SIMBAD references

1997A&A...324..203C - Astronomy and Astrophysics, volume 324, 203-210 (1997/8-1)

Four dense molecular cores in the Taurus Molecular Cloud (TMC). Ammonia and cyanodiacetylene observations.


Abstract (from CDS):

Trying to obtain a more complete picture of star forming regions in the Taurus molecular cloud, four dense molecular cores (L1521D, L1521F, L1524, L1507A) are identified and mapped through the ammonia (J,K)=(1,1) and (2,2) rotational inversion lines. These cores have sizes from 0.06 to 0.09pc, hydrogen densities from 0.6x104 to 19.9x104cm–3 and kinetic temperatures between 7.9 and 9.9K. The masses range from 0.2 and 1.0M, placing the cores with the lowest M values at the lower edge of the mass distribution for ammonia cores in the TMC. Turbulent, thermal and gravitational energies have been estimated. A comparison between these energy terms and considerations related to thermal and turbulent line broadening indicate that these cores are close to gravitational equilibrium. Moreover, we report detections of the J=9-8 transition of HC5Ntowards the ammonia peak positions of these four molecular cores. The HC5N column densities are between 1.6x1012 and 9.2x1012cm–2, in agreement with values derived for other molecular cores located in the TMC.

Abstract Copyright:

Journal keyword(s): ISM: clouds - ISM: molecules - radio lines: ISM - ISM: individual objects: TMC

Status at CDS:  

CDS comments: Table 1: regions 'HHMMSS+DDMMSS' not in SIMBAD

Simbad objects: 17

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