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Chromospherically Active Stars in the RAVE Survey. II. Young dwarfs in the Solar neighborhood
M. Žerjal, T. Zwitter, G. Matijevič +19
A large sample of over 38,000 chromospherically active candidate solar-like stars and cooler dwarfs from the RAVE survey is addressed in this paper. An improved activity identifica…
The origin of the mass discrepancy-acceleration relation in CDM
Julio F. Navarro, Alejandro Benítez-Llambay, Azadeh Fattahi +5
We examine the origin of the mass discrepancy--radial acceleration relation (MDAR) of disk galaxies. This is a tight empirical correlation between the disk centripetal acceleration…
Tidal features of classical Milky Way satellites in a CDM universe
M. -Y. Wang, Azadeh Fattahi, Andrew P. Cooper +6
We use the APOSTLE cosmological hydrodynamic simulations to examine the effects of tidal stripping on cold dark matter (CDM) sub haloes that host three of the most luminous Milky W…
The selection function of the RAVE survey
Jennifer Wojno, Georges Kordopatis, Tilmann Piffl +23
We characterize the selection function of RAVE using 2MASS as our underlying population, which we assume represents all stars which could have potentially been observed. We evaluat…
Properties of Local Group galaxies in hydrodynamical simulations of sterile neutrino dark matter cosmologies
Mark R. Lovell, Sownak Bose, Alexey Boyarsky +10
We study galaxy formation in sterile neutrino dark matter models that differ signifi- cantly from both cold and from `warm thermal relic' models. We use the EAGLE code to carry out…
The PAndAS view of the Andromeda satellite system - II. Detailed properties of 23 M31 dwarf spheroidal galaxies
Nicolas F. Martin, Rodrigo A. Ibata, Geraint F. Lewis +15
We present a comprehensive analysis of the structural properties and luminosities of the 23 dwarf spheroidal galaxies that fall within the footprint of the Pan-Andromeda Archaeolog…
The Mass-Discrepancy Acceleration Relation: a Natural Outcome of Galaxy Formation in Cold Dark Matter halos
Aaron D. Ludlow, Alejandro Benitez-Llambay, Matthieu Schaller +8
We analyze the total and baryonic acceleration profiles of a set of well-resolved galaxies identified in the EAGLE suite of hydrodynamic simulations. Our runs start from the same i…
Barred galaxies in the EAGLE cosmological hydrodynamical simulation
David G. Algorry, Julio F. Navarro, Mario G. Abadi +8
We examine the properties of barred disc galaxies in a LCDM cosmological hydrodynamical simulation from the EAGLE project. Our study follows the formation of 269 discs identified a…
The oldest and most metal poor stars in the APOSTLE Local Group simulations
Else Starkenburg, Kyle A. Oman, Julio F. Navarro +5
We examine the spatial distribution of the oldest and most metal poor stellar populations of Milky Way-sized galaxies using the APOSTLE cosmological hydrodynamical simulations of t…
The RAVE-on catalog of stellar atmospheric parameters and chemical abundances for chemo-dynamic studies in the Gaia era
Andrew R. Casey, Keith Hawkins, David W. Hogg +24
The orbits, atmospheric parameters, chemical abundances, and ages of individual stars in the Milky Way provide the most comprehensive illustration of galaxy formation available. Th…
Shaken and Stirred: The Milky Way's Dark Substructures
Till Sawala, Pauli Pihajoki, Peter H. Johansson +4
The predicted abundance and properties of the low-mass substructures embedded inside larger dark matter haloes differ sharply among alternative dark matter models. Too small to hos…
RAVE stars in K2 - I. Improving RAVE red giants spectroscopy using asteroseismology from K2 Campaign 1
M. Valentini, C. Chiappini, G. R. Davies +29
We present a set of 87 RAVE stars with detected solar like oscillations, observed during Campaign 1 of the K2 mission (RAVE K2-C1 sample). This dataset provides a useful benchmark…
