494 citations · 4.9k across the 67 of their papers we have counts for
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Cluster finding with outskirt stellar masses and percolation
Pablo Avalos, Conghao Zhou, Tesla Jeltema +5
The abundance of galaxy clusters is a powerful cosmological probe, but optical cluster cosmology is limited by selection systematics, in particular the projection effects that affe…
Relationship between 2D and 3D Galaxy Stellar Mass and Correlations with Halo Mass
Conghao Zhou, Alexie Leauthaud, Shuo Xu +8
Recent studies suggest that the stars in the outer regions of massive galaxies trace halo mass better than the inner regions and that an annular stellar mass provides a low scatter…
A Multi-Wavelength Technique for Estimating Galaxy Cluster Mass Accretion Rates
John Soltis, Michelle Ntampaka, Benedikt Diemer +7
The mass accretion rate of galaxy clusters is a key factor in determining their structure, but a reliable observational tracer has yet to be established. We present a state-of-the-…
A dynamics-based density profile for dark haloes -- III. Parameter space
Benedikt Diemer
In the previous paper of this series, we proposed a new function to fit halo density profiles out to large radii. This truncated Einasto profile models the inner, orbiting matter a…
Dynamics-based halo model for large scale structure
Edgar M. Salazar, Eduardo Rozo, Rafael García +4
Accurate modelling of the one-to-two halo transition has long been difficult to achieve. We demonstrate that physically motivated halo definitions that respect the bimodal phase-sp…
Haunted haloes: tracking the ghosts of subhaloes lost by halo finders
Benedikt Diemer, Peter Behroozi, Philip Mansfield
Dark matter subhaloes are key for the predictions of simulations of structure formation, but their existence frequently ends prematurely due to two technical issues, namely numeric…
What sets the splashback radius of dark matter haloes: accretion history or other properties?
Tae-hyeon Shin, Benedikt Diemer
The density profiles of dark matter haloes contain rich information about their growth history and physical properties. One particularly interesting region is the splashback radius…
A Better Way to Define Dark Matter Haloes
Rafael Garcia, Edgar Salazar, Eduardo Rozo +5
Dark matter haloes have long been recognized as one of the fundamental building blocks of large scale structure formation models. Despite their importance -- or perhaps because of…
A dynamics-based density profile for dark haloes -- II. Fitting function
Benedikt Diemer
The density profiles of dark matter haloes are commonly described by fitting functions such as the NFW or Einasto models, but these approximations break down in the transition regi…
A dynamics-based density profile for dark haloes. I. Algorithm and basic results
Benedikt Diemer
The density profiles of dark matter haloes can potentially probe dynamics, fundamental physics, and cosmology, but some of the most promising signals reside near or beyond the viri…
Beyond Mass: Detecting Secondary Halo Properties with Galaxy-Galaxy Lensing
Enia Xhakaj, Alexie Leauthaud, Johannes Lange +3
Secondary halo properties beyond mass, such as the mass accretion rate (MAR), concentration, and the half mass scale, are essential in understanding the formation of large-scale st…
TheHaloMod: An online calculator for the halo model
Steven G. Murray, Benedikt Diemer, Zhaoting Chen +5
The halo model is a successful framework for describing the distribution of matter in the Universe -- from weak lensing observables to galaxy 2-point correlation functions. We revi…
Flybys, orbits, splashback: subhalos and the importance of the halo boundary
Benedikt Diemer
The classification of dark matter halos as isolated hosts or subhalos is critical for our understanding of structure formation and the galaxy-halo connection. Most commonly, subhal…
Universal at last? The splashback mass function of dark matter halos
Benedikt Diemer
The mass function of dark matter halos is one of the most fundamental statistics in structure formation. Many theoretical models (such as Press-Schechter theory) are based on the n…
The splashback radius of halos from particle dynamics: III. Halo catalogs, merger trees, and host-subhalo relations
Benedikt Diemer
Virtually any investigation involving dark matter halos relies on a definition of their radius, mass, and of whether they are a subhalo. The halo boundary is most commonly defined…
Connecting the structure of dark matter haloes to the primordial power spectrum
Shaun T. Brown, Ian G. McCarthy, Benedikt Diemer +3
A large body of work based on collisionless cosmological N-body simulations going back over two decades has advanced the idea that collapsed dark matter haloes have simple and appr…
An accurate physical model for halo concentrations
Benedikt Diemer, Michael Joyce
The relation between halo mass, M, and concentration, c, is a critical component in our understanding of the structure of dark matter halos. While numerous models for this relation…
Ingredients for 21cm intensity mapping
Francisco Villaescusa-Navarro, Shy Genel, Emanuele Castorina +11
[Abridged] We study the abundance and clustering properties of HI at redshifts using TNG100, a large state-of-the-art magneto-hydrodynamic simulation of a 75 Mpc/h bo…
COLOSSUS: A python toolkit for cosmology, large-scale structure, and dark matter halos
Benedikt Diemer
This paper introduces Colossus, a public, open-source python package for calculations related to cosmology, the large-scale structure (LSS) of matter in the universe, and the prope…
The Immitigable Nature of Assembly Bias: The Impact of Halo Definition on Assembly Bias
Antonia S. Villarreal, Andrew R. Zentner, Yao-Yuan Mao +6
Dark matter halo clustering depends not only on halo mass, but also on other properties such as concentration and shape. This phenomenon is known broadly as assembly bias. We explo…
The splashback radius of halos from particle dynamics. II. Dependence on mass, accretion rate, redshift, and cosmology
Benedikt Diemer, Philip Mansfield, Andrey V. Kravtsov +1
The splashback radius , the apocentric radius of particles on their first orbit after falling into a dark matter halo, has recently been suggested as a physically motiv…
The splashback radius of halos from particle dynamics. I. The SPARTA algorithm
Benedikt Diemer
Motivated by the recent proposal of the splashback radius as a physical boundary of dark matter halos, we present a parallel computer code for Subhalo and PARticle Trajectory Analy…
Splashback Shells of Cold Dark Matter Halos
Philip Mansfield, Andrey V. Kravtsov, Benedikt Diemer
The density field in the outskirts of dark matter halos is discontinuous due to a caustic formed by matter at its first apocenter after infall. In this paper, we present an algorit…
Lensing Constraints on the Mass Profile Shape and the Splashback Radius of Galaxy Clusters
Keiichi Umetsu, Benedikt Diemer
The lensing signal around galaxy clusters can, in principle, be used to test detailed predictions for their average mass profile from numerical simulations. However, the intrinsic…