Other
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21930303m&link_type=abstract
American Astronomical Society, AAS Meeting #219, #303.03
Other
Scientific paper
We are conducting a uniform survey of the Large Magellanic Cloud (LMC, 8×8.5 degrees), Small Magellanic Cloud (SMC, 5×5 degrees), and the Magellanic bridge (4×3 degrees) in SPIRE 250, 350, 500 um and PACS 100 and 160 um bands in order to produce a HERschel Inventory of The Agents of Galaxy Evolution (HERITAGE), the interstellar medium (ISM) and massive stars. The life cycle of baryonic matter in a galaxy is driven by the exchange of material between the ISM and stars. Dust is present at these key transition phases of matter: in the ISM, in the circumstellar environments of newly forming stars and in stellar ejecta of dying stars. The Herschel HERITAGE images are providing key insights into the life cycle of galaxies because the far-infrared and submm emission from dust grains is an effective tracer of the coldest ISM dust, the most deeply embedded young stellar objects (YSOs), and the dust ejected over the lifetime of massive stars. The ISM dust map will directly measure dust on a scale size of individual regions ( 10pc, 5-20 K) with column densities >0.85×10^{21} and >6×10^{21} H-atoms cm^{-2} for the LMC and SMC, respectively. Dust emission per beam will be detected for regions with >0.1 Msun at 25 K, >5 Msun of 10 K. HERITAGE will complete 1) the census of massive YSOs down to >4 Msun Class 0 sources and 2) the inventory of dust injected into the ISM by massive evolved stars and supernova remnants (SNRs). HERITAGE will create an archival data set that promises a lasting legacy to match current LMC and SMC surveys at other wavelengths. In this talk, I will review the highlights from HERITAGE's first two years of results.
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