Astroquimica

3.803 visualizaciones

Publicado el

Conferencia XI CNEQF Cartagena 2010.

0 comentarios
1 recomendación
Estadísticas
Notas
  • Sé el primero en comentar

Sin descargas
Visualizaciones
Visualizaciones totales
3.803
En SlideShare
0
De insertados
0
Número de insertados
1.343
Acciones
Compartido
0
Descargas
0
Comentarios
0
Recomendaciones
1
Insertados 0
No insertados

No hay notas en la diapositiva.
  • Three body reactions do not play a significant role in gas-phase interstellar chemistry
  • H- + H -> H + e (R~10^{-21} cm^{-3} s^{-1})
    Bergin et al. 2004: behind large scale flows, the timescale for H2 formation is ~10 Myr
  • If T = 100 -> k_bT~0.01 eV
  • If T = 100 -> k_bT~0.01 eV
  • ION - MOLECULE REACTION
  • Most are from undifferentiated parent bodies: original build-up particles still recognizable:
    Chondrules (mm size spherules)
    Matrix (`cement’ between chondrules: <10 m particles)
    Calcium-Aluminium-rich Inclusions (CAIs, cm size, rare)
  • Point out that we do not know how these molecules are formed. Still unexplored chemistry!
    Most amino acids can exist in either of two optical isomers. While L-amino acids represent the vast majority of amino acids found in proteins, D-amino acids are found in some proteins produced by exotic sea-dwelling organisms, such as cone snails.[21]
    The left hand is a non-superimposable mirror image of the right hand; no matter how the two hands are oriented, it is impossible for all the major features of both hands to coincide.
  • ×