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Survey of Regions with Methanol Masers in the CS (J = 2–1) Line: Statistical Characteristics of Radiation

  • PHYSICS OF STARS AND INTERSTELLAR MEDIUM
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Abstract

The paper aims at establishing relations between the parameters of methanol maser emission that originates in dense star-forming regions and parameters of a dense core using emission of the CS molecule. A total of 164 sources toward the positions of methanol masers using the RT-22 radio telescope at CrAO, Ukraine, have been observed. For 85 sources, the CS (J = 2–1) line emission was detected. Most of the sources have been selected from catalogs of the class I and class II methanol masers. For methanol masers, this is the most complete survey in the CS (J = 2–1) line on the northern sky. A comparative analysis of parameters of methanol masers spectra in the CS (J = 2–1) line, and methanol masers, luminosities of dense cores, and infrared sources, has been performed. The detection rates of the CS (J = 2–1) line emission, its intensities and widths, the differences between the systematic velocities and velocities of the maser line centers have been investigated. The radiation detection rates in the CS (J = 2–1) line are shown to differ for various source samplings. The form of the dependences lgLcs – lgLbol, lgLmas – lgLcs and lgLmas – lgLbol has been found for sources with which methanol masers are associated. Based on the luminosity of infrared sources, samples of sources in which the CS (J = 2–1) line emission is detected with a higher probability have been determined.

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  1. Institute of Radio Astronomy, National Academy of Sciences of Ukraine, Kharkiv, Ukraine

    O. M. Patoka, V. M. Shulga, O. V. Antyufeyev, V. V. Myshenko, A. M. Korolev & V. I. Piddyachiy

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Patoka, O.M., Shulga, V.M., Antyufeyev, O.V. et al. Survey of Regions with Methanol Masers in the CS (J = 2–1) Line: Statistical Characteristics of Radiation. Kinemat. Phys. Celest. Bodies 34, 217–257 (2018). https://doi.org/10.3103/S0884591318050033

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