Open AccessThe discovery of clumpy structure in the diffuse gas towards Cyg OB2 No. 12
Author(s) -
Scappini Flavio,
Casu Silvia,
CecchiPestellini Cesare,
Olberg Michael
Publication year - 2002
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2002.05928.x
Subject(s) - physics , astrophysics , line of sight , line (geometry) , sky , molecular cloud , astronomy , stars , geometry , mathematics
We have mapped the 13 CO (1–0) line in a region of sky towards the star Cyg OB2 No. 12. The observations rule out the possibility that the molecular material along the line of sight is distributed over a long path of very dilute gas. Instead, we present unambiguous evidence of well‐defined kinematical structures, which might be assembled to form a cloud complex. The chemistry that leads to H + 3 appears decoupled from that responsible for the production of heavier species.