1. U line procedure DeltaF(J) = 2B(J+1) separations =2B (MHz) 106913
-85530
21383
Check: /21383 ca integer !! Good Eh?
Prediction - next line at
+21383
128296
Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2
U line procedure
10693
85530
Harry Kroto 2004

2. Check: 106913/21383 ca integer 4.999906!! Good Eh?
DeltaF(J) = 2B(J+1)
separations =2B (MHz)
106913
-85530
21383
Check: /21383 ca integer !! Good Eh?
Prediction - next line at
+21383
128296
Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2
106913
85530
Harry Kroto 2004

3. Check: 106913/21383 ca integer 4.999906!! Good Eh?
ΔF(J) = 2B(J+1)
separations =2B (MHz)
106913
-85530
21383
Check: /21383 ca integer !! Good Eh?
Prediction - next line at
+21383
128296
Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2
10693
85530
Harry Kroto 2004

4. Check: 106913/21383 ca integer 4.999906!! Good Eh?
ΔF(J) = 2B(J+1)
separations =2B (MHz)
106913
-85530
21383
Check: /21383 ca integer !! Good Eh?
Prediction - next line at
+21383
128296
Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2
10693
85530
Harry Kroto 2004

5. predict the frequency (in MHz) of the next line to higher frequency.
ΔF(J) = 2B(J+1)
Separations = 2B (MHz)
MHz
MHz
Homework
Assuming these two interstellar lines are consecutive rotational transitions of a linear molecule:
predict the frequency (in MHz) of the next line to higher frequency.
Assign the J values of the lines
10693
85530
Harry Kroto 2004