Four New Dense Molecular Cores in the Taurus Molecular Cloud (TMC): Ammonia and Cyanodiacetylene Observations

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dc.creatorCodella, C.
dc.creatorWelser, R.
dc.creatorHenkel, C.
dc.creatorBenson, P. J.
dc.creatorMyers, P. C.
dc.date1997-06-02
dc.date.accessioned2026-07-07T02:23:29Z
dc.date.available2026-07-07T02:23:29Z
dc.descriptionTrying to obtain a more complete picture of star forming regions in the Taurus Molecular Cloud, four newly discovered dense 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 of 0.06-0.09 pc, hydrogen densities of order 10000 - 100000 cm-3 and kinetic temperatures between 8 and 10 K. The masses range from 0.2 - 1.0 solar masses, 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 equilibrium. Moreover we report the detection of the J=9-8 transition of HC5N towards the four ammonia peak positions. The HC5N column densities are in agreement with values derived for other molecular cores in the TMC.
dc.description10 pages, Latex file, 7 Postscript Figures, l-aa.sty and psfig.sty included. Accepted to Astronomy and Astrophysics
dc.identifierhttps://arxiv.org/abs/astro-ph/9706006
dc.identifierhttp://arxiv.org/abs/astro-ph/9706006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/11266
dc.subjectAstrophysics
dc.titleFour New Dense Molecular Cores in the Taurus Molecular Cloud (TMC): Ammonia and Cyanodiacetylene Observations
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