Modelling the Track of the GD-1 Stellar Stream Inside a Host with a Fermionic Dark Matter Core-Halo Distribution

• URL: http://arxiv.org/abs/2404.19102v1
• Date: Mon, 29 Apr 2024 20:46:16 GMT
• Title: Modelling the Track of the GD-1 Stellar Stream Inside a Host with a Fermionic Dark Matter Core-Halo Distribution
• Authors: Martín F. Mestre, Carlos R. Argüelles, Daniel D. Carpintero, Valentina Crespi, Andreas Krut,
• Abstract summary: A Maximum Entropy Principle of halo formation has been applied to provide a DM halo model. This work provides evidence that the fermionic profile is a reliable model for both the massive central object and the DM of the Galaxy.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Traditional studies on stellar streams typically involve phenomenological $\Lambda$CDM halos or ad hoc dark matter (DM) profiles with different degrees of triaxiality, which preclude to gain insights into the nature and mass of the DM particles. Recently, a Maximum Entropy Principle of halo formation has been applied to provide a DM halo model which incorporates the fermionic (quantum) nature of the particles, while leading to DM profiles which depend on the fermion mass. Such profiles develop a more general dense core - diluted halo morphology able to explain the Galactic rotation curve, while the degenerate fermion core can mimic the central massive black hole (BH). We attempt to model the GD-1 stellar stream using a spherical core-halo DM distribution for the host, which, at the same time, explains the dynamics of the S-cluster stars through its degenerate fermion-core with no central BH. We used two optimization algorithms in order to fit both the initial conditions of the stream orbit and the fermionic model. The stream observables are 5D phase-space data from the Gaia DR2 survey. We were able to find good fits for both the GD-1 stream and the S-stars for a family of fermionic core-halo profiles parameterized by the fermion mass. This work provides evidence that the fermionic profile is a reliable model for both the massive central object and the DM of the Galaxy. Remarkably, this model predicts a total MW mass of $2.3\times 10^{11}M_{\odot}$ which is in agreement with recent mass estimates obtained from Gaia DR3 rotation curves (Gaia RC). In summary, with one single fermionic model for the DM distribution of the MW, we obtain a good fit in three totally different distance scales of the Galaxy: $\sim 10^{-6}$ kpc (central, S-stars), $\sim14$ kpc (mid, GD-1) and $\sim 30$ kpc (boundary, Gaia RC mass estimate).

Related papers

• A tractable model of monitored fermions with conserved $\mathrm{U}(1)$ charge [0.0]
  We study measurement-induced phases of free fermion systems with U(1) symmetry. We derive a field theory description for the purity and bipartite entanglement at large space and time scales.
  arXiv  Detail & Related papers  (2024-07-10T20:53:47Z)
• Existence of quantum states for Klein-Gordon particles based on exact and approximate scenarios with pseudo-dot spherical confinement [0.0]
  It is shown how confluent hypergeometric functions have principal quantum numbers for considered spatial confinement. The findings related to the relativistic eigenvalues of the Klein-Gordon particle moving spherical space show the dependence of mass distribution.
  arXiv  Detail & Related papers  (2023-07-11T15:09:56Z)
• Theory of free fermions under random projective measurements [43.04146484262759]
  We develop an analytical approach to the study of one-dimensional free fermions subject to random projective measurements of local site occupation numbers. We derive a non-linear sigma model (NLSM) as an effective field theory of the problem.
  arXiv  Detail & Related papers  (2023-04-06T15:19:33Z)
• Study of the long-range transverse field Ising model with fermionic Gaussian states [0.0]
  We numerically study the one-dimensional long-range Transverse Field Ising Model (TFIM) in the antiferromagnetic regime at zero temperature. The spin-spin interaction extends to all spins in the lattice and decays as $1/ralpha$, where $r$ denotes the distance between two spins and $alpha$ is a tunable exponent.
  arXiv  Detail & Related papers  (2023-01-07T21:23:53Z)
• Neural Inference of Gaussian Processes for Time Series Data of Quasars [72.79083473275742]
  We introduce a new model that enables it to describe quasar spectra completely. We also introduce a new method of inference of Gaussian process parameters, which we call $textitNeural Inference$. The combination of both the CDRW model and Neural Inference significantly outperforms the baseline DRW and MLE.
  arXiv  Detail & Related papers  (2022-11-17T13:01:26Z)
• Universal features of entanglement entropy in the honeycomb Hubbard model [44.99833362998488]
  This paper introduces a new method to compute the R'enyi entanglement entropy in auxiliary-field quantum Monte Carlo simulations. We demonstrate the efficiency of this method by extracting, for the first time, universal subleading logarithmic terms in a two dimensional model of interacting fermions.
  arXiv  Detail & Related papers  (2022-11-08T15:52:16Z)
• Full-band Monte Carlo simulation of two-dimensional electron gas in (Al$_{x}$Ga$_{1-x}$)$_{2}$O$_{3}$/Ga$_{2}$O$_{3}$ heterostructures [7.489793155793319]
  Gallium Oxide is an extensively investigated ultrawide-bandgap semiconductor for potential applications in power electronics and RF switching. The high field electron transport in the 2DEG is explored in this work based on the first principles calculated parameters. The motion of electrons in the 2DEG and the bulk is treated through an integrated Monte Carlo program.
  arXiv  Detail & Related papers  (2022-06-13T18:22:53Z)
• Deep Learning Models of the Discrete Component of the Galactic Interstellar Gamma-Ray Emission [61.26321023273399]
  A significant point-like component from the small scale (or discrete) structure in the H2 interstellar gas might be present in the Fermi-LAT data. We show that deep learning may be effectively employed to model the gamma-ray emission traced by these rare H2 proxies within statistical significance in data-rich regions.
  arXiv  Detail & Related papers  (2022-06-06T18:00:07Z)
• Satellite galaxy abundance dependency on cosmology in Magneticum simulations [101.18253437732933]
  We build an emulator of satellite abundance based on cosmological parameters. We find that $A$ and $beta$ depend on cosmological parameters, even if weakly. We also show that satellite abundance cosmology dependency differs between full-physics (FP) simulations, dark-matter only (DMO) and non-radiative simulations.
  arXiv  Detail & Related papers  (2021-10-11T18:00:02Z)
• Compactified Spacelike Extra Dimension & Brane-Higgs Field [0.0]
  In the paradigm with a small warped Spacelike Extra Dimensions (SED), the Higgs field is in general localized at a boundary of the SED. If the SM gauge bosons and fermions propagate into the warped SED, one can generate the mass hierarchy for fermions. The first part of the thesis is devoted to the treatment of brane localized mass terms for 5D fermions. The second part consists in applying different methods to various brane localized terms.
  arXiv  Detail & Related papers  (2020-05-01T10:08:27Z)
• Non-Hermitian extension of the Nambu--Jona-Lasinio model in 3+1 and 1+1 dimensions [68.8204255655161]
  We present a non-Hermitian PT-symmetric extension of the Nambu--Jona-Lasinio model of quantum chromodynamics in 3+1 and 1+1 dimensions. We find that in both cases, in 3+1 and in 1+1 dimensions, the inclusion of a non-Hermitian bilinear term can contribute to the generated mass.
  arXiv  Detail & Related papers  (2020-04-08T14:29:36Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.