Hi. I saw this: https://www.forbes.com/sites/starts...a-third-way-to-form-black-holes/#52d7225f216d suggesting they saw a star undergo a "direct collapse" to a black hole with no supernova. Now this seems like it could be sensible -- if there's enough gravity then it could just keep on crushing past even any other further sources of explosive energy release. Yet the part I wonder about is why wouldn't there at least be SOME kind of attendant energy pulse with this collapse? In particular, wouldn't as all that gas collapses on itself but before it reaches the black hole size, heat up tremendously due to compression and thus emit an enormous light (EM radiation) pulse just before vanishing into the black hole? Or is it just far too fast for that? Or were they just not looking when the energy pulse was emitted (note the large discrepancy in dates between the two photographs)?