Description (Wikipedia)NGC 4725 is an
intermediatebarred spiral galaxy with a prominent ring structure,
[9] located in the northern
constellation of
Coma Berenices near the
north galactic pole.
[10] It was discovered by German-born British astronomer
William Herschel on April 6, 1785.
[11] The galaxy lies at a distance of approximately 40
megalight-years[4] from the
Milky Way. NGC 4725 is the brightest member of the
Coma I Group[12] of the Coma-Sculptor Cloud, although it is relatively isolated from the other members of this group.
[6] This galaxy is strongly disturbed and is interacting with neighboring spiral galaxy
NGC 4747, with its spiral arms showing indications of warping. The pair have an
angular separation of 24′, which corresponds to a projected linear separation of 370
kly.
[5] A tidal plume extends from NGC 4747 toward NGC 4725.
NGC 4725 is a suspected type 2
Seyfert galaxy with a
supermassive black hole at the core.
[13] The
morphological classification of this galaxy is SAB(r)ab pec,
[5] indicating a peculiar, weakly-barred spiral galaxy (SAB) with a complete ring surrounding the bar (r) and somewhat tightly-wound
spiral arms (ab). It is actually double-barred, a feature found among about a third of all barred spirals.
[14] The
galactic plane is inclined by approximately 46° to the line of sight from the Earth.
[6]The ring structure of the galaxy is a region of
star formation. It is offset from the galactic center and displays non-circular motion.
[15] There is a compact
radio source positioned approximately 6.2 kly from the nucleus of NGC 4725. Since there is no optical counterpart at that position, this may be a star forming region that is heavily obscured by dust.
[9]Processing workflowChrominance: WBPP, autocrop, GradientRemoval, RGB combination, Background Neutralisation, Image Solving, SpectroPhotometric ColorCalibration, Deconvolution, Noise reduction, Starextraction, GHS, Curves
Luminance: WBPP with 2xdrizzle, GradientRemoval, Deconvolution, denoise, GHS, Curves, denoise, HDRM MST, LocalHistogramNormalization, UnsharpMask (blending these together)
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