The DOI matches its Crossref record; 61 of the 61 references it cites were found in a registry or an index.
Evidence for Stellar Substructure in the Halo and Outer Disk of M31
Open accessAbstract
We report the discovery of significant stellar substructure in the halo and outer disk of our nearest large galactic neighbor, M31. Our deep panoramic survey with the Isaac Newton Telescope Wide Field Camera currently maps out an area of ≈25 deg 2 around M31, extending along the semimajor axis to 55 kpc and is the first to allow an uninterrupted study of the density and color distribution of individual red giant branch stars across a large fraction of the halo of an external spiral galaxy. We find evidence for both spatial density and metallicity (as inferred from color information) variations, which are often, but not always, correlated. In addition to the previously reported giant stellar stream, the data reveal the presence of significant stellar overdensities at large radii close to the southwestern major axis, in the proximity of the very luminous globular cluster G1, and near the northeastern major axis, coinciding with and extending beyond the previously known northern spur. The most prominent metallicity variations are found in the southern half of the halo, where two large structures with above average metallicites are apparent; one of these coincides with the giant stellar stream while the other corresponds to a much lower level stellar enhancement. Our findings contrast with, but do not conflict with, past studies of the M31 halo and outer disk that have suggested a rather homogeneous stellar population at large radius: the bulk of our newly detected substructure lies in the previously uncharted far outer regions of the galaxy. We discuss the possible origin of the substructure observed and the implications it has for constraining the galaxy assembly process.
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Cites
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Dark Matter Substructure within Galactic Halos
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Where Are the Missing Galactic Satellites?
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DWARF GALAXIES OF THE LOCAL GROUP
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The origin of dwarf galaxies, cold dark matter, and biased galaxy formation
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Self-citation
Cited by
Tracing Galaxy Formation with Stellar Halos. I. Methods
Bullock, J. S., & Johnston, K. V. (2005) · The Astrophysical Journal · doi:10.1086/497422 · Cited by 1,044
The remnants of galaxy formation from a panoramic survey of the region around M31
McConnachie, A. W., Irwin, M. J., Ibata, R. A., Dubinski, J., Widrow, L. M., Martin, N. F., Côté, P., Dotter, A. L., Navarro, J. F., Ferguson, A. M. N., et al. (2009) · Nature · doi:10.1038/nature08327 · Cited by 621
Self-citationGalactic stellar haloes in the CDM model
Cooper, A. P., Cole, S., Frenk, C. S., White, S. D. M., Helly, J., Benson, A. J., De Lucia, G., Helmi, A., Jenkins, A., Navarro, J. F., et al. (2010) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2010.16740.x · Cited by 594
Distances and metallicities for 17 Local Group galaxies
McConnachie, A. W., Irwin, M. J., Ferguson, A. M. N., Ibata, R. A., Lewis, G. F., & Tanvir, N. (2005) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2004.08514.x · Cited by 533
Self-citationThe Accretion Origin of the Milky Way’s Stellar Halo
Bell, E. F., Zucker, D. B., Belokurov, V., Sharma, S., Johnston, K. V., Bullock, J. S., Hogg, D. W., Jahnke, K., de Jong, J. T. A., Beers, T. C., et al. (2008) · The Astrophysical Journal · doi:10.1086/588032 · Cited by 444
Metadata
- Authors
- Ferguson, A. M. N., Irwin, M. J., Ibata, R. A., Lewis, G. F., & Tanvir, N. R.
- Venue
- The Astronomical Journal
- Publisher
- American Astronomical Society
- Published
- 2002-09
- Volume
- 124
- Issue
- 3
- Pages
- 1452-1463
- ISSN
- 0004-6256 (ISSN-L)
- 1538-3881
- OpenAlex
- W2130764799
- Cited by
- 416
- References
- 61
- FWCI
- 19.89
- Type
- journal article
- Language
- en
- Open access
- bronze
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