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We use public data from the South Pole Telescope (SPT) and Atacama Cosmology Telescope (ACT) to measure the radial profiles of the thermal Sunyaev–Zel'dovich (tSZ) effect and dust emission around massive quiescent galaxies at z ≈ 1. Using survey data from the Dark Energy Survey and Wide-Field Infrared Survey Explorer, we selected 387,627 quiescent galaxies within the ACT field, with a mean stellar log 10 (M ⋆ / M ⊙) of 11.40. A subset of 94,452 galaxies, with a mean stellar log 10 (M ⋆ / M ⊙) of 11.36, are also covered by SPT. In 0.′ 5 bins around these galaxies, we detect the tSZ profile at levels up to 11 σ, and dust profile up to 20 σ. Both profiles are extended, and the dust profile slope at large radii is consistent with galaxy clustering. We analyze the thermal energy and dust mass versus stellar mass via integration within R = 2.′ 0 circular apertures and fit them with a forward-modeled power law to correct for our photometric stellar mass uncertainties. At the mean log stellar mass of our Overlap and Wide-Area Samples, respectively, we extract thermal energies from the tSZ of E pk = 6.45 − 1.52 + 1.67 × 10 60 erg and 8.20 − 0.52 + 0.52 × 10 60 erg , most consistent with moderate to high levels of active galactic nucleus feedback acting upon the circumgalactic medium. Dust masses at the mean log stellar mass are M d , pk = 6.23 − 0.67 + 0.67 × 10 8 M ⊙ and 6.76 − 0.56 + 0.56 × 10 8 M ⊙ , respectively, and we find a greater than linear dust-to-stellar mass relation, which indicates that the more-massive galaxies in our study retain more dust. Our work highlights the current capabilities of stacking millimeter data around individual galaxies and their potential for future use. [ABSTRACT FROM AUTHOR]

We use combined South Pole Telescope (SPT)+Planck temperature maps to analyze the circumgalactic medium (CGM) encompassing 138,235 massive, quiescent 0.5 ≤ z ≤ 1.5 galaxies selected from data from the Dark Energy Survey (DES) and Wide-Field Infrared Survey Explorer (WISE). Images centered on these galaxies were cut from the 1.85 arcmin resolution maps with frequency bands at 95, 150, and 220 GHz. The images were stacked, filtered, and fit with a graybody dust model to isolate the thermal Sunyaev–Zel'dovich (tSZ) signal, which is proportional to the total energy contained in the CGM of the galaxies. We separated these M⋆ = 1010.9M⊙–1012M⊙ galaxies into 0.1 dex stellar mass bins, detecting tSZ per bin up to 5.6σ and a total signal-to-noise ratio of 10.1σ. We also detect dust with an overall signal-to-noise ratio of 9.8σ, which overwhelms the tSZ at 150 GHz more than in other lower-redshift studies. We corrected for the 0.16 dex uncertainty in the stellar mass measurements by parameter fitting for an unconvolved power-law energy-mass relation, , with the peak stellar mass distribution of our selected galaxies defined as M⋆,peak = 2.3 × 1011M⊙. This yields an erg and. These are consistent with z ≈ 0 observations and within the limits of moderate models of active galactic nucleus feedback. We also computed the radial profile of our full sample, which is similar to that recently measured at lower-redshift by Schaan et al. [ABSTRACT FROM AUTHOR]