Evidence for warping in outer disc of Milky Way galaxy.
The precise shape of our galaxy is difficult to determine because we are inside it and a lot is hidden from us by dust. Using the Japanese/South African Infrared Survey Facility at Sutherland, M.W Feast, J.W. Menzies, N. Matsunaga and P.A. Whitelock have found a number of Cepheid variables in a direction about opposite to the Galactic Centre (Nature on-line 14 May 2014). Since the luminosities of these stars are well known, the newly discovered ones could be shown to lie at a distance appropriate to an outer spiral arm. However, they lie somewhat above the Galactic Plane, leading to the conclusion that the arm must be a warped one.
|Printer friendly Cite/link Email Feedback|
|Title Annotation:||News Notes|
|Publication:||Monthly Notes of the Astronomical Society of Southern Africa|
|Article Type:||Brief article|
|Date:||Jun 1, 2014|
|Previous Article:||Close binary black hole in a triple system.|
|Next Article:||Obituary: Thomas Harry Hope (Tom) Lloyd Evans 1940-2014.|