PREUVE OVNI

Articles

Album photos

Forum

Discussions générales

Membres

525 membres

Pour être tenu au courant des futures mises à jour du blog et y participer, inscrivez-vous:

A découvrir

Statistiques

Total :
Aujourd'hui :
En ce moment :

Bioastronomie - IAU list of important spectral lines - Astrophysics (I)

http://www.astrosurf.com/luxorion/radioastronomy-lines.htm

IAU list of important spectral lines

Astrophysics (I)

At the XXIst General Assembly of the International Astronomical Union, IAU, (Buenos Aires, July 23 - August 1, 1991) the astrophysically most important spectral lines have been carefully reviewed. The IAU listed the revision of these spectral lines as reproduced below and expressed the need to protect these frequency bands from in-band, band-edge and harmonic emissions, especially from space-borne transmitters.

Astrophysically most important spectral lines

Substance

Rest Frequency

Suggested

minimum bandwidth

Notes

Deuterium (DI)	327.384	MHz	327.0 -	327.7	MHz
Hydrogen (HI)	1420.406	MHz	1370.0 -	1427	MHz	2),3)
Hydroxyl radical (OH)	1612.231	MHz	1606.8 -	1613.8	MHz	3),4)
Hydroxyl radical (OH)	1665.402	MHz	1659.8 -	1667.1	MHz	4)
Hydroxyl radical (OH)	1667.359	MHz	1661.8 -	1669	MHz	4)
Hydroxyl radical (OH)	1720.53	MHz	1714.8 -	1722.2	MHz	3),4)
Methyladyne (CH)	3263.794	MHz	3252.9 -	3267.1	MHz	3),4)
Methyladyne (CH)	3335.481	MHz	3324.4 -	3338.8	MHz	3),4)
Methyladyne (CH)	3349.193	MHz	3338.0 -	3352.5	MHz	3),4)
Formaldehyde (H2CO)	4829.66	MHz	4813.6 -	4834.5	MHz	3),4)
Methanol (CH2OH)	6668.518	MHz	6661.8 -	6675.2	MHz	3),6)
Ionized Helium Isotope (3HeII)	8665.65	MHz	8660.0 -	8670	MHz
Methanol (CH3OH)	12.178	GHz	12.17 -	12.19	GHz	3),6)
Formaldehyde (H2CO)	14.488	GHz	14.44 -	14.5	GHz	3),4)
Cyclopropenylidene (C3H2)	18.343	GHz	18.28 -	18.36	GHz	3),4),6)
Water Vapour (H2O)	22.235	GHz	22.16 -	22.26	GHz	3),4)
Ammonia (NH3)	23.694	GHz	23.61 -	23.71	GHz	4)
Ammonia (NH3)	23.723	GHz	23.64 -	23.74	GHz	4)
Ammonia (NH3)	23.87	GHz	23.79 -	23.89	GHz	4)
Silicon monoxide (SiO)	42.821	GHz	42.77 -	42.86	GHz
Silicon monoxide (SiO)	43.122	GHz	43.07 -	43.17	GHz
Carbon monosulphide (CS)	48.991	GHz	48.94 -	49.04	GHz
Deuterated formylium (DCO+)	72.039	GHz	71.96 -	72.11	GHz	3)
Silicon monoxide (SiO)	86.243	GHz	86.16 -	86.33	GHz
Formylium (H13CO+)	86.754	GHz	86.66 -	86.84	GHz
Silicon monoxide (SiO)	86.847	GHz	86.76 -	86.93	GHz
Ethynyl radical (C2H)	87.3	GHz	87.21 -	87.39	GHz	5)
Hydrogen cyanide (HCN)	88.632	GHz	88.34 -	88.72	GHz	4)
Formylium (HCO+)	89.189	GHz	88.89 -	89.28	GHz	4)
Hydrogen isocyanide (HNC)	90.664	GHz	90.57 -	90.76	GHz
Diazenylium (N2H)	93.174	GHz	93.07 -	93.27	GHz
Carbon monosulphide (CS)	97.981	GHz	97.65 -	98.08	GHz	4)
Carbon monoxide (C18O)	109.782	GHz	109.67 -	109.89	GHz
Carbon monoxide (13CO)	110.201	GHz	109.83 -	110.31	GHz	4)
Carbon monoxide (C17O)	112.359	GHz	112.25 -	112.47	GHz	6)
Carbon monoxide (CO)	115.271	GHz	114.88 -	115.39	GHz	4)
Formaldehyde (H2CO)	137.45	GHz	137.31 -	137.59	GHz	3),6)
