Research Interests

Particle astrophysics and cosmology, early universe, inflationary cosmology and quantum fluctuations, dark matter and cosmic microwave background

Journal Papers affiliated with ASIAA

1. Cheng S-L; Lee D-S; Ng K-W, "Primordial perturbations from ultra-slow-roll single-field inflation with quantum loop effects" , JCAP: 2024(3), id.008(25 pp), Mar, 2024 [SCI] ( ADS | Fulltext )
2. Bernardo RC; Ng K-W, "Stochastic gravitational wave background phenomenology in a pulsar timing array" , Phys Rev D: 107(4), id.044007, Feb, 2023 [SCI] ( ADS | Fulltext )
3. Bernardo RC; Ng K-W, "Looking out for the Galileon in the nanohertz gravitational wave sky" , Phys Lett B: 841, id.137939, June, 2023 [SCI] ( ADS | Fulltext )
4. Bernardo RC; Ng, K-W, "Constraining gravitational wave propagation using pulsar timing array correlations" , Phys Rev D: 107(10), id.L101502, May, 2023 [SCI] ( ADS | Fulltext )
5. Liu G-C; Ng K-W, "Overlap reduction functions for a polarized stochastic gravitational-wave background in the Einstein Telescope-Cosmic Explorer and the LISA-Taiji networks" , Phys Rev D: 107(10), id.104040, May, 2023 [SCI] ( ADS | Fulltext )
6. Bernardo RC; Ng K-W, "Pulsar and cosmic variances of pulsar timing-array correlation measurements of the stochastic gravitational wave background" , JCAP: 2022 (11), id.46 (24pp.), Nov, 2022 [SCI] ( ADS | Fulltext )
7. Cheng SL; Lee DS; Ng KW, "Power spectrum of primordial perturbations during ultra-slow-roll inflation with back reaction effects" , Phys Lett B: 827, id. 136956, April, 2022 [SCI] ( ADS | Fulltext )
8. Liu G-C; Ng K-W, "Timing-residual power spectrum of a polarized stochastic gravitational-wave background in pulsar-timing-array observation" , Phys Rev D: 106(6), id.064004, Sep, 2022 [SCI] ( ADS | Fulltext )
9. Ng K-W, "Redshift-space fluctuations in stochastic gravitational wave background" , Phys Rev D: 106(4), id.43505, Aug, 2022 [SCI] ( ADS | Fulltext )
10. Chu Y-K; Liu G-C; Ng K-W, "Spherical harmonic analysis of anisotropies in polarized stochastic gravitational-wave background with interferometry experiments" , Phys Rev D: 103(6), id.063528, Mar, 2021 [SCI] ( ADS | Fulltext )
11. Chu Y-K; Liu G-C; Ng K-W, "Observation of a polarized stochastic gravitational-wave background in pulsar-timing-array experiments" , Phys Rev D: 104(12), id.124018, Dec, 2021 [SCI] ( ADS | Fulltext )
12. Ng K-W; Wu Y-P, "Constant-rate inflation: primordial black holes from conformal weight transitions" , Journal of High Energy Physics: 2021 (11), id.76, Nov, 2021 [SCI] ( ADS | Fulltext )
13. Teng Y-P; Lee W; Ng K-W, "Constraining the dark-energy equation of state with cosmological data" , Phys Rev D: 104(8), id.083519 (7pp), Oct, 2021 [SCI] ( ADS | Fulltext )
14. Chang P-W; Chiang C-W; Ng K-W, "Thermal loop effects on large-scale curvature perturbation in the Higgs inflation" , Journal of High Energy Physics: 2020(4), id. 163 (24pp.), Apr, 2020 [SCI] ( ADS | Fulltext )
15. Cho H-T; Ng K-W, "Electromagnetic coupling effects in natural inflation" , Classical and Quantum Gravity: 37(16), id.165011 (22pp.), Aug, 2020 [SCI] ( ADS | Fulltext )
16. Huang WC; Ng KW; Yuan TC, "Circularly polarized gamma rays in effective dark matter theory" , Phys Lett B: 800, id. 135104 (25 pp.), Jan, 2020 [SCI] ( ADS | Fulltext )
17. Syu W-C; Lee D-S; Ng K-W, "Quantum loop effects to the power spectrum of primordial perturbations during ultra slow-roll inflation" , Phys Rev D: 101(2), id.25013 (13pp.), Jan, 2020 [SCI] ( ADS | Fulltext )
