Milky Way from Aquila to Cygnus:
A region full of supernova remnants
A 45°×62° view of the Milky Way in the constellations Aquila, Sagitta, Vulpecula and Cygnus is presented.
That part of the sky is full of emission nebulae. Many of them are known supernova remnants,
and the huge HII region in Cygnus also appears to have been formed by ancient supernovae.
Click on the image to load a high resolution (375 MP) version using a JavaScript viewer.
The center of the image is dominated by a huge HII region in the constellation Cygnus. These structures appear to have been formed by ancient supernovae. An attempt to identify bubbles (some of them may not be real) can be found in Possible uncataloged bubbles.
(In the JavaScript viewer, these objects can be plotted by enabling the SIMG catalog in the menu ('F2' key). Visualization ban be improved by toggling the objects on and off using the '3' key.)
In the past, it was suspected that most of the filaments in this region are part of a single superstructure, the “Cygnus Superbubble”.
However, Uyanıker et al. (2001) found that these objects are located at significantly different distances.
(This paper also provides a good overview of the nebulae in this area.)
In the image, the different nature of the SNRs can also be clearly seen in their varying colors.
The nebula near the upper border is SH2-126, which is ionized by the LAC OB1 association, located 450 pc away.
Near the left border, the large supernova remnant (red and blue) SNR G070.0-21.5 can be found.
Between these two objects, there is a unstructured OIII nebula
that can't be found in standard catalogs or the SIMBAD database. Almost exactly in the center, a very nearby — just about 110 parsecs or 360 light-years — hot subdwarf is located.
Thus, this object might be a planetary nebula slightly closer than Sh2-216, which is usually considered the nearest planetary nebula.
Other prominent objects in the image are the supernova remnants Cygnus Loop and SNR G070.0-21.5, and
the Planetary nebula MWP 1.
The hidden SNR G082.2+05.3 is also visible in this color composite.
In this image, several SII-rich supernova remnants become visible in red.
Same view as above, but here only showing Hα.
In this pseudo-color composite, the color depends on Hα intensity (without continuum), as shown in the legend with units in Rayleighs.
The Brightest stars are added in white to visualize the regions where Hα intensity is uncertain due to contamination by starlight.
The bright 5°-large nebula on the left border becomes visible only after continuum subtraction, as it lies in a dense star field.
The bright region next to it is ionized by the VUL OB1 association, located at a distance of about 2300 pc.
![Milky Way from Aquila to Cygnus in [OIII], H-alpha, and [SII]](sge-cyg-ohs-1400.jpg)
![Milky Way from Aquila to Cygnus in [SII], H-alpha, and [OIII]](sge-cyg-sho-1400.jpg)
Image data
This image was calculated using data from the Northern Sky Narrowband Survey, DR0.2. Click the link for detailed information or visit the instruments page for information about the equipment. Here is some additional image-specific information:
| Center position: | RA: 22:34h, DEC: 37.5° |
|---|---|
| FOV: | 62°×45° (RA×DEC, through center) |
| Orientation: | JavaScript viewer: North is up Above: North is right |
| Scale: | 10 arcsec/pixel (in center at full resolution) |
| Projection type: | Stereographic |
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