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. 2014 Nov 28;346(6213):1080-4.
doi: 10.1126/science.1256183. Epub 2014 Nov 6.

Black hole physics. Black hole lightning due to particle acceleration at subhorizon scales

J Aleksić  1 S Ansoldi  2 L A Antonelli  3 P Antoranz  4 A Babic  5 P Bangale  6 J A Barrio  7 J Becerra González  8 W Bednarek  9 E Bernardini  10 B Biasuzzi  2 A Biland  11 O Blanch  1 S Bonnefoy  7 G Bonnoli  3 F Borracci  6 T Bretz  12 E Carmona  13 A Carosi  3 P Colin  6 E Colombo  14 J L Contreras  7 J Cortina  1 S Covino  3 P Da Vela  4 F Dazzi  6 A De Angelis  2 G De Caneva  10 B De Lotto  2 E de Oña Wilhelmi  15 C Delgado Mendez  13 D Dominis Prester  5 D Dorner  16 M Doro  17 S Einecke  18 D Eisenacher  19 D Elsaesser  16 M V Fonseca  7 L Font  20 K Frantzen  18 C Fruck  6 D Galindo  21 R J García López  14 M Garczarczyk  10 D Garrido Terrats  20 M Gaug  20 N Godinović  5 A González Muñoz  1 S R Gozzini  10 D Hadasch  22 Y Hanabata  23 M Hayashida  23 J Herrera  14 D Hildebrand  11 J Hose  6 D Hrupec  5 W Idec  9 V Kadenius  24 H Kellermann  6 K Kodani  23 Y Konno  23 J Krause  6 H Kubo  23 J Kushida  23 A La Barbera  3 D Lelas  5 N Lewandowska  16 E Lindfors  25 S Lombardi  3 F Longo  2 M López  7 R López-Coto  1 A López-Oramas  1 E Lorenz  26 I Lozano  7 M Makariev  27 K Mallot  10 G Maneva  27 N Mankuzhiyil  28 K Mannheim  19 L Maraschi  3 B Marcote  21 M Mariotti  17 M Martínez  1 D Mazin  6 U Menzel  6 J M Miranda  4 R Mirzoyan  6 A Moralejo  1 P Munar-Adrover  21 D Nakajima  23 A Niedzwiecki  9 K Nilsson  25 K Nishijima  23 K Noda  6 R Orito  23 A Overkemping  18 S Paiano  17 M Palatiello  2 D Paneque  6 R Paoletti  4 J M Paredes  21 X Paredes-Fortuny  21 M Persic  2 J Poutanen  24 P G Prada Moroni  29 E Prandini  11 I Puljak  5 R Reinthal  24 W Rhode  18 M Ribó  21 J Rico  1 J Rodriguez Garcia  6 S Rügamer  16 T Saito  23 K Saito  23 K Satalecka  7 V Scalzotto  17 V Scapin  7 C Schultz  17 T Schweizer  6 S N Shore  29 A Sillanpää  24 J Sitarek  30 I Snidaric  5 D Sobczynska  9 F Spanier  16 V Stamatescu  31 A Stamerra  3 T Steinbring  16 J Storz  16 M Strzys  6 L Takalo  24 H Takami  23 F Tavecchio  3 P Temnikov  27 T Terzić  5 D Tescaro  14 M Teshima  32 J Thaele  18 O Tibolla  16 D F Torres  33 T Toyama  6 A Treves  34 M Uellenbeck  18 P Vogler  11 R Zanin  21 M Kadler  16 R Schulz  35 E Ros  36 U Bach  37 F Krauß  35 J Wilms  38
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Black hole physics. Black hole lightning due to particle acceleration at subhorizon scales

J Aleksić et al. Science. .

Abstract

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.

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