RNO 1B - A new FUor in Cassiopeia

Astronomy and Astrophysics – Astronomy

Scientific paper

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Absorption Spectra, Astronomical Spectroscopy, Infrared Astronomy Satellite, Nebulae, Stellar Luminosity, Charge Coupled Devices, H Alpha Line, Herbig-Haro Objects, Stellar Composition, Stellar Structure

Scientific paper

GN 00.33.9, on the POSS red print a barely visible nebulosity within the dark cloud L 1287, is now a well defined nebula with cometary shape. The star RNO 1B, which is deeply embedded within this compact nebula, shares all properties defining a FUor: it has brightened by at least 3 mag since 1978 and its spectral type is about F8 II with a broad, variable and blueshifted P Cygni profile at H-alpha and broad, double-peaked and also variable absorption lines, including LiI 6707. The star coincides within errors with the very cold IRAS source 00338 + 6312, which drives a bipolar CO outflow.

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