Published in "Outskirts of Galaxies", Astrophysics and Space Science Library, Volume 434. ISBN 978-3-319-56569-9. Springer International Publishing AG, 2017, p. 31.
https://arxiv.org/abs/1612.05471v1

For a PDF version of the article, click here.

RESOLVED STELLAR POPULATIONS AS TRACERS OF OUTSKIRTS

Denija Crnojević


Texas Tech University, Department of Physics and Astronomy, Box 41051, Lubbock, TX 79409, USA


Abstract: Galaxy haloes contain fundamental clues about the galaxy formation and evolution process: hierarchical cosmological models predict haloes to be ubiquitous, and to be (at least in part) the product of past merger and/or accretion events. The advent of wide-field surveys in the last two decades has revolutionized our view of our own Galaxy and its closest “sister”, Andromeda, revealing copious tidal streams from past and ongoing accretion episodes, as well as doubling the number of their known faint satellites. The focus shall now be shifted to galaxy haloes beyond the Local Group: resolving individual stars over significant areas of galaxy haloes will enable estimates of their ages, metallicities and gradients. The valuable information collected for galaxies with a range of masses, morphologies and within diverse environments will ultimately test and quantitatively inform theoretical models of galaxy formation, and shed light onto the many challenges faced by simulations on galactic scales.


Table of Contents

THE IMPORTANCE OF HALOES
Resolved Stellar Populations
The Low-mass End of the Galaxy Luminosity Function

LOCAL GROUP
Milky Way
The Emergence of Streams
The Smooth Halo Component
Dwarf Satellites
M31 (Andromeda)
Streams and Substructures
Smooth Halo
Andromeda Satellites
Low-mass Galaxies In and Around the Local Group

BEYOND THE LOCAL GROUP
Systematic Studies
Panoramic Views of Individual Galaxies
NGC 891
M81
NGC 253
NGC 5128 (Centaurus A)

SUMMARY AND FUTURE PROSPECTS

REFERENCES

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