Shadowplay in Hubble's variable nebula

Details Shadowplay in Hubble's variable nebula Shadowplay in Hubble's variable nebula

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.239..665l&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 239, Aug. 1, 1989, p. 665-675.

Astronomy and Astrophysics

Astronomy

24

Early Stars, Interstellar Matter, Reflection Nebulae, Herbig-Haro Objects, Kepler Laws, Protostars, Variability

Scientific paper

Hubble's variable nebula has been reanalyzed in light of recent indications that it is an illuminated cavity swept by the outflow from the young star, R Monocerotis. The results are consistent with the previous theory that the variability is due to shadows cast on the reflection nebula by clouds moving near R Mon. The responsible clouds are shown to have been filamentary, with angular motions suggesting an origin at the protostellar disk within 1 AU of the star and an outward velocity of several tens of km/s. A pattern noted in the quiescent nebula for the past 70 years is identified as the shadow of a second group of filament loops, further from R Mon, some of which can be seen directly in the nebular fan.

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