NGC 1511
jac berne (flickr)
STScI Mikulski Archive | Release Date2024-04-19 18:23So interesting, Jac! NGC 1511 is really a quite blue galaxy with a lot of star formation. Its B-V index is 0.57, and its U-B index is —0.05. This is blue for a galaxy, whose "average" B-V index might be closer to 0.70 and its U-B index might be closer to, say, +0.10. Add to this that the far infrared magnitude of NGC 1511, 9.7, is two magnitudes brighter than its B magnitude, which is 11.8. This is typical of dusty starforming galaxies. And indeed, the HST(?) image looks very dusty, and there are a lot of blue stars there. In fact, the HST image looks somewhat chaotic.
NGC 3972 is a spiral galaxy located in the northern constellation of Ursa Major. It was discovered by William Herschel on April 14, 1789.This galaxy is located 66 million light years away and is receding with a heliocentric radial velocity of 846 km/s. It is a member of the NGC 3992 Group of galaxies.
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JWST4Y Jac
How different is the JWST image! We see the elegant "backbone" of the galaxy, the mass concentration in the form of billions of cool low-mass stars in the well-formed arms.
Fantastic! It is as if the small red stars are the "cake" of NGC 1511, and the starry blue fluff and all the dust is just the icing of the cake!
Ann
Statistics: Posted by Ann — Mon Apr 22, 2024 5:20 am — Replies 17 — Views 14762