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Observations unveil an ionized halo of planetary nebula IC 5148 5nvklj





Observations unveil an ionized halo of planetary nebula IC 5148 9tpt39

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Observations unveil an ionized halo of planetary nebula IC 5148

Dragon
Dragon
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Observations unveil an ionized halo of planetary nebula IC 5148 Empty Observations unveil an ionized halo of planetary nebula IC 5148

Post by Dragon Wed Oct 17, 2018 5:33 pm

Using ESO's Very Large Telescope (VLT), astronomers have performed observations of the planetary nebula IC 5148. The new study, described in a paper published October 2 on the arXiv pre-print server, unveils the presence of IC 5148 ionized halo and provides fundamental parameters of its central star.

Planetary nebulae (PNe) are expanding shells of gas and dust that have been ejected from a star during the process of its evolution from main sequence star into a red giant or white dwarf. They are relatively rare, but important for astronomers studying the chemical evolution of stars and galaxies. Although IC 5148, a round planetary nebula, was discovered in 1894, it is still not well investigated in detail. The nebula is located in the constellation of Grus, some 3,000 light years away from the Earth. With an expansion rate of about 50 km/s, it is one of the fastest planetary nebulae known to date.

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Observations unveil an ionized halo of planetary nebula IC 5148 334pu7m
Dragon
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Observations unveil an ionized halo of planetary nebula IC 5148 Empty Re: Observations unveil an ionized halo of planetary nebula IC 5148

Post by Dragon Wed Oct 17, 2018 5:35 pm

Observations unveil an ionized halo of planetary nebula IC 5148 3-observations
Credit: Barría et al., 2018.

The [O iii] image of the halo region of IC 5148: Left: after masking the main nebula and removing a Gaussian shaped decline representing the normal halo intensity distribution. Right: same image with two circles centered exactly at the CSPN at 115 and 128''.

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Observations unveil an ionized halo of planetary nebula IC 5148 334pu7m
Dragon
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Observations unveil an ionized halo of planetary nebula IC 5148 Empty Re: Observations unveil an ionized halo of planetary nebula IC 5148

Post by Dragon Wed Oct 17, 2018 5:35 pm



A planetary nebula is a phase of stellar evolution that the sun should experience several billion years from now, when it expands to become a red giant.


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Observations unveil an ionized halo of planetary nebula IC 5148 334pu7m

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