Searches for continuous-wave gravitational radiation

Riles, K.

doi:10.1007/s41114-023-00044-3

Cited by 40 publications

(8 citation statements)

References 613 publications

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“…Continuous GW emission will help reveal properties of NSs such as composition (EoS), internal magnetic field, and viscosity, in addition to unveiling NSs that cannot be observed electromagnetically (e.g., Bonazzola and Gourgoulhon, 1996;Bildsten, 1998;Owen et al, 1998;Andersson and Kokkotas, 2001;Owen, 2005;Glampedakis and Gualtieri, 2018;Gittins et al, 2021;Morales and Horowitz, 2022;Riles, 2023, and references therein). Current searches for continuous GWs produced by spinning NSs with asymmetries improve with every LIGO-Virgo-KAGRA run (e.g., Abbott et al, 2022c) and dozens of known millisecond pulsars could come into the reach of nextgeneration GW detectors (Woan et al, 2018;Gupta et al, 2023a;Evans et al, 2023), with the potential of many more thanks to upcoming or next-generation electromagnetic facilities such as the next-generation Very Large Array (ngVLA; Murphy and ngVLA Science Advisory Council, 2020) and the Square Kilometre Array (Kalogera et al, 2019;Evans et al, 2023;Pagliaro et al, 2023;Riles, 2023;Wette, 2023). Detection by next-generation instruments also looks promising for bright low mass X-ray binaries such as Scorpius X-1 (Gupta et al, 2023a;Evans et al, 2023).…”

Section: New Frontiers In Mmamentioning

confidence: 99%

Multi-messenger astrophysics of black holes and neutron stars as probed by ground-based gravitational wave detectors: from present to future

Corsi,

Barsotti,

Berti

et al. 2024

Front. Astron. Space Sci.

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The ground-based gravitational wave (GW) detectors LIGO and Virgo have enabled the birth of multi-messenger GW astronomy via the detection of GWs from merging stellar-mass black holes (BHs) and neutron stars (NSs). GW170817, the first binary NS merger detected in GWs and all bands of the electromagnetic spectrum, is an outstanding example of the impact that GW discoveries can have on multi-messenger astronomy. Yet, GW170817 is only one of the many and varied multi-messenger sources that can be unveiled using ground-based GW detectors. In this contribution, we summarize key open questions in the astrophysics of stellar-mass BHs and NSs that can be answered using current and future-generation ground-based GW detectors, and highlight the potential for new multi-messenger discoveries ahead.

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Section: New Frontiers In Mmamentioning

confidence: 99%

Multi-messenger astrophysics of black holes and neutron stars as probed by ground-based gravitational wave detectors: from present to future

Corsi,

Barsotti,

Berti

et al. 2024

Front. Astron. Space Sci.

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“…No CW has been detected so far, although interesting upper limits have been established, see e.g. [430][431][432] for recent reviews. The prototypical source of CWs is a spinning neutron star, asymmetric with respect to the rotation axis, that emits a quasi-monochromatic gravitational wave whose frequency changes extremely slowly over time.…”

Section: Continuous Wavesmentioning

confidence: 99%

Science with the Einstein Telescope: a comparison of different designs

Branchesi¹,

Maggiore²,

Alonso³

et al. 2023

J. Cosmol. Astropart. Phys.

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The Einstein Telescope (ET), the European project for a third-generation gravitational-wave detector, has a reference configuration based on a triangular shape consisting of three nested detectors with 10 km arms, where each detector has a 'xylophone' configuration made of an interferometer tuned toward high frequencies, and an interferometer tuned toward low frequencies and working at cryogenic temperature. Here, we examine the scientific perspectives under possible variations of this reference design. We perform a detailed evaluation of the science case for a single triangular geometry observatory, and we compare it with the results obtained for a network of two L-shaped detectors (either parallel or misaligned) located in Europe, considering different choices of arm-length for both the triangle and the 2L geometries. We also study how the science output changes in the absence of the low-frequency instrument, both for the triangle and the 2L configurations. We examine a broad class of simple 'metrics' that quantify the science output, related to compact binary coalescences, multi-messenger astronomy and stochastic backgrounds, and we then examine the impact of different detector designs on a more specific set of scientific objectives.

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“…Continuous gravitational waves (CWs) are long-lasting gravitational wave (GW) signals whose detection remains, so far, unattained [1,2]. Among the expected sources, we find rapidly spinning non-axisymmetric neutron stars (NSs) [3], but also other more exotic ones such as evaporating boson clouds formed around spinning black holes [4,5], or planetary-mass compact binary systems [6,7].…”

Section: Introductionmentioning

confidence: 99%

Assessing the Similarity of Continuous Gravitational-Wave Signals to Narrow Instrumental Artifacts

Jaume,

Tenorio,

Sintes

2024

Universe

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Continuous gravitational-wave (CW) signals are long-lasting quasi-monochromatic gravitational-wave signals expected to be emitted by rapidly rotating non-axisymmetric neutron stars. Depending on the rotational frequency and sky location of the source, certain CW signals may behave in a similar manner to narrow-band artifacts present in ground-based interferometric detectors. Part of the detector characterization tasks in the current generation of interferometric detectors (Advanced LIGO, Advanced Virgo, and KAGRA) aim at understanding the origin of these narrow artifacts, commonly known as "spectral lines". It is expected that similar tasks will continue after the arrival of next-generation detectors (e.g., Einstein Telescope and Cosmic Explorer). Typically, a fraction of the observed lines in a given detector can be associated to one or more instrumental causes; others, however, have an unknown origin. In this work, we assess the similarity of CW signals to spectral lines in order to understand whether a CW signal may be mistaken for a noise artifact. Albeit astrophysically unlikely, our results do not rule out the possibility of a CW signal being visible in the detector’s power spectrum.

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Searches for continuous-wave gravitational radiation

Cited by 40 publications

References 613 publications

Multi-messenger astrophysics of black holes and neutron stars as probed by ground-based gravitational wave detectors: from present to future

Multi-messenger astrophysics of black holes and neutron stars as probed by ground-based gravitational wave detectors: from present to future

Science with the Einstein Telescope: a comparison of different designs

Assessing the Similarity of Continuous Gravitational-Wave Signals to Narrow Instrumental Artifacts

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