Origin of the excitation of the galactic center

Details Origin of the excitation of the galactic center Origin of the excitation of the galactic center

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...336..752r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 15, 1989, p. 752-761. Research supported by NSF.

Astronomy and Astrophysics

Astronomy

143

Astronomical Spectroscopy, Galactic Nuclei, Infrared Sources (Astronomy), Milky Way Galaxy, Charge Coupled Devices, Interstellar Extinction, Luminosity, Radio Sources (Astronomy), Star Clusters

Scientific paper

Near-infrared imaging and spectroscopy of the infrared cluster in the central parsec of the galaxy have been obtained. Very-high resolution images of IRS 16 allow an upper limit of 10 percent to be placed to the contribution to the energetics in this region by Sgr A-asterisk. However, the very blue colors of at least five components of IRS 16 suggest that they together could power the region. A deep image at 1.25 micron detects at least three of the sources bright at 10 micron, demonstrating that these objects contain self-luminous cores. Constraints on the temperatures of these cores are placed with infrared spectroscopy, and they appear to be too hot and bright in the near-infrared to be single stars. These cores may also contribute significantly to the overall luminosity of the central parsec.

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