The cusp-core problem in gas-poor dwarf spheroidal galaxies

Autor: Pierre Boldrini

This review deals with the inconsistency of inner dark matter density profiles in dwarf galaxies, known as the cusp-core problem. Particularly, we aim to focus on gas-poor dwarf galaxies. One of the most promising solutions to this cold dark matter s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbe94e572717cf2f1b491ea36a5fe91f
http://arxiv.org/abs/2201.01056

Absence of obvious tidal tails around the globular cluster NGC 6397

Autor: Pierre Boldrini, Eduardo Vitral

Publikováno v: Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2021, 507 (2), pp.1814-1826. ⟨10.1093/mnras/stab2035⟩

In this work, we use $N-$body simulations performed on GPU to trace the past 10 Gyr dynamical history of a globular cluster (GC) similar to NGC~6397 in the tidal field of a Milky Way-like galaxy and we compare our simulated GCs with data from the thi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78f55b4f9db348a8b5f9b8af41d80543
https://hal.archives-ouvertes.fr/hal-03203639

The origin of the black hole offset in M31

Autor: Pierre Boldrini

Using state-of-the-art high-resolution fully GPU N-body simulations, we demonstrate for the first time that the infall of a dark matter rich satellite naturally explains a present black hole offset by sub-parsecs in M31. Observational data of the tid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4b50c57961b814932fc8553d45390d8
http://arxiv.org/abs/2007.03010

Subhalo sinking and off-center massive black holes in dwarf galaxies

Autor: Pierre Boldrini, Joseph Silk, Roya Mohayaee

Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 495 (1), pp.L12-L16. ⟨10.1093/mnrasl/slaa043⟩

Using fully GPU $N$-body simulations, we demonstrate for the first time that subhalos sink and transfer energy via dynamical friction into the centres of dwarf galaxies. This dynamical heating kicks any central massive black hole (MBH) out to tens of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6fd891a2a42c2d7937ef2c30f643ffaf
http://arxiv.org/abs/2003.02611

Cusp-to-core transition in low-mass dwarf galaxies induced by dynamical heating of cold dark matter by primordial black holes

Autor: Joseph Silk, Alexandre Arbey, Roya Mohayaee, Pierre Boldrini, Alexander Wagner, Yohei Miki

Publikováno v: Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2020, 492 (4), pp.5218-5225. ⟨10.1093/mnras/staa150⟩
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 492 (4), pp.5218-5225. ⟨10.1093/mnras/staa150⟩

We performed a series of high-resolution $N$-body simulations to examine whether dark matter candidates in the form of primordial black holes (PBHs) can solve the cusp-core problem in low-mass dwarf galaxies. If some fraction of the dark matter in lo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5abe027fa8a27bde1413e21b830e0542
https://hal.archives-ouvertes.fr/hal-02361924