11/4/2022 0 Comments Hot gas halos ram pressureSimilarly, their stars are subject to tidal stripping, which arises due to differences in the gravitational potential of the satellite galaxy and its host.įigure 1: Examples of dwarfs visually classified as early-type (ETG) and late-type (LTG). For example, their gas content can become extremely disturbed (and sometimes completely removed) by ram pressure stripping, which can eventually bring star formation in the satellite to a halt (see this astrobite for a summary of the seminal paper on ram pressure stripping). These interactions between a satellite galaxy and its host can have devastating effects on the satellite galaxy itself. Satellite galaxies are subject to many different interactions with their host dark matter halo. Many dwarf galaxies are satellite galaxies, meaning that they are found in orbit within a larger host dark matter halo that also typically contains a larger central galaxy (for example, the Small and Large Magellanic Clouds are satellite galaxies, both in orbit of our own Milky Way). All galaxies are thought to be surrounded by a halo of dark matter (see this astrobite for more details). The observed differences in sizes, shapes, and colours of dwarf galaxies is believed to be at least in part due to differences in the environment they inhabit. Title: ELVES I: Structures of Dwarf Satellites of MW-like Galaxies Morphology, Scaling Relations, and Intrinsic Shapesįirst Author’s Institution: Princeton Universityĭwarf galaxies are thought to be incredibly suggestible there has been a range of diverse dwarf galaxies observed in our universe, indicating that they are extremely sensitive to their surroundings. We hope you enjoy this post from astrobites the original can be viewed at. As part of the partnership between the AAS and astrobites, we occasionally repost astrobites content here at AAS Nova. Editor’s note: Astrobites is a graduate-student-run organization that digests astrophysical literature for undergraduate students.
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