Imaging the bipolar nebula around HM Sagittae

Details Imaging the bipolar nebula around HM Sagittae Imaging the bipolar nebula around HM Sagittae

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105.1273h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 693, p. 1273-1278

Astronomy and Astrophysics

Astronomy

15

Nebulae, Stellar Envelopes, Symbiotic Stars, Ultraviolet Astronomy, Ultraviolet Photometry, Data Reduction, Faint Object Camera, Hubble Space Telescope, Image Analysis, Iue, Radio Observation

Scientific paper

Hubble Space Telescope (HST) Faint Object Camera (FOC) UV images are presented for HM Sagittae showing a bipolar optical nebula similar to that in R Aquarii and RX Puppis. The nebula extends to a distance of 0.174 arcsec with a P.A. of 135 deg inside a faint halo extending to a radius of 0.28 arcsec. A kinematical distance to HM Sge based on positions of features in the nebula is found to be 1.78 +/- 0.1 kpc. Comparisons between our UV images, radio maps taken in 1982, and IUE spectra all demonstrate that this system is still undergoing dramatic changes.

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