Astronomy and Astrophysics – Astronomy
Scientific paper
May 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.7207b&link_type=abstract
American Astronomical Society, 188th AAS Meeting, #72.07; Bulletin of the American Astronomical Society, Vol. 28, p.944
Astronomy and Astrophysics
Astronomy
Scientific paper
As part of a snapshot survey, the two compact planetary nebulae (PNe) Hu 2-1 and M 1-58 were imaged using HST's Planetary Camera. The images show, for the first time, the spatial structure of these young PNe. M 1-58 was imaged in Hβ and shows a partially filled circular shell with an angular radius of 1.('') 7 and a thickness of 1('') . There is also a halo extending out 4('') from the center. At an estimated distance of 4 kpc, the radius of the shell is 0.033 pc. Hu 2-1 was imaged using two filters --- Hβ and [O III] 5007 Angstroms. Hu 2-1 displays an equatorial ring with bubbles of gas above and below the ring. The dimensions of the ring are 1.('') 5 x 0.('') 73 which, if actually circular, implies a tilt of 60deg . The bubbles extend 2.('') 2 from the central star and a halo, brighter in the equatorial plane, extends out several arc-seconds further. The morphologies of He 2-1 and M 1-58 are quite different. M 1-58 appears rather amorphous, circularly symmetric, and filamentary. Hu 2-1, on the other hand, is quite asymmetric, and bears a striking resemblance to He 3-1357 --- another compact PN that was spatially resolved in the same snapshot survey. These observations were made with the NASA/ESA Hubble Space Telescope and obtained at the Space Telescope Science Institute which is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS5-26555. Support for this work was provided by NASA through grant number GO-3603.01-91A from the Space Telescope Science Institute.
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