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The Properties of Simulated Jellyfish

12 Dec 2018, 15:00 UTC
The Properties of Simulated Jellyfish
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Title: Jellyfish galaxies with the IllustrisTNG simulations: I. Gas-stripping phenomena in the full cosmological contextAuthors: Kiyun Yun, Annalisa Pillepich, Elad Zinger, Dylan Nelson, Martina Donnari, Gandhali Joshi, Vicente Rodriguez-Gomez, Shy Genel, Rainer Weinberger, Mark Vogelsberger, Lars HernquistFirst Author’s Institution: Max Planck Institute for Astronomy, Heidelberg, GermanyStatus: Submitted to MNRAS, open access on arXivWhen an astronomer glances through a telescope at the night sky, the last thing they expect to see is a sea creature. However, it is difficult to deny that a fairly large number of galaxies bear a remarkable resemblance to that most noble of cnidarians, the jellyfish. These so-called “jellyfish galaxies” have peculiar shapes that visually resemble jellyfish tentacles trailing behind the main body of the galaxy and are often found inside galaxy clusters, acting as a satellite of the cluster’s central galaxy. But although it is known that they appear in clusters, we still don’t know how they take shape. The authors of today’s paper use cosmological simulations to create simulated jellyfish galaxies and learn more about how these intriguing structures are formed.Figure 1: An example of an observed jellyfish galaxy, showing bright pink “tentacles” trailing to the bottom left behind the main body of the galaxy, ...

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