Constraining the physics of star formation from CIB-cosmic shear cross-correlations

Abstract

Understanding the physics of star formation is one of the key problems facing modern astrophysics. The Cosmic Infrared Background (CIB), sourced by the emission from all dusty star-forming galaxies since the epoch of reionisation, is a complementary probe to study the star formation history, as well as an important extragalactic foreground for studies of the Cosmic Microwave Background (CMB). Understanding the physics of the CIB is therefore of high importance for both cosmology and galaxy formation studies. In this paper, we make high signal-to-noise measurements of the cross-correlation between maps of the CIB from the Planck experiment, and cosmic shear measurements from the Dark Energy Survey and Kilo-Degree Survey. Cosmic shear, sourced mainly by the weak gravitational lensing of photons emitted by background galaxies, is a direct tracer of the matter distribution, and thus we can use its cross-correlation with the CIB to directly test our understanding of the link between the star formation rate (SFR) density and the matter density. We use our measurements to place constraints on a halo-based model of the SFR that parametrises the efficiency with which gas is transformed into stars as a function of halo mass and redshift. These constraints are enhanced by combining our data with model-independent measurements of the bias-weighted SFR density extracted from the tomographic cross-correlation of galaxies and the CIB. We are able to place constraints on the peak efficiency at low redshifts, $\eta =0.445_{-0.11}^{+0.055}$, and on the halo mass at which this peak efficiency is achieved today ${\log }_{10}(M_1/M_{\odot })=12.17\pm 0.25$. Our constraints are in excellent agreement with direct measurements of the SFR density, as well as other CIB-based studies.

Not too many pages. Comments welcome

References in corpus (18)

• The NumPy array: a structure for efficient numerical computation
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Cosmic Star Formation History
• HI4PI: A full-sky HI survey based on EBHIS and GASS
• The Cosmic Infrared Background Resolved by Spitzer. Contributions of Mid-Infrared Galaxies to the Far-Infrared Background
• Evolution of the dust emission of massive galaxies up to z=4 and constraints on their dominant mode of star formation
• LiteBIRD: JAXA's new strategic L-class mission for all-sky surveys of cosmic microwave background polarization
• Constraints on Cosmological Parameters from the 500 deg${}^2$ SPTpol Lensing Power Spectrum
• The growth of density perturbations in the last $\sim$10 billion years from tomographic large-scale structure data
• Joint constraints on cosmology and the impact of baryon feedback: combining KiDS-1000 lensing with the thermal Sunyaev-Zeldovich effect from Planck and ACT
• Including beyond-linear halo bias in halo models
• Faint Submillimeter Galaxies identified through their optical/near-infrared colours I: spatial clustering and halo masses
• Cross-correlation of cosmic far-infrared background anisotropies with large scale structures
• Dark Energy Survey Year 3 results: Marginalisation over redshift distribution uncertainties using ranking of discrete realisations
• Optimal multifrequency weighting for CMB lensing
• The co-evolution of black hole growth and star formation from a cross-correlation analysis between quasars and the cosmic infrared background
• Cosmic star formation history with tomographic cosmic infrared background-galaxy cross-correlation

Cited by in corpus (4)

• Euclid. I. Overview of the Euclid mission
• A multi-tracer empirically-driven approach to line-intensity mapping lightcones
• Mapping luminous and dark matter in the Universe
• Bayesian inference methodology to characterize the dust emissivity at far-infrared and submillimeter frequencies