Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Cheng, Sihao"'
Publikováno v:
Nature 627, 286-288 (2024)
White dwarfs are stellar remnants devoid of a nuclear energy source, gradually cooling over billions of years and eventually freezing into a solid state from the inside out. Recently, it was discovered that a population of freezing white dwarfs maint
Externí odkaz:
http://arxiv.org/abs/2409.04419
Autor:
Novaes, Camila P., Thiele, Leander, Armijo, Joaquin, Cheng, Sihao, Cowell, Jessica A., Marques, Gabriela A., Ferreira, Elisa G. M., Shirasaki, Masato, Osato, Ken, Liu, Jia
We present cosmological constraints from weak lensing with the Subaru Hyper Suprime-Cam (HSC) first-year (Y1) data, using a simulation-based inference (SBI) method. % We explore the performance of a set of higher-order statistics (HOS) including the
Externí odkaz:
http://arxiv.org/abs/2409.01301
It has been suggested that giant planet occurrence peaks for stars with $M_{\ast}~\approx~3~M_{\odot}$ at a value a factor of four higher than observed for solar-mass stars. This population of giant planets predicted to frequently orbit main sequence
Externí odkaz:
http://arxiv.org/abs/2408.03985
Autor:
Liu, Genghao, Tang, Baitian, Ren, Liangliang, Li, Chengyuan, Cheng, Sihao, Zong, Weikai, Fu, Jianning, Ma, Bo, Xu, Cheng, Hu, Yiming
Publikováno v:
A&A 690, A29 (2024)
Close white dwarf binaries (CWDBs) are considered to be progenitors of several exotic astronomical phenomena (e.g., type Ia supernovae, cataclysmic variables). These violent events are broadly used in studies of general relativity and cosmology. Howe
Externí odkaz:
http://arxiv.org/abs/2408.03038
Autor:
Cheng, Sihao, Marques, Gabriela A., Grandón, Daniela, Thiele, Leander, Shirasaki, Masato, Ménard, Brice, Liu, Jia
As weak lensing surveys go deeper, there is an increasing need for reliable characterization of non-Gaussian structures at small angular scales. Here we present the first cosmological constraints with weak lensing scattering transform, a statistical
Externí odkaz:
http://arxiv.org/abs/2404.16085
Autor:
Grandón, Daniela, Marques, Gabriela A., Thiele, Leander, Cheng, Sihao, Shirasaki, Masato, Liu, Jia
Baryonic feedback is a major systematic in weak lensing cosmology. Its most studied effect is the suppression of the lensing power spectrum, a second-order statistic, on small scales. Motivated by the growing interest in statistics beyond the second
Externí odkaz:
http://arxiv.org/abs/2403.03807
Autor:
Marques, Gabriela A., Liu, Jia, Shirasaki, Masato, Thiele, Leander, Grandón, Daniela, Huffenberger, Kevin M., Cheng, Sihao, Harnois-Déraps, Joachim, Osato, Ken, Coulton, William R.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 528, Issue 3, 2024, pp. 4513-4527
We present cosmological constraints derived from peak counts, minimum counts, and the angular power spectrum of the Subaru Hyper Suprime-Cam first-year (HSC Y1) weak lensing shear catalog. Weak lensing peak and minimum counts contain non-Gaussian inf
Externí odkaz:
http://arxiv.org/abs/2308.10866
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 528, Issue 3, 2024, pp. 4272-4288
We infer the dynamical masses of stars across the Hertzsprung-Russell (H-R) diagram using wide binaries from the Gaia survey. Gaia's high-precision astrometry measures the wide binaries' orbital motion, which contains the mass information. Using wide
Externí odkaz:
http://arxiv.org/abs/2308.08584
Publikováno v:
PNAS Nexus, Volume 3, Issue 4, April 2024, pgae103
Physicists routinely need probabilistic models for a number of tasks such as parameter inference or the generation of new realizations of a field. Establishing such models for highly non-Gaussian fields is a challenge, especially when the number of s
Externí odkaz:
http://arxiv.org/abs/2306.17210
Autor:
Ren, Liangliang, Li, Chengyuan, Ma, Bo, Cheng, Sihao, Huang, Shun-Jia, Tang, Baitian, Hu, Yi-ming
Publikováno v:
The Astrophysical Journal Supplement Series,2023, Volume 264, Issue 2, id.39, 35 pp
Galactic short-period close white dwarf binaries (CWDBs) are important objects for space-borne gravitational-wave (GW) detectors in the millihertz frequency bands. Due to the intrinsically low luminosity, only about 25 identified CWDBs are detectable
Externí odkaz:
http://arxiv.org/abs/2302.02802