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CH3OH_I
ZUB07 - Methanol Masers Observations in the 3-mm Bandwidth at the Radio Telescope RT-22 CrAO
Short title
: Zubrin et al. (2007)
Authors
: Zubrin, S. Yu. Antyufeyev, A. V. Myshenko, V. V. Shulga, V. M.
Journal
: YSC 14 Proceedings of Contributed Papers (eds. G. Ivashchenko, A. Golovin), pp. 95-98
Bibcode
:
2007ysc..conf...95Z
PDF
:
ZUB07.pdf
Abstract
We report the beginning of the astronomical masers investigations in the 3-mm bandwidth at the radio telescope RT-22 (CrAO, Ukraine). For this purpose the special complex for maser lines investigation in 85...115 GHz frequency band is developed. It is made on the base of the low noise cryogenic Shottky-diode receiver and the high resolution Fourier-spectrometer. The cryogenic receiver has the DSB noise temperature less than 100K. The spectral channel separation of the Fourier-spectrometer is about 4kHz and the spectrometer bandwidth is 8 MHz. Results of maser observations of 8^{0}-7^{1} A^{ +} transition of methanol (95.169GHz) towards DR-21(OH), DR-21W and NGC7538 are in good agreement with early obtained results by other authors. On the basis of the analysis of the location of masers in the NGC7538 direction we can assume that the origin of all known class I methanol masers in this region is connected with existing molecular outflows from young stars.
Input tables
: Table 1
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Detection table from Zubrin et al. (2007)
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individual components
ID
Obs. RA
Obs. Dec
l
b
Source name
Line
V
peak
FWHM
F
peak
Telescope
Beam
Detection
(J2000)
(J2000)
(deg.)
(deg.)
CH
3
OH (class I)
(km/s)
(km/s)
(Jy)
(arcsec)
Yes
/
No
1
23 13 46.5
+61 27 32.7
111.5404
0.7663
NGC7538
95 GHz (I)
-57.44
0.75
21
RT22_CrAO
40
+CH
3
OH I
2
20 38 59.2
+42 22 48.7
81.7183
0.5755
DR21(OH)
95 GHz (I)
0.16
0.73
136
RT22_CrAO
40
+CH
3
OH I
-SiO
3
20 38 54.6
+42 19 23.5
81.6644
0.5521
DR21-W
95 GHz (I)
-2.69
1.18
52
RT22_CrAO
40
-CH
3
OH I
+CH
3
OH I
+CH
3
OH II
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ZUB07.pdf
