Physics
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7840k&link_type=abstract
HST Proposal ID #7840
Physics
Hst Proposal Id #7840 Interstellar And Intergalactic Media
Scientific paper
The origin of the rich variety of morphologies observed in planetary nebulae {PN} is one of the major unsolved problems in stellar evolution. While major progress has been made on the shaping of PN by the interacting winds theory, the cause of the asymmetry is not understood. Observations of proto- planetary nebulae {PPN} may hold the key to this problem. By studying the shapes of PPN, we can determine the extent of shaping in this early phase of evolution. In the past ten years, we have identified many new candidates of PPN, some of which have been found to have bipolar morphologies based on our previous ground-based {CHFT} and HST WFPC2 observations. In this proposal, we wish to obtain high resolution H and K band images of these bipolar nebulae to reveal their inner and outer {halo} structures in greater detail, and to use polarimetry to determine the distribution of dust grains and to reveal the location of the central stars. Some of the objects show great resemblance to the Egg Nebula, which has recently been observed by NICMOS to have a remarkable cross- like pattern of molecular H_2 knots. We propose to obtain an H_2 image for 3 PPN.
No associations
LandOfFree
Near-IR Imaging and Polarimetry of Bipolar Proto-Planetary Nebulae does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Near-IR Imaging and Polarimetry of Bipolar Proto-Planetary Nebulae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Near-IR Imaging and Polarimetry of Bipolar Proto-Planetary Nebulae will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-896311