21 citations · 93 across the 19 of their papers we have counts for
20 papers
Cold Dark Matter and Self-Interacting Dark Matter Interpretations of Cloud-9
Morgan Ohana, Xingyu Zhang, Hai-Bo Yu
Recently, the Five-hundred-meter Aperture Spherical Telescope discovered a gas-rich hydrogen cloud near M94 in the band. Lacking an optical counterpart, this object,…
SIDM and CDM interpretations of the million-solar-mass lensing perturber JVAS B1938+666-
Xingyu Zhang, Hai-Bo Yu
A object has recently been inferred from gravitational imaging of the strong-lensing system JVAS B1938+666, exhibiting an unusually dense inner region embedded with…
Gravothermal Collapse: Robust Against Baryonic Feedback
Demao Kong, Hai-Bo Yu
We perform a stress test of gravothermal collapse in self-interacting dark matter (SIDM) halos under baryonic feedback using a semi-analytical oscillating-potential model in contro…
Testing the isothermal Jeans model for self-interacting dark matter halos in the collapse phase
Shubo Li, Moritz S. Fischer, Zixiang Jia +3
We benchmark the semi-analytical isothermal Jeans model against a high-resolution isolated N-body simulation that follows a self-interacting dark matter (SIDM) halo into deep core…
The dark fate of ultra-faint dwarfs: Gravothermal collapse in action
Moritz S. Fischer, Hai-Bo Yu
Ultra-faint dwarf (UFD) galaxies are a promising probe for dark matter (DM) physics as they are the most DM-dominated systems known. The Milky Way (MW) hosts many UFDs for which th…
Black Hole Cold Brew: Fermi Degeneracy Pressure
Wei-Xiang Feng, Hai-Bo Yu, Yi-Ming Zhong
We investigate the dynamical instability of a self-gravitating thermal system in the quantum regime, where Fermi degeneracy pressure becomes significant. Using a truncated Fermi-Di…
Strong-lensing Perturber Signatures in Self-interacting Dark Matter Simulations
Demao Kong, Ethan O. Nadler, Hai-Bo Yu
Motivated by recent detections of low-mass perturbers in strong gravitational lensing systems, we investigate analogs of these objects in the Concerto suite, a set of cosmological…
Novel Challenges in Tracking Self-Interacting Dark Matter Subhalos
Demao Kong, Hai-Bo Yu, Ethan O. Nadler +2
Cosmological N-body simulations are among the primary tools for studying structure formation in the Universe. Analyses of these simulations critically depend on accurately identify…
Dark Bondi Accretion Aided by Baryons and the Origin of JWST Little Red Dots
Wei-Xiang Feng, Hai-Bo Yu, Yi-Ming Zhong
The gravothermal core collapse of self-interacting dark matter halos provides a mechanism for seeding supermassive black holes in the early Universe. We show that the collapse of a…
Accurately simulating core-collapse self-interacting dark matter halos
Moritz S. Fischer, Hai-Bo Yu, Klaus Dolag
The properties of satellite halos provide a promising probe for dark matter (DM) physics. Observations have motivated current efforts to explain surprisingly compact DM halos. If D…
SIDM Concerto: Compilation and Data Release of Self-interacting Dark Matter Zoom-in Simulations
Ethan O. Nadler, Demao Kong, Daneng Yang +1
We present SIDM Concerto: cosmological zoom-in simulations in cold dark matter (CDM) and self-interacting dark matter (SIDM) models based on the Symphony and Milky Way-est sui…
Probing Signals of Self-Interacting Dark Matter Core Collapse in HI-Rich Galaxies
Demao Kong, Hai-Bo Yu
We analyze rotation curves of five HI-rich galaxies recently discovered with MeerKAT. These galaxies exhibit sharply rising rotation curves, while their baryonic components are not…
COZMIC. III. Cosmological Zoom-in Simulations of Self-interacting Dark Matter with Suppressed Initial Conditions
Ethan O. Nadler, Rui An, Daneng Yang +3
We present eight cosmological dark matter (DM)--only zoom-in simulations of a Milky Way--like system that include suppression of the linear matter power spectrum , and/or vel…
Relaxing Constraints on Dark Matter Annihilation Near the Supermassive Black Hole in M87
Mehrdad Phoroutan-Mehr, Hai-Bo Yu
The supermassive black hole at the center of M87 could redistribute dark matter particles within its sphere of influence, creating a high-density region known as a density spike. T…
The GD-1 stellar stream perturber as a core-collapsed self-interacting dark matter halo
Xingyu Zhang, Hai-Bo Yu, Daneng Yang +1
The GD-1 stellar stream exhibits spur and gap structures that may result from a close encounter with a dense substructure. When interpreted as a dark matter subhalo, the perturber…
Testing the parametric model for self-interacting dark matter using matched halos in cosmological simulations
Daneng Yang, Ethan O. Nadler, Hai-Bo Yu
We systemically evaluate the performance of the self-interacting dark matter (SIDM) halo model proposed in arXiv:2305.16176 with matched halos from high-resolution cosmological CDM…
CDM and SIDM Interpretations of the Strong Gravitational Lensing Object JWST-ER1
Demao Kong, Daneng Yang, Hai-Bo Yu
van Dokkum et al. (arXiv:2309.07969) reported the discovery of JWST-ER1, a strong lensing object at redshift , using data from the James Webb Space Telescope. The lens m…
SASHIMI-SIDM: Semi-analytical subhalo modelling for self-interacting dark matter at sub-galactic scales
Shin'ichiro Ando, Shunichi Horigome, Ethan O. Nadler +2
We combine the semi-analytical structure formation model, SASHIMI, which predicts subhalo populations in collisionless, cold dark matter (CDM), with a parametric model that maps CD…
Numerical challenges for energy conservation in N-body simulations of collapsing self-interacting dark matter halos
Moritz S. Fischer, Klaus Dolag, Hai-Bo Yu
Dark matter (DM) halos can be subject to gravothermal collapse if the DM is not collisionless, but engaged in strong self-interactions. When the scattering can efficiently transfer…
Self-interacting dark matter interpretation of Crater II
Xingyu Zhang, Hai-Bo Yu, Daneng Yang +1
The satellite galaxy Crater II of the Milky Way is extremely cold and exceptionally diffuse. These unusual properties are challenging to understand in the standard model of cold da…