Zobrazeno 1 - 10
of 333
pro vyhledávání: '"Zong Hong Zhu"'
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 105 (2024)
We derive the initial spin period distribution of neutron stars by studying the population of young pulsars associated with supernova remnants. Our hierarchical Bayesian approach accounts for the measurement uncertainties of individual observations a
Externí odkaz:
https://doaj.org/article/7ece7046fd5a45f0927a9e0180355694
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 11 (2024)
Cosmological observations, e.g., cosmic microwave background, have precisely measured the spectrum of primordial curvature perturbation on larger scales, but smaller scales are still poorly constrained. Since primordial black holes (PBHs) could form
Externí odkaz:
https://doaj.org/article/df8aed9278924be8b022bdf2718d6500
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 7, Pp 1-16 (2022)
Abstract In this paper, we use the latest observations of quasars covering the redshift range of $$0.04
Externí odkaz:
https://doaj.org/article/032693c1b66d4d49b0307f08bd15bb23
Publikováno v:
Physics Letters B, Vol 838, Iss , Pp 137720- (2023)
Primordial black holes (PBHs) can be both candidates of dark matter and progenitors of binary black holes (BBHs) detected by the LIGO-Virgo-KAGRA collaboration. Since PBHs could form in the very early Universe through the gravitational collapse of pr
Externí odkaz:
https://doaj.org/article/75221aafe44d45e591f11423a59099f9
Autor:
Shaoqi Hou, Zong-Hong Zhu
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 1, Pp 1-29 (2021)
Abstract The relation between gravitational memory effects and Bondi-Metzner-Sachs symmetries of the asymptotically flat spacetimes is studied in the scalar-tensor theory. For this purpose, the solutions to the equations of motion near the future nul
Externí odkaz:
https://doaj.org/article/9ab01da3e179442f9c2a734725f1278d
Publikováno v:
The Astrophysical Journal, Vol 957, Iss 1, p 56 (2023)
Classification is an essential method and has been developed widely in astronomy. However, planets still lack a universal classification framework, because the solar system planet sample is too small for statistical analysis. Fortunately, exoplanets
Externí odkaz:
https://doaj.org/article/cc8446bc17c24f6fb3e8e51fe5591b4d
Autor:
Philip E. Rosen, Dan Zhang, Jonathan H. Jiang, Leopold Van Ijzendoorn, Kristen A. Fahy, Zong-Hong Zhu
Publikováno v:
Galaxies, Vol 10, Iss 4, p 88 (2022)
Deep space exploration offers the most profound opportunity for the expansion of humanity and our understanding of the universe but remains extremely challenging. Progress will continue to be paced by uncrewed missions followed up by crewed missions
Externí odkaz:
https://doaj.org/article/e9131ca78f2546449b3a33259871d83e
Autor:
Xiaogang Zheng, Jing-Zhao Qi, Shuo Cao, Tonghua Liu, Marek Biesiada, Sylwia Miernik, Zong-Hong Zhu
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 7, Pp 1-8 (2019)
Abstract The gas depletion factor $$\gamma (z)$$ γ(z) , i.e., the average ratio of the gas mass fraction to the cosmic mean baryon fraction of galaxy clusters, plays a very important role in the cosmological application of the gas mass fraction meas
Externí odkaz:
https://doaj.org/article/b08bd96b444040f59055ef97026edc8c
Autor:
Jonathan H. Jiang, Fuyang Feng, Philip E. Rosen, Kristen A. Fahy, Prithwis Das, Piotr Obacz, Antong Zhang, Zong-Hong Zhu
Publikováno v:
Galaxies, Vol 10, Iss 3, p 68 (2022)
The level of technological development of any civilization can be gauged in large part by the amount of energy it produces for its use, but also encompasses that civilization’s stewardship of its home world. Following the Kardashev definition, a Ty
Externí odkaz:
https://doaj.org/article/dbba91df9a9d455ebcd478e2ae3edb69
Autor:
Jonathan H. Jiang, Hanjie Li, Matthew Chong, Qitian Jin, Philip E. Rosen, Xiaoming Jiang, Kristen A. Fahy, Stuart F. Taylor, Zhihui Kong, Jamilah Hah, Zong-Hong Zhu
Publikováno v:
Galaxies, Vol 10, Iss 2, p 55 (2022)
An updated, binary-coded message has been developed for transmission to extraterrestrial intelligences in the Milky Way galaxy. The proposed message includes basic mathematical and physical concepts to establish a universal means of communication fol
Externí odkaz:
https://doaj.org/article/e2905283d16543e294086c67fcb6c87a