Investigating the young solar system analog HD 95086 A combined HARPS and SPHERE exploration

被引：40

作者：

Chauvin, G. ^{[1
,2
,3
]}

Gratton, R. ^{[4
]}

Bonnefoy, M. ^{[1
]}

Lagrange, A. -M. ^{[1
]}

de Boer, J. ^{[5
]}

Vigan, A. ^{[6
]}

Beust, H. ^{[1
]}

Lazzoni, C. ^{[4
]}

Boccaletti, A. ^{[7
]}

Galicher, R. ^{[7
]}

Desidera, S. ^{[4
]}

Delorme, P. ^{[1
]}

Keppler, M. ^{[8
]}

Lannier, J. ^{[1
]}

Maire, A. -L. ^{[8
]}

Mesa, D. ^{[4
,21
]}

Meunier, N. ^{[1
]}

Kral, Q. ^{[7
]}

Henning, T. ^{[8
]}

Menard, F. ^{[1
]}

Moor, A. ^{[9
]}

Avenhaus, H. ^{[10
]}

Bazzon, A. ^{[10
]}

Janson, M. ^{[8
,11
]}

Beuzit, J. -L. ^{[1
]}

Bhowmik, T. ^{[7
]}

Bonavita, M. ^{[12
]}

Borgniet, S. ^{[7
]}

Brandner, W. ^{[8
]}

Cheetham, A. ^{[13
]}

Cudel, M. ^{[1
]}

Feldt, M. ^{[8
]}

Fontanive, C. ^{[12
]}

Ginski, C. ^{[14
]}

Hagelberg, J. ^{[1
]}

Janin-Potiron, P. ^{[15
]}

Lagadec, E. ^{[15
]}

Langlois, M. ^{[6
,16
]}

Le Coroller, H. ^{[6
]}

Messina, S. ^{[17
]}

Meyer, M. ^{[9
]}

Mouillet, D. ^{[1
]}

Peretti, S. ^{[13
]}

Perrot, C. ^{[7
]}

Rodet, L. ^{[1
]}

Samland, M. ^{[8
]}

Sissa, E. ^{[4
]}

Olofsson, J. ^{[8
,18
]}

Salter, G. ^{[6
]}

Schmidt, T. ^{[6
]}

机构：

[1] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France

[2] Univ Chile, CNRS INSU UMI 3386, Unidad Mixta Int Franco Chilena Astron, Casilla 36-D, Santiago, Chile

[3] Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile

[4] INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy

[5] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands

[6] Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France

[7] UPMC Univ Paris 06, Univ Paris Diderot, Sorbonne Paris Cite, LESIA,Observ Paris,PSL Res Univ,CNRS,Sorbonne Uni, 5 Pl Jules Janssen, F-92195 Meudon, France

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

[9] Hungarian Acad Sci, Res Ctr Astron & Earth Sci, Konkoly Observ, POB 67, H-1525 Budapest, Hungary

[10] Swiss Fed Inst Technol, Inst Astron, Wolfgang Pauli Str 27, CH-8093 Zurich, Switzerland

[11] Stockholm Univ, AlbaNova Univ Ctr, Dept Astron, S-10691 Stockholm, Sweden

[12] Univ Edinburgh, Royal Observ, Inst Astron, SUPA, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland

[13] Univ Geneva, Observ Geneva, Chemin Mailettes 51, CH-1290 Versoix, Switzerland

[14] Astron Inst Anton Pannekoek, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands

[15] Univ Cote dAzur, OCA, CNRS, Lagrange, France

[16] Univ Lyon, Ecole Normale Super Lyon, CNRS, CRAL,UMR 5574, 46 Allee Italie, F-69364 Lyon 07, France

[17] INAF Catania Astrophys Observ, Via S Sofia 78, I-95123 Catania, Italy

[18] Univ Valparaiso, Nucleo Milenio Formac Planetaria NPF, Ave Gran Bretana 1111, Valparaiso, Chile

[19] Univ Diego Portales, Fac Ingn & Ciencias, Nucleo Astron, Ave Ejercito 441, Santiago, Chile

[20] Univ Diego Portales, Fac Ingn & Ciencias, Escuela Ingn Ind, Ave Ejercito 441, Santiago, Chile

[21] Univ Atacama, INCT, Calle Copayapu 485, Copiapo, Atacama, Chile

来源：

ASTRONOMY & ASTROPHYSICS | 2018年 / 617卷

关键词：

instrumentation: adaptive optics; instrumentation: high angular resolution; methods: observational; stars:individual: HD 95086; planet-disk interactions; BROWN DWARF COMPANION; VERY-LOW-MASS; EXTREMELY RED; T-DWARFS; EXTRASOLAR PLANETS; DEBRIS DISCS; FIELD L; DISCOVERY; NEARBY; CANDIDATE;

D O I：

10.1051/0004-6361/201732077

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. HD 95086 (A8V, 17 Myr) hosts a rare planetary system for which a multi-belt debris disk and a giant planet of 4-5 Mjup have been directly imaged. Aims. Our study aims to characterize the global architecture of this young system using the combination of radial velocity and direct imaging observations. We want to characterize the physical and orbital properties of HD 95086 b, search for additional planets at short and wide orbits and image the cold outer debris belt in scattered light. Methods. We used HARPS at the ESO 3.6 m telescope to monitor the radial velocity of HD 95086 over two years and investigate the existence of giant planets at less than 3 au orbital distance. With the IRDIS dual-band imager and the IFS integral field spectrograph of SPHERE at VLT, we imaged the faint circumstellar environment beyond 10 au at six epochs between 2015 and 2017. Results. We do not detect additional giant planets around HD 95086. We identify the nature (bound companion or background contaminant) of all point-like sources detected in the IRDIS field of view. None of them correspond to the ones recently discovered near the edge of the cold outer belt by ALMA. HD 95086 b is resolved for the first time in J-band with IFS. Its near-infrared spectral energy distribution is well fitted by a few dusty and/or young L7-L9 dwarf spectral templates. The extremely red 1-4 mu m spectral distribution is typical of low-gravity objects at the L/T spectral type transition. The planet's orbital motion is resolved between January 2015 and May 2017. Together with past NaCo measurements properly re-calibrated, our orbital fitting solutions favor a retrograde low to moderate-eccentricity orbit e = 0.2(-0.2)(+0.3), with a semi-major axis similar to 52 au corresponding to orbital periods of similar to 288 yr and an inclination that peaks at i = 141 degrees, which is compatible with a planet-disk coplanar configuration. Finally, we report the detection in polarimetric differential imaging of the cold outer debris belt between 100 and 300 au, consistent in radial extent with recent ALMA 1.3 mm resolved observations.

引用

页数：22

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