Scott Schnee, James Di Francesco, Melissa Enoch, Rachel Friesen, Doug Johnstone, Sarah Sadavoy
In this paper, we present the results of CARMA 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.
View original:
http://arxiv.org/abs/1111.6606
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