Emily Biermann
A5068935436- Radio Astronomy Observations and Technology
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Atmospheric Ozone and Climate
- History and Developments in Astronomy
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Astronomical Observations and Instrumentation
- Cosmology and Gravitation Theories
University of Pittsburgh
2023-2024
We present cosmological constraints from a gravitational lensing mass map covering 9400 sq. deg. reconstructed CMB measurements made by the Atacama Cosmology Telescope (ACT) 2017 to 2021. In combination with BAO (from SDSS and 6dF), we obtain amplitude of matter fluctuations $\sigma_8 = 0.819 \pm 0.015$ at 1.8% precision, $S_8\equiv\sigma_8({\Omega_{\rm m}}/0.3)^{0.5}=0.840\pm0.028$ Hubble constant $H_0= (68.3 1.1)\, \text{km}\,\text{s}^{-1}\,\text{Mpc}^{-1}$ 1.6% precision. A joint...
We present new measurements of cosmic microwave background (CMB) lensing over $9400$ sq. deg. the sky. These are derived from Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) CMB dataset, which consists five seasons ACT temperature and polarization observations. determine amplitude power spectrum at $2.3\%$ precision ($43\sigma$ significance) using a novel pipeline that minimizes sensitivity to foregrounds noise properties. To ensure our results robust, we analyze an extensive set null...
Observations of the millimeter sky contain valuable information on a number signals, including blackbody cosmic microwave background (CMB), Galactic emissions, and Compton-y distortion due to thermal Sunyaev-Zel'dovich (tSZ) effect. Extracting new insight into cosmological astrophysical questions often requires combining multiwavelength observations spectrally isolate one component. In this work, we present arc-minute-resolution map, which traces out line-of-sight-integrated electron...
Abstract We present fluxes and light curves for a population of asteroids at millimeter wavelengths, detected by the Atacama Cosmology Telescope (ACT) over 18,000 deg 2 sky using data from 2017 to 2021. utilize high cadence maps, which can be used in searching moving objects such as trans-Neptunian Objects, well studying transients. detect 170 with signal-to-noise least 5 one ACT observing bands, are centered near 90, 150, 220 GHz. For each asteroid, we compare measured flux predicted...
Abstract We conduct a systematic search for transients in 3 yr of data (2017–2019) from the Atacama Cosmology Telescope (ACT). ACT covers 40% sky at three bands spanning 77–277 GHz. Analysis day mean-subtracted maps, which were match filtered point sources, yielded 29 transient detections. Eight these are due to known asteroids, and others previously published. Four events occur areas with poor noise models thus we cannot be confident they real transients. left 14 new occurring 11 unique...
We present fluxes and light curves for a population of asteroids at millimeter (mm) wavelengths, detected by the Atacama Cosmology Telescope (ACT) over 18, 000 deg2 sky using data from 2017 to 2021. utilize high cadence maps, which can be used in searching moving objects such as trans-Neptunian Objects (TNOs), well studying transients. detect 160 with signal-to-noise least 5 one ACT observing bands, are centered near 90, 150, 220 GHz. For each asteroid, we compare measured flux predicted...
Observations of the millimeter sky contain valuable information on a number signals, including blackbody cosmic microwave background (CMB), Galactic emissions, and Compton-$y$ distortion due to thermal Sunyaev-Zel'dovich (tSZ) effect. Extracting new insight into cosmological astrophysical questions often requires combining multi-wavelength observations spectrally isolate one component. In this work, we present arcminute-resolution map, which traces out line-of-sight-integrated electron...
We conduct a systematic search for astrophysical transients using data from the Atacama Cosmology Telescope (ACT). The were taken 2017 to 2022 in three frequency bands spanning 77 GHz 277 GHz. In this paper we present pipeline transient detection single observation maps where each pixel of map contains one with an integration time approximately four minutes. find 34 events at 27 unique locations. All but two are associated Galactic stars and exhibit wide range properties. also detect event...
We conduct a systematic search for transients in three years of data (2017-2019) from the Atacama Cosmology Telescope (ACT). ACT covers 40 percent sky at bands spanning 77 GHz to 277 GHz. Analysis 3-day mean-subtracted maps, which were match-filtered point sources, yielded 29 detections. Eight these are due known asteroids, and others previously published. Four events occur areas with poor noise models thus we cannot be confident they real transients. left 14 new transient occurring 11...