SIMBAD references

1999ApJ...518L..37W - Astrophys. J., 518, L37-L40 (1999/June-2)

A contracting, turbulent, starless core in the Serpens cluster.


Abstract (from CDS):

We present combined single-dish and interferometric CS (2-1) and N2H+ (1-0) observations of a compact core in the northwest region of the Serpens molecular cloud. The core is starless according to observations from optical to millimeter wavelengths, but its lines have turbulent widths and ``infall asymmetry.'' Line profile modeling indicates supersonic inward motions vin≳0.34 km.s–1 over an extended region L>12,000 AU. The high infall speed and large extent exceeds the predictions of most thermal ambipolar diffusion models and points to a more dynamical process for core formation. A short (dynamic) timescale, ∼105 yr≃L/vin, is also suggested by the low N2H+ abundance, ∼1x10–10.

Abstract Copyright:

Journal keyword(s): ISM: Individual: Name: Serpens - ISM: Kinematics and Dynamics - Stars: Formation

Simbad objects: 10

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