期刊
ASTROPHYSICAL JOURNAL
卷 745, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/745/1/18
关键词
astrochemistry; ISM: jets and outflows; stars: formation
资金
- National Research Council of Canada
- Canadian Space Agency (via a SSEP Grant)
- Natural Sciences and Engineering Council of Canada (via a Discovery Grant)
- NASA
- Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Grant
In this paper, we present the results of Combined Array for Research in Millimeter-wave Astronomy continuum and spectral line observations of the dense core Per-Bolo 45. Although this core has previously been classified as starless, we find evidence for an outflow and conclude that Per-Bolo 45 is actually an embedded, low-luminosity protostar. We discuss the impact of newly discovered, low-luminosity, embedded objects in the Perseus molecular cloud on starless core and protostar lifetimes. We estimate that the starless core lifetime has been overestimated by 4%-18% and the Class 0/I protostellar lifetime has been underestimated by 5%-20%. Given the relatively large systematic uncertainties involved in these calculations, variations on the order of 10% do not significantly change either core lifetimes or the expected protostellar luminosity function. Finally, we suggest that high-resolution (sub) millimeter surveys of known cores lacking near-infrared and mid-infrared emission are necessary to make an accurate census of starless cores.
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