Daniel P. Marrone
A5031587586- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Astrophysical Phenomena and Observations
- Radio Astronomy Observations and Technology
- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Superconducting and THz Device Technology
- Pulsars and Gravitational Waves Research
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
- Astro and Planetary Science
- Spectroscopy and Laser Applications
- Mechanics and Biomechanics Studies
- Particle Accelerators and Free-Electron Lasers
- Scientific Research and Discoveries
- Geophysics and Gravity Measurements
- Advanced Thermodynamic Systems and Engines
- Comics and Graphic Narratives
- History and Developments in Astronomy
- Calibration and Measurement Techniques
- Dark Matter and Cosmic Phenomena
- Atmospheric Ozone and Climate
University of Arizona
2015-2024
Center for Astrophysics Harvard & Smithsonian
2002-2024
Harvard University Press
2006-2024
Film Independent
2023
Arizona State University
2012-2019
Max Planck Society
2015-2019
Astronomy and Space
2012-2019
Max Planck Institute for Astronomy
2019
Max Planck Institute for Radio Astronomy
2016
Boston University
2016
We present a catalog of galaxy clusters selected via their Sunyaev-Zel'dovich (SZ) effect signature from 2500 deg$^2$ South Pole Telescope (SPT) data. This work represents the complete sample detected at high significance in 2500-square-degree SPT-SZ survey, which was completed 2011. A total 677 (409) cluster candidates are identified above signal-to-noise threshold $\xi$ =4.5 (5.0). Ground- and space-based optical near-infrared (NIR) imaging confirms overdensities similarly colored galaxies...
We present multiband photometry of 185 type-Ia supernovae (SNe Ia), with over 11,500 observations. These were acquired between 2001 and 2008 at the F. L. Whipple Observatory Harvard-Smithsonian Center for Astrophysics (CfA). This sample contains largest number homogeneously observed reduced nearby SNe Ia (z ≲ 0.08) published to date. It more than doubles sample, bringing SN cosmology point where systematic uncertainties dominate. Our natural system has a precision ≲0.02 mag in BVRIr'i' ≲0.04...
Approximately 10% of active galactic nuclei exhibit relativistic jets, which are powered by accretion matter onto super massive black holes. While the measured width profiles such jets on large scales agree with theories magnetic collimation, predicted structure disk at jet launch point has not been detected. We report radio interferometry observations 1.3mm wavelength elliptical galaxy M87 that spatially resolve base in this source. The derived size 5.5 +/- 0.4 Schwarzschild radii is...
We report high-angular-resolution measurements of polarized dust emission toward the low-mass protostellar system NGC 1333 IRAS 4A. show that in this observed magnetic field morphology is agreement with standard theoretical models formation Sun-like stars magnetized molecular clouds at scales a few hundred astronomical units; gravity has overcome support, and traces clear hourglass shape. The substantially more important than turbulence evolution system, initial misalignment spin axes may...
We report the results of an 87 square-degree point-source survey centered at R.A. 5h30m, decl. -55 deg. taken with South Pole Telescope (SPT) 1.4 and 2.0 mm wavelengths arc-minute resolution milli-Jansky depth. Based on ratio flux in two bands, we separate detected sources into populations, one consistent synchrotron emission from active galactic nuclei (AGN) thermal dust. present source counts for each population 11 to 640 mJy 4.4 800 mm. The are dominated by synchrotron-dominated across...
Using the Atacama Large Millimeter/submillimeter Array, we have conducted a blind redshift survey in 3 mm atmospheric transmission window for 26 strongly lensed dusty star-forming galaxies (DSFGs) selected with South Pole Telescope. The sources were to S1.4 > 20 mJy and dust-like spectrum and, remove low-z sources, not bright radio (S843 MHz < 6 mJy) or far-infrared counterparts (S100 μm 1 Jy, S60 200 mJy). We robustly detect 44 line features our survey, which identify as redshifted emission...
We present a detection-significance-limited catalog of 21 Sunyaev-Zel'dovich selected galaxy clusters. These clusters, along with 1 unconfirmed candidate, were identified in 178 deg^2 sky surveyed 2008 by the South Pole Telescope to depth 18 uK-arcmin at 150 GHz. Optical imaging from Blanco Cosmology Survey (BCS) and Magellan telescopes provided photometric (and some cases spectroscopic) redshift estimates, redshifts ranging z=0.15 z>1, median z = 0.74. Of confirmed three previously as...
(abridged) We present cosmological constraints obtained from galaxy clusters identified by their Sunyaev-Zel'dovich effect signature in the 2500 square degree South Pole Telescope Sunyaev Zel'dovich survey. consider 377 cluster candidates at z>0.25 with a detection significance greater than five, corresponding to 95% purity threshold for compute on models using measured abundance as function of mass and redshift. include additional multi-wavelength observations, including Chandra X-ray data...
We present a catalog of galaxy cluster candidates, selected through their Sunyaev–Zel'dovich (SZ) effect signature in the first 720 deg2 South Pole Telescope (SPT) survey. This area was mapped with SPT 2008 and 2009 austral winters to depth ∼18 μKCMB-arcmin at 150 GHz; 550 it also ∼44 95 GHz. Based on optical imaging all 224 candidates near-infrared majority we have found and/or infrared counterparts for 158, which then classify as confirmed clusters. Of these 158 clusters, 135 were...
