Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Disks with Jet, ADAF, or EDAF for Sgr A*   We investigate various models of accretion disks for Sgr A*, one of the most
puzzling sources in the Galaxy. The generic image we have taken into account
consists of a black hole, an accretion disk, and a jet. Various accretion
models are able to explain the low NIR flux of Sgr A*: a standard accretion
disk with a jet, an ADAF, or an EDAF (Ejection Dominated Accretion Flow) model.
We find that all of these models are conceptually similar. The accretion model
which allows the formation of the jet at the innermost edge of the disk
requires a sub-keplerian gas motion and a very large base of the jet. The large
base of the jet may be unrealistic for Sgr A*, since the jet model and the
observations suggest that the jet is collimated and anchored in the disk in a
very narrow region of the disk close to the black hole. Alternatively, one can
think of a jet plus wind model (EDAF), where most of the energy goes out
without being dissipated in the disk. The model resembles the ADAF model at
small radii. At large radii the energy is ejected by a wind.

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The categories of this paper are: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: eess
23
The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ph
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The categories of this paper are: physics
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The categories of this paper are: gr-qc