Long-slit spectroscopic study of the bipolar reflection nebula M 1-92 : detection of compact Herbig-Haro condensations in the lobes.
Abstract
Long-slit spectrograms of high spatial and medium/high spectral resolution obtained in the visible/near-infrared from the bipolar nebula M 1-92 are presented. The data permit us to identify and to separate three different spectral components: (1) a 'reflected spectrum' representing light emitted from the central star region and scattered off dust in the lobes; (2) a 'direct spectrum' of the central star region obtained at the position of the star after removing the contamination by the reflected spectrum; (3) an 'intinsic spectrum' representing line emission formed in the bipolar lobes themselves. The bulk of available observations indicates that M 1-92 is an evolved object, probably a protoplanetary nebula in the transition phase from an AGB star to a planetary nebula.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- February 1994
- Bibcode:
- 1994A&A...282..567S
- Keywords:
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- Emission Spectra;
- Herbig-Haro Objects;
- Interstellar Matter;
- Line Spectra;
- Reflection Nebulae;
- Stellar Envelopes;
- Astronomical Spectroscopy;
- Charge Coupled Devices;
- Line Of Sight;
- Spectral Resolution;
- Spectrographs;
- Telescopes;
- Astrophysics