Cooray, Asantha0000-0002-3892-0190
Kamionkowski, Marc0000-0001-7018-2055
Additional Information:© 2003 RAS. Accepted 2003 April 11. Received 2003 April 16; in original form 2003 March 7. This work was supported by NASA NAG5-9821 and DoE DE-FG03-92-ER40701.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-92-ER40701
Subject Keywords:galaxies: formation, intergalactic medium, cosmic microwave background
Issue or Number:1
Record Number:CaltechAUTHORS:20200610-122805615
Persistent URL:
Official Citation:S. Peng Oh, Asantha Cooray, Marc Kamionkowski, Sunyaev—Zeldovich fluctuations from the first stars?, Monthly Notices of the Royal Astronomical Society, Volume 342, Issue 1, June 2003, Pages L20–L24,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103822
Deposited By: Rebecca Minjarez
Deposited On:23 Jun 2020 19:56
Last Modified:23 Jun 2020 19:56

Repository Staff Only: item control page