Evidence of Core Growth in the Dragon Infrared Dark Cloud: A Path for Massive Star Formation

Shuo Kong, Héctor G. Arce, Yancy Shirley, Colton Glasgow

Research output: Contribution to journalArticlepeer-review

Abstract

A sample of 1.3 mm continuum cores in the Dragon infrared dark cloud (also known as G28.37+0.07 or G28.34+0.06) is analyzed statistically. Based on their association with molecular outflows, the sample is divided into protostellar and starless cores. Statistical tests suggest that the protostellar cores are more massive than the starless cores, even after temperature and opacity biases are accounted for. We suggest that the mass difference indicates core mass growth since their formation. The mass growth implies that massive star formation may not have to start with massive prestellar cores, depending on the core mass growth rate. Its impact on the relation between core mass function and stellar initial mass function is to be further explored.

Original languageEnglish (US)
Article number156
JournalAstrophysical Journal
Volume912
Issue number2
DOIs
StatePublished - May 10 2021

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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