We use measurements from the South Pole Telescope (SPT) Sunyaev Zel'dovich (SZ) cluster survey in combination with X-ray to constrain cosmological parameters. present a statistical method that fits for scaling relations of SZ and observables mass while jointly fitting cosmology. The is generalizable multiple observables, self-consistently accounts effects selection uncertainties calibration on derived constraints. apply this data set consisting an SZ-selected catalog 18 galaxy clusters at z...
We present λ1.3 mm CARMA observations of dust polarization toward 30 star-forming cores and 8 regions from the TADPOL survey. show maps all sources, compare ~2.5" resolution with ~20" single-dish submillimeter telescopes. Here we do not attempt to interpret detailed B-field morphology each object. Rather, use average orientations derive conclusions in a statistical sense ensemble bearing mind that these can be quite uncertain. discuss three main findings: (1) A subset sources have consistent...
The South Pole Telescope has discovered one hundred gravitationally lensed, high-redshift, dusty, star-forming galaxies (DSFGs). We present 0.5" resolution 870um Atacama Large Millimeter/submillimeter Array imaging of a sample 47 DSFGs spanning z=1.9-5.7, and construct gravitational lens models these sources. Our visibility-based modeling incorporates several sources residual interferometric calibration uncertainty, allowing us to properly account for noise in the observations. At least 70%...
Magnetic fields near the event horizon Astronomers have long sought to examine a black hole's horizon—the boundary around hole within which nothing can escape. Johnson et al. used sophisticated interferometry techniques combine data from millimeter-wavelength telescopes world. They measured polarization just outside of Sgr A*, supermassive at center our galaxy, Milky Way. The is signature ordered magnetic generated in accretion disk hole. results help explain how holes accrete gas and launch...
ABSTRACT We study the abundance of substructure in matter density near galaxies using ALMA Science Verification observations strong lensing system SDP.81. present a method to measure subhalos around interferometric gravitational lenses. Using simulated we explore effects various systematics, including antenna phase errors and source priors, show how such may be measured or marginalized. apply our formalism find evidence for presence M = 10 8.96±0.12 ⊙ subhalo one images, with significance...
We propose a new test of strong-field general relativity (GR) based on the universal interferometric signature black hole photon ring. The ring is narrow ring-shaped feature, predicted by GR but not yet observed, that appears images sources near hole. It caused extreme bending light within few Schwarzschild radii event horizon and provides direct probe unstable bound orbits Kerr geometry. show precise shape observable remarkably insensitive to astronomical source profile can therefore be...
The Event Horizon Telescope (EHT) observed the compact radio source, Sagittarius A* (Sgr A*), in Galactic Center on 2017 April 5-11 1.3 millimeter wavelength band. At same time, interferometric array data from Atacama Large Millimeter/submillimeter Array and Submillimeter were collected, providing Sgr light curves simultaneous with EHT observations. These sets, complementing very-long-baseline interferometry, are characterized by a cadence signal-to-noise ratio previously unattainable for at...
We present the Black Hole Explorer (BHEX), a mission that will produce sharpest images in history of astronomy by extending submillimeter Very-Long-Baseline Interferometry (VLBI) to space. BHEX discover and measure bright narrow "photon ring" is predicted exist black holes, produced from light has orbited hole before escaping. This discovery expose universal features hole's spacetime are distinct complex astrophysics emitting plasma, allowing first direct measurements supermassive spin. In...
The millimeter/submillimeter wavelength polarization of Sgr A* is known to be variable in both magnitude and position angle on timescales down a few hours. unstable has prevented measurements made at different frequencies epochs from yielding convincing Faraday rotation this source. Here we present observations with the Submillimeter Array polarimeter 227 343 GHz sufficient sensitivity determine measure each band without comparing angles measured separate epochs. We find 10-epoch mean (-5.6...
The South Pole Telescope (SPT) is currently surveying 2500 deg^2 of the southern sky to detect massive galaxy clusters out epoch their formation using Sunyaev-Zel'dovich (SZ) effect. This paper presents a catalog 26 most significant SZ cluster detections in full survey region. includes 14 which have been previously identified and 12 that are new discoveries. These were fields observed two differing noise depths: 1500 at final SPT depth 18 uK-arcmin 150 GHz, 1000 54 uK-arcmin. Clusters...
Energetic flares are observed in the Galactic supermassive black hole Sagittarius A* from radio to X-ray wavelengths. On a few occasions, simultaneous have been detected IR and observations, but clear counterparts at longer wavelengths not seen. We present flare over several hours on 2006 July 17 with Chandra X-Ray Observatory, Keck II telescope, Caltech Submillimeter Array. All telescopes strong events, submillimeter peak is found occur nearly 100 minutes after peak. polarization data show...
Using the Submillimeter Array, we have made first high angular resolution measurements of linear polarization Sagittarius A* at submillimeter wavelengths, and detection intra-day variability in its polarization. We detected 340 GHz (880um) several epochs. At typical 1.4"x2.2", expected contamination from surrounding (partially polarized) dust emission is negligible. found that both fraction position angle are variable, with dropping 8.5% to 2.3% over three days. This significant measurement...