18. Cheng S-L; Lee WL; Ng K-W, "Superhorizon curvature perturbation in ultraslow-roll inflation" , Phys Rev D: 99(6), id. 063524 (6 pp.), Mar, 2019 [SCI] ( ADS | Fulltext )
19. Cheung K; Kuo J-L; Ng K-W; et al., "The impact of EDGES 21-cm data on dark matter interactions" , Phys Lett B: 789, 137-144, Feb, 2019 [SCI] ( ADS | Fulltext )
20. Levshakov SA; Ng K-W; Henkel C; ...; Liu S-Y; Wang W-H; et al., "Testing the weak equivalence principle by differential measurements of fundamental constants in the Magellanic Clouds" , MNRAS: 487(4), 5175-5187, Aug, 2019 [SCI] ( ADS | Fulltext )
21. Lin C-M; Ng K-W; Cheung K, "Chaotic inflation on the brane and the swampland criteria" , Phys Rev D: 100(2), id. 023545 (6 pp.), July, 2019 [SCI] ( ADS | Fulltext )
22. Chang CC; Lee W; Ng KW, "Spherical collapse models with clustered dark energy" , Physics of the Dark Universe: 19, 12-20, March, 2018 [SCI] ( ADS | Fulltext )
23. Cheng S-L; Lee W; Ng K-W, "Primordial black holes and associated gravitational waves in axion monodromy inflation" , JCAP: 7, id. 001, July, 2018 [SCI] ( ADS | Fulltext )
24. Huang WC; Ng KW, "Polarized gamma rays from dark matter annihilations" , Phys Lett B: 783, 29-35, Aug, 2018 [SCI] ( ADS | Fulltext )
25. Cheng S-L; Lee W; Ng K-W, "Production of high stellar-mass primordial black holes int rapped inflation" , Journal of High Energy Physics: 2, 008, Feb 1, 2017 [SCI] ( ADS | Fulltext )
26. Levshakov SA; Ng K-W; Henkel C; Mookerjea B, "[C i], [C II] and CO emission lines as a probe for α variations at low and high redshifts" , MNRAS: 471(2), 2143-2150, Oct, 2017 [SCI] ( ADS | Fulltext )
27. Liu G-C; Ng K-W, "Axion dark matter induced cosmic microwave background B modes" , Physics of the Dark Universe: 16, 22-25, June, 2017 [SCI] ( ADS | Fulltext )
28. Cheng SL; Lee W; Ng KW, "Numerical study of pseudoscalar inflation with an axion-gauge field coupling" , Phys Rev D: 93(6), 063510, March, 2016 [SCI] ( ADS | Fulltext )
29. Lee S; Liu GC; Ng KW, "Dark Ultra-Light Scalars and Cosmic Parity Violation" , Universe-Taipei: 4(4), 29-44, Oct-Dec, 2016 ( ADS | Fulltext )
30. Lee S; Liu GC; Ng KW, "Cosmic birefringence fluctuations and cosmic microwave background B-mode polarization" , Phys Lett B: 746, 406-409, Jun 30, 2015 [SCI] ( ADS | Fulltext )
31. Lee S; Liu G-C; Ng K-W, "Imprint of scalar dark energy on cosmic microwave background polarization" , Phys Rev D: 89(6), 063010, March, 2014 [SCI] ( ADS | Fulltext )
32. Liu G-C; Ng K-W; Wang I-C, "Naturally large tensor-to-scalar ratio in inflation" , Phys Rev D: 90(10), 103531, Nov, 2014 [SCI] ( ADS | Fulltext )
33. Lin C-M; Ng K-W, "Primordial black holes from passive density fluctuations" , Phys Lett B: 718(4-5), 1181-1185, Jan, 2013 [SCI] ( ADS | Fulltext )
34. Lee S; Ng KW, "Growth Index with the Cosmological Constant" , Chinese J Phys: 50(3), 367-374, June, 2012 [SCI] ( ADS | Fulltext )
35. Ng KW, "Damping of tensor modes in inflation" , Phys Rev D: 86(10), 103510, Nov 7, 2012 [SCI] ( ADS | Fulltext )
36. Liu GC; Ng KW; Pen UL, "Improved dark energy detection through the polarization-assisted cross correlation of the cosmic microwave background with radio sources" , Phys Rev D: 83(6), 063001, Mar 2, 2011 [SCI] ( ADS | Fulltext )
37. Lee S; Liu GC; Ng KW, "Effects on the two-point correlation function from the coupling of quintessence to dark matter" , Phys Rev D: 81(6), Art. No. 061302, Mar 15, 2010 [SCI] ( ADS | Fulltext )
38. Lee S; Ng KW, "Growth index with the exact analytic solution of sub-horizon scale linear perturbation for dark energy models with constant equation of state" , Phys Lett B: 688(1), 1-3, Apr 26, 2010 [SCI] ( ADS | Fulltext )
