Actual Astronomy - Globular Star Clusters with Peter Jedicke

The 365 Days of Astronomy

Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan. [e-mail]

Our guest today is Peter Jedicke who was National President of the Royal Astronomical Society of Canada from 2004 to 2006 and is now a Fellow of the RASC. He is also Honorary President of the RASC London Centre. His favourite astronomical topic, both astrophysically and as an observer, is globular clusters and co-authored the RASCC Observer’s Handbook section on Star Clusters. Peter co-authors the Star Clusters section of the RASC Observer's Handbook. Lastly, Peter helped start the list of asteroid names with Canadian connections which will be our topic today but….

Let’s chat about globular star clusters since, as you pointed out Peter, it's best to focus on a narrow topic as the show time whips by!

* Helen B. Sawyer [Hogg], 1947. Out of Old Books-Catalogues of Nebulous Objects in the Eighteenth Century. Journal of the Royal Astronomical Society of Canada, Vol. 41, p. 265-273

Also: Helen B. Sawyer [Hogg], 1948. Astronomical Journal, Vol. 53, p. 117

* * What are Star Clusters?

* - 2 types: OC and GC what is the diff…maybe we’ll do Open Clusters another time.

* - Age & Number of stars which equate to variations in CLs + magnitude, colour + number.

* Where do they come from

* So what is a globular star cluster exactly?

* Why old-rich-symetrical-live in galactic halo?

* What are the differences in concentration and spectral classifications?

* What is it you enjoy about globulars?

* Variable stars in globular clusters

* Helen Sawyer Hogg & my one summer working as a "research assistant" at Western U.

* Something about where globular clusters fit in with cosmology. Age & role in galaxy mergers.

* How many have you observed?

* Where have you traveled to observe them?

* Which are your favourites?

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