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HST/COS Spectra of DF Tau and V4046 Sgr: First Detection of Molecular Hydrogen Absorption Against the Lyα Emission Line

  • Authors: Hao Yang, Jeffrey L. Linsky, and Kevin France

Yang, Linsky, & France 2011 The Astrophysical Journal Letters 730 L10.

  • Provider: AAS Journals

Caption: Figure 4.

Schematic of the V4046 Sgr system, which is not drawn to scale. The blue wavy arrows represent stellar and reflected Lyα photons, and the red wavy arrows represent the fluorescent H 2 photons. The dust disk begins at 0.18 AU from the star, according to Jensen & Mathieu (1997). The short black arrows indicate the flow direction along the accretion funnels. The long black and gray arrows point to our line of sight, which is at ~35° with respect to the rotation axis of the disk. The long black arrow indicates that there is more reflected light from the inner edge of the gas disk that faces toward our line of sight than that from the opposite side, which is indicated by the long gray arrow, because of absorption through the disk along this line of sight.

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