SIMBAD references

2007ApJ...669.1024M - Astrophys. J., 669, 1024-1041 (2007/November-2)

Evidence for a long-standing top-heavy initial mass function in the central parsec of the galaxy.

MANESS H., MARTINS F., TRIPPE S., GENZEL R., GRAHAM J.R., SHEEHY C., SALARIS M., GILLESSEN S., ALEXANDER T., PAUMARD T., OTT T., ABUTER R. and EISENHAUER F.

Abstract (from CDS):

We classify 329 late-type giants within 1 pc of Sgr A*, using the adaptive optics integral field spectrometer SINFONI on the VLT. These observations represent the deepest spectroscopic data set so far obtained for the Galactic center, reaching a 50% completeness threshold at the approximate magnitude of the helium-burning red clump (KS∼15.5 mag). Combining our spectroscopic results with NaCo H and KSphotometry, we construct an observed Hertzsprung-Russell diagram, which we quantitatively compare to theoretical distributions of various star formation histories of the inner Galaxy, using a χ2 analysis. Our best-fit model corresponds to continuous star formation over the last 12 Gyr with a top-heavy initial mass function (IMF). The similarity of this IMF to the IMF observed for the most recent epoch of star formation is intriguing and perhaps suggests a connection between recent star formation and the stars formed throughout the history of the Galactic center.

Abstract Copyright:

Journal keyword(s): Galaxy: Center - Stars: Formation

Status at CDS:  

Simbad objects: 42

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2007ApJ...669.1024M and select 'bookmark this link' or equivalent in the popup menu


2020.04.02-18:31:53

© Université de Strasbourg/CNRS

    • Contact