狮子座R的气体吸积与可能的星周旋转
Gas infall and possible circumstellar rotation in R Leo.
作者信息
Fonfría J P, Santander-García M, Cernicharo J, Velilla-Prieto L, Agúndez M, Marcelino N, Quintana-Lacaci G
机构信息
Molecular Astrophysics Group, Instituto de Física Fundamental, CSIC, C/ Serrano, 123, 28006, Madrid (Spain).
Observatorio Astronómico Nacional, OAN-IGN, Alfonso XII, 3, E-28014, Madrid (Spain).
出版信息
Astron Astrophys. 2019 Feb 19;622. doi: 10.1051/0004-6361/201834840.
We present new interferometer molecular observations of R Leo taken at 1.2 mm with the Atacama Large Millimeter Array with an angular resolution up to These observations permit us to resolve the innermost envelope of this star revealing the existence of a complex structure that involves extended continuum emission and molecular emission showing a non-radial gas velocity distribution. This molecular emission displays prominent red-shifted absorptions located right in front to the star typical of material infall and lateral gas motions compatible with the presence of a torus-like structure.
我们展示了利用阿塔卡马大型毫米波阵列在1.2毫米波段对狮子座R星进行的新干涉仪分子观测结果，其角分辨率高达 。这些观测使我们能够分辨出这颗恒星的最内层包层，揭示出一种复杂结构的存在，该结构涉及扩展的连续谱发射和分子发射，显示出非径向的气体速度分布。这种分子发射在恒星正前方显示出显著的红移吸收，这是物质吸积的典型特征，以及与类似环状结构存在相符的横向气体运动。
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