| DOI | Resolve DOI: https://doi.org/10.1093/mnras/stw652 |
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| Author | Search for: Rafiei Ravandi, Masoud; Search for: Barmby, Pauline; Search for: Ashby, Matthew L. N.; Search for: Laine, Seppo; Search for: Davidge, T. J.1; Search for: Zhang, Jenna; Search for: Bianchi, Luciana; Search for: Babul, Arif; Search for: Chapman, S. C. |
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| Name affiliation | - National Research Council of Canada. National Science Infrastructure
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| Format | Text, Article |
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| Subject | Individual galaxies; M31; spiral galaxies; stellar content; infrared galaxies |
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| Abstract | We present the first results from an extended survey of the Andromeda galaxy (M31) using 41.1 h of observations by Spitzer-IRAC at 3.6 and 4.5 µm. This survey extends previous observations to the outer disc and halo, covering total lengths of 4°.4 and 6°.6 along the minor and major axes, respectively. We have produced surface brightness profiles by combining the integrated light from background-corrected maps with stellar counts from a new catalogue of point sources. Using auxiliary catalogues, we have carried out a statistical analysis in colour–magnitude space to discriminate M31 objects from foreground Milky Way stars and background galaxies. The catalogue includes 426 529 sources, of which 66 per cent have been assigned probability values to identify M31 objects with magnitude depths of [3.6] = 19.0 ± 0.2, [4.5] = 18.7 ± 0.2. We discuss applications of our data for constraining the stellar mass and characterizing point sources in the outer radii. |
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| Publication date | 2016-03-20 |
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| Publisher | Oxford University Press |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 23000382 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 3c4f4a72-f7c3-4888-82a6-02eedcb2b474 |
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| Record created | 2016-07-12 |
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| Record modified | 2020-03-16 |
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