Formaldehyde (H2CO)	140.84	GHz	140.69 -	140.98	GHz
Carbon monosulphide (CS)	146.969	GHz	146.82 -	147.12	GHz
Water vapour (H2O)	183.31	GHz	183.12 -	183.5	GHz
Carbon monoxide (C18O)	219.56	GHz	219.34 -	219.78	GHz
Carbon monoxide (13CO)	220.399	GHz	219.67 -	220.62	GHz	4)
Carbon monoxide (CO)	230.538	GHz	229.77-	230.77	GHz	4)
Carbon monosulphide (CS)	244.953	GHz	244.72 -	245.2	GHz	6)
Hydrogen cyanide (HCN)	265.886	GHz	265.62 -	266.15	GHz
Formylium (HCO+)	267.557	GHz	267.29 -	267.83	GHz
Hydrogen isocyanide (HNC)	271.981	GHz	271.71 -	272.25	GHz
Dyazenulium (N2H+)	279.511	GHz	279.23 -	279.79	GHz
Carbon monoxide (C18O)	312.33	GHz	329.00 -	329.66	GHz
Carbon monoxide (13CO)	330.587	GHz	330.25 -	330.92	GHz
Carbon monosulphide (CS)	342.883	GHz	342.54 -	343.23	GHz
Carbon monoxide (CO)	345.796	GHz	345.45 -	346.14	GHz
Hydrogen cyanide (HCN)	354.484	GHz	354.13 -	354.84	GHz
Formylium (HCO+)	356.734	GHz	356.37 -	357.09	GHz
Dyazenulium (N2H+)	372.672	GHz	372.30 -	373.05	GHz
Water vapour (H2O)	380.197	GHz	379.81 -	380.58	GHz
Carbon monoxide (C18O)	439.088	GHz	438.64 -	439.53	GHz
Carbon monoxide (13CO)	440.765	GHz	440.32 -	441.21	GHz
Carbon monoxide (CO)	461.041	GHz	460.57 -	461.51	GHz
Heavy water (HDO)	464.925	GHz	464.46 -	465.39	GHz
Carbon (CI)	492.162	GHz	491.66 -	492.66	GHz
Water vapour (H218O)	547.676	GHz	547.13 -	548.22	GHz
Water vapour (H2O)	556.936	GHz	556.37 -	557.5	GHz
Ammonia (15NH3)	572.113	GHz	571.54 -	572.69	GHz
Ammonia (NH3)	572.498	GHz	571.92 -	573.07	GHz
Carbon monoxide (CO)	691.473	GHz	690.78 -	692.17	GHz
Hydrogen cyanide (HCN)	797.433	GHz	796.64 -	789.23	GHz
Formylium (HCO+)	802.653	GHz	801.85 -	803.85	GHz
Carbon monoxide (CO)	806.652	GHz	805.85 -	807.46	GHz
Carbon (CI)	809.35	GHz	808.54 -	810.16	GHz
¹): If Note ⁴) or Note ²) are not listed, the band limits are Doppler-shifted frequencies corresponding to radial velocities of +/- 300 km/s (consistent with line radiation occurring in our galaxy). ²): An extension to lower frequencies of the allocation of 1400-1427 MHz is required to allow for the Doppler shifts for HI observed in distant galaxies. ³): The current international allocation is not primary and/or does not meet bandwidth requirements. See: ITU-R Radio Regulations for more detailed information. ⁴): Because these line frequencies are also being used for observing other galaxies, the listed bandwidths include Doppler shifts corresponding to radial velocities of up to 1000 km/s. It should be noted that HI has been observed at frequencies redshifted to 500 MHz, while some lines of the most abundant molecules have been detected in galaxies with velocities up to 50 000 km/s, corresponding to a frequency reduction of up to 17%. ⁵): There are six closely spaced lines associated with this molecule at this frequency. The listed band is wide enough to permit observations of all six lines. ⁶): This line is not mentioned in Article 8 of the ITU-R Radio Regulations.