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Sérsic Meeting - Córdoba, Argentina

December 5th, 2023

Jorge Moreno

Pomona / Flatiron

The intriguing lives of galaxies lacking dark matter

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Hênîa/Kâmîare People (“Comechingones”)

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Acknowledgements

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Acknowledgements

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Galaxies lacking dark matter

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NGC 1052 DF2

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NGC 1052 DF2

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NGC 1052 DF2

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NGC 1052 DF2

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NGC 1052 DF2

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NGC 1052 DF2

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NGC 1052 DF2

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NGC 1052 DF2

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NGC 1052 DF2

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NGC 1052 DF2

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NGC 1052 DF2

NGC 1052 DF4

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NGC 1052 DF2

NGC 1052 DF4

DF2

DF4

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Is the standard paradigm in trouble?

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Can we explain this with simulations?

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What do they have in common?

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Two dark-matter deficient galaxies in the observations:

DF2 and DF4 in the NGC 1052 group

Seven dark-matter deficient galaxies in FIREbox

Satellites, tidal features, red

Three very close to their massive host

One very far away (“backsplash”)

Three in the same group

Wolf is the most similar to DF2 and DF4

Mini-Review:

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Two dark-matter deficient galaxies in the observations:

DF2 and DF4 in the NGC 1052 group

Seven dark-matter deficient galaxies in FIREbox

Satellites, tidal features, red

Three very close to their massive host

One very far away (“backsplash”)

Three in the same group

Wolf is the most similar to DF2 and DF4

Mini-Review:

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Two dark-matter deficient galaxies in the observations:

DF2 and DF4 in the NGC 1052 group

Seven dark-matter deficient galaxies in FIREbox

Satellites, tidal features, red

Three very close to their massive host

One very far away (“backsplash”)

Three in the same group

Wolf is the most similar to DF2 and DF4

Mini-Review:

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Two dark-matter deficient galaxies in the observations:

DF2 and DF4 in the NGC 1052 group

Seven dark-matter deficient galaxies in FIREbox

Satellites, tidal features, red

Three very close to their massive host

One very far away (“backsplash”)

Three in the same group

Wolf is the most similar to DF2 and DF4

Mini-Review:

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Two dark-matter deficient galaxies in the observations:

DF2 and DF4 in the NGC 1052 group

Seven dark-matter deficient galaxies in FIREbox

Satellites, tidal features, red

Three very close to their massive host

One very far away (“backsplash”)

Three in the same group

Wolf is the most similar to DF2 and DF4

Mini-Review:

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Two dark-matter deficient galaxies in the observations:

DF2 and DF4 in the NGC 1052 group

Seven dark-matter deficient galaxies in FIREbox

Satellites, tidal features, red

Three very close to their massive host

One very far away (“backsplash”)

Three in the same group

Wolf is the most similar to DF2 and DF4

Mini-Review:

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Two dark-matter deficient galaxies in the observations:

DF2 and DF4 in the NGC 1052 group

Seven dark-matter deficient galaxies in FIREbox

Satellites, tidal features, red

Three very close to their massive host

One very far away (“backsplash”)

Three in the same group

Wolf is the most similar to DF2 and DF4

Mini-Review:

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How are dark matter

deficient galaxies created?

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To become dark-matter deficient:

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To become dark-matter deficient:

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To become dark-matter deficient:

30% of centrals with host one

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To become dark-matter deficient:

30% of centrals with host one

Mini-Review:

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