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I have changed black holes to neutron stars, as well as masses, distance, energy, etc according to ref: https://en.wikipedia.org/wiki/List_of_gravitational_wave_observations
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|ra={{RA|3|11}}
|ra={{RA|3|11}}
|dec={{DEC|-44|57}}
|dec={{DEC|-44|57}}
|energy= ≈ {{val|3|ul=solar mass}} × ''c''<sup>2</sup>
|energy= ≈ {{{{!}}>0.025{{!}}ul=solar mass}} × ''c''<sup>2</sup>
}}
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'''GW170814''' was a [[gravitational wave]] signal from two [[Binary black hole|merging black holes]], detected by the [[LIGO]] and [[Virgo interferometer|Virgo]] observatories on 14 August 2017.<ref name="NYT-20170927">{{cite news |last=Overbye |first=Dennis |authorlink=Dennis Overbye |title=New Gravitational Wave Detection From Colliding Black Holes |url=https://www.nytimes.com/2017/09/27/science/black-holes-collision-ligo-virgo.html |date=27 September 2017 |work =[[The New York Times]] |accessdate=28 September 2017 }}</ref> On 27 September 2017, the LIGO and Virgo collaborations announced the observation of the signal, the fourth confirmed event after [[GW150914]], [[GW151226]] and [[GW170104]]. It was the first binary black hole merger detected by LIGO and Virgo together.<ref name="PRL-20171006">{{cite journal |collaboration=LIGO Scientific Collaboration and Virgo Collaboration |last1=Abbott |first1=Benjamin P. |title=GW170814: A three-detector observation of gravitational waves from a binary black hole coalescence |url=https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.141101 |journal=[[Phys. Rev. Lett.]] |volume=119 |issue=14 |pages=141101 |year=2017 |doi=10.1103/PhysRevLett.119.141101 |arxiv=1709.09660 |lay-summary=http://ligo.org/detections/GW170814/press-release/pr-english.pdf |bibcode= |pmid=}}</ref>
'''GW170814''' was a [[gravitational wave]] signal from two merging s[[Neutron star|neutron stars]], detected by the [[LIGO]] and [[Virgo interferometer|Virgo]] observatories on 14 August 2017.<ref name="NYT-20170927">{{cite news |last=Overbye |first=Dennis |authorlink=Dennis Overbye |title=New Gravitational Wave Detection From Colliding Black Holes |url=https://www.nytimes.com/2017/09/27/science/black-holes-collision-ligo-virgo.html |date=27 September 2017 |work =[[The New York Times]] |accessdate=28 September 2017 }}</ref> On 27 September 2017, the LIGO and Virgo collaborations announced the observation of the signal, the fourth confirmed event after [[GW150914]], [[GW151226]] and [[GW170104]]. It was the first binary black hole merger detected by LIGO and Virgo together.<ref name="PRL-20171006">{{cite journal |collaboration=LIGO Scientific Collaboration and Virgo Collaboration |last1=Abbott |first1=Benjamin P. |title=GW170814: A three-detector observation of gravitational waves from a binary black hole coalescence |url=https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.141101 |journal=[[Phys. Rev. Lett.]] |volume=119 |issue=14 |pages=141101 |year=2017 |doi=10.1103/PhysRevLett.119.141101 |arxiv=1709.09660 |lay-summary=http://ligo.org/detections/GW170814/press-release/pr-english.pdf |bibcode= |pmid=}}</ref>


==Event detection==
==Event detection==
Line 14: Line 14:
==Astrophysical origin==
==Astrophysical origin==


