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 lgL_cs – lgL_bol, lgL_mas – lgL_cs and lgL_mas – lgL_bol 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.

中文翻译：

---

CS（J = 2–1）线中带有甲醇主物质的区域的调查：辐射的统计特征

摘要

本文旨在利用CS分子的发射建立起源于致密恒星形成区域的甲醇maser排放参数与致密核参数之间的关系。使用乌克兰CrAO的RT-22射电望远镜观察到总共164个朝向甲醇激射体位置的放射源。对于85个源，检测到CS（J = 2-1）线发射。大多数来源均选自I类和II类甲醇masers的目录。对于甲醇激射器，这是在北部天空的CS（J = 2-1）线中最完整的测量。CS中甲醇masers谱参数的比较分析（J。= 2–1）线，并且进行了甲醇激射，致密芯的发光度和红外光源。研究了CS（J = 2-1）线发射的检出率，强度和宽度，系统速度和maser线中心的速度之间的差异。CS（J = 2-1）线中的辐射检测率对于各种源采样显示为不同。依赖性形式lgL _cs – lgL _bol，lgL _mas – lgL _cs和lgL _mas – lgL _bol已发现与甲醇激射有关的来源。根据红外光源的发光度，已经确定了以较高概率检测到CS（J = 2-1）线发射的光源的样本。