Computer Science
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30534s&link_type=abstract
Spitzer Proposal ID #30534
Computer Science
Scientific paper
The molecular cloud SW of NGC7538 is a well studied high-mass star forming region, although the third star froming core, NGC7538 S has received very little attention since the seminal work by Werner et al in 1979. Recently Sandell et al discovered a high mass protostar with a rotating disk in this massive cold cloud core. Preliminary analysis of IRAC archive data show that this high-mass star is detected by IRAC at wavelengths longer than 4.5 micron and show a small cluster of deeply embedded young stars about 10" to the NW of the star. In this proposal we plan to use IRS to measure the SED of this unique high-mass protostar, because the broadband IRAC data appear to be heavily affected by absorption bands from the dense, cold surrounding cloud core. We will also obtain spectra of all the stars in the embedded cluster to bettert understand their evolutionary status. We have identified four H2O masers coinciding with IRAS sources in the southern part of the cloud and we will also take low resolution spectra of these sources. Finally we ask for modest support to continue analysing the IRAC data of NGC7538 to support and complement the IRS project, our extensive BIMA and VLA observations of this region and aid in planning future observation with CARMA as soon as it becomes operational.
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