SQIID Imaging of the M 33 Core

Details SQIID Imaging of the M 33 Core SQIID Imaging of the M 33 Core

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.0804p&link_type=abstract

American Astronomical Society, 198th AAS Meeting, #08.04; Bulletin of the American Astronomical Society, Vol. 33, p.796

Astronomy and Astrophysics

Astronomy

Scientific paper

We have initiated a program of high spatial resolution infrared mapping of M 33 as part of a study of the stellar populations of nearby spiral galaxies. M 33 is one of the two nearest spiral galaxies, and is oriented nearly face-on, providing a unique opportunity for a comprehensive survey of its population. Large scale surveys in the infrared can penetrate the interstellar obscuration in M 33 and give a more complete assessment of the various stellar components than optical observations. Near-IR colors can also distinguish between different evolutionary classes, such as pre-main sequence stars, red supergiants, Asymptotic Giant Branch stars, and main sequence objects. We present here the first results of this program; near-IR J, H, and K band maps of M 33, obtained with the SQIID imager at KPNO. We focus on the core, ~5x5', region of M 33, and show near-IR colors for the sources in this region, as well as the central engine. Our maps complement those from the 2MASS survey, but go 5 magnitudes deeper (K ~ 20) and achieve better spatial resolution (FWHM < 2" ). These maps will provide the foundation for upcoming SIRTF observations which will involve temporal studies of the same region in the mid and far-IR. The reduced data from our JHK survey will be placed in a publicly available database when the project is complete.

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