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Gas dynamics in the inner few AU around the Herbig B[e] star MWC297: Indications of a disk wind from kinematic modeling and velocity-resolved interferometric imaging

Autor: Hone, Edward, Kraus, Stefan, Kreplin, Alexander, Hofmann, Karl-Heinz, Weigelt, Gerd, Harries, Tim, Kluska, Jacques

We present near-infrared AMBER (R = 12, 000) and CRIRES (R = 100, 000) observations of the Herbig B[e] star MWC297 in the hydrogen Br-gamma-line. Using the VLTI unit telescopes, we obtained a uv-coverage suitable for aperture synthesis imaging. We in

Externí odkaz: http://arxiv.org/abs/1709.08467

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Study of the sub-AU disk of the Herbig B[e] star HD 85567 with near-infrared interferometry

Autor: Vural, J., Kraus, S., Kreplin, A., Weigelt, G., Fossat, E., Massi, F., Perraut, K., Vakili, F.

Publikováno v: A&A 569, A25 (2014)

Context: The structure of the inner disk of Herbig Be stars is not well understood. The continuum disks of several Herbig Be stars have inner radii that are smaller than predicted by models of irradiated disks with optically thin holes. Aims: We stud

Externí odkaz: http://arxiv.org/abs/1407.8190

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The VLT-FLAMES Tarantula Survey. XV. VFTS\,822: a candidate Herbig B[e] star at low metallicity

Autor: Kalari, V. M., Vink, J. S., Dufton, P. L., Evans, C. J., Dunstall, P. R., Sana, H., Clark, J. S., Ellerbroek, L., de Koter, A., Lennon, D. J., Taylor, W. D.

We report the discovery of the B[e] star VFTS 822 in the 30 Doradus star-forming region of the Large Magellanic Cloud, classified by optical spectroscopy from the VLT-FLAMES Tarantula Survey and complementary infrared photometry. VFTS 822 is a relati

Externí odkaz: http://arxiv.org/abs/1401.3149

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HD 85567: A Herbig B[e] star or an interacting B[e] binary

Autor: Wheelwright, H. E., Weigelt, G., Garatti, A. Caratti o, Lopez, R. Garcia

Context. HD 85567 is an enigmatic object exhibiting the B[e] phenomenon, i.e. an infrared excess and forbidden emission lines in the optical. The object's evolutionary status is uncertain and there are conflicting claims that it is either a young ste

Externí odkaz: http://arxiv.org/abs/1308.6000

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On the nature of the Herbig B[e] star binary system V921 Scorpii: Geometry and kinematics of the circumprimary disk on sub-AU scales

Autor: Kraus, Stefan, Calvet, Nuria, Hartmann, Lee, Hofmann, Karl-Heinz, Kreplin, Alexander, Monnier, John D., Weigelt, Gerd

V921 Scorpii is a close binary system (separation 0.025") showing the B[e]-phenomenon. The system is surrounded by an enigmatic bipolar nebula, which might have been shaped by episodic mass-loss events, possibly triggered by dynamical interactions be

Externí odkaz: http://arxiv.org/abs/1204.1969

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On the nature of the Herbig B[e] star binary system V921 Scorpii: Discovery of a close companion and relation to the large-scale bipolar nebula

Autor: Kraus, Stefan, Calvet, Nuria, Hartmann, Lee, Hofmann, Karl-Heinz, Kreplin, Alexander, Monnier, John D., Weigelt, Gerd

Belonging to the group of B[e] stars, V921 Scorpii is associated with a strong infrared excess and permitted and forbidden line emission, indicating the presence of low- and high-density circumstellar gas and dust. Many aspects of V921 Sco and other

Externí odkaz: http://arxiv.org/abs/1201.2420

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