ARRAKIHS: The observability of tidally stripped satellites in a Milky Way-like halo

@misc{perezherrero2026arrakihs,
  title = {{ARRAKIHS: The observability of tidally stripped satellites in a Milky Way-like halo}},
  author = {Abram Pérez-Herrero and Y. Revaz and S. Roca-Fàbrega and S. T. Nagesh and J. Preston and D. Erkal and D. Herranz Muñoz and O. Agertz and M. Akhlaghi and R. Bieri and A. Camazón-Pinilla and J. Cenarro and A. P. Cooper and H. Domínguez Sánchez and A. Fattahi and R. Feldmann and A. Font and M. A. Gómez-Flechoso and E. Gaztañaga and M. Güdel and R. Guzmán and E. Illés and R. Infante-Sainz and C. Kintziger and A. Marín-Franch and D. Martínez-Delgado and B. Moore and K. Nagamine and P. Papaderos and P. Renard Guiral and A. H. Riley and R. Rodríguez-Cardoso and S. Serrano and S. Shen and E. Sola and F. Torradeflot and M. Wiesmann},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.38779},
  eprint = {2610.38779},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.38779},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - ARRAKIHS: The observability of tidally stripped satellites in a Milky Way-like halo
AU  - Abram Pérez-Herrero
AU  - Y. Revaz
AU  - S. Roca-Fàbrega
AU  - S. T. Nagesh
AU  - J. Preston
AU  - D. Erkal
AU  - D. Herranz Muñoz
AU  - O. Agertz
AU  - M. Akhlaghi
AU  - R. Bieri
AU  - A. Camazón-Pinilla
AU  - J. Cenarro
AU  - A. P. Cooper
AU  - H. Domínguez Sánchez
AU  - A. Fattahi
AU  - R. Feldmann
AU  - A. Font
AU  - M. A. Gómez-Flechoso
AU  - E. Gaztañaga
AU  - M. Güdel
AU  - R. Guzmán
AU  - E. Illés
AU  - R. Infante-Sainz
AU  - C. Kintziger
AU  - A. Marín-Franch
AU  - D. Martínez-Delgado
AU  - B. Moore
AU  - K. Nagamine
AU  - P. Papaderos
AU  - P. Renard Guiral
AU  - A. H. Riley
AU  - R. Rodríguez-Cardoso
AU  - S. Serrano
AU  - S. Shen
AU  - E. Sola
AU  - F. Torradeflot
AU  - M. Wiesmann
PY  - 2026
DA  - 2026/10/28
PB  - arXiv
DO  - 10.48550/arxiv.2610.38779
UR  - https://arxiv.org/abs/2610.38779
AB  - Deep imaging surveys are revealing increasing numbers of low surface brightness stellar streams around Milky Way-like galaxies. These streams trace the orbital evolution and internal structure of their disrupted dwarf galaxy progenitors. We investigate the evolution and observability of tidal features from dwarf galaxies consistent with the ΛCDM framework and Local Group observations. We performed high-resolution N-body simulations of dwarf galaxies orbiting in a static Milky Way-like potential comprising a disc, bulge, and dark matter halo. Each dwarf comprised a Plummer stellar distribution embedded in a cuspy or cored generalised Navarro--Frenk--White dark matter halo. Idealised integrated surface brightness maps were constructed every 0.5 Gyr over 10 Gyr, and detectability was quantified through the projected area of stellar light brighter than limiting surface brightnesses, μ_lim=29--$32$ mag arcsec^−2, chosen to span depths relevant to ARRAKIHS, LSST, and Euclid. The detectability of tidal features depends most strongly on progenitor stellar mass, orbital configuration, parameterised by the eccentricity proxy e_0, and evolutionary stage. Across this range, extended tidal debris is predominantly recovered for initially more radial configurations, mainly those with e_0 ≳ 0.75. In the simulated grid, detectable area is dominated by M_⋆=10^8--10^9 M_⊙ progenitors, whereas M_⋆=10^6--10^7 M_⊙ systems can undergo stripping without detectable debris. The detectable area evolves non-monotonically with time, reflecting the competition between stream formation, phase mixing, and the fading of diffuse debris below the adopted surface brightness limits. Cuspy and cored progenitors show similar evolution of the detectable area, with differences smaller than the scatter induced by orbital diversity.
ER  -