Stellar haloes of disc galaxies at z~1

Abstract

Taking advantage of the ultra-deep near-infrared imaging obtained with the Hubble Space Telescope on the Hubble Ultra Deep Field, we detect and explore for the first time the properties of the stellar haloes of two Milky Way-like galaxies at z~1. We find that the structural properties of those haloes (size and shape) are similar to the ones found in the local universe. However, these high-z stellar haloes are approximately three magnitudes brighter and exhibit bluer colours ((g-r)<0.3 mag) than their local counterparts. The stellar populations of z~1 stellar haloes are compatible with having ages <1 Gyr. This implies that the stars in those haloes were formed basically at 1<z<2. This result matches very well the theoretical predictions that locate most of the formation of the stellar haloes at those early epochs. A pure passive evolutionary scenario, where the stellar populations of our high-z haloes simply fade to match the stellar halo properties found in the local universe, is consistent with our data.

14 pages, 14 figures. Accepted in MNRAS. Replaced to match the published version

References in corpus (18)

• The Hubble Ultra Deep Field
• Evolutionary Stellar Population Synthesis with MILES. Part I: The Base Models and a New Line Index System
• The stellar mass assembly of galaxies from z=0 to z=4. Analysis of a sample selected in the rest-frame near-infrared with Spitzer
• The accretion origin of the Milky Way's stellar halo
• The Haunted Halos of Andromeda and Triangulum: A panorama of galaxy formation in action
• The structure of galactic disks: Studying late-type spiral galaxies using SDSS
• The stellar halo of the Galaxy
• Color Profiles of Spiral Galaxies: Clues on Outer-Disk Formation Scenarios
• The Metal-Poor Halo of the Andromeda Spiral Galaxy (M31)
• The ghost of a dwarf galaxy: fossils of the hierarchical formation of the nearby spiral galaxy NGC 5907
• Discovery of a Giant Stellar Tidal Stream Around the Disk Galaxy NGC 4013
• Global Properties of M31's Stellar Halo from the SPLASH Survey. I. Surface Brightness Profile
• The stellar halo and outer disk of M33
• Color Profiles of Disk Galaxies since z~1: Probing Outer Disk Formation Scenarios
• An HST/ACS investigation of the spatial and chemical structure and sub-structure of NGC 891, a Milky Way analogue
• Cosmic Evolution of Stellar Disk Truncations: From z~1 to the Local Universe
• The Red Halo Phenomenon
• Deep Surface Brightness Profiles of Spiral Galaxies from SDSS Stripe82: Touching Stellar Halos

Cited by in corpus (24)

• Beyond 31 mag/arcsec^2: the low surface brightness frontier with the largest optical telescopes
• Stellar haloes of simulated Milky Way-like galaxies: Chemical and kinematic properties
• Stellar haloes in Milky-Way mass galaxies: From the inner to the outer haloes
• Census and classification of low-surface-brightness structures in nearby early-type galaxies from the MATLAS survey
• The Sloan Digital Sky Survey extended point spread functions
• The influence of diffuse scattered light II. Observations of galaxy haloes and thick discs and hosts of BCGs
• Stellar Halos in Illustris- Probing the Histories of Milky Way-Mass Galaxies
• Convergence of Lobatto-type Runge-Kutta methods for partitioned differential-algebraic systems of index 2
• The missing light of the Hubble Ultra Deep Field
• The cosmic assembly of stellar haloes in massive Early-Type Galaxies
• Stellar Disc Truncations and Extended Haloes in Face-on Spiral Galaxies
• Stellar haloes outshine disc truncations in low-inclined spirals
• Properties of extragalactic thick discs recovered from ultra-deep Stripe82 imaging
• Evolution of the anti-truncated stellar profiles of S0 galaxies since $z=0.6$ in the SHARDS survey: I - Sample and Methods
• Bulgeless disks, dark galaxies, inverted color gradients, and other expected phenomena at higher z. The chromatic surface brightness modulation (CMOD) effect
• Evolution of the anti-truncated stellar profiles of S0 galaxies since $z=0.6$ in the SHARDS survey: II - Structural and photometric evolution
• Probabilistic model for dynamic galaxy decomposition
• The Isophotal Structure of Star-forming Galaxies at $0.5<z<1.8$ in CANDELS: Implications for the Evolution of Galaxy Structure
• Low-metallicity stellar halo populations as tracers of dark matter haloes
• Extended Stellar Components of Galaxies & the Nature of Dark Matter
• Flares, Warps, Truncations, and Satellite: The Ultra-thin Galaxy UGC 11859
• Revealing the Warm and Hot Halo Baryons via Thomson Scattering of Quasar Light
• Untangling Stellar Components of Galaxies: Evaluation of Dynamical Decomposition Methods in Simulated Galaxies with GalaxyChop
• Redshift and stellar mass dependence of intrinsic shapes of disc-dominated galaxies from COSMOS observations below $z=1.0$