New Caltech Study Suggests We Were Wrong About White Dwarf Supernovae

Hello and welcome! My name is Anton and in this video, we will talk about new research that suggests some white dwarf stars don't behave as they should and that the size of the universe might be in question.

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[lucidd]

Keep up the good work Anton, you are one of my preferred channel on youtube because you always manage to get to an admirable balance between reality (fact from papers) and fundamental physical principle explaining those. And this make your video just more interesting, simple and explanatory than most channels i watch on those subjects.

[BelleDividends]

Possible explanations:
(1) Current stars have accumulated more iron, supernova after supernova, without the limit of 1.4 having actually changed
(2) Back in the days, supernova occurred more because of stars colliding than of overreaching the weight limit. Space was also a lot smaller back then.

[davixavier]

It’s part of the learning process! Let’s keep learning! Thanks for sharing!

[disruptive_innovator]

Neat. Would be interesting if this lead to a reassessment of the size of the observable universe.
It's lovely when old settled science gets a bit of a shake up. Sometimes some cool new things fall out.

[Yvory]

From what I've read in the past, it was already suggested that a dwarf having couples episodes of "Nova" could get fragilised and explode or fracture into pieces with a last nova event witch is simply a thermo nuclear explosion without advanced fusion, so not produced any heavier element.

[robertdees]

Sounds like it might also be possible that they overestimated how many type1A supernova that occurred in those ancient galaxies.

[williamnicholson]

Could be because the stars are metal poor as metals absorb energy . The more metals in a white dwarf the more massive it needs to be for its chandra limit.

[Alberts_Stuff]

I just realised that your intro music sounds like it was made on a BBC Micro - circa 1983 😂
Not a Diss, love your channel bro 👍🏻

[Shaden]

Maybe the amount of nickel in the original star causes changes in the Chandrasekar limit? No Nickel allows the star to supernova at a lower mass, while the more you have causes the super nova to happen when there is more mass. Kind of like control rods in a nuclear fission reactor slowing down reactions.

[baruchben-david]

I've always wondered whether the Type 1a supernova was really a good way to estimate distances.

[petermontagnon]

We only ask questions!! My High School teacher always said, " The only stupid question, is the one that hasn't been asked!!"

[lesadams]

Very fascinating stuff. Much of what we know in Cosmology is based on fairly simple ideas and observations and the more frequently certain types of events happen, the more convinced we are of the basis in fact (but then along comes a curved ball, a less frequent event that forces us to change our model).

I'm amused by the thought that the universe is said to have started with a Big Bang and yet all those little supernovae are like little cracks afterwards.

[vgernyc]

Got have something to do with the amount of preexisting heavy elements in the white dwarf at the time of the explosion

[Oddness]

Are you suggesting that the laws of physics have changed over time?
That would be interesting. It could also explain other inconsistencies.

[MartinCHorowitz]

Older stars have lower metalicity, not a surprise that limit could move based on material content

[joelisSHI]

Ben on suspiciousobservers talks about micro novas and says there is evidence our Sun has gone through a few.

Could you look at this please?

I greatly enjoy being here every day.
Thank you brother

[ellisonhamilton]

Change the size of the universe and you change it's age as well.
Very interesting.
Thank you Anton.

[LostInThezone]

Wonderful Anton provides some of the most interesting space news on YouTube.

[TheZeroNeonix]

How do you always have something new to talk about every day? You never seem to run out of material.

[johnchandler]

Really, 1st time to make a comment 😀, nebulas are some of the most beautiful things.