Constraining the wind launching region in Herbig Ae stars: AMBER/VLTI spectroscopy of HD 104237
Tatulli, E; Isella, A; Natta, A; et al.Testi, L; Marconi, A; Malbet, F; Stee, P; Petrov, RG; Millour, F; Chelli, A; Duvert, G; Antonelli, P; Beckmann, U; Bresson, Y; Dugué, M; Gennari, S; Glück, L; Kern, P; Lagarde, S; Le Coarer, E; Lisi, F; Perraut, K; Puget, P; Rantakyrö, F; Robbe-Dubois, S; Roussel, A; Weigelt, G; Zins, G; Accardo, M; Acke, B; Agabi, K; Altariba, E; Arezki, B; Aristidi, E; Baffa, C; Behrend, J; Blöcker, T; Bonhomme, S; Busoni, S; Cassaing, F; Clausse, J-M; Colin, J; Connot, C; Delboulbé, A; Domiciano de Souza, A; Driebe, T; Feautrier, P; Ferruzzi, D; Forveille, T; Fossat, E; Foy, R; Fraix-Burnet, D; Gallardo, A; Giani, E; Gil, C; Glentzlin, A; Heiden, M; Heininger, M; Hernandez Utrera, O; Hofmann, K-H; Kamm, D; Kiekebusch, M; Kraus, S; Le Contel, D; Le Contel, J-M; Lesourd, T; Lopez, B; Lopez, M; Magnard, Y; Mars, G; Martinot-Lagarde, G; Mathias, P; Mège, P; Monin, J-L; Mouillet, D; Mourard, D; Nussbaum, E; Ohnaka, K; Pacheco, J; Perrier, C; Rabbia, Y; Rebattu, S; Reynaud, F; Richichi, A; Robini, A; Sacchettini, M; Schertl, D; Schöller, M; Solscheid, W; Spang, A; Stefanini, P; Tallon, M; Tallon-Bosc, I; Tasso, D; Vakili, F; von der Lühe, O; Valtier, J-C; Vannier, M; Ventura, N
Date: 12 September 2006
Astronomy and Astrophysics
EDP Sciences for European Southern Observatory (ESO)
Aims. We investigate the origin of the Brγ emission of the Herbig Ae star HD 104237 on Astronomical Unit (AU) scales. Methods. Using AMBER/VLTI at a spectral resolution R = 1500 we spatially resolve the emission in both the Brγ line and the adjacent continuum. Results. The visibility does not vary between the continuum and the Brγ ...
Aims. We investigate the origin of the Brγ emission of the Herbig Ae star HD 104237 on Astronomical Unit (AU) scales. Methods. Using AMBER/VLTI at a spectral resolution R = 1500 we spatially resolve the emission in both the Brγ line and the adjacent continuum. Results. The visibility does not vary between the continuum and the Brγ line, even though the line is strongly detected in the spectrum, with a peak intensity 35% above the continuum. This demonstrates that the line and continuum emission have similar size scales. We assume that the K-band continuum excess originates in a “puffed-up” inner rim of the circumstellar disk, and discuss the likely origin of Brγ. Conclusions. We conclude that this emission most likely arises from a compact disk wind, launched from a region 0.2–0.5 AU from the star, with a spatial extent similar to that of the near infrared continuum emission region, i.e., very close to the inner rim location.
Physics and Astronomy
College of Engineering, Mathematics and Physical Sciences
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