M82-Dean-Ashton
A combination technique for creating an HaRGB image. Data: 31x600s RGB data with Optolong L-Pro filter; 35x600s Ha data using LeNhance and LeXtreme filters with OSC. By Dean Ashton
NGC4244 on the lower left and NGC4214 middle right.
It’s NGC4214 that piqued my interest. The most obvious is how chaotic it looks. On further investigation it’s classed as an ‘Irregular’. In my copy of ‘Hubble Atlas of Galaxies’ it goes further and names them as Irr Type 1 or Megallanic Cloud type irregulars. If they took the Large Megallanic Cloud and repositioned it 11 mly away it would look very much like NGC4214 shown here.
It’s also called a s Starburst galaxy, which is one with an exceptionally high rate of star formation compared to the average. This activity is so great, that around the 6 or so blue star clusters, the stellar winds form bubbles in the surrounding gas. Over time these bubble increase in size as the Hot ‘O’ type stars within them grow older. This activity is so great that these galaxies are often called Wolf-Reyet galaxies. As well as containing lots of new young stars, this galaxy contains many old red supergiants which suggest that this bout of current star formation is not the first and with the abundant supply of hydrogen will likely continue to do so in the future.
M101 – NGC5457
42x600s exposures of M101 captured on the 22 and 25 May, 2023, showing super nova 2023ixf. The image has been enhanced by addition of 95x600s exposures that I took in March 2020 of M101 using a Celestron Nightscape 10100 CCD camera but with the same scope and filter.
SN2023ixf was only taken from the 2023 exposures and cloned on to the full 137x600s image, at the linear phase of the processing so that the relative brightness of the supernova compared with foreground stars remains accurate. By Dean Ashton.
M31
Takahashi FSQ-ED 106 f/5
Camera: SBIG STL-11000
Mount: Paramount PME
Filters: LRGB
Exposure: 11 x 300sec Bin 1×1, 5 x 300 sec in the Blue, 9 x 180 sec in the Green and 7 x 300 sec in the Red RGB all 2×2 bin. Dark Subtracted, Flat fielded
By Nick Tonkin
NGC 5194 Messier M51
NGC 5194 Messier M51 by Dean Ashton.
NGC6888
by Dean Ashton
All images are Copyright of the respective owners names against each image.