J. F. van der List
A5018239442- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Superconducting and THz Device Technology
- Astrophysics and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Dark Matter and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Scientific Research and Discoveries
- Noncommutative and Quantum Gravity Theories
- Geophysics and Gravity Measurements
- Astrophysics and Star Formation Studies
Princeton University
2017-2024
Deutsches Elektronen-Synchrotron DESY
2011
Abstract We present the first linear polarization measurements from 2015 long-duration balloon flight of Spider , which is an experiment that designed to map cosmic microwave background (CMB) on degree angular scales. The results these include maps and power spectra observations 4.8% sky at 95 150 GHz, along with internal consistency tests data. While polarized CMB anisotropy primordial density perturbations dominant signal in this region sky, Galactic dust emission also detected high...
Abstract Using data from the first flight of Spider and Planck High Frequency Instrument, we probe properties polarized emission interstellar dust in observing region. Component-separation algorithms operating both spatial harmonic domains are applied to their consistency quantify modeling errors associated with assumptions. Analyses diffuse Galactic spanning full region demonstrate (i) a spectral energy distribution that is broadly consistent modified-blackbody (MBB) model index β d = 1.45...
Abstract We present a new upper limit on cosmic microwave background (CMB) circular polarization from the 2015 flight of Spider , balloon-borne telescope designed to search for B -mode linear inflation. Although level in CMB is predicted be very small, experimental limits provide valuable test underlying models. By exploiting nonzero circular-to-linear coupling half-wave plate modulators, data 's Antarctic constraint Stokes V at 95 and 150 GHz range <?CDATA $33\lt {\ell }\lt 307$?> <mml:math...
In this work we describe upgrades to the Spider balloon-borne telescope in preparation for its second flight, currently planned December 2021. The instrument is optimized search a primordial B-mode polarization signature cosmic microwave background at degree angular scales. During first flight 2015, mapped ~10% of sky 95 and 150 GHz. payload Antarctic will incorporate three new 280 GHz receivers alongside refurbished 95- from Spider's flight. discuss design characterization these receivers,...
Abstract Modern cosmic microwave background (CMB) analysis pipelines regularly employ complex time-domain filters, beam models, masking, and other techniques during the production of sky maps their corresponding angular power spectra. However, these processes can generate couplings between multipoles from same spectrum different spectra, in addition to typical attenuation. Within context pseudo- C ℓ based, MASTER -style analyses, net effect filtering is commonly approximated by a...
SPIDER is a balloon-borne instrument designed to map the cosmic microwave background at degree-angular scales in presence of Galactic foregrounds. has mapped large sky area Southern Hemisphere using more than 2000 transition-edge sensors (TESs) during two NASA Long Duration Balloon flights above Antarctic continent. During its first flight January 2015, observed 95 GHz and 150 frequency bands, setting constraints on B-mode signature primordial gravitational waves. Its second 2022-23 season...
Using data from the first flight of SPIDER and Planck HFI, we probe properties polarized emission interstellar dust in observing region. Component separation algorithms operating both spatial harmonic domains are applied to their consistency quantify modeling errors associated with assumptions. Analyses spanning full region demonstrate that i) spectral energy distribution diffuse Galactic is broadly consistent a modified-blackbody (MBB) model index $\beta_\mathrm{d}=1.45\pm0.05$...
Spider is a balloon-borne instrument designed to map the cosmic microwave background at degree-angular scales in presence of Galactic foregrounds. has mapped large sky area Southern Hemisphere using more than 2000 transition-edge sensors (TESs) during two NASA Long Duration Balloon flights above Antarctic continent. During its first flight January 2015, was observed 95- and 150-GHz frequency bands, setting constraints on B-mode signature primordial gravitational waves. Its second 2022–2023...
Abstract We present the XFaster analysis package, a fast, iterative angular power spectrum estimator based on diagonal approximation to quadratic Fisher matrix estimator. It uses Monte Carlo simulations compute noise biases and filter transfer functions is thus hybrid of both methods. In contrast conventional pseudo- C ℓ –based methods, algorithm described here requires minimal number does not require them be precisely representative data estimate accurate covariance matrices for bandpowers....
We present the first linear polarization measurements from 2015 long-duration balloon flight of SPIDER, an experiment designed to map cosmic microwave background (CMB) on degree angular scales. Results these include maps and power spectra observations 4.8% sky at 95 150 GHz, along with results internal consistency tests data. While polarized CMB anisotropy primordial density perturbations is dominant signal in this region sky, Galactic dust emission also detected high significance;...