NGC 1097 - barred spiral galaxy in Fornax

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12" ASA: LRGB 12" ASA: LRGB crop 12" ASA+16" DC - combined L frame 12" ASA+16" DC - combined L crop

12" ASA+16" DC - inverted crop

16" DC - LRGB

12" ASA: processing Warren A. Keller
Size: 2000 px Size: 2000 px Size: 2000 px Size: 2000 px Size: 2000 px Size: 2000 px Size: 2000 px
 
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© Velimir Popov & Emil Ivanov 2014
 

This nice barred spiral galaxy is about 45 million light-years away in the constellation Fornax. Discovered by William Herschel on 9 October 1790, NGC 1097 is a a Seyfert galaxy. Deep photographs reveal four narrow optical jets that appear to emanate from the galaxy's nucleus. On the DC 16" image and on combined ASA 12" + DC 16" images are visible all four jets (two above and two below the galaxy). On the images taken only with ASA 12", the lower two jets are indistinguishable. These optical jets are in fact composed of stars. The failure to detect atomic hydrogen gas in the jets led to the interpretation that they are actually the shattered remains of a cannibalized dwarf galaxy. Like most massive galaxies, NGC 1097 has a supermassive black hole at its center. NGC 1097 has two satellite galaxies. Dwarf elliptical galaxy NGC 1097A (situated at 1 o'clock of the nucleus) is a peculiar elliptical galaxy that orbits 42,000 light-years from the center of NGC 1097. Dwarf galaxy NGC 1097B, (which is seen as small blue spot near NGC 1097A) appears to be a typical dwarf irregular galaxy. Three supernovae (SN 1992bd, SN 1999eu, and SN 2003B) have been observed in NGC 1097. Many thanks to our great astroimager friend Warren A. Keller, whose fantastic processing can be seen at the rightmost position.

 

Image details:

Annotation

Center of field RA 02:46:31(h:m:s)
Center of field DE -30:15:03 (deg:m:s)
Size 51.8 x 38.2 (arcmin)
Pixel scale: 1.03 (arcsec/pixel)
Orientation: Up is 175 degrees E of N
Charts and image details obtained from Astrometry.net
Optic(s): ASA 12" f 3,6 Astrograph (ASA)
Mount: ASA DDM85
Camera: FLI MicroLine 8300 CCD camera
Filters: Luminance, Red, Green, Blue, Astrodon filters
Dates/Times: 28 August 2014
Location: Namibia-TIVOLI ASTROFARM, S 23° 27' 40,9" / E 18° 01' 02,2"
Exp. Details: L:9x10min,R:9x10min, G:9x10min, B:9x10min,, Bin1,
  Total Exposure Time - 360 min.
More details: Dark and flat frames reduction,
Processing: PixInsight / PS (Warren Keller - only PixInsight)
 
Copyright: Velimir Popov and Emil Ivanov 2014. All Rights Reserved
 
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