Bibcode
DOI
Trapero, Joaquin; Sempere, Maria J.; Beckman, J. E.; Hobbs, L. M.
Referencia bibliográfica
Astrophysical Journal v.457, p.731
Fecha de publicación:
2
1996
Número de citas
4
Número de citas referidas
4
Descripción
Two molecular cloudlets have been detected and mapped in a partial
survey of 12CO emission in a diffuse H I cloud toward
Perseus. Previous observations of K I absorption and 21 cm emission had
shown that the cloud is within 120 pc of the Sun, with a diameter of 14
pc, a total mass 1500 Msun, and temperatures as low as 30 K,
making it a good candidate to contain molecular gas. The two cloudlets
embedded in the H I cloud have diameters ˜1 pc, molecular
densities 100 cm-3, and molecular masses of only 1
Msun, and lie in front of the two stars with the strongest
detected K I absorption. The derived total hydrogen column density is 1
x 1021 cm-2 The molecular cores detected are not
virialized but confined by the turbulent pressure of the interstellar
medium. No 12CO was detected along the lines of sight to
eight stars showing K I absorption, or in the direction of the biggest
concentration of H I.