Arid
DOI10.1093/mnras/stv1619
Resolving structure of the disc around HD100546 at 7 mm with ATCA
Wright, C. M.1; Maddison, S. T.2; Wilner, D. J.3; Burton, M. G.4; Lommen, D.5; van Dishoeck, E. F.6; Pinilla, P.6; Bourke, T. L.7; Menard, F.8; Walsh, C.6
通讯作者Wright, C. M.
来源期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
EISSN1365-2966
出版年2015
卷号453期号:1页码:414-438
英文摘要

There is much evidence that planet formation is occurring in the disc around the Herbig Be star HD100546. To learn more about the processes occurring in this disc, we conducted high-resolution imaging at 43/45 GHz with the Australia Telescope Compact Array. Multiple array configurations were used, providing a best spatial resolution of similar to 0.15 arcsec, or 15 au at HD100546’s distance of similar to 100 pc. Significant structure is revealed, but its precise form is dependent on the u - v plane sampling used for the image reconstruction. At a resolution of <= 30 au, we detected an inner gap in the disc with a radius of similar to 25 au and a position angle approximately along the known disc major axis. With different weighting, and an achieved resolution of similar to 15 au, emission appears at the centre and the disc takes on the shape of an incomplete ring, much like a horseshoe, again with a gap radius of similar to 25 au. The position angle of the disc major axis and its inclination from face-on are determined to be 140 degrees +/- 5 degrees and 40 degrees +/- 5 degrees, respectively. The similar to 25 au gap radius is confirmed by a null in the real part of the binned visibilities at 320 +/- 10 k lambda, whilst the non-axisymmetric nature is also confirmed through significant structure in the imaginary component. The emission mechanism at the central peak is most likely to be free-free emission from a stellar or disc wind. Overall our data support the picture of at least one, but probably several, giant planets orbiting HD100546 within 25 au.


英文关键词protoplanetary discs circumstellar matter planetary systems stars: pre-main-sequence radio continuum: stars
类型Article
语种英语
国家Australia ; USA ; Singapore ; Netherlands ; England ; Chile
收录类别SCI-E
WOS记录号WOS:000366215500035
WOS关键词HERBIG-AE/BE STARS ; T-TAURI STARS ; PLANET-FINDING CAMPAIGN ; BROWN DWARF DESERT ; NEAR-INFRARED SPECTROSCOPY ; RADIO-CONTINUUM EMISSION ; EXTRASOLAR GIANT PLANETS ; INTERMEDIATE-MASS STARS ; X-RAY-EMISSION ; HD 100546 B
WOS类目Astronomy & Astrophysics
WOS研究方向Astronomy & Astrophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/189270
作者单位1.UNSW ADFA, Sch Phys Environm & Math Sci, Canberra, ACT 2600, Australia;
2.Swinburne Univ, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia;
3.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA;
4.Univ New S Wales, Sch Phys, Sydney, NSW 2000, Australia;
5.Hwa Chong Inst, Singapore 269734, Singapore;
6.Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands;
7.Jodrell Bank Observ, SKA Org, Macclesfield SK11 9DL, Cheshire, England;
8.Univ Chile, Millenium Nucl Protoplanetary Disks ALMA Early Sc, Santiago, Chile
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GB/T 7714
Wright, C. M.,Maddison, S. T.,Wilner, D. J.,et al. Resolving structure of the disc around HD100546 at 7 mm with ATCA[J],2015,453(1):414-438.
APA Wright, C. M..,Maddison, S. T..,Wilner, D. J..,Burton, M. G..,Lommen, D..,...&Walsh, C..(2015).Resolving structure of the disc around HD100546 at 7 mm with ATCA.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,453(1),414-438.
MLA Wright, C. M.,et al."Resolving structure of the disc around HD100546 at 7 mm with ATCA".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 453.1(2015):414-438.
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