Other
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006noao.prop..555n&link_type=abstract
NOAO Proposal ID #2006B-0555
Other
Scientific paper
Despite extensive coverage, previous surveys of the Large Magellanic Cloud (LMC) have yet to detect a classical LMC halo like those known around the Milky Way and M31. However, using Washington+DDO51 photometry and spectroscopy, we have discovered an extended population of LMC stars separated by 20 kpc from its center. To investigate whether these LMC stars, lying two times farther out than any previous known LMC stars, are part of a previously unknown stellar tidal tail or a previously unknown LMC halo we have recently used the CTIO 4m+Mosaic to carry out an extensive new photometric survey of the LMC periphery. The use of Washington+DDO51 photometry allows us to discover very diffuse structures that are otherwise difficult to find. Here, we propose follow-up spectroscopy of LMC giant star candidates from this new photometric database out to 30 kpc from the LMC center. This proposed study plans to answer many outstanding questions about the LMC: (1) Does this late type spiral (SBm) have a halo like other Local Group spirals? (2) Is there a stellar component to the HI Magellanic Stream? (3) What are the chemical and dynamical properties of this new LMC structure? (4) What do they tell us about the mass of the LMC and its interaction with the Milky Way?
Kunkel William E.
Majewski Steven R.
Munoz Ricardo R.
Nidever David
Patterson Richard J.
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