Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.9501g&link_type=abstract
American Astronomical Society, 198th AAS Meeting, #95.01; Bulletin of the American Astronomical Society, Vol. 33, p.1181
Astronomy and Astrophysics
Astronomy
1
Scientific paper
We present new observations and results from our program using infrared spectroscopy to study super star clusters in starbursts, focusing on the brightest young clusters in the dwarf starburst galaxy NGC 1569 and the merging Antennae Galaxies. We generate synthetic cluster spectra from infrared stellar spectral atlases and population synthesis models, and we use them together with stellar atmosphere models to interpret our high signal-to-noise-ratio H- and K-band NIRSPEC spectra at R ~ 2000. We infer cluster stellar populations, ages and masses, and for the youngest clusters that remain partially embedded in their natal gas, we also determine the properties of this interstellar matter that surrounds them. New high-resolution (R ~ 25,000) NIRSPEC spectra permit the measurement of infrared velocity dispersions of several super star clusters in these systems. Thus we derive the cluster kinematic masses, with which we constrain the IMF using population synthesis models. This work was supported in part by a NASA GSRP grant.
Gilbert Alyssa M.
Graham James R.
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