标题： 重新审视干涉测量中的共生双星：II。 新的PIONIER数据 显示英文标题

标题： Revisiting symbiotic binaries with interferometry: II. New PIONIER data

摘要： 共生双星通常由红巨星和吸积白矮星组成，是研究宽距双星中质量转移的理想实验室，适用于一系列系统。 其中一个基本问题是质量如何从红巨星转移到白矮星。 我们使用VLTI/PIONIER仪器进行的干涉测量数据，结合盖亚数据，测量了七个共生系统中红巨星的半径。 我们进一步将这些红巨星置于赫罗图中，这使我们能够估计它们的质量，并表明它们都高度演化，可能处于渐近巨星分支上。 我们将测量的红巨星半径与其洛希瓣半径进行比较，结果表明，除了ZZ CMi之外，所有红巨星都很好地位于其洛希瓣内，质量转移很可能是通过恒星风进行的。 我们的干涉数据进一步证明，ZZ CMi中的红巨星几乎填满了其洛希瓣。 我们的结论仍受到一些红巨星或其双星轨道特性描述不足的限制，我们鼓励社区努力提供这些信息。 显示英文摘要

摘要： Symbiotic stars, which generally comprise a red giant and an accreting white dwarf, are excellent laboratories to understand mass transfer in wide binaries, with application to a wide family of systems. One of the fundamental questions is how mass is transferred from the red giant to the white dwarf. We use interferometric measurements made with the VLTI/PIONIER instrument, combined with Gaia data, to measure the radius of the giant in seven symbiotic systems. We further place the giants in the H-R diagramme, which allows us to estimate their mass and to show that they are all very evolved and likely on the asymptotic giant branch. We compare our measured giant radii to their Roche-lobe radius and show that, except for ZZ CMi, all giants are well within their Roche lobe and that mass transfer likely takes place via stellar wind. Our interferometric data provide further evidence that the giant in ZZ CMi (nearly) fills its Roche lobe. Our conclusions are still hampered by the poor characterisation of some of the giants or their binary orbit, and we encourage the community to make an effort to provide these.