To tackle a centuries-old mystery about galaxy shapes, an astronomer looked for clues in the masses of supermassive black holes.
. If correct, Graham’s proposed update to the evolutionary sequence of galaxies would rewrite the history of the Milky Way.
“We’ve known for a while that that’s almost certainly not correct,” Conselice says. Particularly puzzling is that lenticulars, despite their spiral-like disks, don’t have lots of gas, which hinders them from producing new stars. Spiral galaxies do have lots of star-forming gas, and scientists aren’t sure why lenticular galaxies don’t.
Using images from the Hubble and Spitzer space telescopes, Graham compared the black hole and stellar masses of about 100 nearby galaxies. For galaxies of the same shape, he saw that black hole mass and stellar mass tend to be linked in a predictable way — except for the lenticular galaxies.
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