Detection of New Ammonia Sources
1980 ◽
Vol 87
◽
pp. 83-84
Keyword(s):
Ammonia is a favoured molecule for the study of molecular clouds since several important parameters of the cloud can be deduced from simple observations of the J,K=1,1 and 2,2 inversion doublet transitions and the hyperfine structure in the (1,1) line. With the additional knowledge of the kinetic temperature Tk from observations of CO, for example, it is possible to compute the excitation temperature of the (1,1) line (T11), the rotational temperature between the (1,1) and (2,2) levels (T21), the molecular hydrogen density n(H2) and ammonia column density N(NH3) (see, for example, Martin and Barrett, 1978).
1991 ◽
Vol 148
◽
pp. 429-430
1983 ◽
Vol 100
◽
pp. 45-46
Keyword(s):
1987 ◽
Vol 120
◽
pp. 185-186
Keyword(s):
Keyword(s):
2017 ◽
Vol 13
(S332)
◽
pp. 81-87
Keyword(s):
2020 ◽
Vol 497
(2)
◽
pp. 1521-1535
Keyword(s):
2013 ◽
Vol 9
(S297)
◽
pp. 378-380