Starship Asterisk*

Ken Crawford wrote:

BMAONE23 wrote:When I invert the image then adjust the brightness and contrast, the "Blob" at 8:00 appears to be located within a slight tidal stream pointing in the direction of the center of the little sombrero. The "Blob" at 6:00 might also share the same type of structure though fainter. The "Blob" at 10:00 still resembles a blob with no apparent tidal streaming

This why I imaged this galaxy in the first place. The star stream team tries to detect the remnants of the destruction of dwarf galaxies during the interaction with larger ones. For the survey we stretch the data to the breaking point inverted to detect faint structures. What is very cool, is that most of the detection work is done by the Amateurs on the team with modest equipment. See this link if you are more interested . . . . http://www.imagingdeepsky.com/Streams.html

Regards,

Ken C.

Ann wrote:Okay, just one more. I just have to confirm that NGC 7814 really is very similar to M104. Both galaxies have very similar and quite red colors. They have huge bulges and halos and thin dust disks with little star formation. NGC 7814, interestingly, appears to have significant population of intermediately aged stars of spectral classes A, F and G in its disk. M104, by contrast, lacks any obvious concentrations of young stars.

M104 was recently described as two galaxies in one, a combination of an elliptical galaxy and a disk galaxy. Long ago, when the universe was much more gas-rich than today, gas clouds are believed to have fallen into orbit around the young M104, eventually giving rise to the flat disk that we see today. (Maybe M104 can be described as a galaxy-sized version of Saturn?)

Given that NGC 7814 is so similar to M104, it seems likely that the two galaxies formed in similar ways.

Ann

BDanielMayfield wrote:

geckzilla wrote:Easy enough to fix.

Thanks

Beyond wrote: "sonofa". Is that a cash crop

Unfortunately no Beyond, since the region is world famous for producing sonofablanks, some of whom are also sonsofarmers. (Sonso being the plural of “sonofa”).

geckzilla wrote:Easy enough to fix.

Beyond wrote: "sonofa". Is that a cash crop

BMAONE23 wrote:When I invert the image then adjust the brightness and contrast, the "Blob" at 8:00 appears to be located within a slight tidal stream pointing in the direction of the center of the little sombrero. The "Blob" at 6:00 might also share the same type of structure though fainter. The "Blob" at 10:00 still resembles a blob with no apparent tidal streaming

BDanielMayfield wrote:Don’t know why my last comment was attributed to “Guest”, but it came from that weird sonofafarmer from south Texas normally known as BDanielMayfield. Wasn’t trying to be an ominous.

Ann wrote:

BDanielMayfield wrote:

The second grouping that caught my eye is a ruddy little group not far (in the photo) to the left of the main subject. There’s a brighter galaxy in the center with a small swarm of lesser satellite galaxies all around it, but all of these galaxies have a similar reddish appearance. Since the distant galaxies in this area are all reddened to about the same degree I would suspect that we might be seeing them through a patch of dust (inside our galaxy?).

I'd say that these are definitely background galaxies. Note how very small they are, in addition to their redness. This kind of redness shared by a whole group of small-looking galaxies means that the galaxies have been reddened by the expansion of the universe, which has "stretched" the light they emitted to longer and redder wavelengths.

Note that one of the galaxies is bigger and brighter than the others. This could be a distant group of elliptical galaxies, and the brightest one could be really massive.

Ann

BDanielMayfield wrote:

The second grouping that caught my eye is a ruddy little group not far (in the photo) to the left of the main subject. There’s a brighter galaxy in the center with a small swarm of lesser satellite galaxies all around it, but all of these galaxies have a similar reddish appearance. Since the distant galaxies in this area are all reddened to about the same degree I would suspect that we might be seeing them through a patch of dust (inside our galaxy?).

Ken Crawford wrote:Even though I am happy that I was able to capture the deep field around NGC7814 I wish that I could use a larger instrument to bring out more detail in some of the interesting interacting groups. This image was taken for the star stream survey and the goal was to go deep enough to capture the faint dwarf below NGC7814. As mentioned there is another one at the 8:00 O.C. position. I normally would not share a "raw" data frame but I though you might find it interesting to see a Luminance (Clear Filter B&W) image that has been brightened to the point of noise to reveal more of the very faint background galaxies. This image is at 1/2 resolution.

Kindest Regards,
Ken Crawford
http://www.imagingdeepsky.com

Ken Crawford wrote:Even though I am happy that I was able to capture the deep field around NGC7814 I wish that I could use a larger instrument to bring out more detail in some of the interesting interacting groups. This image was taken for the star stream survey and the goal was to go deep enough to capture the faint dwarf below NGC7814. As mentioned there is another one at the 8:00 O.C. position. I normally would not share a "raw" data frame but I though you might find it interesting to see a Luminance (Clear Filter B&W) image that has been brightened to the point of noise to reveal more of the very faint background galaxies. This image is at 1/2 resolution.

Kindest Regards,
Ken Crawford
http://www.imagingdeepsky.com

rstevenson wrote:

BDanielMayfield wrote:The first is located near the top edge at about 11 o’clock from the Little Sombrero. It is a group of three galaxies that are clearly in a merger dance, since tidal tails are very noticeable here. It makes me think of what our local group might look like after the big three have close encounters in several billion years.

I was going to mention that little group. Here's a crop of them, from the available larger image. I suspect that the yellow third member might be much farther away, but the top two are certainly engaged in a dance.

butterfly group.jpg

Rob

BDanielMayfield wrote:... I found two groupings to be of particular interest here.

The first is located near the top edge at about 11 o’clock from the Little Sombrero. It is a group of three galaxies that are clearly in a merger dance, since tidal tails are very noticeable here. It makes me think of what our local group might look like after the big three have close encounters in several billion years.