Exploring the Origin of Dust in the Solar Neighborhood

Details Exploring the Origin of Dust in the Solar Neighborhood Exploring the Origin of Dust in the Solar Neighborhood

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934310u&link_type=abstract

American Astronomical Society, AAS Meeting #219, #343.10

Astronomy and Astrophysics

Astronomy

Scientific paper

Several papers have pointed out a discrepancy between the current rates of dust production by stellar sources and the observed amount of dust in the solar neighborhood. We investigate the possibility that a peak in a variable star formation history could have led to a higher amount of dust today through delayed injection. We employ a cyclic star formation history for the last 3 Gyr based on Hipparcos data to recalculate the contribution of stellar dust in the ISM using the most up-to-date models of stellar return rates. We find that although the varying star formation history will lead to peaks in the amount of observed dust, it cannot explain the high quantity of dust observed in the solar neighborhood today. Therefore, most of the dust in the ISM today must have been formed from preexisting stellar condensates.

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