Contact Us

Thanks for visiting the website. If you want to get in touch you can reach me through Twitter or please fill out the form on the right.

         

123 Street Avenue, City Town, 99999

(123) 555-6789

email@address.com

 

You can set your address, phone number, email and site description in the settings tab.
Link to read me page with more information.

005A1520 copy.jpg

Blog

Filtering by Tag: Gaia

"A geometric calibration of the tip of the red giant branch in the Milky Way using Gaia DR3" - Dixon et al. (2023)

Alan Duffy

How do you measure distances in space? There’s no tape measure to stretch between the stars of course, but instead there are a series of techniques that work over ever increasing distances with one technique handing over to the next - the first rung on that distance ladder is Parallax (I once tried to explain this live on national Breakfast TV!) and my student Mitchell Dixon has just published a definitive study on that technique as it maps to the next rung of a special class of stars known as Tip of the Red Giant Branch (TRGB) stars which have a known (or at least calibrated!) brightness that depends on how rapidly the brighten and fade.

Read More

"Gaia EDR3 bright star parallax zero-point using stellar clusters" - Flynn et al. (2021)

Alan Duffy

he incredible Gaia spacecraft has been monitoring the almost imperceptible drift of the stars in our Milky Way for the last decade, allowing us to measure their exact 3D position using the powerful parallax method. Yet even these measures can be improved in time as this work by Swinburne’s Dr Chris Flynn shows.

Read More