Widowed stars probe BH kicks Bin C osmos Mathieu Renzo PhD in - - PowerPoint PPT Presentation

widowed stars probe bh kicks
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Widowed stars probe BH kicks Bin C osmos Mathieu Renzo PhD in - - PowerPoint PPT Presentation

Anton Pannekoek Institute Widowed stars probe BH kicks Bin C osmos Mathieu Renzo PhD in Amsterdam Collaborators: S. E. de Mink, E. Zapartas, Y. G otberg, E. Laplace, R. J. Farmer, S. Toonen, S. Justham, R. G. Izzard, D. J. Lennon,


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SLIDE 1

Anton Pannekoek Institute

“Widowed” stars probe BH kicks

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Bin

C

  • smos

Mathieu Renzo

PhD in Amsterdam Collaborators: S. E. de Mink, E. Zapartas, Y. G¨

  • tberg, E. Laplace,
  • R. J. Farmer, S. Toonen, S. Justham, R. G. Izzard,
  • D. J. Lennon, H. Sana, S. N. Shore
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SLIDE 2

Anton Pannekoek Institute

A way to constrain BH kicks with Gaia

0.0 1.0 0.0 1.0 Probability×105 10 20 30 40 50 60 70 Mdis [M⊙] 0.0 1.0

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Massive runaways mass function (v ≥ 30 km s−1, M ≥ 7.5 M⊙)

Renzo et al., submitted, arXiv:1804.09164

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SLIDE 3

Anton Pannekoek Institute

A way to constrain BH kicks with Gaia

0.0 1.0 0.0 1.0 Probability×105 10 20 30 40 50 60 70 Mdis [M⊙] 0.0 1.0

BH momentum kick (σkick = 265 km s−1, fiducial)

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Massive runaways mass function (v ≥ 30 km s−1, M ≥ 7.5 M⊙)

Renzo et al., submitted, arXiv:1804.09164

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SLIDE 4

Anton Pannekoek Institute

A way to constrain BH kicks with Gaia

0.0 1.0 0.0 1.0 Probability×105

BH: σkick = 100 km s−1 NS: σkick = 265 km s−1 (no fallback for BH)

10 20 30 40 50 60 70 Mdis [M⊙] 0.0 1.0

BH momentum kick (σkick = 265 km s−1, fiducial)

2 / 32

Massive runaways mass function (v ≥ 30 km s−1, M ≥ 7.5 M⊙)

Renzo et al., submitted, arXiv:1804.09164

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SLIDE 5

Anton Pannekoek Institute

A way to constrain BH kicks with Gaia

0.0 1.0

BH kick=NS kick (σkick = 265 km s−1) (no fallback)

0.0 1.0 Probability×105

BH: σkick = 100 km s−1 NS: σkick = 265 km s−1 (no fallback for BH)

10 20 30 40 50 60 70 Mdis [M⊙] 0.0 1.0

BH momentum kick (σkick = 265 km s−1, fiducial)

2 / 32

Massive runaways mass function (v ≥ 30 km s−1, M ≥ 7.5 M⊙)

Renzo et al., submitted, arXiv:1804.09164

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SLIDE 6

Anton Pannekoek Institute

Outline

Backup slides

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SLIDE 7

Anton Pannekoek Institute

Most common massive binary evolution

4 / 32 Credits: ESO, L. Calc ¸ada, M. Kornmesser, S.E. de Mink

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SLIDE 8

Anton Pannekoek Institute

Spin up, pollution, and rejuvenation

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The binary disruption shoots out the accretor

Spin up: Packet ’81, Cantiello et al. ’07, de Mink et al. ’13 Pollution: Blaauw ’93 Rejuvenation: Hellings ’83, Schneider et al. ’15

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SLIDE 9

Anton Pannekoek Institute

What exactly disrupts the binary?

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  • Unbinding Matter

(e.g., Blaauw ’61)

  • Ejecta Impact

(e.g., Wheeler et al. ’75, Tauris & Takens ’98, Liu et al. ’15)

  • SN Natal Kick

(e.g., Shklovskii ’70, Janka ’16)

86+11

−9 % of massive binaries are disrupted

Renzo et al. 18, arXiv:1804.09164

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SLIDE 10

Anton Pannekoek Institute

What exactly disrupts the binary?

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  • Unbinding Matter

(e.g., Blaauw ’61)

  • Ejecta Impact

(e.g., Wheeler et al. ’75, Tauris & Takens ’98, Liu et al. ’15)

  • SN Natal Kick

(e.g., Shklovskii ’70, Janka ’16)

86+11

−9 % of massive binaries are disrupted

Renzo et al. 18, arXiv:1804.09164

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SLIDE 11

Anton Pannekoek Institute

What exactly disrupts the binary?

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  • Unbinding Matter

(e.g., Blaauw ’61)

  • Ejecta Impact

(e.g., Wheeler et al. ’75, Tauris & Takens ’98, Liu et al. ’15)

  • SN Natal Kick

(e.g., Shklovskii ’70, Janka ’16)

vdis ≃ vpre−SN

2,orb

=

M1 M1+M2

  • G(M1+M2)

a

Most binaries produce a slow “walkaway” star 86+11

−9 % of massive binaries are disrupted

Renzo et al. 18, arXiv:1804.09164

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Anton Pannekoek Institute

SN natal kick

Physically: ν emission and/or ejecta anisotropies

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Observationally: vpulsar ≫ vOB−stars

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SLIDE 13

Anton Pannekoek Institute

SN natal kick

Physically: ν emission and/or ejecta anisotropies

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Observationally: vpulsar ≫ vOB−stars

BH kicks?

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SLIDE 14

Anton Pannekoek Institute

Velocity distribution: Runaways

8 / 32 Renzo et al., submitted, arXiv:1804.09164

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SLIDE 15

Anton Pannekoek Institute

Velocity distribution: Walkaways

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Take home points:

  • Walkaways outnumber the runaways by ∼ 10×
  • Binaries barely produce vdis 60 km s−1
  • All runaways from binaries are post-interaction objects

Renzo et al., submitted, arXiv:1804.09164

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Anton Pannekoek Institute

Velocity distribution: Walkaways

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Take home points:

  • Walkaways outnumber the runaways by ∼ 10×
  • Binaries barely produce vdis 60 km s−1
  • All runaways from binaries are post-interaction objects

Renzo et al., submitted, arXiv:1804.09164

Under-production of runaways because mass transfer widens the binaries and makes the secondary more massive