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LTI-MATISSE L- and N-band aperture-synthesis imaging of the unclassified B[e] star FS Canis Majori

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Autor(es):
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Hofmann, K-H [1] ; Bensberg, A. [2] ; Schertl, D. [1] ; Weigelt, G. [1] ; Wolf, S. [2] ; Meilland, A. [3] ; Millour, F. [3] ; Waters, L. B. F. M. [4, 5] ; Kraus, S. [6] ; Ohnaka, K. [7] ; Lopez, B. [3] ; Petrov, R. G. [3] ; Lagarde, S. [3] ; Berio, Ph [3] ; Allouche, F. [3] ; Robbe-Dubois, S. [3] ; Jaffe, W. [8] ; Henning, Th [9] ; Paladini, C. [10] ; Schoeller, M. [11] ; Merand, A. [11] ; Glindemann, A. [11] ; Beckmann, U. [1] ; Heininger, M. [1] ; Bettonvil, F. [12] ; Zins, G. [10] ; Woillez, J. [11] ; Bristow, P. [11] ; Stee, P. [3] ; Vakili, F. [3] ; van Boekel, R. [9] ; Hogerheijde, M. R. [8, 13] ; Dominik, C. [13] ; Augereau, J-C [14] ; Matter, A. [3] ; Hron, J. [15] ; Pantin, E. [16] ; Rivinius, Th [10] ; De Wit, W-J [10] ; Varga, J. [8, 17] ; Klarmann, L. [9] ; Meisenheimer, K. [9] ; Rosas, V. Gamez [8] ; Burtscher, L. [8] ; Leftley, J. [3] ; Isbell, J. W. [9] ; Yoffe, G. [9] ; Kokoulina, E. [3] ; Danchi, W. C. [18, 3] ; Cruzalebes, P. [3] ; Domiciano de Souza, A. [3] ; Drevon, J. [3] ; Hocde, V [3] ; Kreplin, A. [6] ; Labadie, L. [19] ; Connot, C. [1] ; Nussbaum, E. [1] ; Lehmitz, M. [9] ; Antonelli, P. [3] ; Graser, U. [9] ; Leinert, C. [9]
Número total de Autores: 61
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[1] Max Planck Inst Radio Astron, Hugel 69, D-53121 Bonn - Germany
[2] Univ Kiel, Inst Theoret Phys & Astrophys, Leibnizstr 15, D-24118 Kiel - Germany
[3] Univ Cote dAzur, Lab Lagrange, Observ Cote dAzur, CNRS, Blvd Observ, CS 34229, F-06304 Nice 4 - France
[4] SRON Netherlands Inst Space Res, Sorbonnelaan 2, NL-3584 CA Utrecht - Netherlands
[5] Radboud Univ Nijmegen, Inst Math Astrophys & Particle Phys, POB 9010, MC 62, NL-6500 GL Nijmegen - Netherlands
[6] Univ Exeter, Sch Phys, Astrophys Grp, Stocker Rd, Exeter EX4 4QL, Devon - England
[7] Univ Andres Bello, Fac Ciencias Exactas, Dept Ciencias Fis, Fernandez Concha 700, Santiago - Chile
[8] Leiden Univ, Leiden Observ, Niels Bohrweg 2, NL-2333 CA Leiden - Netherlands
[9] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg - Germany
[10] European Southern Observ, Casilla 19001, Santiago 19 - Chile
[11] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching - Germany
[12] ASTRON, Dwingeloo - Netherlands
[13] Univ Amsterdam, Anton Pannekoek Inst Astron, Sci Pk 904, NL-1090 GE Amsterdam - Netherlands
[14] Univ Grenoble Alpes, IPAG, CNRS, F-38000 Grenoble - France
[15] Univ Vienna, Dept Astrophys, Turkenschanzstr 17, A-1180 Vienna - Austria
[16] Univ Paris Saclay, Univ Paris Diderot, Sorbonne Paris Cite, AIM, CEA, CNRS, F-91191 Gif Sur Yvette - France
[17] Res Ctr Astron & Earth Sci, Konkoly Observ, Konkoly Thege Miklosut 15-17, H-1121 Budapest - Hungary
[18] NASA GSFC, Astrophys Sci Div, Greenbelt, MD 20771 - USA
[19] Univ Cologne, Phys Inst 1, Zulpicher Str 77, D-50937 Cologne - Germany
Número total de Afiliações: 19
Tipo de documento: Artigo Científico
Fonte: Astronomy & Astrophysics; v. 658, FEB 3 2022.
Citações Web of Science: 0
Resumo

Context. FS Canis Majoris (FS CMa, HD 45677) is an unclassified B{[}e] star surrounded by an inclined dust disk. The evolutionary stage of FS CMa is still debated. Perpendicular to the circumstellar disk, a bipolar outflow was detected. Infrared aperture-synthesis imaging provides us with a unique opportunity to study the disk structure. Aims. Our aim is to study the intensity distribution of the disk of FS CMa in the mid-infrared L and N bands. Methods. We performed aperture-synthesis imaging of FS CMa with the MATISSE instrument (Multi AperTure mid-Infrared SpectroScopic Experiment) in the low spectral resolution mode to obtain images in the L and N bands. We computed radiative transfer models that reproduce the L- and N-band intensity distributions of the resolved disks. Results. We present L- and N-band aperture-synthesis images of FS CMa reconstructed in the wavelength bands of 3.4-3.8 and 8.6-9.0 mu m. In the L-band image, the inner rim region of an inclined circumstellar disk and the central object can be seen with a spatial resolution of 2.7 milliarcsec (mas). An inner disk cavity with an angular diameter of similar to 6 x 12 mas is resolved. The L-band disk consists of a bright northwestern (NW) disk region and a much fainter southeastern (SE) region. The images suggest that we are looking at the bright inner wall of the NW disk rim, which is on the far side of the disk. In the N band, only the bright NW disk region is seen. In addition to deriving the inclination and the inner disk radius, fitting the reconstructed brightness distributions via radiative transfer modelling allows one to constrain the innermost disk structure, in particular the shape of theinner disk rim. (AU)

Processo FAPESP: 17/18191-8 - Formação de estrelas de alta massa: a massa do objeto central e a física da acreção
Beneficiário:Felipe Donizeti Teston Navarete
Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 19/02029-2 - Eta Carinae: uma passagem periástrica perfeita em 2020
Beneficiário:Augusto Damineli Neto
Modalidade de apoio: Auxílio à Pesquisa - Regular