Herschel/PACS view of disks around low-mass stars and brown dwarfs in the TW Hydrae association
文献类型：期刊论文
| 作者 | Liu, Yao1,2 ; Herczeg, Gregory J.3; Gong, Munan4,5; Allers, Katelyn N.6; Brown, Joanna M.7; Kraus, Adam L.8; Liu, Michael C.9; Shkolnik, Evgenya L.10; van Dishoeck, Ewine F.11,12
|
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2015 |
| 卷号 | 573页码:A63 |
| 关键词 | stars: low-mass circumstellar matter brown dwarfs protoplanetary disks |
| 英文摘要 | We conducted Herschel/PACS observations of five very low-mass stars or brown dwarfs located in the TW Hya association with the goal of characterizing the properties of disks in the low stellar mass regime. We detected all five targets at 70 mu m and 100 mu m and three targets at 160 mu m. Our observations, combined with previous photometry from 2MASS, WISE, and SCUBA-2, enabled us to construct spectral energy distributions (SEDs) with extended wavelength coverage. Using sophisticated radiative transfer models, we analyzed the observed SEDs of the five detected objects with a hybrid fitting strategy that combines the model grids and the simulated annealing algorithm and evaluated the constraints on the disk properties via the Bayesian inference method. The modeling suggests that disks around low-mass stars and brown dwarfs are generally flatter than their higher mass counterparts, but the range of disk mass extends to well below the value found in T Tauri stars, and the disk scale heights are comparable in both groups. The inferred disk properties (i.e., disk mass, flaring, and scale height) in the low stellar mass regime are consistent with previous findings from large samples of brown dwarfs and very low-mass stars. We discuss the dependence of disk properties on their host stellar parameters and find a significant correlation between the Herschel far-IR fluxes and the stellar effective temperatures, probably indicating that the scaling between the stellar and disk masses (i.e., M-disk proportional to M-star) observed mainly in low-mass stars may extend down to the brown dwarf regime. |
| 学科主题 | 天文和天体物理 |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SPECTRAL ENERGY-DISTRIBUTIONS ; INTERSTELLAR SILICATE MINERALOGY ; CIRCUMSTELLAR DUST DISKS ; YOUNG SUBSTELLAR OBJECTS ; GOULD BELT SURVEY ; PROTOPLANETARY DISKS ; RADIATIVE-TRANSFER ; RHO-OPHIUCHI ; EVOLUTIONARY MODELS ; STELLAR OBJECTS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000346901300076 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/14802]  |
| 专题 | 紫金山天文台_暗物质和空间天文实验室 |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China 3.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 4.Tsinghua Univ, Beijing 100084, Peoples R China 5.Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA 6.Bucknell Univ, Dept Phys & Astron, Lewisburg, PA 17837 USA 7.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 8.Univ Texas Austin, Dept Astron, Austin, TX 78712 USA 9.Univ Hawaii Manoa, Inst Astron, Honolulu, HI 96822 USA 10.Lowell Observ, Flagstaff, AZ 86001 USA |
| 推荐引用方式 GB/T 7714 | Liu, Yao,Herczeg, Gregory J.,Gong, Munan,et al. Herschel/PACS view of disks around low-mass stars and brown dwarfs in the TW Hydrae association[J]. ASTRONOMY & ASTROPHYSICS,2015,573:A63. |
| APA | Liu, Yao.,Herczeg, Gregory J..,Gong, Munan.,Allers, Katelyn N..,Brown, Joanna M..,...&van Dishoeck, Ewine F..(2015).Herschel/PACS view of disks around low-mass stars and brown dwarfs in the TW Hydrae association.ASTRONOMY & ASTROPHYSICS,573,A63. |
| MLA | Liu, Yao,et al."Herschel/PACS view of disks around low-mass stars and brown dwarfs in the TW Hydrae association".ASTRONOMY & ASTROPHYSICS 573(2015):A63. |
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。