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We present a method to characterize statistically the parameters of a detached binary sample - binary fraction, separation distribution, and mass ratio distribution - using noisy radial-velocity data with as few as two, randomly spaced,…

Solar and Stellar Astrophysics · Physics 2015-06-04 Dan Maoz , Carles Badenes , Steven J. Bickerton

Gravitational waves (GWs) from the galactic double white dwarf (DWD) systems are one of the primary targets for upcoming space-based detectors. Due to their vast abundance and widespread distribution throughout the Galactic disk and bulge,…

Astrophysics of Galaxies · Physics 2026-04-16 Yan Sun , Yong Yuan , Minghui Du , Wen-Fan Feng , Xilong Fan , Peng Xu

An extreme-mass-ratio system composed of a white dwarf (WD) and a massive black hole can be observed by the low-frequency gravitational wave detectors, such as the Laser Interferometer Space Antenna (LISA). When the mass of the black hole…

High Energy Astrophysical Phenomena · Physics 2018-04-06 Wen-Biao Han , Xi-Long Fan

Resolving individual gravitational waves from tens of millions of double white dwarf (DWD) binaries in the Milky Way is a challenge for future space-based gravitational wave detection programs. By using previous data to define the priors…

High Energy Astrophysical Phenomena · Physics 2023-09-13 Pin Gao , Xi-Long Fan , Zhou-Jian Cao , Xue-Hao Zhang

Neutron star$-$white dwarf (NSWD) binaries are one of the most abundant sources of gravitational waves (GW) in the Milky Way. These GW sources are the evolutionary products of primordial binaries that experienced many processes of binary…

High Energy Astrophysical Phenomena · Physics 2024-03-11 Jian-Guo He , Yong Shao , Xiao-Jie Xu , Xiang-Dong Li

Galactic binaries are expected to be the most numerous LISA sources and to produce a stochastic gravitational-wave foreground whose spectral shape encodes information about the underlying population. Extracting this information with…

High Energy Astrophysical Phenomena · Physics 2026-05-12 Federico De Santi , Alessandro Santini , Alexandre Toubiana , Nikolaos Karnesis , Davide Gerosa

We determine the main properties of the Galactic binary black hole (BBH) population detectable by LISA and strategies to distinguish them from the much more numerous white dwarf binaries. We simulate BBH populations based on cosmological…

Astrophysics of Galaxies · Physics 2020-03-18 Alberto Sesana , Astrid Lamberts , Antoine Petiteau

The prime candidate sources for the upcoming space-borne gravitational wave (GW) observatory LISA are the numerous Galactic tight binaries of white dwarfs (WDs) and neutron stars (NSs), many of which will coalesce and undergo mass transfer,…

Solar and Stellar Astrophysics · Physics 2020-11-25 Thomas M. Tauris

The cosmic distance scale is built on multiple different techniques for estimating distances in space that are often connected and dependent on multiple measurements and assumptions. Double white dwarf binaries (DWDs) are common objects and…

High Energy Astrophysical Phenomena · Physics 2026-02-12 Yuetong Zhao , L. Hellström , Siqi Zhang , M. Giersz , A. Askar , Youjun Lu , Zhoujian Cao , D. Belloni , G. Wiktorowicz , M. Górski

White dwarfs (WD) with main-sequence (MS) companions are crucial probes of stellar evolution. However, due to the significant difference in their luminosities, the WD is often outshined by the MS star. The aim of this work is to find hidden…

Solar and Stellar Astrophysics · Physics 2025-06-03 Xabier Pérez-Couto , Minia Manteiga , Eva Villaver

We explore the long-term evolution of mass-transferring white dwarf binaries undergoing both direct-impact and disk accretion and explore implications of such systems to gravitational wave astronomy. We cover a broad range of initial…

High Energy Astrophysical Phenomena · Physics 2017-09-13 Kyle Kremer , Katelyn Breivik , Shane L. Larson , Vassiliki Kalogera

Mass and distance are fundamental quantities to measure in gravitational-wave (GW) astronomy. However, recent studies suggest that the measurement may be biased due to the acceleration of GW source. Here we develop an analytical method to…

High Energy Astrophysical Phenomena · Physics 2021-02-17 Zeyuan Xuan , Peng Peng , Xian Chen

We estimate the upper frequency cutoff of the galactic white dwarf binaries gravitational wave background that will be observable by the LISA detector. This is done by including the modulation of the gravitational wave signal due the motion…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Andrzej Krolak , Massimo Tinto

Double white dwarf binaries are an important remnant of binary evolution as they are possible type Ia supernova progenitors and strong sources of gravitational waves in the low-frequency regime. The double-lined double white dwarf (DBL)…

The millihertz gravitational-wave frequency band is expected to contain a rich symphony of signals with sources ranging from galactic white dwarf binaries to extreme mass ratio inspirals. Many of these gravitational-wave signals will not be…

Instrumentation and Methods for Astrophysics · Physics 2021-09-14 Sharan Banagiri , Alexander Criswell , Tommy Kuan , Vuk Mandic , Joseph D. Romano , Stephen R. Taylor

The Laser Interferometer Space Antenna (LISA) mission, scheduled for launch in the early 2030s, is a gravitational wave observatory in space designed to detect sources emitting in the milli-Hertz band. In contrast to the present ground…

Instrumentation and Methods for Astrophysics · Physics 2021-08-25 Nikolaos Karnesis , Stanislav Babak , Mauro Pieroni , Neil Cornish , Tyson Littenberg

The Gravitation Wave (GW) signals from a large number of double white dwarfs (DWDs) in the Galaxy are expected to be detected by space GW detectors, e.g., the Laser Interferometer Space Antenna (LISA), Taiji, and Tianqin in the millihertz…

Astrophysics of Galaxies · Physics 2024-11-15 Siqi Zhang , Furen Deng , Youjun Lu , Shenghua Yu

We evaluate the prospects for radio follow-up of the double neutron stars (DNSs) in the Galactic disk that could be detected through future space-borne gravitational wave (GW) detectors. We first simulate the DNS population in the Galactic…

High Energy Astrophysical Phenomena · Physics 2023-05-31 Wen-Fan Feng , Jie-Wen Chen , Yan Wang , Soumya D. Mohanty , Yong Shao

Galactic compact binaries with orbital periods shorter than a few hours emit detectable gravitational waves at low frequencies. Their gravitational wave signals can be detected with the future Laser Interferometer Space Antenna (LISA).…

Determining the mass of the neutron stars (NSs) accurately improves our understanding of the NS interior and complicated binary evolution. However, the masses of the systems are degenerate with orbital inclination angle when using solely…

High Energy Astrophysical Phenomena · Physics 2025-03-18 Kaye Jiale Li , Jane SiNan Long , Kinwah Wu , Albert K. H. Kong
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