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Arizona State University Malta, Oct 2017
Fate of Gas Rich Satellites in Clusters Mohammad Safarzadeh & - - PowerPoint PPT Presentation
Fate of Gas Rich Satellites in Clusters Mohammad Safarzadeh & - - PowerPoint PPT Presentation
Fate of Gas Rich Satellites in Clusters Mohammad Safarzadeh & Evan Scannapieco Today on arXiv:1710.01319 Arizona State University Malta, Oct 2017 Ram Pressure Stripping (RPS) Chung+07 Emerick+16 DM halo Behroozi+13 Kravtsov+13
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DM halo Stellar mass
stellar disk size
gas mass
gas disk size
Behroozi+13 Kravtsov+13 popping+15 Leroy+08
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Potential=DM+Stars+Gas Potential=DM+Stars RPS
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Impact on the orbits of the stars
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Impact on the orbits of the stars
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Losing the stellar content
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Gas fraction evolution with mass and redshift
Popping+12
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Losing the stellar content
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An Ultra Diffuse Galaxy in Coma Cluster
DF44, Van Dokkum+15
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Ultra Diffuse Galaxies in Abel Cluster
Roman+16
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Transforming into an UDG
DF44, Van Dokkum+15
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Red Fraction of Satellites
Prescott+11
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Summary
- RPS of gas results in potential change in galaxies, more
effective at larger halo masses.
- Assigning the gas fraction based on observations results
in low mass satellites to lose their stellar mass more effectively.
- Ultra Diffuse Galaxies could be the result of such process.
- Low red fraction of low mass satellites could be due to
them being disrupted by this mechanism.
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Gas fraction evolution with mass and redshift
Popping+12
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Outline
- Ram pressure stripping
- Impact of change in the potential on the orbits.
- Gas fraction of galaxies across redshifts.
- Implications for Ultra Diffuse Galaxies.
- Implications for red fraction of satellites.