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Upgrades to existing gravitational-wave observatories have the potential to simultaneously constrain the nuclear equation of state and Hubble's constant $H_0$ to percent level with merging neutron star binaries. In practice, performing…

General Relativity and Quantum Cosmology · Physics 2024-10-11 Spencer J. Magnall , Simon R. Goode , Nikhil Sarin , Paul D. Lasky

Simultaneous measurements of distance and redshift can be used to constrain the expansion history of the universe and associated cosmological parameters. Merging binary black hole (BBH) systems are standard sirens---their gravitational…

Cosmology and Nongalactic Astrophysics · Physics 2019-10-02 Will M. Farr , Maya Fishbach , Jiani Ye , Daniel Holz

Gravitational wave (GW) signals from compact binary coalescences can be used as standard sirens to constrain cosmological parameters if their redshift can be measured independently. However, mergers of stellar binary black holes (BBHs) may…

Cosmology and Nongalactic Astrophysics · Physics 2022-02-01 Ju Chen , Changshuo Yan , Youjun Lu , Yuetong Zhao , Junqiang Ge

The postmerger gravitational-wave (GW) signal of a binary neutron star (BNS) merger is expected to contain valuable information that could shed light on the equation of state (EOS) of NSs, the properties of the matter produced during the…

High Energy Astrophysical Phenomena · Physics 2022-05-04 Aditya Vijaykumar , Shasvath J. Kapadia , Parameswaran Ajith

Advanced LIGO and Virgo have so far detected gravitational waves from 10 binary black hole mergers (BBH) and 1 binary neutron star merger (BNS). In the future, we expect the detection of many more marginal sources, since compact binary…

General Relativity and Quantum Cosmology · Physics 2019-01-03 Yiwen Huang , Hannah Middleton , Ken K. -Y. Ng , Salvatore Vitale , John Veitch

Binary black hole (BBH) mergers detected through Gravitational Waves (GWs) are a promising probe for the cosmic expansion. These sources are standard sirens for which we can directly measure the luminosity distance, but their redshift is…

Cosmology and Nongalactic Astrophysics · Physics 2026-03-17 Arianna Scarpa , Simone Mastrogiovanni , Filippo Santoliquido , Manuel Arca-Sedda

Measuring the merger rate density history of binary neutron stars (BNS) can greatly aid in understanding the history of heavy element formation in the Universe. Currently, second-generation Gravitational Wave (GW) detectors can only measure…

High Energy Astrophysical Phenomena · Physics 2025-07-08 Yun-Fei Du , Emre Seyit Yorgancioglu , Shu-Xu Yi , Tian-Yong Cao , Shuang-Nan Zhang

Gravitational-wave cosmology began in 2017 with the observation of the gravitational waves emitted in the merger of two neutron stars, and the coincident observation of the electromagnetic emission that followed. Although only a $30\%$…

General Relativity and Quantum Cosmology · Physics 2021-11-03 Deep Chatterjee , Abhishek Hegade K. R. , Gilbert Holder , Daniel E. Holz , Scott Perkins , Kent Yagi , Nicolás Yunes

We study the impact of environmental effects on the measurement of the Hubble constant ($H_0$) from gravitational wave (GW) observations of binary black hole mergers residing in active galactic nuclei (AGNs) near the central supermassive…

Cosmology and Nongalactic Astrophysics · Physics 2025-06-16 Guo-Peng Li , Xi-Long Fan

(Abridged) While the gravitational-wave (GW) signal GW170817 was accompanied by a variety of electromagnetic (EM) counterparts, sufficiently high-mass binary neutron star (BNS) mergers are expected to be unable to power bright EM…

High Energy Astrophysical Phenomena · Physics 2020-05-13 An Chen , Nathan K. Johnson-McDaniel , Tim Dietrich , Reetika Dudi

Black hole neutron star (BHNS) mergers have recently been detected through their gravitational-wave (GW) emission. BHNS mergers could also produce electromagnetic (EM) emission as a short gamma-ray burst (sGRB), and/or an sGRB afterglow…

High Energy Astrophysical Phenomena · Physics 2022-09-20 Oliver M. Boersma , Joeri van Leeuwen

Finding the host galaxies of stellar-mass compact binary mergers will open a new window for studying their formation histories and measuring key cosmological parameters, such as the Hubble constant. To date, only one merger, GW170817, has…

Cosmology and Nongalactic Astrophysics · Physics 2026-05-01 Alberto Salvarese , Hsin-Yu Chen , Daniel E. Holz

Gravitational waves (GWs) directly measure the luminosity distance to the merger, which, when combined with an independent measurement of the source's redshift, provides a novel probe of cosmology. The proposed next generation of…

Cosmology and Nongalactic Astrophysics · Physics 2021-08-11 Christine Ye , Maya Fishbach

Mergers of black hole-neutron star (BHNS) binaries have now been observed by GW detectors with the recent announcement of GW200105 and GW200115. Such observations not only provide confirmation that these systems exist, but will also give…

We have performed detailed population synthesis on a large number (20 million) of binary systems in order to investigate the properties of massive double degenerate binaries. We have included new important results in our input physics in…

Astrophysics · Physics 2010-12-09 Rasmus Voss , Thomas M. Tauris

Following the detection of the GW170817 signal and its associated electromagnetic emissions, we discuss the prospects of the local Hubble parameter measurement using double neutron stars (DNSs). The kilonova emissions of GW170817 are…

Cosmology and Nongalactic Astrophysics · Physics 2018-01-24 Naoki Seto , Koutarou Kyutoku

Determining the Hubble constant (H0), a fundamental parameter describing cosmic expansion, remains a challenge due to conflicting measurements from the early and late universe. Gravitational wave (GW) observations from binary neutron star…

Cosmology and Nongalactic Astrophysics · Physics 2024-09-19 Kanchan Soni , Aditya Vijaykumar , Sanjit Mitra

Mergers of binary neutron stars (BNSs) emit signals in both the gravitational-wave (GW) and electromagnetic (EM) spectra. Famously, the 2017 multi-messenger observation of GW170817 led to scientific discoveries across cosmology, nuclear…

A binary neutron star (BNS) merger event has recently been observed in gravitational waves (GWs). As in the case of binary black holes, GWs generated by BNS consist of inspiral, merger, and post-merger components. Detecting the latter is…

General Relativity and Quantum Cosmology · Physics 2018-02-07 Huan Yang , Vasileios Paschalidis , Kent Yagi , Luis Lehner , Frans Pretorius , Nicolas Yunes

The detection of a secular post-merger gravitational wave (GW) signal in a binary neutron star (BNS) merger serves as strong evidence for the formation of a long-lived post-merger neutron star (NS), which can help constrain the maximum mass…

General Relativity and Quantum Cosmology · Physics 2023-11-17 Yikang Chen , Bin Liu , Shunke Ai , Lin Lan , He Gao , Yong Yuan , Zong-Hong Zhu