The science case for LIGO-India

Saleem, M.; Rana, Javed; Gayathri, V.; Vijaykumar, A.; Goyal, Srashti; Sachdev, S.; Suresh, J.; Suyamprakasam, Sudhagar; Mukherjee, Arunava; Gaur, G.; Sathyaprakash, B. S.; Pai, A.; Adhikari, R. X.; Ajith, P.; Bose, S.

doi:10.1088/1361-6382/ac3b99

Cited by 97 publications

(43 citation statements)

References 155 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the planned sensitivity improvements of Advanced LIGO and Advanced Virgo [96,97]) and the addition of two new detectors, KAGRA [98,99] and LIGO-India [100,101]), the next five years of gravitational-wave astronomy will enable significant advances in resolving some of the outstanding problems in physics and astronomy. We will explore in detail the potential of this imminent A+ detector generation (i.e.…”

Section: B Imminent Upgrade and New Detectorsmentioning

confidence: 99%

“…There have been extensive studies on the capability of next generation detectors and the scientific discoveries they enable [101,[108][109][110][111][112][113][114][115][116][117][118][119][120][121][122][123]. In this study we will focus in detail on the potential of the Voyager, ET, and CE detector generations using the Voy, ET, and CE noise curves shown in Fig.…”

Section: Future Of Gravitational-wave Astronomymentioning

confidence: 99%

See 1 more Smart Citation

Listening to the Universe with Next Generation Ground-Based Gravitational-Wave Detectors

Borhanian¹,

Sathyaprakash²

2022

Preprint

View full text Add to dashboard Cite

Section: B Imminent Upgrade and New Detectorsmentioning

confidence: 99%

Section: Future Of Gravitational-wave Astronomymentioning

confidence: 99%

Listening to the Universe with Next Generation Ground-Based Gravitational-Wave Detectors

Borhanian¹,

Sathyaprakash²

2022

Preprint

View full text Add to dashboard Cite

“…We first calculate the SNR of the postmerger signal using the prescription mentioned in Section 2.2. We use the numerical relativity simulations BAM:0002 and BAM:0098 (Bernuzzi et al 2014) (i) O5: The fifth observing run of the LIGO-Virgo-Kagra network, consisting of 3 LIGO detectors (including LIGO-India (Unnikrishnan 2013;Saleem et al 2022)), and the Virgo (Acernese et al 2014) and KAGRA (Akutsu et al 2021) detectors, operating at their A+ sensitivities.…”

Section: Resultsmentioning

confidence: 99%

Can a binary neutron star merger in the vicinity of a supermassive black hole enable a detection of a post-merger gravitational wave signal?

Vijaykumar,

Kapadia,

Ajith

2022

Preprint

Self Cite

View full text Add to dashboard Cite

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 merger, as well as the nature of any potential intermediate merger product such as hypermassive or supramassive NSs. However, the postmerger lies in the high frequency regime ( 1000 Hz) where current LIGO-Virgo detectors are insensitive. While proposed detectors such as NEMO, Cosmic Explorer and Einstein Telescope could potentially detect the postmerger for BNSs within O (10 Mpc), such events are likely to be rare. In this work, we speculate on the possibility of detecting the postmerger from BNSs coalescing in the vicinity of supermassive black holes (SMBH). The redshift produced by the gravitational field of the SMBH, as well as the BNS's proper motion around the SMBH, could effectively "stretch" the postmerger signal into the band of the detectors. We demonstrate, using a phenomenological model, that such BNS coalescences would enable constraints on the peak of the postmerger signal that would otherwise have not been possible, provided the degree of redshifting due to the SMBH can be independently acquired. We further show how such mergers would improve EOS model selection using the postmerger signal. We discuss the mechanisms that might deliver such events, and the limitations of this work.

show abstract

“…Currently, there are more than 90 confident GW detections from the merger of compact objects as identified by various data analysis pipelines summed up as GWTC-3 catalog (Abbott et al 2021a) and 4-OGC catalog (Nitz et al 2021b). In the upcoming decade, the network of ground base GW detectors is set to be expanded with the addition of LIGO-India (Saleem et al 2022). The current ground base detectors are also set to undergo phases of improvement in sensitivity (Abbott et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Parameter estimation with non stationary noise in gravitational waves data

Kumar¹,

Nitz²,

Forteza³

2022

Preprint

View full text Add to dashboard Cite

The sensitivity of gravitational-waves detectors is characterized by their noise curves which determine the detector's reach and the ability to accurately measure the parameters of astrophysical sources. The detector noise is typically modelled as stationary and Gaussian for many practical purposes. However, physical changes in the state of detectors due to environmental and instrumental factors, including extreme cases where a detector discontinues observing for some time, introduce non-stationarity into the noise. Even slow evolution of the detector sensitivity will affect long duration signals such as binary neutron star (BNS) mergers. Mis-estimation of the noise behavior directly impacts the posterior width of the signal parameters. This becomes an issue for studies which depend on accurate localization volumes such as i) probing cosmological parameters (such as Hubble constant, clustering bias) using cross-correlation methods with galaxies, ii) doing electromagnetic follow-up using localization information from parameter estimation done from pre-merger data. We study the effects of dynamical noise on the parameter estimation of the GW events. We develop a new method to correct dynamical noise by estimating a locally-valid pseudo PSD which is normalized along the time-frequency track of a potential signal. We do simulations by injecting the BNS signal in various scenarios where the detector goes through a period of non-stationarity with reference noise curve of third generation detectors (Cosmic explorer, Einstein telescope). As an example, for a source where mis-modelling of the noise biases the signal-to-noise estimate by even 10%, one would expect the estimated localization volume to be either under or over reported by ∼ 30%; errors like this, especially in low-latency, could potentially cause follow-up campaigns to miss the true source location.

show abstract

The science case for LIGO-India

Cited by 97 publications

References 155 publications

Listening to the Universe with Next Generation Ground-Based Gravitational-Wave Detectors

Listening to the Universe with Next Generation Ground-Based Gravitational-Wave Detectors

Can a binary neutron star merger in the vicinity of a supermassive black hole enable a detection of a post-merger gravitational wave signal?

Parameter estimation with non stationary noise in gravitational waves data

Contact Info

Product

Resources

About