LIGO and the opening of a unique observational window on the universe

Kalogera, V.; Lazzarini, A.

doi:10.1073/pnas.1612908114

Cited by 3 publications

(2 citation statements)

References 73 publications

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“…Both are placed about 3000 km distance from each other. Both the instruments are ground-based interferometers having arm lengths of about 4000 meters (Kalogera et al, 2017) [3] . The first observed GWs was originated from the inward merger of binary black hole systems having 36 and 29 solar masses.…”

Section: Introductionmentioning

confidence: 99%

Gravitational waves: A review on the future astronomy

Swain¹,

Panda²,

Lima³

et al. 2022

IJMRGE

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Detection of Gravitational waves opened a new path for cosmological study in a new approach. From the detection of gravitational waves signal by advanced LIGO, its research climbed the peak. After the collaboration of LIGO and Virgo, several observations get collected from different sources of binary systems like black holes, binary neutron stars even both binary black hole and neutron star. The rigorous detection of gravitational signals may provide an additional thrust in the study of complex binary systems, dark matter, dark energy, Hubble constant, etc. In this review paper, we went through multiple research manuscripts to analyze gravitational wave signals. Here we have reviewed the history and current situation of gravitational waves detection, and we explained the concept and process of detection. Also, we go through different parts of a detector and their working. Then multiple gravitational wave signals are focused, originated from various sources and then found correlation between them. From this, the contribution of gravitational waves in different fields like complex binary systems (black holes, neutron stars), dark matter, dark energy and Hubble Constant have been discussed in this manuscript.

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Section: Introductionmentioning

confidence: 99%

Gravitational waves: A review on the future astronomy

Swain¹,

Panda²,

Lima³

et al. 2022

IJMRGE

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“…This series of discoveries has greatly deepened our understanding of the Universe; we tested the nature of gravity in a new laboratory, we understand the properties of the stellar-mass compact objects at an unprecedented level, we revealed the origin of most heavy elements nucleosynthesis, we learned the expansion of the Universe through an independent method, and so on (see, e.g., Refs. [10][11][12][13][14][15]).…”

Section: Introductionmentioning

confidence: 99%

Science with the TianQin observatory: Preliminary results on massive black hole binaries

et al. 2019

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We investigate the prospects of detecting gravitational waves from coalescing massive black hole binaries in the Universe with the TianQin observatory, a space-based gravitational wave interferometer proposed to be launched in the 2030s. To frame the scientific scope of the mission, in this paper, we carry out a preliminary estimation of the signal-to-noise ratio, detection rate, and parameter estimation precision of massive black hole binaries detectable by TianQin. In order to make our results as robust as possible, we consider several models of the growth history of massive black holes, exploring the effect of some key astrophysical prescriptions as well as the impact of the employed computational methods. In the most optimistic model, TianQin can detect as many as approximately 60 mergers per year. If TianQin detects a merger at redshift of 15, it will be capable of estimating its luminosity distance to within an accuracy of 10%; for a nearby event at redshift approximately 2, TianQin can issue early warnings 24 hours before coalescence, with a timing accuracy of around three hours and a sky localization ability of approximately 80 deg 2 , thus enabling multimessenger observations.

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The spectral analysis of GRB 150902A and the nature of its outflow

Nawaz

Sajjad

2022

Monthly Notices of the Royal Astronomical Society

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The degree of magnetisation of the jets remains an important question in Gamma-Ray Burst (GRB) physics. The magnetisation at a large distance from the initial radius also determines whether the process for non-thermal prompt emission is magnetic reconnection or internal shocks. In this article, we aim to address these questions for GRB 150902A. We carry out the spectral analysis of GRB 150902A between 8 keV and 100 GeV with the data from the Fermi gamma-ray space telescope. In both the time-integrated and time-resolved analyses, we find that the fit of the spectrum is significantly improved by the addition of a sub-dominant black-body component to the Band function. These results allow us to study and constrain the properties of the outflow. In particular, we consider different values of the efficiency of the non-thermal emission process fNT and evaluate possible ranges of the initial fraction of power in thermal form εTh for different initial radii. We find that GRB 150902A has a strong magnetic component in the initial outflow, such that εTh ≤ 0.5. Small values of the initial radius tend to favour internal shocks; high efficiency magnetic reconnection is completely excluded and relatively low efficiency magnetic reconnection is only possible if the outflow is almost entirely accelerated thermally. For larger initial radii, εTh ≪ 0.5 such that the outflow is dominated by the magnetic component initially. Such initial radii allow for the non-thermal emission process to be either magnetic reconnection or internal shocks, depending on the efficiency of the acceleration by the magnetic component.

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LIGO and the opening of a unique observational window on the universe

Cited by 3 publications

References 73 publications

Gravitational waves: A review on the future astronomy

Gravitational waves: A review on the future astronomy

Science with the TianQin observatory: Preliminary results on massive black hole binaries

The spectral analysis of GRB 150902A and the nature of its outflow

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