Tag Archives: LIGO

LIGO’s new Gravitational Pulse – puzzling for Black-Hole interpretations

The four instances of the inspiral-merger pattern of a gravitation pulse from coalescing binary objects are over-interpreted and raise statistical questions. The final ring-down is too weak to distinguish exotic ‘Black Hole’ mergers from neutron star mergers. Why no identifications of the expected closer smaller merging events? The extraordinary claim to ‘primordial’ Black Holes is based on uncertain indications of spins. Continue reading

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Fixing the Nobel prize for LIGO/gravitational-waves comes unstuck

They got the application in by the 31 January deadline, stimulated a lot of endorsements and swept up an array of other awards – Gruber Cosmology Prize, the Kavli Prize in Astrophysics, the Shaw Prize in Astronomy, Special Breakthrough Prize … Continue reading

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Do details in LIGO’s signals distinguish ‘frozen stars’ from ‘black hole’ interpretations

R. J. Spivey argues that “Coincident down-chirps in GW150914 betray the absence of event  horizons”.  The LIGO discovery is said to confirm Einstein’s gravitation theory, yet Einstein (in 1939) gave mathematical grounds for dismissing the notion that black holes exist, … Continue reading

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Second Gravitational Wave signal – Coalescing binary components, not Black Holes

Following the February discovery, a second signal was found by the same LIGO team in the ‘noise’, by looking for a pulse of waves of increasing frequency in the two detectors.  This pulse is longer (~55 waves compared with ~10 previously) … Continue reading

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Gruber Prize for LIGO team’s gravitational waves

The 2016 Gruber Cosmology Prize of $500 000 award citation reads: The Gruber Foundation proudly presents the 2016 Cosmology Prize to Rainer Weiss, Kip Thorne, Ronald Drever, and the entire LIGO team for pursuing a vision to observe the universe … Continue reading

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LIGO scientists row back on claim to detect black-holes from their gravitational signal

It is gradually coming out that LIGO’s main gravitational wave pulse could indicate various types of binary astrophysical systems, as we said on this blog in February. Cardoso et al 2016 point out (Phys Rev Lett. to come) there are … Continue reading

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Gravitational wave event at last – success for Einstein, not black-holes

Detecting gravitational waves after decades of searching and developing more sensitive techniques is a great achievement, in technology as well as the accompanying analysis. What a pity the research teams have sullied the discovery by conflating the detection of a … Continue reading

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