REVIEW 21 cited by
The NANOGrav 15-year Data Set: Observations and Timing of 68 Millisecond Pulsars
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
read the original abstract
We present observations and timing analyses of 68 millisecond pulsars (MSPs) comprising the 15-year data set of the North American Nanohertz Observatory for Gravitational Waves (NANOGrav). NANOGrav is a pulsar timing array (PTA) experiment that is sensitive to low-frequency gravitational waves. This is NANOGrav's fifth public data release, including both "narrowband" and "wideband" time-of-arrival (TOA) measurements and corresponding pulsar timing models. We have added 21 MSPs and extended our timing baselines by three years, now spanning nearly 16 years for some of our sources. The data were collected using the Arecibo Observatory, the Green Bank Telescope, and the Very Large Array between frequencies of 327 MHz and 3 GHz, with most sources observed approximately monthly. A number of notable methodological and procedural changes were made compared to our previous data sets. These improve the overall quality of the TOA data set and are part of the transition to new pulsar timing and PTA analysis software packages. For the first time, our data products are accompanied by a full suite of software to reproduce data reduction, analysis, and results. Our timing models include a variety of newly detected astrometric and binary pulsar parameters, including several significant improvements to pulsar mass constraints. We find that the time series of 23 pulsars contain detectable levels of red noise, 10 of which are new measurements. In this data set, we find evidence for a stochastic gravitational-wave background.
Forward citations
Cited by 21 Pith papers
-
Correlated signals of ultralight scalar dark matter in pulsar timing
A finite-spatial-correlation Gaussian-field prior for PTA ULDM signals interpolates between fully correlated and uncorrelated limits and is validated on blinded mock data for linear and quadratic couplings.
-
Observable Gravitational Wave Strain at Second Order
At second order, the gravitational-wave strain measured by geodesic observers exchanging light pulses is the transverse-traceless metric perturbation in the Newton gauge (h_N^(2)).
-
Beyond diagonal approximations: improved covariance modeling for pulsar timing array data analysis
A new FFT-and-interpolation covariance method for pulsar timing arrays avoids the biased parameters produced by the standard diagonal Fourier-space approximation.
-
Binary neutron stars in the next-generation era: Multi-messenger detection prospects and constraints on the equation of state, mass distribution, and cosmology
With ET (and ET+CE), mock multi-messenger BNS catalogues yield ~40–500 EM counterparts per year and, under ideal recovery, constrain R1.4 to ~0.2 km and H0 to ~1 km s−1 Mpc−1.
-
QuickGWecc: Fast Bayesian pipeline for searching eccentric binaries in pulsar timing array data
QuickGWecc extends the fast QuickCW framework to relativistic eccentric binaries, with projection-parameter likelihood updates taking about 41 microseconds.
-
Circularly polarized gravitational waves from parity-violating scalar-tensor theory
In the "Qi-Xiu" parity-violating scalar-tensor theory, the L3 and L4 interactions leave linear gravitational-wave propagation GR-like but still generate circularly polarized scalar-induced gravitational waves.
-
Mapping the Gravitational-wave Background Across the Spectrum with a Next-Generation Anisotropic Per-frequency Optimal Statistic
A new pulsar-timing-array pipeline maps the gravitational-wave sky per frequency, folds cosmic variance into significance estimates, and detects a simulated loud source at p=0.01 versus 0.2 broadband.
-
$\textit{BMAD}$-Circumbinary Magnetically Arrested Disks around Stellar or Black Hole Binaries: Hot Accretion Flows, Disk Properties, and Angular Momentum Transfer
Circumbinary accretion disks can enter a magnetically arrested state, and in weakly cooled or adiabatic regimes the resulting magnetic flux eruptions may drive the binary orbit to shrink.
-
Detecting Intermediate-mass Black Holes Using Miniature Pulsar Timing Arrays in Globular Clusters
A mini pulsar timing array inside a globular cluster could detect intermediate-mass black hole binaries with mass ratios above about 0.1 via microsecond gravitational-wave timing residuals.
-
Likelihoods for Stochastic Gravitational Wave Background Data Analysis
Gaussian likelihood approximations used in stochastic gravitational-wave background searches can bias parameter estimates when the number of data segments is small, and for LISA and pulsar timing arrays the bias can e...
-
Scalar-induced gravitational waves from inflation with symmetry breaking
Late gauge-field excitation in charged symmetry-breaking inflation pushes enhanced SIGWs into the GHz band, where longitudinal and charge-mixing parameters reshape the spectrum in opposite, distinguishable ways.
-
Purely quadratic non-Gaussianity from tachyonic instability: Primordial black holes and scalar-induced gravitational waves
Purely quadratic non-Gaussianity from tachyonic instability allows narrow curvature spectra to exponentially suppress primordial black hole overproduction via correlation coefficient ρ approaching -1 while retaining s...
-
Inflationary phase transitions in the early Universe: A Bayesian study with space-based gravitational-wave detectors
With a Taiji-like detector, inflationary phase-transition gravitational-wave backgrounds are detectable at SNR≳10, but reliable parameter reconstruction needs SNR≳33 and degrades with astrophysical foregrounds.
-
Bayesian analysis of the complex singlet model with phase transition gravitational waves
Bayesian forecasts for the Taiji detector constrain complex singlet model parameters through electroweak phase transition gravitational wave signals.
-
Measuring gravitational wave spectrum from electroweak phase transition and Higgs self-couplings
Using simulated Taiji data, the authors show that a stochastic gravitational-wave signal from an electroweak phase transition in the singlet-extended Standard Model can constrain the Higgs cubic and quartic self-couplings.
-
One-loop corrections to infrared GWs is forbidden by symmetries
In non-attractor single-field inflation, one-loop corrections to superhorizon gravitational waves cancel, and a Ward identity explains why.
-
Directional Anisotropic Sensitivity Curves for Pulsar Timing Arrays
PTA gravitational-wave sensitivity is mapped direction-by-direction, with radiometer and full-Fisher estimators bracketing the usual isotropic curve.
-
Gravitational waves from holographic first-order QCD phase transition with magnetic field
In holographic QCD models, a stronger external magnetic field shifts the gravitational-wave peak from the first-order confinement transition to lower frequencies, with signals potentially visible to IPTA and SKA.
-
Relativistic accretion and burdened primordial black holes
Combining relativistic accretion with memory-burdened evaporation widens the parameter space for primordial black holes as dark matter and changes dark matter and dark radiation emission predictions.
-
The SKAO Pulsar Timing Array
An SKAO PTA with ~174 millisecond pulsars can dominate nanohertz GW sensitivity within four years and enable continuous-wave detections plus anisotropy maps of the gravitational-wave background.
-
The equation of state for neutron stars
A textbook-style review of the neutron-star equation of state covering the models, experimental and observational constraints, and open questions, with no new result claimed or derived.
Discussion (0). Continue with ORCID to comment.