22 Result(s)
within
Qing-Guo Huang
English
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Article
Cosmological interpretation for the stochastic signal in pulsar timing arrays
The pulsar timing array (PTA) collaborations have recently reported compelling evidence for a stochastic signal consistent with a gravitational-wave background. In this paper, we combine the latest data sets f...
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Editorial
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Implications for the supermassive black hole binaries from the NANOGrav 15-year data set
Several pulsar timing array (PTA) collaborations, including NANOGrav, EPTA, PPTA, and CPTA, have announced the evidence for a stochastic signal consistent with a stochastic gravitational wave background (SGWB)...
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Primordial black holes generated by the non-minimal spectator field
We improve and generalize the non-minimal curvaton model originally proposed in ar**v: 2112.12680 to a model in which a spectator field non-minimally couples to an inflaton field and the power spectrum of the ...
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Open AccessThe shadow of supertranslated black hole
The supertranslated black hole proposed by Hawking, Perry, and Strominger might provide a resolution to the information paradox, which is usually defined by a complicated space-time metric. In this paper, we f...
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Non-tensorial gravitational wave background in NANOGrav 12.5-year data set
We perform the first search for an isotropic non-tensorial gravitational-wave background (GWB) allowed in general metric theories of gravity in the North American Nanohertz Observatory for Gravitational Waves ...
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Erratum to: Measuring the tilt of primordial gravitational-wave power spectrum from observations
In the original publication of this paper [1], the spell of second author’s name is given incorrectly. The name should be corrected as: Zu-Cheng Chen.
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Measuring H0 from low-z datasets
The Hubble constant H0 represents the expansion rate of the Universe at present and is closely related to the age of the Universe. The accurate measurement of Hubble constant is crucial for modern cosmology. Howe...
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Extraction of gravitational wave signals with optimized convolutional neural network
Gabbard et al. have demonstrated that convolutional neural networks can achieve the sensitivity of matched filtering in the recognization of the gravitational-wave signals with high efficiency [Phys. Rev. Lett. 1...
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Measuring the tilt of primordial gravitational-wave power spectrum from observations
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Inflation model selection revisited
We update the constraints on the power spectra of primordial curvature perturbation and tensor perturbation including Planck data 2015 (P15) and recently released BICEP2/Keck data (BK15), Baryon Acoustic Oscil...
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Open AccessLow-redshift constraints on the Hubble constant from the baryon acoustic oscillation “standard rulers” and the gravitational wave “standard sirens”
The multi-messenger observations of GW170817 indicated a new independent measurement of the Hubble constant ( \(H_0\) ...
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Open AccessMeasuring the spectral running from cosmic microwave background and primordial black holes
We constrain the spectral running by combining cosmic microwave background (CMB) data, baryon acoustic oscillation (BAO) data and the constraint from primordial black holes (PBHs). We find that the constraint ...
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Detecting the neutrinos mass hierarchy from cosmological data
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Open AccessNew cosmological constraints with extended-Baryon Oscillation Spectroscopic Survey DR14 quasar sample
We update the constraints on the cosmological parameters by adopting the Planck data released in 2015 and baryon acoustic oscillation (BAO) measurements including the new DR14 quasar sample measurement at reds...
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Open AccessHow the dark energy can reconcile Planck with local determination of the Hubble constant
We try to reconcile the tension between the local 2.4 % determination of Hubble constant and its global determination by Planck CMB data and BAO data through modeling the dark energy variously. We find that the c...
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Open AccessConstraints on the neutrino mass and mass hierarchy from cosmological observations
Considering the mass splitting between three active neutrinos, we represent the new constraints on the sum of neutrino mass $$\sum m_\...
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Open AccessThe four-point correlation function of graviton during inflation
We expand the Einstein-Hilbert action with a positive cosmological constant up to the fourth order in terms of gravity fluctuations, and then use the in-in formalism to calculate the four-point correlation fun...
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Open AccessConstraints on the cosmological parameters from BICEP2, Planck, and WMAP
In this paper we constrain the cosmological parameters, in particular the tilt of tensor power spectrum, by adopting Background Imaging of Cosmic Extragalactic Polarization (B2), Planck released in 2013 and Wi...
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Open AccessAn analytic calculation of the growth index for \(f(R)\) dark energy model
We derive the analytic formula of the growth index for the \(f(R)\) ...
