Outburst of the illuminating star of the bipolar reflection nebula RNO 138?

Details Outburst of the illuminating star of the bipolar reflection nebula RNO 138? Outburst of the illuminating star of the bipolar reflection nebula RNO 138?

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...289l...7m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 289, no. 1, p. L7-L10

Astronomy and Astrophysics

Astrophysics

3

Absorption Spectra, Flare Stars, H Alpha Line, Reflection Nebulae, Stellar Magnitude, Visible Spectrum, Image Analysis, Pre-Main Sequence Stars, Red Shift, Spectrum Analysis, Stellar Spectrophotometry

Scientific paper

Direct images taken in 1988 and 1993 and spectra of the bipolar reflection nebula RNO 138 are presented. The images show that the illuminating star of the nebula, RNO 138S, for the first time visible in the 1993 image, has brightened by greater than or = -1.2 mag sometime between 1988 and 1993. The spectrum presents absorption lines, including strong LiI 6708, weak H-alpha emission with a possible blueshifted P Cygni absorption and no emission lines. At present, an EXor-type outburst can be excluded as an explanation for the brightening of RNO 138S and the data are not completely compatible with a FUor-type outburst.

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