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AKARI IRC survey of the Large Magellanic Cloud: A new feature in the infrared color—magnitude diagram

  • Yoshifusa Ita (a1), Takashi Onaka (a2), Daisuke Kato (a2) and the AKARI LMC survey team

Abstract

We observed an area of 10 deg2 of the Large Magellanic Cloud using the Infrared Camera on board AKARI. The observations were carried out using five imaging filters (3, 7, 11, 15, and 24 μm) and a dispersion prism (2 − 5 μm, λ/Δλ ~ 20) equipped in the IRC. The 11 and 15 μm data, which are unique to AKARI IRC, allow us to construct color-magnitude diagrams that are useful to identify stars with circumstellar dust. We found a new sequence in the color-magnitude diagram, which is attributed to red giants with luminosity fainter than that of the tip of the first red giant branch. We suggest that this sequence is likely to be related to the broad emission feature of aluminium oxide at 11.5 μm.

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Copyright

COPYRIGHT: © International Astronomical Union 2009

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AKARI IRC survey of the Large Magellanic Cloud: A new feature in the infrared color—magnitude diagram

  • Yoshifusa Ita (a1), Takashi Onaka (a2), Daisuke Kato (a2) and the AKARI LMC survey team

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