NGC5248 a rarely photographed Galaxy in Bootes (Stephan Linhart)

Celestial hemisphere: Northern · Constellation: Boötes (Boo) · Contains: NGC 5248 · PGC 1351124 · PGC 1351207 · PGC 1351254 · PGC 1352230 · PGC 1360982 · PGC 48046 · PGC 48090 · PGC 48114

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NGC5248 a rarely photographed Galaxy in Bootes

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NGC5248 a rarely photographed Galaxy in Bootes

Have not seen too many pictures of this Galaxies around by amateurs, so I thought it might be worthwhile to try myself on it.

Although within the boundaries of the Herdsman, NGC 5248 is actually part of the Virgo Cluster. NGC 5248 is estimated to be 50 million light years away. Short exposures of this galaxy show the bright structures of the central regions. Many dust lanes, HII (red) regions, and blue stellar associations populate this busy area. Deeper exposures begin to show the two dim, tenous outer arms of the galaxy. NGC 5248 appears to be a combination of M 81, with two distinct arms, and M 100, with a detailed nucleus.

For decades, NGC 5248 has been thought to host a short bar 1.6 kpc in radius. Dynamical and morphological arguments, however, argue that its spiral structure is being driven by a large-scale bar 8.6 kpc in radius. The bar is embedded within a fainter outer disk, visible out to a radius of 17.2 kpc. The recently discovered large-scale bar in NGC 5248 generates spiral structure that extends out 10 kpc, fuels star formation, and drives disk evolution. Deep inside the bar, two massive molecular spirals feed a starburst ring of super-star clusters 375 pc from the core.

The classical grand-design spirals of NGC 5248 lie on the leading edge of the large-scale stellar bar, and are accompanied by concave dust lanes. The offset between the dust and young stars is consistent with our understanding of gas flows in barred galaxies, where shock waves along the leading edges of a moderately strong bar compress the gas to form massive young stars. NGC 5248 illustrates how intense star formation along a moderately strong bar can lead to conspicuous open spiral arms within the bar itself.

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Status	Advanced success
Started	...
Astrometry.net job	8245437
PixInsight job	IH4TMDJN7U3L9A100DQ35LV9S260P6JF
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h37m31s.981
RA (top/left)	13h38m30s.674
RA (top/right)	13h38m23s.906
RA (bottom/right)	13h36m33s.533
RA (bottom/left)	13h36m40s.469

Dec (center)	+08°52′59″.90
Dec (top/left)	+08°32′50″.58
Dec (top/right)	+09°14′14″.89
Dec (bottom/right)	+09°13′05″.46
Dec (bottom/left)	+08°31′44″.70

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NGC5248 a rarely photographed Galaxy in Bootes

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