DISCOVERY OF AN INNER DISK COMPONENT AROUND HD 141569 A

被引：32

作者：

Konishi, Mihoko ^{[1
]}

Grady, Carol A. ^{[2
,3
]}

Schneider, Glenn ^{[4
]}

Shibai, Hiroshi ^{[1
]}

McElwain, Michael W. ^{[3
]}

Nesvold, Erika R. ^{[5
]}

Kuchner, Marc J. ^{[3
]}

Carson, Joseph ^{[6
]}

Debes, John. H. ^{[7
]}

Gaspar, Andras ^{[4
]}

Henning, Thomas K. ^{[8
]}

Hines, Dean C. ^{[7
]}

Hinz, Philip M. ^{[4
]}

Jang-Condell, Hannah ^{[9
]}

Moro-Martin, Amaya ^{[7
]}

Perrin, Marshall ^{[7
]}

Rodigas, Timothy J. ^{[5
]}

Serabyn, Eugene ^{[10
]}

Silverstone, Murray D. ^{[2
]}

Stark, Christopher C. ^{[7
]}

Tamura, Motohide ^{[11
]}

Weinberger, Alycia J.

Wisniewski, John. P. ^{[12
]}

机构：

[1] Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, Osaka, Japan

[2] Eureka Sci, Oakland, CA USA

[3] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA

[4] Univ Arizona, Tucson, AZ USA

[5] Carnegie Inst Sci, Washington, DC 20005 USA

[6] Coll Charleston, Charleston, SC 29401 USA

[7] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

[8] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[9] Univ Wyoming, Laramie, WY 82071 USA

[10] CALTECH, Jet Prop Lab, Pasadena, CA USA

[11] Univ Tokyo, Tokyo, Japan

[12] Univ Oklahoma, Norman, OK 73019 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2016年 / 818卷 / 02期

基金：

美国国家科学基金会;

关键词：

circumstellar matter; stars: imaging; stars: individual (HD 141569 A); CIRCUMSTELLAR DISK; DEBRIS DISK; MOLECULAR GAS; HD-141569; ASYMMETRIES; STARS; EXOPLANETS; REDUCTION; EMISSION; IMAGES;

D O I：

10.3847/2041-8205/818/2/L23

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of a scattering component around the HD 141569 A circumstellar debris system, interior to the previously known inner ring. The discovered inner disk component, obtained in broadband optical light with Hubble Space Telescope/Space Telescope Imaging Spectrograph coronagraphy, was imaged with an inner working angle of 0 25, and can be traced from 0 ''.4 (similar to 46 AU) to 1 ''.0 (similar to 116 AU) after deprojection using i = 55 degrees. The inner disk component is seen to forward scatter in a manner similar to the previously known rings, has a pericenter offset of similar to 6 AU, and break points where the slope of the surface brightness changes. It also has a spiral arm trailing in the same sense as other spiral arms and arcs seen at larger stellocentric distances. The inner disk spatially overlaps with the previously reported warm gas disk seen in thermal emission. We detect no point sources within 2 ''(similar to 232 AU), in particular in the gap between the inner disk component and the inner ring. Our upper limit of 9 +/- 3 M-J is augmented by a new dynamical limit on single planetary mass bodies in the gap between the inner disk component and the inner ring of 1 M-J, which is broadly consistent with previous estimates.

引用

页数：8

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