Analysis indicated the signal resulted from the [[inspiral]] and [[stellar collision|merger]] of a [[binary black hole|pair of black holes]] (BBH) with {{val|30.5|5.7|3.0}} and {{val|25.3|2.8|4.2}} times the [[Solar mass|mass of the Sun]], at a [[luminosity distance|distance]] of {{val|540|130|210|u=megaparsecs}} ({{val|1.8|0.4|0.7}} billion light years) from Earth.<ref name=Lincoln>[http://www.cnn.com/2017/10/01/opinions/gravitational-waves-black-holes-opinion-lincoln/index.html New detectors reveal a cosmic calamity]. Don Lincoln, CNN News, 1 October 2017</ref> The resulting [[black hole]] had a mass of {{val|53.2|3.2|2.5}} solar masses, {{val|2.7|0.4|0.3}} solar masses having been radiated away as [[gravitational energy]]. The peak [[luminosity]] of GW170814 was {{val|3.7|0.5|0.5|e=49|ul=W}}.
Analysis indicated the signal resulted from the [[inspiral]] and [[stellar collision|merger]] of a pair of binary [[Neutron star|neutron sta]]<nowiki/>rs with {{val|1.48|0.12|0.12}} and {{val|1.265|0.10|0.10}} times the [[Solar mass|mass of the Sun]], at a [[luminosity distance|distance]] of {{val|40|8|14|u=megaparsecs}} ({{val|130|26|45}} million light years) from Earth.<ref name="Lincoln">[[List of gravitational wave observations]]</ref> The resulting [[neutron star]] or [[black hole]] had a mass of {{val|2.74|0.04|0.01}} solar masses, >0.025 solar masses having been radiated away as [[gravitational energy]]. The peak [[luminosity]] of GW170814 was {{val|3.7|0.5|0.5|e=49|ul=W}}.


==Implications for general relativity==
==Implications for general relativity==

Revision as of 14:55, 18 October 2017

GW170814
The signal of GW170814 measured by Hanford, Livingston and Virgo
Right ascension3h 11m
Declination−44° 57′
Total energy output≈ {{|>0.025|ul=solar mass}} × c2
Other designationsGW170814
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[edit on Wikidata]

GW170814 was a gravitational wave signal from two merging sneutron stars, detected by the LIGO and Virgo observatories on 14 August 2017.[1] On 27 September 2017, the LIGO and Virgo collaborations announced the observation of the signal, the fourth confirmed event after GW150914, GW151226 and GW170104. It was the first binary black hole merger detected by LIGO and Virgo together.[2]

Event detection

Estimated location of GW170814.

The signal was detected at 10:30:43 UTC. The Livingston detector was the first to receive the signal, followed by the Hanford detector 8 milliseconds later and Virgo received the signal 14 milliseconds after Livingston. The detection in all three detectors lead to a very accurate estimate of the position of the source, with a 90% credible region of just 60 deg2, a factor 20 more accurate than before.[3]

Astrophysical origin

Analysis indicated the signal resulted from the inspiral and merger of a pair of binary neutron stars with 1.48+0.12
−0.12 and 1.265+0.10
−0.10 times the mass of the Sun, at a distance of 40+8
−14 megaparsecs (130+26
−45 million light years) from Earth.[4] The resulting neutron star or black hole had a mass of 2.74+0.04
−0.01 solar masses, >0.025 solar masses having been radiated away as gravitational energy. The peak luminosity of GW170814 was 3.7+0.5
−0.5×1049 W.

Implications for general relativity

General relativity predicts that gravitational waves have a tensor-like polarization. The detection in all three detectors lead to strong experimental evidence for a tensor polarization.[2][5]

See also

References

  1. ^ Overbye, Dennis (27 September 2017). "New Gravitational Wave Detection From Colliding Black Holes". The New York Times. Retrieved 28 September 2017.
  2. ^ a b Abbott, Benjamin P.; et al. (LIGO Scientific Collaboration and Virgo Collaboration) (2017). "GW170814: A three-detector observation of gravitational waves from a binary black hole coalescence". Phys. Rev. Lett. 119 (14): 141101. arXiv:1709.09660. doi:10.1103/PhysRevLett.119.141101. {{cite journal}}: Unknown parameter |lay-summary= ignored (help)
  3. ^ Update on Gravitational Wave Science from the LIGO-Virgo Scientific Collaborations (Video of the press conference), retrieved 27 September 2017
  4. ^ List of gravitational wave observations
  5. ^ "European detector spots its first gravitational wave". Elizabeth Gibney & Davide Castelvecchi. Nature. 27 September 2017. Retrieved 27 September 2017.
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