1. LABORATORY AND ASTRONOMICAL DISCOVERY OF HYDROMAGNESIUM ISOCYANIDE
C. CABEZAS, J. CERNICHARO, J.L. ALONSO, M. AGÚNDEZ, S. MATA,
M. GUELÍN AND I. PEÑA
Grupo de Espectroscopia Molecular (GEM), Laboratorios de Espectroscopia y Bioespectroscopia, Unidad Asociada CSIC, UVa,Valladolid, Spain
Group of Molecular Astrophysics. ICMM C/Sor Juana Ines de la Cruz N3 Cantoblanco, Madrid, Spain
CNRS, LAB, UMR 5804, Floirac, France
Institut de Radioastronomie Millimétrique, 300 rue de la Piscine, Saint Martin dH´eres, France

2. INTRODUCTION AND MOTIVATION
Metal-containing molecules have been found in the ISM
Diatomic molecules; NaCl, KCl, AlF1…
Cyanides and Isocyanides: MgNC,2 AlNC,3 SiCN,4 …
Open shell metal cyanides and isocyanides present high reactivity towards stable closed shell species
MgNC is the most abundant metal isocyanide in the ISM
Could HMgNC be present in the ISM?
To date, no laboratory data for HMgNC
1Cernicharo, J., & Guélin, M. 1987, A&A, 183, L10
2 Kawaguchi, K., Kagi, E., Hirano, T., et al. 1993, ApJL, 406, L39
3 Ziurys, L. M., Savage, C., Highberger, J. L., et al. 2002, ApJL, 564, L45
4 Guélin, M., Muller, S., Cernicharo, J., et al. 2000, A&A, 363, L9

3. PREVIOUS RESULTS ON METAL BEARING SPECIES
FROM VALLADOLID LAB
Pure rotational spectrum of AlCCH and AgCCH have been observed1 using LA-MB-FTMW spectroscopy combined with electric discharges source
Precursors:
*Solid rods of pure aluminum and silver
* Mixture of 0.3 % of C2H2 in Ne
Based on these results we tackle the investigation of HMgNC
1Cabezas et al. 2012, J. Mol. Spectrosc., 278, 31

4. EXPERIMENTAL: LA-MB-FTMW SPECTROSCOPY+DC DISCHARGES
FT-MW Spectrometer
Fabry-Pérot Resonator
Picosecond Laser
4-26 GHz Frequency Range

5. EXPERIMENTAL: LA-MB-FTMW SPECTROSCOPY+DC DISCHARGES
Gas pulse
Laser pulse
Jet Ne +
0.2%
C2H3CN
DC pulse
Metal
sample
Electrodes
Rotary
Diffusion
pump
Laser
Nd:YAG laser

6. EXPERIMENTAL: LA-MB-FTMW SPECTROSCOPY+DC DISCHARGES
Gas pulse
FT-MW
spectrometer
Laser pulse
Jet Ne +
0.2%
C2H3CN
Polarization
DC pulse
MW pulse
MW field
Rotary
Diffusion
pump

7. EXPERIMENTAL: LA-MB-FTMW SPECTROSCOPY
Gas pulse
FT-MW
spectrometer
Laser pulse Ne +
0.2%
C2H3CN
DC pulse
MW pulse
Molecular emission
Detection
Rotary
Diffusion
pump
Detection
Frequency-domain FT
Time-domain

8. ROTATIONAL SPECTRUM Find optimal experimental conditions
J= 3/2-1/2
F= 5/2-3/2
Find optimal experimental conditions
for Mg compounds
*Laser ablation and electric discharges
*Trial with different gas mixtures
Generation of MgNC

9. Laboratory identification of HMgNC
ROTATIONAL SPECTRUM Ju Fu Jl Fl
ν (MHz)
νo -νc (kHz) 1
0.2 2
0.3
-1.8
-1.2
-1.5
2.5 3
0.5
0.4
Laboratory
Theory
B / MHz
(6)
5438.2
D / kHz
2.90 (8) -
eQq (N) / MHz
(2)
-1.95
rms / kHz
1.2
Laboratory identification of HMgNC

10. ASTRONOMICAL OBSERVATIONS OF HMgNC
IRAM 30m telescope at Pico Veleta (Spain)
The 30m beam size at the observing frequencies ranges from 29´´ for the J = 8–7 transition to 17´´ for the J = 13–12 line.

11. ASTRONOMICAL OBSERVATIONS OF HMgNC
IRAM 30m telescope at Pico Veleta (Spain) Ju Fu Jl Fl
ν (MHz)
Unc(MHz)
νo -νc (kHz) 1
.003
0.2 2
0.3
-1.8
-1.2
-1.5
2.5 3
0.5
0.4 8 7
.400
584.5 10 9
-210.4 12 11
1.000
-182.6 13
-533.8 9 8
Fully blended with 111,10-101,9 of C4H2 11 10
Blocked Earth’s Atmosphere
Laboratory
IRC+10216
B / MHz
(6)
(3)
D / kHz
2.90 (8)
2.94 (5)
eQq (N) / MHz
(2) -
rms / kHz
1.2
Detection of HMgNC in the carbon rich evolved star IRC+10216
Cabezas et al. ApJ 775, 133, 2013

12. FUTURE PROJECTS
Investigation of new metal-containing molecules candidates for interstellar detection, including Si, Mg, Na or Ca
Developing of new experimental techniques to create and characterize metal bearing species
Find in future observations with ALMA signatures of metal (Mg, Ca, Fe) bearing radicals and closed shell molecules which could provide information on where the different species are formed in the circumstellar envelope and, hence, on their formation mechanism

13. CSD 2009-00038 Molecular Astrophysics
ACKNOWLEDGMENTS
Grupo de Espectroscopia Molecular (GEM) Laboratorios de Espectroscopia y Bioespectroscopia, Unidad Asociada CSIC, UVa,Valladolid, Spain
Grants CTQ ,
AYA and AYA
CSD Molecular Astrophysics
Grants VA070A08 and CIP13/01