Hofmann, K-H, Bensberg, A., Schertl, D., Weigelt, G., Wolf, S., Meilland, A., Millour, F., Waters, L. B. F. M., Kraus, S., Ohnaka, K., Lopez, B., Petrov, R. G., Lagarde, S., Berio, Ph, Allouche, F., Robbe-Dubois, S., Jaffe, W., Henning, Th, Paladini, C., Schoeller, M., Merand, A., Glindemann, A., Beckmann, U., Heininger, M., Bettonvil, F., Zins, G., Woillez, J., Bristow, P., Stee, P., Vakili, F., van Boekel, R., Hogerheijde, M. R., Dominik, C., Augereau, J-C, Matter, A., Hron, J., Pantin, E., Rivinius, Th, De Wit, W-J, Varga, J., Klarmann, L., Meisenheimer, K., Rosas, V. Gamez, Burtscher, L., Leftley, J., Isbell, J. W., Yoffe, G., Kokoulina, E., Danchi, W. C., Cruzalebes, P., Domiciano de Souza, A., Drevon, J., Hocde, V, Kreplin, A., Labadie, L., Connot, C., Nussbaum, E., Lehmitz, M., Antonelli, P., Graser, U. and Leinert, C. (2022). VLTI-MATISSE L- and N-band aperture-synthesis imaging of the unclassified B[e] star FS Canis Majoris. Astron. Astrophys., 658. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 1432-0746

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Abstract

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.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Hofmann, K-HUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bensberg, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schertl, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Weigelt, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wolf, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Meilland, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Millour, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Waters, L. B. F. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kraus, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ohnaka, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lopez, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Petrov, R. G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lagarde, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Berio, PhUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Allouche, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Robbe-Dubois, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jaffe, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Henning, ThUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Paladini, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schoeller, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Merand, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Glindemann, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Beckmann, U.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Heininger, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bettonvil, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zins, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Woillez, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bristow, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stee, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vakili, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van Boekel, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hogerheijde, M. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dominik, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Augereau, J-CUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Matter, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hron, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pantin, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rivinius, ThUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
De Wit, W-JUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Varga, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Klarmann, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Meisenheimer, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rosas, V. GamezUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Burtscher, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Leftley, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Isbell, J. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yoffe, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kokoulina, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Danchi, W. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cruzalebes, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Domiciano de Souza, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Drevon, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hocde, VUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kreplin, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Labadie, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Connot, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nussbaum, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lehmitz, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Antonelli, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Graser, U.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Leinert, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-696908
DOI: 10.1051/0004-6361/202141601
Journal or Publication Title: Astron. Astrophys.
Volume: 658
Date: 2022
Publisher: EDP SCIENCES S A
Place of Publication: LES ULIS CEDEX A
ISSN: 1432-0746
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
DISKS; ENVELOPE; DUST; EVOLUTION; SIZE; RECONSTRUCTION; CONSTRAINTS; TEMPERATURE; EXTINCTION; SUPERGIANTMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/69690

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