High resolution spectroscopy of the planetary nebula Hubble 12

Details High resolution spectroscopy of the planetary nebula Hubble 12 High resolution spectroscopy of the planetary nebula Hubble 12

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...214..353m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 214, no. 1-2, April 1989, p. 353-359.

Astronomy and Astrophysics

Astrophysics

15

Astronomical Spectroscopy, Planetary Nebulae, Radial Velocity, Emission Spectra, H Alpha Line, Nitrogen, Stellar Envelopes, Stellar Winds

Scientific paper

Long-slit coude spectroscopy of high spectral and high spatial resolution of the planetary nebula Hb 12 has been carried out. The forbidden N II emission-line features detected reveal a compact (0.9-arcsec) central region expanding at about 16 km/s and a fainter, extended (10-arcsec) bipolar formation presenting mass outflow into two wide lobes. In the lobes the N II emission is confined to a thin surface layer. Weak H-alpha emission detected up to 13 arcsec from the center indicates the presence of a halo that can be identified with a circumstellar envelope produced by the red giant progenitor of Hb 12. The deduced mass and kinematic age of Hb 12 confirm that the planetary nebula is very young.

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