Structure, Kinematics, and Observability of the Large Magellanic Cloud's Dynamical Friction Wake in Cold versus Fuzzy Dark Matter
| dc.contributor.author | Foote, Hayden R., Besla, Gurtina, Mocz, Philip, Garavito-Camargo, Nicolas, Lancaster, Lachlan, Sparre, Martin, Cunningham, Emily C., Vogelsberger, Mark, Gomez, Facundo A., Laporte, Chervin F. P. | |
| dc.date.accessioned | 2024-11-27T21:50:37Z | |
| dc.date.available | 2024-11-27T21:50:37Z | |
| dc.date.issued | 2023/09/01 | |
| dc.description.abstract | The Large Magellanic Cloud (LMC) will induce a dynamical friction (DF) wake on infall to the Milky Way (MW). The MW's stellar halo will respond to the gravity of the LMC and the dark matter (DM) wake, forming a stellar counterpart to the DM wake. This provides a novel opportunity to constrain the properties of the DM particle. We present a suite of high-resolution, windtunnel-style simulations of the LMC's DF wake that compare the structure, kinematics, and stellar tracer response of the DM wake in cold DM (CDM), with and without self-gravity, versus fuzzy DM (FDM) with m a = 10-23 eV. We conclude that the self-gravity of the DM wake cannot be ignored. Its inclusion raises the wake's density by & SIM,10%, and holds the wake together over larger distances (& SIM,50 kpc) than if self-gravity is ignored. The DM wake's mass is comparable to the LMC's infall mass, meaning the DM wake is a significant perturber to the dynamics of MW halo tracers. An FDM wake is more granular in structure and is & SIM,20% dynamically colder than a CDM wake, but with comparable density. The granularity of an FDM wake increases the stars' kinematic response at the percent level compared to CDM, providing a possible avenue of distinguishing a CDM versus FDM wake. This underscores the need for kinematic measurements of stars in the stellar halo at distances of 70-100 kpc. | |
| dc.identifier.doi | http://dx.doi.org/10.3847/1538-4357/ace533 | |
| dc.identifier.issn | 0004-637X | |
| dc.identifier.uri | https://publicacionesabiertas.userena.cl/handle/123456789/107 | |
| dc.language | English | |
| dc.publisher | IOP Publishing Ltd | |
| dc.subject | MILKY-WAY, STELLAR HALO, GALAXY FORMATION, LAMBDA-CDM, TOTAL MASS, I., INFALL, DISC, CONSTRAINTS, RELAXATION | |
| dc.title | Structure, Kinematics, and Observability of the Large Magellanic Cloud's Dynamical Friction Wake in Cold versus Fuzzy Dark Matter | |
| dc.type | Article |
