First Extragalactic Detection of HCO⁺

A. A. Stark and R. S. Wolff,
Some observations of extragalactic HCO⁺ and HCN,
Astrophys. J. 229, 118-120 (1979).

Source(s): M82
Facility: Bell Labs 7m

First Extragalactic Detection of H¹³CO⁺

R. Mauersberger and C. Henkel
Dense gas in nearby galaxies. IV - The detection of N₂H⁺, SiO, H¹³CO⁺, H¹³CN, and HN¹³C,
Astron. Astrophys. 245, 457-466 (1991).

Source(s): NGC253, IC342, and tentatively in M82
Facility: IRAM 30m

First Extragalactic Detection of DCO⁺

Y.-N. Chin, C. Henkel, T. J. Millar, J. B. Whiteoak, and R. Mauersberger, R.
Molecular abundances in the Magellanic Clouds. II. Deuterated species in the LMC,
Astron. Astrophys. 312, L33-L36 (1996).

Source(s): LMC
Facility: SEST 15m