The cold dark matter content of Galactic dwarf spheroidals: no cores, no failures, no problem
Azadeh Fattahi, Julio F. Navarro, Till Sawala +5
We examine the dark matter content of satellite galaxies in Lambda-CDM cosmological hydrodynamical simulations of the Local Group from the APOSTLE project. We find excellent agreem…
Size matters: abundance matching, galaxy sizes, and the Tully-Fisher relation in EAGLE
Ismael Ferrero, Julio F. Navarro, Mario G. Abadi +7
The Tully-Fisher relation (TFR) links the stellar mass of a disk galaxy, , to its rotation speed: it is well approximated by a power law, shows little scatter, and evo…
The ISLAndS project II: The Lifetime Star Formation Histories of Six Andromeda dSphs
Evan D. Skillman, Matteo Monelli, Daniel R. Weisz +17
The Initial Star formation and Lifetimes of Andromeda Satellites (ISLAndS) project uses Hubble Space Telescope imaging to study a representative sample of six Andromeda dSph satell…
The low abundance and insignificance of dark discs in simulated Milky Way galaxies
Matthieu Schaller, Carlos S. Frenk, Azadeh Fattahi +3
We investigate the presence and importance of dark matter discs in a sample of 24 simulated Milky Way galaxies in the APOSTLE project, part of the EAGLE programme of hydrodynamic s…
The imprint of radial migration on the vertical structure of galaxy disks
Carlos Vera-Ciro, Elena D'Onghia, Julio F. Navarro
We use numerical simulations to examine the effects of radial migration on the vertical structure of galaxy disks. The simulations follow three exponential disks of different mass…
Identifying true satellites of the Magellanic Clouds
Laura V. Sales, Julio F. Navarro, Nitya Kallivayalil +1
The hierarchical nature of LCDM suggests that the Magellanic Clouds must have been surrounded by a number of satellites before their infall into the Milky Way. Many of those satell…
The Next Generation Virgo Cluster Survey (NGVS). XIII. The Luminosity and Mass Function of Galaxies in the Core of the Virgo Cluster and the Contribution from Disrupted Satellites
Laura Ferrarese, Patrick Cote, Ruben Sanchez-Janssen +21
We present measurements of the galaxy luminosity and stellar mass function in a 3.71 deg (0.3 Mpc) area in the core of the Virgo cluster, based on data from the Nex…
The ACS LCID Project XI. On the early time resolution of LG dwarf galaxy SFHs: Comparing the effects of reionization in models with observations
Antonio Aparicio, Sebastian L. Hidalgo, Evan Skillman +10
The analysis of the early star formation history (SFH) of nearby galaxies, obtained from their resolved stellar populations is relevant as a test for cosmological models. However,…
The ISLANDS project I: Andromeda XVI, An Extremely Low Mass Galaxy not Quenched by Reionization
Matteo Monelli, Clara E. Martínez-Vázquez, Edouard J. Bernard +14
Based on data aquired in 13 orbits of HST time, we present a detailed evolutionary history of the M31 dSph satellite Andromeda XVI, including its life-time star formation history,…
Chemical separation of disc components using RAVE
Jennifer Wojno, Georges Kordopatis, Matthias Steinmetz +17
We present evidence from the RAdial Velocity Experiment (RAVE) survey of chemically separated, kinematically distinct disc components in the solar neighbourhood. We apply probabili…
Knowing the unknowns: uncertainties in simple estimators of galactic dynamical masses
David J. R. Campbell, Carlos S. Frenk, Adrian Jenkins +7
The observed stellar kinematics of dispersion-supported galaxies are often used to measure dynamical masses. Recently, several analytical relationships between the stellar line-of-…
The low-mass end of the baryonic Tully-Fisher relation
Laura V. Sales, Julio F. Navarro, Kyle Oman +11
The scaling of disk galaxy rotation velocity with baryonic mass (the "Baryonic Tully-Fisher" relation, BTF) has long confounded galaxy formation models. It is steeper than the M ~…