Near-infrared 0.15 arcsec resolution imaging of the Galactic center

Abstract

view Abstract Citations (110) References (37) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Near-Infrared 0 -8pt.15 Resolution Imaging of the Galactic Center Eckart, A. ; Genzel, R. ; Hofmann, R. ; Sams, B. J. ; Tacconi-Garman, L. E. Abstract We present deep 1.6 (H) and 2.2-micron (K) images of the central parsec of the Galaxy at a resolution of 0.15 aresec. Most of the flux in earlier seeing-limited images comes from about 340 unresolved stellar sources with K-magnitudes not greater than 14. Most of the fainter stars in the central parsec are likely M- rather than K-giants. The IRS 16 and 13 complexes are resolved into about 25 and six sources, a number of which are probably luminous hot stars. We confirm the presence of a blue near-infrared object (K is about 13) at the position of the compact radio source Sgr A*. The spatial centroid of the number distribution of compact sources is consistent with the position of Sgr A* but not with a position in the IRS 16 complex. The stellar surface density is very well fitted by an isothermal cluster model with a core radius of 0.15 + 0.05 pc. The central stellar density is close to 10 exp 8 solar masses/cu pc 3. Buildup of massive stars by collisional merging of lower mass stars and collisional disruption of giant atmospheres are very probable processes in the central 0.2 pc. Publication: The Astrophysical Journal Pub Date: April 1993 DOI: 10.1086/186810 Bibcode: 1993ApJ...407L..77E Keywords: Galactic Evolution; Galactic Nuclei; Infrared Imagery; Star Clusters; Star Formation; Autocorrelation; Black Holes (Astronomy); Data Reduction; Hot Stars; Main Sequence Stars; Near Infrared Radiation; Astrophysics; GALAXIES: NUCLEI; GALAXY: CENTER; INFRARED: STARS full text sources ADS | data products SIMBAD (3)