Speckle observations of the ice feature in the young double source Serpens SVS 20

Astronomy and Astrophysics – Astronomy

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Absorption Spectra, Double Stars, Ice, Infrared Sources (Astronomy), Molecular Clouds, Speckle Interferometry, Angular Resolution, Main Sequence Stars, Near Infrared Radiation, Stellar Temperature

Scientific paper

One-dimensional near-infrared speckle observations of the ice feature of the low-luminosity infrared double source Serpens SVS 220 are reported. The depth of the 3.1-micron feature is found to be the same for both components of SVS 20, suggesting that the ice-carrying grains belong to the material distributed on a larger scale within the Serpens molecular cloud. The results indicate that the two components of SVS 20 may suffer similar optical extinctions and have a similar intrinsic energy distribution. It is suggested that both stars of SVS 20 have not yet reached the T Tauri stage and may still be embedded in circumstellar dust shells.

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