Highly structured disk around the planet host PDS70 revealed by high-angular resolution observations with ALMA
文献类型：期刊论文
| 作者 | Keppler, M.1; Teague, R.2; Bae, J.3; Benisty, M.4,5,6; Henning, T.1; van Boekel, R.1; Chapillon, E.7,8; Pinilla, P.9; Williams, J. P.10; Bertrang, G. H. -M.1 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2019-05-22 |
| 卷号 | 625页码:15 |
| 关键词 | stars: individual: PDS 70 techniques: interferometric hydrodynamics planet-disk interactions protoplanetary disks |
| ISSN号 | 1432-0746 |
| DOI | 10.1051/0004-6361/201935034 |
| 通讯作者 | Keppler, M.(keppler@mpia.de) |
| 英文摘要 | Context. Imaged in the gap of a transition disk and found at a separation of about 195 mas (similar to 22 au) from its host star at a position angle of about 155 degrees, PDS 70 b is the most robustly detected young planet to date. This system is therefore a unique laboratory for characterizing the properties of young planetary systems at the stage of their formation. Aims. We aim to trace direct and indirect imprints of PDS 70 b on the gas and dust emission of the circumstellar disk in order to study the properties of this similar to 5 Myr young planetary system. Methods. We obtained ALMA band 7 observations of PDS 70 in dust continuum and (CO)-C-12(3-2) and combined them with archival data. This resulted in an unprecedented angular resolution of about 70 mas (similar to 8 au). Results. We derive an upper limit on circumplanetary material at the location of PDS 70 b of similar to 0.01 M-circle plus and find a highly structured circumstellar disk in both dust and gas. The outer dust ring peaks at 0.65 '' (74 au) and reveals a possible second unresolved peak at about 0.53 '' (60 au). The integrated intensity of CO also shows evidence of a depletion of emission at similar to 0.2 '' (23 au) with a width of similar to 0.1 '' (11 au). The gas kinematics show evidence of a deviation from Keplerian rotation inside less than or similar to 0.8 '' (91 au). This implies a pressure gradient that can account for the location of the dust ring well beyond the location of PDS 70 b. Farther in, we detect an inner disk that appears to be connected to the outer disk by a possible bridge feature in the northwest region in both gas and dust. We compare the observations to hydrodynamical simulations that include a planet with different masses that cover the estimated mass range that was previously derived from near-infrared photometry (similar to 5-9 M-Jup). We find that even a planet with a mass of 10 M-Jup may not be sufficient to explain the extent of the wide gap, and an additional low-mass companion may be needed to account for the observed disk morphology. |
| WOS关键词 | PROTOPLANETS ; ACCRETION ; GRAINS ; GAPS ; MASS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000468784900012 |
| 出版者 | EDP SCIENCES S A |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/26714]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Keppler, M. |
| 作者单位 | 1.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany 2.Univ Michigan, Dept Astron, 311 West Hall,1085 S Univ Ave, Ann Arbor, MI 48109 USA 3.Carnegie Inst Sci, Dept Terr Magnetism, 5241 Broad Branch Rd NW, Washington, DC 20015 USA 4.Univ Chile, Dept Astron, Camino El Observ 1515, Santiago, Chile 5.Univ Chile, CNRS, UMI 3386, Unidad Mixta Int Franco Chilena Astron,Dept Astro, Camino El Observ 1515, Santiago, Chile 6.Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France 7.Inst Radioastron Millimetr IRAM, 300 Rue Piscine, F-38406 St Martin Dheres, France 8.Univ Bordeaux, CNRS, Lab Astrophys Bordeaux, B18N,Allee Geoffroy St Hilaire, F-33615 Pessac, France 9.Univ Arizona, Steward Observ, Dept Astron, 933 North Cherry Ave, Tucson, AZ 85721 USA 10.Univ Hawaii Manoa, Inst Astron, Honolulu, HI 96822 USA |
| 推荐引用方式 GB/T 7714 | Keppler, M.,Teague, R.,Bae, J.,et al. Highly structured disk around the planet host PDS70 revealed by high-angular resolution observations with ALMA[J]. ASTRONOMY & ASTROPHYSICS,2019,625:15. |
| APA | Keppler, M..,Teague, R..,Bae, J..,Benisty, M..,Henning, T..,...&Semenov, D..(2019).Highly structured disk around the planet host PDS70 revealed by high-angular resolution observations with ALMA.ASTRONOMY & ASTROPHYSICS,625,15. |
| MLA | Keppler, M.,et al."Highly structured disk around the planet host PDS70 revealed by high-angular resolution observations with ALMA".ASTRONOMY & ASTROPHYSICS 625(2019):15. |
入库方式： OAI收割
来源：紫金山天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。