Bence Kocsis Eotvos University GALNUC team members • postdoc: Yohai Meiron, Alexander Rasskazov, Hiromichi Tagawa • phd: László Gondán, Gergely Máthé, Ákos Szölgyén • msc: Ádám Takács, Barnabás Deme, Kristóf Jakovác external collaborators: Ryan O’Leary (Colorado), Zoltan Haiman, Imre Bartos (Columbia), Bao-Minh Hoang, Smadar Naoz (UCLA), Giacomo Fragione (Jerusalem), Idan Ginzburg (CFA), Manuel Arca-Sedda (ZAH) Teruaki Suyama (Tokyo), Suichiro Yokoyama, Takahiro Tanaka (Kyoto) Scott Tremaine (IAS) Modest18, Santorini, Greece, June 27, 2018 Distinguishing source populations with LIGO/VIRGO
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Distinguishing source populations with LIGO/VIRGO€¦ · Kocsis 2013, Gondan & Kocsis in prep. Take-away • Discriminate LIGO sources using 2D mass distribution •4 for globular
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Bence Kocsis Eotvos University
GALNUC team members• postdoc: Yohai Meiron, Alexander Rasskazov, Hiromichi Tagawa
• phd: László Gondán, Gergely Máthé, Ákos Szölgyén
• msc: Ádám Takács, Barnabás Deme, Kristóf Jakovác
external collaborators: Ryan O’Leary (Colorado), Zoltan Haiman, Imre Bartos (Columbia), Bao-Minh Hoang, Smadar Naoz (UCLA),Giacomo Fragione (Jerusalem), Idan Ginzburg (CFA), Manuel Arca-Sedda (ZAH)Teruaki Suyama (Tokyo), Suichiro Yokoyama, Takahiro Tanaka (Kyoto)Scott Tremaine (IAS)
Modest18, Santorini, Greece, June 27, 2018
Distinguishing source populations
with LIGO/VIRGO
Source populations
• Field stellar binary evolution– galactic field binaries (talks by Michela Mapelli, Mario Spera)
– galactic field triples (talk by Silvia Toonen)
• Dynamical channel– globular clusters (talks by Abbas Askar, Carl Rodriguez, Giacomo Fragione)
– galactic nuclei (talks by Bao-Minh Hoang, Alexander Rasskazov, Akos Szolgyen)
– open clusters (talk by Sambaran Banderjee)
– dark matter halos, primordial black holes
• Hydrodynamical channel– Weak/failed supernova fallback (poster by Hiromichi Tagawa)
– Active galactic nuclei
Fallback driven merger
CO1
CO2
ejected gas
t=0 yr
Tagawa, Saitoh, Kocsis 2018, PRL
Fallback driven merger
N-body/SPH simulation (3D)
Ideal gas EOS
v(r)=vmax r/rmax
CO1
CO2
ejected gas
t=0 yr
Initial condition:
studies of fallback accretione.g. Zampieri et al. 1998, Batta etal. 2017
X [AU]
Y [AU]
Tagawa, Saitoh, Kocsis 2018, PRL
Fallback driven merger
Y [AU]
X [AU]
rotating
clockwise
MCO1=MCO2=5M☉
Mgas,ini=5.4M☉
Tagawa, Kocsis, Saitoh, 2018, PRL
• Rate of mergers (see also talk by Michela Mapelli)
• Mass (see also talk by Michela Mapelli)
• Distance (see also talk by Michela Mapelli)
• Spins, spin direction (see talk by Carl Rodriguez)
• Eccentricity
• Host environment
1. Absolute rates?
2. Distribution of rates?
3. Direct detection of smoking gun signatures
Distinguishing LIGO/VIRGO sources
Absolute rates
• galactic field binaries: 10 - 300 Gpc-3 yr -1 (Belczynski+ 2016, Kruczkow+
2018)
• galactic field triples: 2 - 25 Gpc-3 yr -1 (Silsbee & Tremaine 2017;