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Substructures of dark matter halo, called subhalos, provide important clues to understand the nature of dark matter. We construct a useful model to describe the properties of subhalo mass functions based on the well-known analytical…

Cosmology and Nongalactic Astrophysics · Physics 2022-10-26 Nagisa Hiroshima , Shin'ichiro Ando , Tomoaki Ishiyama

The evolution and fate of very massive stars (VMS) is tightly connected to their mass-loss properties. Their initial and final masses differ significantly as a result of mass loss. VMS have strong stellar winds and extremely high ionising…

(shortened) The first couple of stellar generations may have been massive, of order 100 Msun, and to have played a dominant role in galaxy formation and the chemical enrichment of the early Universe. Some fraction of these objects may have…

Solar and Stellar Astrophysics · Physics 2015-06-11 Lianne Muijres , Jorick S. Vink , A. de Koter , R. Hirschi , N. Langer , S. -C. Yoon

With this Paper we complete a comprehensive study of substructure in dark matter haloes. In Paper I we derived the radial distribution and mass function (MF) of accreted subhaloes (scaled to the radius and mass of the host halo) and showed…

Cosmology and Nongalactic Astrophysics · Physics 2022-01-19 Eduard Salvador-Solé , Alberto Manrique , David Canales , Ignacio Botella

The non-spherical shapes of dark matter and gas distributions introduce systematic uncertainties that affect observable-mass relations and selection functions of galaxy groups and clusters. However, the triaxial gas distributions depend on…

Cosmology and Nongalactic Astrophysics · Physics 2022-01-19 Luis Fernando Machado Poletti Valle , Camille Avestruz , David J. Barnes , Arya Farahi , Erwin T. Lau , Daisuke Nagai

On the scale of galactic haloes, the distribution of matter in the cosmos is affected by energetic, non-gravitational processes; so-called baryonic feedback. A lack of knowledge about the details of how feedback processes redistribute…

Cosmology and Nongalactic Astrophysics · Physics 2020-09-23 A. J. Mead , T. Tröster , C. Heymans , L. Van Waerbeke , I. G. McCarthy

The orbits of short-period exoplanets are sculpted by tidal dissipation. However, the mechanisms and associated efficiencies of these tidal interactions are poorly constrained. We present robust constraints on the tidal quality factors of…

Earth and Planetary Astrophysics · Physics 2025-01-17 Sarah C. Millholland , Morgan MacLeod , Felicia Xiao

We provide constraints on the accuracy with which the neutrino mass fraction, $f_{\nu}$, can be estimated when exploiting measurements of redshift-space distortions, describing in particular how the error on neutrino mass depends on three…

Cosmology and Nongalactic Astrophysics · Physics 2016-08-17 Fernanda Petracca , Federico Marulli , Lauro Moscardini , Andrea Cimatti , Carmelita Carbone , Raul E. Angulo

Distribution of galaxies may be a biased tracer of the dark matter distribution and the relation between the galaxies and the total mass may be stochastic, non-linear and time-dependent. Since many observations of galaxy clustering will be…

Astrophysics · Physics 2009-10-31 Atsushi Taruya

N-body simulations have revealed a wealth of information about dark matter halos however their results are largely empirical. Using analytic means, we attempt to shed light on simulation results by generalizing the self-similar secondary…

Cosmology and Nongalactic Astrophysics · Physics 2010-12-23 Phillip Zukin , Edmund Bertschinger

Determining the dynamical mass profiles of dispersion-supported galaxies is particularly challenging due to projection effects and the unknown shape of their velocity anisotropy profile. Our goal is to develop a machine learning algorithm…

We study the rate of escape of stars (``evaporation'') from tidally-limited postcollapse globular clusters having a power-law distribution of stellar masses. We use a multi-mass Fokker-Planck code and assume a steady tidal field.…

Astrophysics · Physics 2007-05-23 Hyung Mok Lee , Jeremy Goodman

Recent observational results show that very low mass stars and brown dwarfs are able to host close-in rocky planets. Low-mass stars are the most abundant stars in the Galaxy and the formation efficiency of their planetary systems is…

Earth and Planetary Astrophysics · Physics 2020-05-20 Mariana B. Sánchez , Gonzalo C. de Elía , Juan José Downes

We measure the mass function of dark matter halos in a large set of collisionless cosmological simulations of flat LCDM cosmology and investigate its evolution at z<~2. Halos are identified as isolated density peaks, and their masses are…

The halo mass function (HMF) is fundamental for interpreting the number counts of galaxy clusters, serving as a pivotal theoretical tool in cosmology. With the advent of high-precision surveys such as LSST, eROSITA, DESI, and Euclid,…

Cosmology and Nongalactic Astrophysics · Physics 2025-05-21 Tiago Castro , Stefano Borgani , Jeppe Dakin

[abridged] We present a unified picture for the evolution of star clusters on the two-body relaxation timescale. We use direct N-body simulations of star clusters in a galactic tidal field starting from different multi-mass King models, up…

Astrophysics of Galaxies · Physics 2014-11-20 Michele Trenti , Enrico Vesperini , Mario Pasquato

The chemical enrichment of the Universe; the mass spectrum of planetary nebulae, white dwarfs and gravitational wave progenitors; the frequency distribution of Type I and II supernovae; the fate of exoplanets ... a multitude of phenomena…

Solar and Stellar Astrophysics · Physics 2021-10-05 Leen Decin

We investigate 3D density and weak lensing profiles of dark matter haloes predicted by a cosmology-rescaling algorithm for $N$-body simulations. We extend the rescaling method of Angulo & White (2010) and Angulo & Hilbert (2015) to improve…

Cosmology and Nongalactic Astrophysics · Physics 2018-07-04 Malin Renneby , Stefan Hilbert , Raúl E. Angulo

In previous papers of this series, we developed a new algorithm for modeling the formation of star clusters in galaxy formation simulations. Here we investigate how dissolution of bound star clusters affects the shape of the cluster mass…

Astrophysics of Galaxies · Physics 2019-05-21 Hui Li , Oleg Y. Gnedin

We investigate the loss rates of the hydrogen atmospheres of terrestrial planets with a range of masses and orbital distances by assuming a stellar extreme ultraviolet (EUV) luminosity that is 100 times stronger than that of the current…

Earth and Planetary Astrophysics · Physics 2016-04-27 N. V. Erkaev , H. Lammer , P. Odert , K. G. Kislyakova , C. P. Johnstone , M. Güdel , M. L. Khodachenko