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PID2020-114915GB-I00

Financiado

PROBANDO LA GRAVEDAD RELATIVISTA CON ESPECTROSCOPIA DE AGUJEROS NEGROS Y SOMBRAS

WE LIVE IN A SCIENTIFIC ERA OF RELATIVISTIC GRAVITY IN WHICH THE DETECTION OF BLACK HOLES WITH GRAVITATIONAL WAVES AND THE DIRECT IMAGING OF SUPERMASSIVE BLACK HOLES CAPTURE OUR IMAGINATION AND MAKE HEADLINE NEWS. THE NEW GRAVIT... ver más

01/01/2020

66K€

Presupuesto del proyecto: 66K€

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UNIVERSIDAD DE MURCIA No se ha especificado una descripción o un objeto social para esta compañía.

Total investigadores 912

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Financiación concedida El organismo AGENCIA ESTATAL DE INVESTIGACIÓN notifico la concesión del proyecto el día 2020-01-01

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Líder del proyecto

UNIVERSIDAD DE MURCIA

Total investigadores 912

Presupuesto del proyecto 66K€

Descripción del proyecto WE LIVE IN A SCIENTIFIC ERA OF RELATIVISTIC GRAVITY IN WHICH THE DETECTION OF BLACK HOLES WITH GRAVITATIONAL WAVES AND THE DIRECT IMAGING OF SUPERMASSIVE BLACK HOLES CAPTURE OUR IMAGINATION AND MAKE HEADLINE NEWS. THE NEW GRAVITATIONAL WAVE ASTRONOMY WAS BORN IN THE AFTERMATH OF THE DETECTION OF SUCH SIGNALS BY THE LIGO/VIRGO OBSERVATORIES. THESE INSTRUMENTS ALLOW US, FOR THE FIRST TIME, TO PROBE THE PHYSICS OF STRONG GRAVITY DURING THE GRAVITATIONAL RADIATION-DRIVEN MERGERS OF COMPACT OBJECT (BLACK HOLE AND NEUTRON STAR) BINARIES. THEIR DESCENDANTS, THE LISA SPACE OBSERVATORY AND THE UNDERGROUND EINSTEIN TELESCOPE, COME WITH THE PROMISE OF DISCOVERING NEW TYPES OF GRAVITATIONAL WAVE SOURCES AND OF MEASURING BLACK HOLE PARAMETER WITH A FRACTION OF A PERCENT ACCURACY. ONE OF THE MAJOR OBJECTIVES OF THE FLEDGLING NEW ASTRONOMY IS TO TEST EINSTEINS THEORY OF GENERAL RELATIVITY (GR) IN A REGIME PREVIOUSLY INACCESSIBLE BY EXISTING SOLAR SYSTEM AND BINARY PULSAR TESTS. CRUCIALLY, THIS STRONG GRAVITY REGIME IS PRECISELY WHERE GR MAY SIGNIFICANTLY DEVIATE FROM OTHER PROPOSED NON-GR THEORIES OF GRAVITY. AS FAR AS BLACK HOLES ARE CONCERNED, GR MAKES THE REMARKABLE PREDICTION THAT ASTROPHYSICAL BLACK HOLES SHOULD UNIQUELY BE DESCRIBED BY THE KERR SPACETIME SOLUTION; THIS IS THE SO-CALLED KERR HYPOTHESIS. THIS UNIQUENESS PROPERTY MAY BE LOST IN OTHER THEORIES OF GRAVITY. GRAVITATIONAL WAVE OBSERVATIONS SHOULD ALSO BE ABLE TO SHED LIGHT ON THE POSSIBLE EXISTENCE OF BLACK HOLE MIMICKER. THESE THEORETICAL OBJECTS (SUCH AS GRAVASTARS AND BOSON STARS) ARE ULTRACOMPACT AND HORIZONLESS SO THAT CONVENTIONAL PHOTON TELESCOPES COULD MISTAKE THEM FOR BLACK HOLES. THESE BLACK HOLE IMPOSTORS, HOWEVER, ARE EXPECTED TO BE BEHAVE LESS STEALTHY THROUGH THE GRAVITATIONAL WAVE SIGNAL THEY EMIT DURING A BINARY SYSTEM INSPIRAL AND MERGER. BLACK HOLES CAN ALSO BE OBSERVED VIA TRADITIONAL PHOTON TELESCOPES PROVIDED THEY CAN INTERACT WITH MATTER IN THEIR VICINITY. A CASE IN POINT IS THE RECENT SPECTACULAR DIRECT IMAGE OF THE SUPERMASSIVE BLACK HOLE OF THE M87 GALAXY RECENTLY OBTAINED BY THE EVENT HORIZON TELESCOPE NETWORK OF RADIO TELESCOPES. THIS IMAGE IS A PHOTOGRAPH OF THE SHADOW CAST BY THE BLACK HOLE WHEN ILLUMINATED BY HOT ACCRETING MATTER AND CARRIES INFORMATION ABOUT THE PRESENCE OF AN EVENT HORIZON AND A PHOTON RING. THIS PROJECT MAKES CONTACT WITH ALL OF THE PRECEDING TOPICS AND ITS CENTRAL THEME IS THE TEST OF THE KERR SPACETIME OF ASTROPHYSICAL BLACK HOLES (AND AS CONSEQUENCE OF GR ITSELF). THE MAIN OBJECTIVE IS TO STUDY BLACK HOLES IN NON-GR THEORIES OF GRAVITY (OR PARAMETRISED DEFORMED KERR SPACETIMES) AND CALCULATE THEIR CHARACTERISTIC QUASINORMAL MODE SPECTRA. THIS TECHNIQUE OF BLACK HOLE SPECTROSCOPY (AKIN TO THE USUAL SPECTROSCOPY OF ATOMIC LINES) CAN THEN BE USED TO TEST THE KERR UNIQUENESS HYPOTHESIS VIA OBSERVATIONS OF THE GRAVITATIONAL WAVE RINGDOWN DURING THE FINAL STAGE OF BLACK HOLE MERGERS. THE SAME APPROACH WILL BE USED TO STUDY THE GRAVITATIONAL WAVE SIGNATURE OF ULTRACOMPACT BLACK HOLE MIMICKERS IN GR. MOREOVER, THE PROPOSED RESEARCH INCLUDES A STUDY OF THE GRAVITATIONAL WAVE EMISSION DURING THE INSPIRAL OF AN EXTREME MASS RATIO BLACK HOLE SYSTEM, ASSUMING A NON-KERR SPACETIME. IN A SIMILAR FASHION THE PROJECT EXPLORES THE IMPLICATIONS OF NON-KERR SPACETIME TO THE GEOMETRIC SHAPE OF BLACK HOLE SHADOWS. RAVITY\GRAVITATIONAL WAVES\BLACK HOLES\GENERAL RELATIVITY

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