Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Origin of non-unique deprojection of the Galactic bar   Non-uniqueness of deprojecting the integrated light distribution of a nearby
or faraway triaxial body is reviewed in the context of deriving the volume
density of the Galactic bar from the COBE/DIRBE maps of the Galactic plane. The
exact origin of this non-uniqueness is studied. One can write down a sequence
of triaxial bar models which appear identical in integrated light from the
Sun's perspective, and the whole sequence is mapped out as a function of the
Galactocentric distance of the observer from galactic to extragalactic distance
scales. While mirror symmetries and perspective effects are compatible with any
orientation of the bar in the sequence, weak upper and lower bounds can still
be placed on the angles and axis ratios of the bar by positivity and other
general requirements. Star count data of bulge giants are ideal for selecting a
unique model from the sequence.

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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: bayes-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-th
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The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an