Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (154) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (30)
· Also-Read Articles (Reads History)
· Translate This Page
Origin of the excitation of the galactic center
Rieke, G. H.; Rieke, M. J.; Paul, A. E.
AA(Steward Observatory, Tucson, AZ), AB(Steward Observatory, Tucson, AZ), AC(Arizona, University, Tucson, AZ)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 15, 1989, p. 752-761. Research supported by NSF. (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Astronomical Spectroscopy, Galactic Nuclei, Infrared Sources (Astronomy), Milky Way Galaxy, Charge Coupled Devices, Interstellar Extinction, Luminosity, Radio Sources (Astronomy), Star Clusters
Bibliographic Code:


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.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences

More Article Retrieval Options

HELP for Article Retrieval

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
arXiv e-prints