Survival of interstellar molecules to prestellar dense core collapse and early phases of disk formation

U. Hincelin Valentine Wakelam 1 Benoît Commerçon 2, 3 F. Hersant 4 S. Guilloteau 1
1 AMOR 2013
L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux, OASU - Observatoire aquitain des sciences de l'univers, LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac], Université Sciences et Technologies - Bordeaux 1
4 FORMATION STELLAIRE 2013
L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux, OASU - Observatoire aquitain des sciences de l'univers, LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac], Université Sciences et Technologies - Bordeaux 1
Abstract : An outstanding question of astrobiology is the link between the chemical composition of planets, comets, and other solar system bodies and the molecules formed in the interstellar medium. Understanding the chemical and physical evolution of the matter leading to the formation of protoplanetary disks is an important step for this. We provide some new clues to this long-standing problem using three-dimensional chemical simulations of the early phases of disk formation: we interfaced the full gas-grain chemical model Nautilus with the radiation-magnetohydrodynamic model RAMSES, for different configurations and intensities of magnetic field. Our results show that the chemical content (gas and ices) is globally conserved during the collapsing process, from the parent molecular cloud to the young disk surrounding the first Larson core. A qualitative comparison with cometary composition suggests that comets are constituted of different phases, some molecules being direct tracers of interstellar chemistry, while others, including complex molecules, seem to have been formed in disks, where higher densities and temperatures allow for an active grain surface chemistry. The latter phase, and its connection with the formation of the first Larson core, remains to be modeled.
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-00858261
Contributeur : <>
Soumis le : jeudi 5 septembre 2013 - 09:53:30
Dernière modification le : mercredi 27 juillet 2016 - 14:48:48

Identifiants

Collections

Citation

U. Hincelin, Valentine Wakelam, Benoît Commerçon, F. Hersant, S. Guilloteau. Survival of interstellar molecules to prestellar dense core collapse and early phases of disk formation. Astrophysical Journal, American Astronomical Society, 2013, 775 (1), pp.44. 〈10.1088/0004-637X/775/1/44〉. 〈hal-00858261〉

Partager

Métriques

Consultations de la notice

209