Semantic Scholar Open Access 2014 144 sitasi

Black hole lightning due to particle acceleration at subhorizon scales

M. C. J. Aleksi'c S. Ansoldi L. A. Antonelli P. Antoranz A. Babić +262 lainnya

Abstrak

Supermassive black holes with masses of millions to billions of solar masses are commonly found in the centers of galaxies. Astronomers seek to image jet formation using radio interferometry but still suffer from insufficient angular resolution. An alternative method to resolve small structures is to measure the time variability of their emission. Here we report on gamma-ray observations of the radio galaxy IC 310 obtained with the MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov) telescopes, revealing variability with doubling time scales faster than 4.8 min. Causality constrains the size of the emission region to be smaller than 20% of the gravitational radius of its central black hole. We suggest that the emission is associated with pulsar-like particle acceleration by the electric field across a magnetospheric gap at the base of the radio jet. Gamma rays that vary on a several-minute time scale suggest an origin within a supermassive black hole’s event horizon. Timing tells the structure of the unseen Nothing can move faster than the speed of light, but some gamma rays seem to break that rule. Powerful jets that balance the angular momentum of accreting black holes are difficult to discern in images, so astronomers often resort to timing their emission to reveal the physics at work. Aleksić et al. found that gamma rays from the active galaxy IC 310 varied faster than the time required for light to cross the event horizon of the supermassive black hole at its nucleus. Particle acceleration at the base of the jet may enable this apparent speed, adding a piece to the puzzle of how jets form at supermassive black holes. Science, this issue p. 1080

Topik & Kata Kunci

Penulis (267)

M

M. C. J. Aleksi'c

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S. Ansoldi

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L. A. Antonelli

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P. Antoranz

A

A. Babić

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M. F. Physik

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D-80805 Munchen

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U. Complutense

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E. Madrid

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Spain Inst. de Astrof'isica de Canarias

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University of L'od'z

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D. Zeuthen

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U. Wurzburg

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U. Padova

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Technische Universitat Dortmund

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D. Dortmund

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Unitat de F'isica de les Radiacions

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Departament de F'isica

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CERES-IEEC

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U. Barcelona

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Japanese Magic Consortium

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D. Physics

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U. Turku

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D. Physics

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Inst. for Nucl. Research

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now at Nasa Goddard Space Flight Center

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Greenbelt

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D. O. Astronomy

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U. Maryland

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College Park

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MD 20742

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Now at Institut fur Astro- und Teilchenphysik

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L. Innsbruck

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Turku

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Bhabha Atomic Research Centre

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Mumbai 400085

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also at INAF-Trieste

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now at School of ChemistryPhysics

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U. Adelaide

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Dr. Remeis-Sternwarte Bamberg

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Astronomisches Institut der Universitat Erlangen-Nurnberg

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D. Bamberg

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Max Planck Institut fur Radioastronomie

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D. Bonn

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German

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U. Valencia

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Format Sitasi

Aleksi'c, M.C.J., Ansoldi, S., Antonelli, L.A., Antoranz, P., Babić, A., Bangale, P. et al. (2014). Black hole lightning due to particle acceleration at subhorizon scales. https://doi.org/10.1126/science.1256183

Akses Cepat

Lihat di Sumber doi.org/10.1126/science.1256183
Informasi Jurnal
Tahun Terbit
2014
Bahasa
en
Total Sitasi
144×
Sumber Database
Semantic Scholar
DOI
10.1126/science.1256183
Akses
Open Access ✓