39. Lee S; Ng KW, "Properties of the exact analytic solution of the growth factor and its applications" , Phys Rev D: 82(4), Art. No. 043004, Aug 10, 2010 [SCI] ( ADS | Fulltext )
40. Lee S; Ng KW, "Spherical collapse model with non-clustering dark energy" , JCAP: 10, 028, Oct, 2010 [SCI] ( ADS | Fulltext )
41. Ho PTP; Altamirano P; Chang C-H; Chang S-H; Chang S-W; Chen C-C; Chen K-J; Chen M-T; Han C-C; Ho WM; Huang Y-D; Hwang Y-J; Ibañez-Romano F; Jiang H; Koch PM; Kubo DY; Li C-T; Lim J; Lin K-Y; Liu G-C; Lo K-Y; Ma C-J; Martin RN; Martin-Cocher P; Molnar SM; Ng K-W; Nishioka H; O'Connell KE; Oshiro P; Patt F; Raffin P; Umetsu K; Wei T; et al., "The Yuan-Tseh Lee Array for Microwave Background Anisotropy" , ApJ: 694(2), 1610-1618, April 1, 2009 [SCI] ( ADS | Fulltext )
42. Ho PTP; Altimirano P; Birkinshaw M; Chang SW; Chang CH; Chen KJ; Chen M; Chiueh TD; Chiueh T; Chu TH; Han CC; Huang CW; Huang YD; Hwang WYP; Hwang YJ; Jiang H; Kesteven M; Koch P; Kubo D; Lancaster K; Li CT; Liang H; Liao YW; Lim J; Lin YS; Lin KY; Liu GC; Lo KY; Ma CJ; Martin-Cocher P; Martin RN; Molnar S; Ng KW; Nishioka H; Park CG; Patt F; Peterson JB; Raffin P; Romano F; Wang H; Umetsu K; Wang FC; Wu JHP, "The Yuan Tseh Lee AMiBA Project" , MPLA: 23(20), 1243-1251, June, 2008 [SCI] ( ADS | Fulltext )
43. Lee S; Ng KW, "Can strong gravitational lensing constrain dark energy?" , Phys Rev D: 76(4), 043518, Aug, 2007 [SCI] ( ADS | Fulltext )
44. Ng KW, "Some issues in CMB polarization observation" , MPLA: 22(25-28), 1901-1910, Sep 14, 2007 [SCI] ( ADS | Fulltext )
45. Lee S; Liu GC; Ng KW, "Constraints on the coupled quintessence from cosmic microwave background anisotropy and matter power spectrum" , Phys Rev D: 73(8), 083516, Apr, 2006 [SCI] ( ADS | Fulltext )
46. Liu G-C; Lee S; Ng K-W, "Effect on Cosmic Microwave Background Polarization of Coupling of Quintessence to Pseudoscalar Formed from the Electromagnetic Field and its Dual" , Phys Rev Lett: 97(16), 161303, Oct 20, 2006 [SCI] ( ADS | Fulltext )
47. Ng KW, "Full-sky correlation functions for CMB experiments with asymmetric window functions" , Phys Rev D: 71(8), 083009, Apr, 2005 [SCI] ( ADS | Fulltext )
48. Chou C-H; Ng K-W, "Decaying Superheavy Dark Matter and Subgalactic Structure of the Universe" , Phys Lett B: 594(1-2), 1-7, Jul 29, 2004 [SCI] ( ADS | Fulltext )
49. Cortiglioni S; Bernardi G; ...; Ng KW; et al, "The Sky Polarization Observatory (SPOrt)" , New Astron: 9(4), 297-327, May, 2004 [SCI] ( ADS | Fulltext )
50. Ho PTP; Chen M-T; ...; Chiueh T; Chu T-H; Jiang H; Koch P; Kubo D; Li C-T; ...; Lin K-Y; Liu G-C; Lo K-Y; Ma C-J; Martin RN; Ng K-W; Nishioka H; Patt F; ...; Wang H; Hwang Y-J; Umetsu K; et al., "The AMiBA Project" , MPLA: 19(13-16), 993-1000, May 30, 2004 [SCI] ( ADS | Fulltext )
51. Park C-G; Ng K-W, "E/B Separation in Cosmic Microwave Background Interferometry" , ApJ: 609(1), 15-21, Jul 1, 2004 [SCI] ( ADS | Fulltext )
52. Park CG; Ng KW; ...; Liu GC; Umetsu K, "Observational Strategies of Cosmic Microwave Background Temperature and Polarization Interferometry Experiments" , ApJ: 589(1), 67-81, May 20, 2003 [SCI] ( ADS | Fulltext )
53. Ng KW, "Complex visibilities of cosmic microwave background anisotropies" , Phys Rev D: 63(12), 123001, Jun 15, 2001 [SCI] ( ADS | Fulltext )
54. Ng KW, "Tensor-induced CMB temperature-polarization correlation in reionized universes" , Phys Rev D: 60(4), 047302, Aug 15, 1999 [SCI] ( ADS | Fulltext )