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The Impact of Black Holes on Star Formation in Dwarf Galaxies

Ray Sharma
November 22, 2019

The Impact of Black Holes on Star Formation in Dwarf Galaxies

Dwarf galaxies in the Romulus25 simulation form black holes and may undergo suppression of star formation due to black hole growth.

Ray Sharma

November 22, 2019
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  1. The Impact of Black Holes on Star Formation in Dwarf

    Galaxies Ray Sharma Alyson Brooks, Rachel Somerville, Michael Tremmel, Jillian Bellovary, Anna Wright, Tom Quinn
  2. Massive Black Holes (in Massive Galaxies) Ubiquitous Evidence of coeval

    growth Evidence of complex feedback IASF - Milano 2019 Ray Sharma
  3. Massive Black Holes (in Dwarf Galaxies) Not ubiquitous Limited evidence

    of coeval growth Limited evidence of feedback IASF - Milano 2019 Ray Sharma
  4. Massive Black Holes (in Dwarf Galaxies) Not ubiquitous Limited evidence

    of coeval growth Limited evidence of feedback Reines et al (2013) IASF - Milano 2019 Ray Sharma
  5. Massive Black Holes (in Dwarf Galaxies) Identified through: Emission line

    ratios Gas + stellar kinematics Broad lines Variability Dynamics IASF - Milano 2019 Ray Sharma
  6. Massive Black Holes (in Dwarf Galaxies) Identified through: Emission line

    ratios Gas + stellar kinematics Broad lines Variability Dynamics Reines et al (2013) IASF - Milano 2019 Ray Sharma
  7. Massive Black Holes (in Dwarf Galaxies) Identified through: Emission line

    ratios Gas + stellar kinematics Broad lines Variability Dynamics Reines et al (2013) Baldassare et al (2019) IASF - Milano 2019 Ray Sharma
  8. Massive black holes are hard to observe in low-mass galaxies...

    Can we simulate them? IASF - Milano 2019 Ray Sharma
  9. Massive black holes are hard to observe in low-mass galaxies...

    Can we simulate them? Yes! IASF - Milano 2019 Ray Sharma
  10. Goal How do black holes grow in isolated dwarf galaxies?

    How do dwarf galaxies change if they have a black hole? IASF - Milano 2019 Ray Sharma
  11. Goal How do black holes grow in isolated dwarf galaxies?

    How do dwarf galaxies change if they have a black hole? IASF - Milano 2019 Ray Sharma
  12. Romulus25 Simulation Properties: Cosmological hydrodynamic simulation 25 cMpc / side

    ~105 M ☉ .25 kpc Run to z=0 IASF - Milano 2019 Ray Sharma
  13. Romulus25 Simulation Properties: Cosmological hydrodynamic simulation 25 cMpc / side

    ~105 M ☉ .25 kpc Run to z=0 Black Hole Physics: Environment-based seeding Seed mass 106 M ☉ Accretion Dynamical Friction Thermal Feedback Tremmel et al (2017) IASF - Milano 2019 Ray Sharma
  14. Conclusions It is becoming more feasible to simulate BHs in

    dwarf galaxies, within a cosmological context. Isolated dwarf galaxies have diverse BH masses. Overmassive BH hosts have more rapid, earlier star formation than undermassive BH hosts. Overmassive BH hosts have lower central stellar density than undermassive BH hosts. Hosts of overmassive BHs can quench, maybe feedback? IASF - Milano 2019 Ray Sharma