Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...261..119z&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 261, no. 1, p. 119-129.
Astronomy and Astrophysics
Astronomy
63
Accretion Disks, Black Holes (Astronomy), Infrared Spectroscopy, Point Sources, Radio Sources (Astronomy), Astronomical Maps, Bolometers, Interstellar Matter, Radio Spectra, Synchrotron Radiation
Scientific paper
New observations are presented of Sgr A* and its surroundings, made in 1989-1991 at 1300 and 870 micron wavelengths with the MPIfR He-3 cooled bolometer aboard the IRAM 30-m-Mm Radiotelescope. The observations support the steep increase with frequency of the Sgr A* spectrum at submm wavelengths. Previous observations at submm/IR wavelengths are used to derive the total mm/IR spectrum of Sgr A* and its immediate surroundings. The spectrum was found to contain three different Sgr A* components, 1, 2, and 3, which emit primarily in the cm/mm, in the submm/FIR, and in the NIR regions, respectively, in the central few arcseconds.
Lesch Harald
Mezger Peter G.
Zylka Robert
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