Magyar
Atomfizikai Tanszék

Bence Kocsis


assistant professor


PhD (Eötvös, 2007)


Atomfizikai Tanszék

 

Office: 3.139

 

 

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Biography:
Bence Kocsis received his MSc (2004) and PhD (2007) at Eötvös. Between 2006-2008 and 2009-2013, he was a predoctoral, postdoctoral, and NASA Einstein fellow at Harvard, and between 2008-2009 and 2013-2015 a member of the Institute for Advanced Study, Princeton, before returning to Eötvös as a faculty member in 2015. He was awarded the Junior Prima Award in 2008 and an ERC Starting Grant in 2015. Kocsis leads a new astrophysical dynamics group at Eötvös.

Bence Kocsis is interested in a broad range of topics in theoretical astrophysics. He made predictions for future sources of gravitational waves with LIGO, LISA, and pulsar timing arrays, and examined the interaction of gravitational waves with stars and gaseous disks. He pointed out that LIGO may detect the gravitational wave echos of black hole mergers, LISA may detect the self-gravitational contraction of gravitational wave packets, LISA and pulsar timing arrays may detect the imprints of a gaseous disk in merging supermassive black hole binaries, and pulsars in the Galactic center may be used to identify intermediate mass black holes. With collaborators (Bartos, Haiman, and Marka) they pointed out that these mysterious objects may also be detected through X-ray flares of the G2 cloud. Kocsis developed a steady state model of supermassive black hole accretion and pointed out that periodic variability is key in their detection. Recently, he developed a new algorithm, based on condensed matter physics methods, to describe the collective behavior of dense stellar systems and wrote the NRING supercomputer code to simulate this phenomenon.

Kocsis worked with and coadvised several graduate students. With Ryan O'Leary they pointed that eccentric gravitational wave capture sources may be among the most important sources for LIGO and VIRGO. With Bence Béky, they introduced a method for measuring the structure of supermassive black hole accretion disks in distant extragalactic active galactic nuclei using stellar transits. With András Pál, they introduced the concept of transit duration variation to examine eccentric exoplanetary systems. With Gongjie Li, they discovered a gravitational three-body mechanism that can flip the orbits of eccentric planetary systems. With Balázs Mikóczi, they showed that the gravitational wave spectral line splitting is detectable in eccentric gravitational wave binaries with LISA.

 


Publications at MTMT


Publications in ADS

Publications in Google Scholar

Selected publications of the last five years:

[1] B. Kocsis, N. Yunes, A. Loeb, "Observable Signatures of EMRI Black Hole Binaries Embedded in Thin Accretion Disks", PRD, 84, 024032 (2011)

[2] B. Kocsis, N. Yunes, A. Loeb, Z. Haiman "Imprint of Accretion Disk-Induced Migration on Gravitational Waves from Extreme Mass Ratio Inspirals", PRL, 107, 171103 (2011)

[3] B. Kocsis, S. Tremaine, "Resonant relaxation and the warp of the stellar disc in the Galactic Centre", MNRAS, 412, 187 (2011)

[4] B. Kocsis, A. Sesana, "Gas-driven massive black hole binaries: signatures in the nHz gravitational wave background", MNRAS, 411, 1467, (2011)

[5] B. Kocsis, Z. Haiman, A. Loeb, "Gas pile-up, gap overflow and Type 1.5 migration in circumbinary discs: general theory", MNRAS, 427, 2660 (2012)

[6] B. Kocsis, Z. Haiman, A. Loeb, "Gas pile-up, gap overflow and Type 1.5 migration in circumbinary discs: application to supermassive black hole binaries", MNRAS, 427, 2680 (2012)

[7] B. Kocsis & J. Levin, "Repeated Bursts from Relativistic Scattering of Compact Objects in Galactic Nuclei", PRD, 85, 123005 (2012)

[8] B. Kocsis, A. Ray, S. Portegies Zwart, "Mapping the Galactic Center with Gravitational Wave Measurements Using Pulsar Timing", ApJ, 752, 67 (2012)

[9] S. Naoz; B. Kocsis, A. Loeb, N. Yunes, "Resonant Post-Newtonian Eccentricity Excitation in Hierarchical Three-body Systems", ApJ, 773, 187 (2013)

[10] I. Bartos, Z. Haiman, B. Kocsis, Sz. Márka, "Gas Cloud G2 Can Illuminate the Black Hole Population Near the Galactic Center", PRL, 110, 221102 (2013)

 

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