用 VLTI/GRAVITY 约束 PDS 70 原行星的性质
地球与行星天体物理
2021-03-03 v2 太阳与恒星天体物理
摘要
我们呈现了利用 VLTI/GRAVITY 对 PDS 70 原行星及其宿主恒星的 K 波段干涉观测。我们在两个历元获得了 PDS 70 b 和 c 的 K 波段光谱及 100 as 精度天体测量，并空间分辨了恒星周围炽热的内盘。在排除不稳定轨道后，我们发现 PDS 70 b 的偏心率非零，为 ，PDS 70 c 为近圆轨道，且轨道构型与行星迁移进入 2:1 平运动共振一致。在施加动力学稳定性约束下，我们得到 PDS 70 b 质量的 95% 上限为 10 ，而 PDS 70 c 的质量未被约束。GRAVITY K 波段光谱排除了两行星光球纯黑体模型。相反，数据支持度最高的模型是含尘的行星大气，但尘埃性质不明。这些行星周围的任何环行星尘埃均未被其 1-5 m 光谱能量分布（SEDs）很好地约束，需更长波长数据以通过 SED 分析探测。然而，借助 VLTI/GRAVITY，我们首次以亚天文单位空间分辨率观测了环行星环境，对 PDS 70 b 周围明亮盘的尺寸给出了 0.3~au 的上限。
引用
@article{arxiv.2101.04187,
title = {Constraining the Nature of the PDS 70 Protoplanets with VLTI/GRAVITY},
author = {J. J. Wang and A. Vigan and S. Lacour and M. Nowak and T. Stolker and R. J. De Rosa and S. Ginzburg and P. Gao and R. Abuter and A. Amorim and R. Asensio-Torres and M. Baubck and M. Benisty and J. P. Berger and H. Beust and J. -L. Beuzit and S. Blunt and A. Boccaletti and A. Bohn and M. Bonnefoy and H. Bonnet and W. Brandner and F. Cantalloube and P. Caselli and B. Charnay and G. Chauvin and E. Choquet and V. Christiaens and Y. Clénet and V. Coudé du Foresto and A. Cridland and P. T. de Zeeuw and R. Dembet and J. Dexter and A. Drescher and G. Duvert and A. Eckart and F. Eisenhauer and S. Facchini and F. Gao and P. Garcia and R. Garcia Lopez and T. Gardner and E. Gendron and R. Genzel and S. Gillessen and J. Girard and X. Haubois and G. Heißel and T. Henning and S. Hinkley and S. Hippler and M. Horrobin and M. Houllé and Z. Hubert and A. Jiménez-Rosales and L. Jocou and J. Kammerer and M. Keppler and P. Kervella and M. Meyer and L. Kreidberg and A. -M. Lagrange and V. Lapeyrère and J. -B. Le Bouquin and P. Léna and D. Lutz and A. -L. Maire and F. Ménard and A. Mérand and P. Mollière and J. D. Monnier and D. Mouillet and A. Müller and E. Nasedkin and T. Ott and G. P. P. L. Otten and C. Paladini and T. Paumard and K. Perraut and G. Perrin and O. Pfuhl and L. Pueyo and J. Rameau and L. Rodet and G. Rodríguez-Coira and G. Rousset and S. Scheithauer and J. Shangguan and T. Shimizu and J. Stadler and O. Straub and C. Straubmeier and E. Sturm and L. J. Tacconi and E. F. van Dishoeck and F. Vincent and S. D. von Fellenberg and K. Ward-Duong and F. Widmann and E. Wieprecht and E. Wiezorrek and J. Woillez and The GRAVITY Collaboration},
journal= {arXiv preprint arXiv:2101.04187},
year = {2021}
}
备注
30 pages, 9 figures, Accepted for publication in AJ