Phoenix Astronomical Society meetings - July 2011

[The Phoenix Astronomical Society]

Phoenix Astronomical July 2011 meetings

Understanding Tailed Radio Galaxies.
Siamak Dehghan, School of Chemical and Physical Sciences
Victoria University of Wellington

Bent-Tail radio galaxy describes a Fanaroff and Riley Class I (FRI)
radio source that appears to be bent by ram pressure as it moves
through a galaxy cluster. These sources range from double lobed radio
sources in which the lobes are not aligned with the galaxy nucleus
(Wide-Angle-Tail) to sources in which all the radio emission lies in a
tail on one side of the galaxy, and the galaxy itself forms the head
of the tail (Narrow-Angle-Tail or Head-Tail galaxies). The accepted
explanation of head-tail radio galaxies is that they are conventional
radio galaxies moving at a high velocity through a static intracluster
gas. In our present work, we implemented a simple mechanical model on
a recently found Wide-Angle-Tail galaxy in Horologium-Reticulum
Supercluster, to understand that how complex movement of the galaxy in
the windy environment could form the morphology of the Head-Tail
galaxy.

Documentary
How the Universe Works: Episode 6 – Extreme Planets
Exploring the wide variety of planets that make up the universe, from
giant burning gas spheres to icy orphaned worlds, why there are
different types, how they are formed, how many scientists have
discovered and what makes them so different when they are made out of
the same star stuff. Find out what makes the Earth so unique and what
the theory is behind a gas giant’s magnetic field.

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Wellington Society Meeting
Thursday July 28th 7:30pm, Carter Observatory, Wellington

7:30 pm Society News
7:45 pm Understanding Tailed Radio Galaxies
8:45 pm Supper and social time
9:00 pm Documentary: Extreme Planets

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Wairarapa Society Meeting
Friday July 29th at 7:30pm, Phoenix Clubrooms, Ahiaruhi, Wairarapa

7:30 pm Society News
7:45 pm Understanding Tailed Radio Galaxies
8:45 pm Supper and social time
9:00 pm Documentary: Extreme Planets
Observing will follow the meeting if it is clear.


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Star Party Saturday July 30th from 6pm (Rain or Shine):
Reminders and any cancellations go out on the Phoenix Announcements
emailing list, if you‘re not receiving these then please join up here:
http://groups.google.com/group/phoenix-astro-announcement.

The winter sky is upon us in the form of the constellations of
Scorpius and Sagittarius. We’ll start the evening with dinner before
opening the observatory to take a close up look at the constellations,
clusters and nebulae of winter. We will also have a final look at
Saturn as it begins to move into the western sky.
We‘ll be playing a late night movie from 10pm to keep entertained
those people too tired or cold to observe. If the weather‘s rubbish
we‘ll start it a bit earlier.

6:00 pm Dinner - Gladstone Pub
7:30 pm Presentation
8:00 pm Observing: Scorpius and Sagittarius
10:00 pm Movie