Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...260l..59r&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 260, Sept. 15, 1982, p. L59-L63.
Astronomy and Astrophysics
Astrophysics
6
Charge Coupled Devices, Galactic Nuclei, Milky Way Galaxy, Near Infrared Radiation, Astronomical Maps, Giant Stars, H Ii Regions, Star Clusters
Scientific paper
Observations of the galactic center with a CCD camera in the far-red (9030-9270 A) have revealed three previously unknown objects which are designated FRS 1, FRS 2, and FRS 3. The three objects have magnitudes of 18.7, 19.5, and 19.7, respectively, and lie within 10 arcsec of the direction of Sgr A West, corresponding to a distance of about 1/2 pc at 10 kpc. FRS 1 lies within the extended 2.2-micron infrared source IRS 16, which may coincide with the dynamical center of the Galaxy. Two interpretations of these far-red objects which have been considered are that (1) they are compact clusters of giant stars, earlier than M0 or (2) they are extremely compact H II regions observed in the forbidden emission of doubly ionized sulfur. Observational tests of these two hypotheses are suggested.
Bautz Mark W.
DePoy Darren L.
Meyer Samuel
Ricker George R.
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