The survey of the regions with methanol masers in CS (J = 2–1) line emission. Statistical characteristics of the radiations
| 1Patoka, OM, 1Shulga, V, 1Antyufeyev, O, 1Myshenko, VV, 1Korolev, AM, 1Piddyachiy, VI 1Institute of Radio Astronomy of NAS of Ukraine, Kharkiv, Ukraine |
| Kinemat. fiz. nebesnyh tel (Online) 2018, 34(5):3-51 |
| https://doi.org/10.15407/kfnt2018.05.003 |
| Start Page: Physics of Stars and Interstellar Medium |
| Language: Russian |
Abstract: The main purpose of this work was to establish relations between the parameters of methanol maser emission, which originates in dense star-forming regions, and parameters of the dense cores, which were obtained using emission of CS molecule. We have observed a total of 164 sources toward methanol maser positions using the RT-22 in CrAO, Ukraine. For 85 sources, emission in the CS (J= 2-1) line was detected. Most of the sources were selected from catalogues for both Class I and Class II methanol masers. For methanol masers, this is the most complete CS (J = 2-1) line survey in the north sky. We make a comparative analysis of the parameters of CS (J = 2-1) and methanol masers spectra, luminosities of dense cores and infrared sources. We study the detection rates of emission in CS (J= 2-1) line, the intensities and widths of the CS (J= 2-1) lines, the differences between the systematic velocities and the velocities of the maser lines centers. Differences in detection rates in the CS (J= 2-1) line emission for different source samples arc shown. A form of dependencies loggLCS — loggLbol, loggLmas — loggLCS and loggLmas — loggLbol for sources with which methanol masers arc associated is found. Based on the luminosity of infrared sources, samples of sources arc identified, in which the emission in the CS line (J= 2-1) is detected with a higher probability. |
| Keywords: CS, dense cores, methanol masers, star formation |
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