SIMBAD references

2012ApJ...745...18S - Astrophys. J., 745, 18 (2012/January-3)

How starless are starless cores?

SCHNEE S., DI FRANCESCO J., ENOCH M., FRIESEN R., JOHNSTONE D. and SADAVOY S.

Abstract (from CDS):

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.

Abstract Copyright:

Journal keyword(s): astrochemistry - ISM: jets and outflows - stars: formation

Simbad objects: 27

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2019.12.12-17:37:38

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