Hemisphere:  Northern  ·  Constellation: Camelopardalis (Cam)  ·  Contains:  PGC20348  ·  PGC20398  ·  PGC213372  ·  PGC2746509  ·  PGC2746563
Getting plate-solving status, please wait...
UGC 3697, 



    
        

            Gary Imm
UGC 3697, 



    
        

            Gary Imm

UGC 3697

Getting plate-solving status, please wait...
UGC 3697, 



    
        

            Gary Imm
UGC 3697, 



    
        

            Gary Imm

UGC 3697

Imaging telescopes or lenses: Celestron EdgeHD 11

Imaging cameras: ZWO ASI 1600MM Cooled Pro

Mounts: Astro-Physics Mach1GTO

Guiding cameras: ZWO ASI 174 MM Mini

Software: Main Sequence Software Sequence Generator Pro  ·  Pixinsight  ·  Stark Labs PHD2 2.6.3

Filters: Astrodon Green 31mm Gen2 I-Series  ·  Astrodon Blue 31mm Gen2 I-Series  ·  Astrodon Lum 31mm Gen2 I-Series  ·  Astrodon Red 31mm Gen2 I-Series

Accessory: ZWO EFW 2″X7  ·  Celestron OAG  ·  MoonLite Focuser for EdgeHD 11


Dates:Dec. 17, 2020Dec. 18, 2020

Frames:
Astrodon Blue 31mm Gen2 I-Series: 30x120" (gain: 139.00) -20C bin 1x1
Astrodon Green 31mm Gen2 I-Series: 30x120" (gain: 139.00) -20C bin 1x1
Astrodon Lum 31mm Gen2 I-Series: 60x120" (gain: 139.00) -20C bin 1x1
Astrodon Red 31mm Gen2 I-Series: 30x120" (gain: 139.00) -20C bin 1x1

Integration: 5.0 hours

Avg. Moon age: 3.57 days

Avg. Moon phase: 13.95%


Astrometry.net job: 4204259

RA center: 7h 11' 22"

DEC center: +71° 50' 10"

Pixel scale: 0.343 arcsec/pixel

Orientation: -1.621 degrees

Field radius: 0.188 degrees


Resolution: 3048x2510

Locations: Backyard (Mag 20.8 - Bortle 4.5), Onalaska, Texas, United States

Data source: Backyard

Description

This object is an edge-on warped spiral galaxy located 150 million light years away in the constellation of Camelopardalis at a declination of +71 degrees. It spans 2.3 arc-minutes in our apparent view, which corresponds to a diameter of 100,000 light years. This may qualify as the most visually striking galaxy not to have a Messier, NGC, or IC designation.

The warping and color make this one of my favorite galaxy objects. As you might expect, it is the highlight galaxy in my Warped Disk Collection.

This galaxy is nicknamed the Integral Sign Galaxy. It was not included by Dr. Arp in his collection of peculiar galaxies, even though he had a category called Integral Sign Galaxies. But all of those galaxies present a face-on view, not edge-on like this one. Those Arp face-on "Integral Sign Galaxies" are not warped and frankly are not that unusual, so this galaxy has the distinction of being the best Integral Sign Galaxy despite not making Arp's category of that type.

Something seems to be disturbing this galaxy and causing star formation in the outer disk region, as reflected by the intense blue color and star clusters. A faint disk stream extends from the left edge of the disk towards the galaxy (UGC 3714) at lower left. That galaxy is an interesting bright face-on spiral galaxy, unique in that it appears to have a bright sphere of starlight around it which somewhat obscures the disk details. The data shows it about 140 million light years away, about 10 million light years from UGC 3697. This is not close enough to cause disturbance. But, this type of distance data has a range of uncertainty. I sense from the star stream direction that these two are interacting, but that is just a guess on my part.

Still, what is causing the severe warp of UGC 3697? Surprisingly, scientists are not in agreement as to why many galaxy disks (even our own) are warped. Simulations show that gravitational effects from nearby galaxies are not significant enough to create such a warp in a nearby rotating galaxy. Possibilities that may cause the warp include a recent merger, the presence of satellite galaxies, or the always reliable fallback explanation of a dark matter halo. In any case, it is likely that the severe warp we see on UGC 3697 is a transient effect, and we are simply fortunate to be seeing it at this interesting snapshot in its history.

Comments

Revisions

  • Final
    UGC 3697, 



    
        

            Gary Imm
    Original
  • UGC 3697, 



    
        

            Gary Imm
    C

C

Description: Astrobin Mouseover

Uploaded: ...

Sky plot

Sky plot

Histogram

UGC 3697, 



    
        

            Gary Imm