Dwarf Galaxies and the Cosmic Web
Alejandro Benitez-Llambay, Julio F. Navarro, Mario G. Abadi, Stefan, Gottloeber, Gustavo Yepes, Yehuda Hoffman, Matthias Steinmetz

TL;DR
This paper proposes a new mechanism called cosmic web stripping, where ram-pressure from the cosmic web removes gas from low-mass halos, impacting dwarf galaxy formation and star formation histories.
Contribution
It introduces the concept of cosmic web stripping as a process affecting dwarf galaxies, based on cosmological simulations, adding a new perspective to galaxy formation models.
Findings
Gas removal from low-mass halos via ram-pressure
Impact on star formation histories of dwarf galaxies
Potential explanation for dwarf galaxy scarcity
Abstract
We use a cosmological simulation of the formation of the Local Group of Galaxies to identify a mechanism that enables the removal of baryons from low-mass halos without appealing to feedback or reionization. As the Local Group forms, matter bound to it develops a network of filaments and pancakes. This moving web of gas and dark matter drifts and sweeps a large volume, overtaking many halos in the process. The dark matter content of these halos is unaffected but their gas can be efficiently removed by ram-pressure. The loss of gas is especially pronounced in low-mass halos due to their lower binding energy and has a dramatic effect on the star formation history of affected systems. This "cosmic web stripping" may help to explain the scarcity of dwarf galaxies compared with the numerous low-mass halos expected in \Lambda CDM and the large diversity of star formation histories and…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
