Gamma-ray bursts from dusty regions with little molecular gas
Gamma-ray bursts from dusty regions with little molecular gas
复制标题
伽马射线从含有少量分子气体的尘埃区域爆发
DOI：
10.1017/s1743921316005329
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Kotaro
中科院分区：
文献类型：
--
作者：
Hatsukade;Bunyo; Ohta;Kouji; Endo;Akira; Nakanishi;Kouichiro; Tamura;Yoichi; Hashimoto;Tetsuya; Kohno;Kotaro
我们使用阿塔卡马大型毫米/亚毫米阵列 (ALMA) 检测到来自两个 GRB 宿主星系（GRB 020819B 和 GRB 051022）的 CO 谱线和 1.2 毫米连续发射。这是首次在GRB宿主中检测到分子气体排放。 GRB 020819B地点的分子气体与尘埃质量的比率显着低于银河系和附近的恒星形成星系，这表明GRB发生的恒星形成环境与当地星系的恒星形成环境不同。可能的原因是大部分致密气体被强烈的星际紫外线辐射场消散。
We detected CO line and 1.2-mm continuum emission from the two GRB host galaxies (GRB 020819B and GRB 051022) by using the Atacama Large Millimeter/submillimeter Array (ALMA). This is the first case for detecting molecular gas emission in GRB hosts. The ratio of molecular gas to dust mass of the GRB 020819B site is significantly lower than those of the Milky Way and nearby star-forming galaxies, suggesting that the star-forming environment where the GRB occur is different from those in local galaxies. The possible reason is that much of the dense gas is dissipated by a strong interstellar ultraviolet radiation field.