L183 (=L134N) revisited : the physical conditions in the main prestellar core

L. Pagani (1) , A. Bacmann (2, 3, 4, 5) , S. Cabrit (1) , C. Vastel (6)

1 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
2 ESO - European Southern Observatory
3 L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux
4 OASU - Observatoire aquitain des sciences de l'univers
5 LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
6 CESR - Centre d'étude spatiale des rayonnements

We continue the detailed study of L183 with the observations of N-bearing species (N2H+, N2D+, NH3) which allow to trace the physical conditions in the most inner parts of prestellar cores where standard tracers are completely depleted. With the help of our new 1D Monte-Carlo code which treats the hyperfine structure of N2H+ in detail, we are able to trace the density, temperature and N2H+/N2D+ abundance profiles of the core and also its kinematical properties. Depletion of N2H+, very cold gas and a peculiar rotational pattern are revealed.

Mots clés: Observations

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Astrophysique [astro-ph]

L. Pagani, A. Bacmann, S. Cabrit, C. Vastel. L183 (=L134N) revisited : the physical conditions in the main prestellar core. Molecules in Space and Laboratory, meeting held in Paris, France, May 14-18, 2007, 2007, Paris, France. ⟨hal-00264947⟩