Celestial hemisphere:  Northern  ·  Constellation: Triangulum (Tri)  ·  Contains:  IC 1727  ·  IC 1731  ·  NGC 672  ·  NGC 684
Getting plate-solving status, please wait...
galaxies and an asterism revisited, Wim van Berlo
galaxies and an asterism revisited
Powered byPixInsight

galaxies and an asterism revisited

Getting plate-solving status, please wait...
galaxies and an asterism revisited, Wim van Berlo
galaxies and an asterism revisited
Powered byPixInsight

galaxies and an asterism revisited

Equipment

Loading...

Acquisition details

Loading...

Description

The data si from november 2021. The processing is new.
Russel Cromans suite of Xterminators allowed more detail to be pulled out of the data, but couldn't save the luminance which was blurred too much. Probably poor focus.

There is a lot of interesting physics going on in this image.
The galaxy tagged as J0150+2725 is a lensing galaxy. The galaxy itself is approximately 4.5 billion light years distant. It acts as a gravitational lens for one or several galaxies that are three times as far away. A study with the Hubble Telescope has shown that the lensed galaxy has a red shift of 1.08. The lensed galaxy is of course not visible in this image. Or is it? Some of the red fuzzy patches around J0150+2725 are indicated in the mentioned study. But it's not clear to me if these are in fact lensed galaxies.
https://iopscience.iop.org/article/10.3847/1538-4365/ab5f13/pdf
Near the top of the image is the faintest and most distant galaxy cluster I have ever captured. In the yellow circle is galaxy cluster RM J014914.9+273706.1. The galaxies in this cluster have a red shift of 0.506, which puts them at 6.8 billion light years distant. The light that was captured for this image, left those galaxies when what would become our sun, was still a cloud of hydrogen atoms, slowly growing denser and hotter.
There are several quasars in this image, I have only tagged the ones with a red shift of approximately 2 and higher. Several others with red shifts between 1.2 - 1.6 are strewn across the field of view.
J014947.9+271728 is a candidate subdwarf star. Subdwarf stars are hot, blue stars that are less luminous than main sequence blue stars. These stars are burning Helium.
"To end up on the EHB, stars have to lose almost their entire hydrogen envelopes in the red-giant phase, most likely via binary mass transfer. Consequently, hot subdwarfs have turned out to be important objects to study close binary interactions and their companions can be substellar objects such as brown dwarfs, all kinds of main sequence stars, white dwarfs, and maybe even neutron stars or black holes." 
https://www.aanda.org/articles/aa/full_html/2019/01/aa34236-18/aa34236-18.html

Comments

Revisions

  • Final
    galaxies and an asterism revisited, Wim van Berlo
    Original
  • galaxies and an asterism revisited, Wim van Berlo
    B

B

Description: Added annotations. These are commented on in the image description

Uploaded: ...

Sky plot

Sky plot

Histogram

galaxies and an asterism revisited, Wim van Berlo