分类： 天文学 >> 天文学 提交时间： 2023-02-19
Masha Baryakhtar
Regina Caputo
Djuna Croon
Kerstin Perez
Emanuele Berti
Joseph Bramante
Malte Buschmann
Richard Brito
Thomas Y. Chen
Philippa S. Cole
Adam Coogan
William E. East
Joshua W. Foster
Marios Galanis
Maurizio Giannotti
Bradley J. Kavanagh
Ranjan Laha
Rebecca K. Leane
Benjamin V. Lehmann
Gustavo Marques-Tavares
摘要： Exploring dark matter via observations of extreme astrophysical environments -- defined here as heavy compact objects such as white dwarfs, neutron stars, and black holes, as well as supernovae and compact object merger events -- has been a major field of growth since the last Snowmass process. Theoretical work has highlighted the utility of current and near-future observatories to constrain novel dark matter parameter space across the full mass range. This includes gravitational wave instruments and observatories spanning the electromagnetic spectrum, from radio to gamma-rays. While recent searches already provide leading sensitivity to various dark matter models, this work also highlights the need for theoretical astrophysics research to better constrain the properties of these extreme astrophysical systems. The unique potential of these search signatures to probe dark matter adds motivation to proposed next-generation astronomical and gravitational wave instruments.
分类： 天文学 >> 天文学 提交时间： 2023-02-19
Ken K. Y. Ng
Boris Goncharov
Shiqi Chen
Ssohrab Borhanian
Ulyana Dupletsa
Gabriele Franciolini
Marica Branchesi
Jan Harms
Michele Maggiore
Antonio Riotto
B. S. Sathyaprakash
Salvatore Vitale
摘要： Primordial black holes (PBHs) may form from the collapse of matter overdensities shortly after the Big Bang. One may identify their existence by observing gravitational wave (GW) emissions from merging PBH binaries at high redshifts $z\gtrsim 30$, where astrophysical binary black holes (BBHs) are unlikely to merge. The next-generation ground-based GW detectors, Cosmic Explorer and Einstein Telescope, will be able to observe BBHs with total masses of $\mathcal{O}(10-100)~M_{\odot}$ at such redshifts. This paper serves as a companion paper of arXiv:2108.07276, focusing on the effect of higher-order modes (HoMs) in the waveform modeling, which may be detectable for these high redshift BBHs, on the estimation of source parameters. We perform Bayesian parameter estimation to obtain the measurement uncertainties with and without HoM modeling in the waveform for sources with different total masses, mass ratios, orbital inclinations and redshifts observed by a network of next-generation GW detectors. We show that including HoMs in the waveform model reduces the uncertainties of redshifts and masses by up to a factor of two, depending on the exact source parameters. We then discuss the implications for identifying PBHs with the improved single-event measurements, and expand the investigation of the model dependence of the relative abundance between the BBH mergers originating from the first stars and the primordial BBH mergers as shown in arXiv:2108.07276.
点击量
待评议
点击量
下载量
评论
