Line Catalog

The built-in line catalog currently includes the following transitions.

CO Family

  • 12CO(1-0)

  • 12CO(2-1)

  • 12CO(3-2)

  • 12CO(4-3)

  • 12CO(6-5)

  • 12CO(7-6)

  • 13CO(1-0)

  • 13CO(2-1)

  • 13CO(3-2)

  • 13CO(4-3)

  • C18O(1-0)

  • C18O(2-1)

  • C18O(3-2)

  • C18O(4-3)

  • C17O(1-0)

  • C17O(2-1)

  • C17O(3-2)

Dense Gas Tracers

  • HCN(1-0)

  • HCN(3-2)

  • HCN(4-3)

  • HCO+(1-0)

  • HCO+(3-2)

  • HCO+(4-3)

  • HNC(1-0)

  • HNC(3-2)

  • HNC(4-3)

  • N2H+(1-0)

  • N2H+(3-2)

  • CS(2-1)

  • CS(3-2)

  • CS(5-4)

  • CS(7-6)

PDR and Diffuse-Gas Tracers

  • CN(1-0)

  • CN(2-1)

  • CCH(1-0)

  • CCH(3-2)

Atomic Carbon

  • [CI](1-0)

  • [CI](2-1)

Shock Tracers

  • SiO(2-1)

  • SiO(5-4)

  • SiO(8-7)

  • SO(5_6-4_5)

  • SO(6_5-5_4)

  • SO2(11_1,11-10_0,10)

Chemistry and Cold Gas

  • H2CO(3_03-2_02)

  • H2CO(3_22-2_21)

  • H2CO(3_21-2_20)

  • H2CO(2_12-1_11)

  • NH2D(1_11-1_01)

Complex and Star-Forming Tracers

  • CH3OH(5_0-4_0)

  • CH3OH(2_k-1_k)

  • CH3CN(12_0-11_0)

Recombination Lines

  • H30alpha

  • H40alpha

Notes

Some entries such as CN, CCH, and CH3OH(2_k-1_k) are practical group-center proxies for blended or multi-component spectral complexes.